pesticides harmful to bees
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http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees
Pesticide toxicity to beesFrom Wikipedia, the free encyclopedia
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Pesticides vary in their effects on bees. Contact pesticides are usually sprayed on plants and can kill bees
when they crawl over sprayed surfaces of plants or other media. Systemic pesticides, on the other hand, are
usually incorporated into the soil or onto seeds and move up into the stem, leaves, nectar, and pollen of plants[1]
Dust and wettable powderpesticides tend to be more hazardous to bees than solutions or emulsifiable
concentrates for contact pesticides.
Actual damage to bee populations is a function of toxicity and exposure of the compound, in combination withthe mode of application. A systemic pesticide, which is incorporated into the soil or coated on seeds, may kill
soil-dwelling insects, such as grubs ormole crickets as well as other insects, including bees, that are exposed
to the leaves, fruits, pollen, and nectar of the treated plants. [2][3]
Contents
[hide]
1 Classification
2 Colony collapse disorder
3 Bee kill rate per hive
4 Pesticideso 4.1 Common insecticides toxic to bees and used on
soybeans
o 4.2 Highly toxic and banned in the US
4.2.1 Lawsuit against the EPA in the United States
5 See also
6 References
7 External links
[edit] Classification
Insecticide toxicity is generally measured using acute contact toxicity valuesLD50 the exposure level that
causes 50% of the population exposed to die. Toxicity thresholds are generally set at [4][5]
highly toxic (acute LD50 < 2g/bee)
moderately toxic (acute LD50 2 - 10.99g/bee)
slightly toxic (acute LD50 11 - 100g/bee)
non-toxic (acute LD50 > 100g/bee) to adult bees.
[edit] Colony collapse disorder
Colony collapse disorder(CCD) is a syndrome that is characterized by the sudden loss of adult bees from the
hive. Many possible explanations for CCD have been proposed, but no one primary cause has been found. Th
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US Department of Agriculture (USDA) has indicated in a report to Congress that a combination of factorsmay be causing CCD, including pesticides, pathogens, and parasites, all of which have been found at high
levels in affected bee hives.[6]
For the majority of pesticides that are registered in the United States, EPA only requires a short-term contact
toxicity test on adult honeybees. In some cases, the agency also receives short-term oral toxicity tests, whichare required in Europe. EPA's testing requirements do not account for sub-lethal effects to bees or effects on
brood or larvae. Their testing requirements are also not designed to determine effects in bees from exposure to
systemic pesticides. With Colony Collapse Disorder, whole hive tests in the field are needed in order todetermine the effects of a pesticide on bee colonies. To date, there are very few scientifically valid whole hive
studies that can be used to determine the effects of pesticides on bee colonies. [7]
[edit] Bee kill rate per hive
The kill rate of bees in a single bee hive can be classified as: [8]
< 100 bees per day - normal die off rate200-400 bees per day - low kill
500-900 bees per day - moderate kill
> 1000 bees per day - high kill
[edit] Pesticides
Common name
(ISO)
Examples of
Brand names
Pesticide Class length of
residual
toxicity
Comments Bee
toxicity
Aldicarb Temik Carbamate apply 4 weeks beforebloom
Relativelynon-toxic
Carbaryl[9] Sevin,
(b) Sevin XLR
Carbamate High risk
to bees
foraging
even 10
hoursafter
spraying;
3 7
days (b)8 hours
@ 1.5
lb/acre(168
g/Ha) or
less.
Bees poisoned with
carbaryl can take 23days to die,
appearing inactive as
if cold. It allowsthem time to take
contaminated nectar
and pollen back tothe colony. Some
crops treated with
Sevin under thewrong conditions (in
bloom, using a dustformulation, with
large numbers ofbees in the field)
have been
responsible fordisastrous kills.
Sevin is one of the
United States' mostwidely used
insecticides for a
highly
toxic
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wide variety of
insect pests. It is also
one of the most toxicto honey bees, in
certain formulations.
These should never
be sprayed onflowering crops
especially if bees areactive and the croprequires pollination.
There are
formulations,however, which are
determined to be less
toxic (see tables).
Usually, applicator-beekeeper
communication can
effectively be used toadequately protect
bees from Sevin
poisoning.
Carbofuran[10] Furadan Carbamate 7 14
days
U.S. Environmental
Protection Agencyban on use on crops
grown for human
consumption (2009)
carbofuran (bannedin granular form)[10]
highly
toxic
Methomyl[11]
Lannate, Nudrin Carbamate 2 hours + Should never besprayed on flowering
crops especially if
bees are active andthe crop requires
pollination.
highlytoxic
Methiocarb Mesurol Carbamate highlytoxic
mexacarbate[12] Zectran Carbamate highlytoxic
Pirimicarb Pirimor, Aphox Carbamate Relatively
non-toxicPropoxur[13] Baygon Carbamate highly
toxic
Acephate[14] Orthene Organophosphate 3 days Moderatel
toxic
Azinphos-methyl[15]
Guthion, Methyl-
Guthion
Organophosphate 2.5 days banned in the
European Union
since 2006.[16]
highly
toxic
Chlorpyrifos[17] Dursban, Lorsban Organophosphate banned in the US
for home and
garden use Should
highlytoxic
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never be sprayed on
flowering crops
especially if bees areactive and the crop
requires pollination.
Coumaphos[18] Checkmite Organophosphate This is an insecticidethat is used inside the
beehiveto combat
varroa mitesandsmall hive beetles,
which areparasites
of the honey bee.Overdoses can lead
to bee poisoning.
Relativelynon-toxic
Demeton[19] Systox Organophosphate 8 fl
oz/acre
highly
toxic
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maldison,
mercaptothion
(58
L/km)
5.5
days
Methamidophos[27]
Monitor, Tameron Organophosphate Should never be
sprayed on floweringcrops especially if
bees are active and
the crop requirespollination.
highly
toxic
Methidathion[28] Supracide Organophosphate Should never be
sprayed on floweringcrops especially if
bees are active and
the crop requirespollination.
highly
toxic
methyl parathion Parathion,[29]
Penncap-M
Organophosphate 58 days By far the most
potentially damagingpesticides for honey
bees are thosepackaged in tinycapsules
(microencapsulated).
Microencapsulatedmethyl parathion
(PennCap M), for
example, is a liquidformulation
containing capsules
approximately the
size of pollen grains,which contain the
active ingredient.
When bees are out inthe field, these
capsules can become
attachedelectrostatically to
the pollen-collecting
hairs of the insects,
and at times are
collected by design.When stored in
pollen, the slow-release feature of the
capsules allows the
methyl parathion tobe a potential killer
for several months.
At the present time,there is no way to
detect whether bees
highly
toxic
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are indeed poisoned
by micro-
encapsulated methylparathion, so a
beekeeper potentially
could lose
replacement bees forthose already
poisoned by thepesticide. It is,therefore, strongly
recommended by
experts that thisformulation be used
only when honey bee
exposure is not a
possibility.
It is classified as a
UNEPPersistentOrganic Pollutant
and WHOToxicityClass, "Ia, Extremely
Hazardous".
Mevinphos[30] Phosdrin Organophosphate highly
toxic
Monocrotophos[31] Azodrin Organophosphate Should never be
sprayed on flowering
crops especially ifbees are active and
the crop requirespollination.
highly
toxic
Naled[32] Dibrom Organophosphate 16 hours highly
toxic
Omethoate Organophosphate Should never be
sprayed on flowering
crops especially ifbees are active and
the crop requires
pollination.
highly
toxic
Oxydemeton-
methyl[33]
Metasystox-R Organophosphate
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Trichlorfon,
Metrifonate
Dylox, Dipterex Organophosphate 3 6 hours Relatively
non-toxic
Permethrin[36] Ambush, Pounce Synthetic
pyrethroid
1 2
days
safened by
repellency under arid
conditions.
Permethrin is alsothe active ingredient
in insecticides used
against the Smallhive beetle, which is
aparasite of the
beehivein thetemperate climate
regions.
highly
toxic
Cypermethrin[37] Ammo, Raid Syntheticpyrethroid
Less than2 hours
Cypermethrin isfound in many
household ant and
cockroach killers,including Raidand
ant chalk.
highlytoxic
Fenvalerate[38] Asana, Pydrin Synthetic
pyrethroid
1 day safened by
repellency under arid
conditions
highly
toxic
Resmethrin[39] [40]
[41][42][43]
Chrysron,
Crossfire,
Pynosect, RaidFlying Insect
Killer, Scourge,
Sun-Bugger #4,SPB-1382,
Synthrin, Syntox,Vectrin, WhitmirePT-110
Synthetic
pyrethroid
highly
toxic
Methoxychlor[44] DMDT, Marlate Chlorinatedcyclodiene
2 hours available as aGeneral Use
Pesticide
highlytoxic
Endosulfan[45] Thiodan Chlorinatedcyclodiene
8 hours banned in
European Union
(2007?),New
Zealand (2009)
moderatelytoxic
Clothianidin Poncho Neonicotinoid Banned in
Germany
In June 2008, theFederal Ministry of
Food, Agriculture
and ConsumerProtection
(Germany)
suspended theregistration of eight
neonicotinoid
Highly
Toxic[47]
http://en.wikipedia.org/wiki/Trichlorfonhttp://en.wikipedia.org/wiki/Permethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-35http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-35http://en.wikipedia.org/wiki/Pyrethroidhttp://en.wikipedia.org/wiki/Pyrethroidhttp://en.wikipedia.org/wiki/Small_hive_beetlehttp://en.wikipedia.org/wiki/Small_hive_beetlehttp://en.wikipedia.org/wiki/Parasitehttp://en.wikipedia.org/wiki/Beehive_(beekeeping)http://en.wikipedia.org/wiki/Beehive_(beekeeping)http://en.wikipedia.org/wiki/Cypermethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-36http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-36http://en.wikipedia.org/wiki/Anthttp://en.wikipedia.org/wiki/Cockroachhttp://en.wikipedia.org/wiki/Raid_(insecticide)http://en.wikipedia.org/wiki/Raid_(insecticide)http://en.wikipedia.org/wiki/Ant_chalkhttp://en.wikipedia.org/wiki/Fenvaleratehttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-37http://en.wikipedia.org/wiki/Resmethrinhttp://en.wikipedia.org/wiki/Resmethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-38http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-38http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-39http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-39http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-40http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-41http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-41http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-42http://en.wikipedia.org/wiki/Methoxychlorhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-43http://en.wikipedia.org/wiki/Cyclodienehttp://en.wikipedia.org/wiki/General_Use_Pesticidehttp://en.wikipedia.org/wiki/General_Use_Pesticidehttp://en.wikipedia.org/wiki/Endosulfanhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-44http://en.wikipedia.org/wiki/Cyclodienehttp://en.wikipedia.org/wiki/New_Zealandhttp://en.wikipedia.org/wiki/New_Zealandhttp://en.wikipedia.org/wiki/Clothianidinhttp://en.wikipedia.org/wiki/Neonicotinoidhttp://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-46http://en.wikipedia.org/wiki/Trichlorfonhttp://en.wikipedia.org/wiki/Permethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-35http://en.wikipedia.org/wiki/Pyrethroidhttp://en.wikipedia.org/wiki/Pyrethroidhttp://en.wikipedia.org/wiki/Small_hive_beetlehttp://en.wikipedia.org/wiki/Small_hive_beetlehttp://en.wikipedia.org/wiki/Parasitehttp://en.wikipedia.org/wiki/Beehive_(beekeeping)http://en.wikipedia.org/wiki/Cypermethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-36http://en.wikipedia.org/wiki/Anthttp://en.wikipedia.org/wiki/Cockroachhttp://en.wikipedia.org/wiki/Raid_(insecticide)http://en.wikipedia.org/wiki/Ant_chalkhttp://en.wikipedia.org/wiki/Fenvaleratehttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-37http://en.wikipedia.org/wiki/Resmethrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-38http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-39http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-40http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-41http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-42http://en.wikipedia.org/wiki/Methoxychlorhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-43http://en.wikipedia.org/wiki/Cyclodienehttp://en.wikipedia.org/wiki/General_Use_Pesticidehttp://en.wikipedia.org/wiki/General_Use_Pesticidehttp://en.wikipedia.org/wiki/Endosulfanhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-44http://en.wikipedia.org/wiki/Cyclodienehttp://en.wikipedia.org/wiki/New_Zealandhttp://en.wikipedia.org/wiki/New_Zealandhttp://en.wikipedia.org/wiki/Clothianidinhttp://en.wikipedia.org/wiki/Neonicotinoidhttp://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Federal_Ministry_of_Food,_Agriculture_and_Consumer_Protection_(Germany)http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-46 -
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pesticide seedtreatment products
used in oilseed rape
and sweetcorn, a fewweeks after honey
bee keepers in the
southern state of
Baden Wrttembergreported a wave of
honey bee deaths
linked to one of thepesticides,
clothianidin.[46]
Thiamethoxam Actara Neonicotinoid Clothianidin is a
major metabolite of
Thiamethoxam.
Highly
Toxic
Imidacloprid Confidor, Gaucho,
Kohinor, Admire,
Advantage, Merit,Confidor,
Hachikusan,
Amigo, SeedPlus(Chemtura Corp.),
Monceren GT,
Premise, Prothor,and Winner
Neonicotinoid (see also
Imidacloprid effects
on beepopulation)Bannedin France since
1999
highly
toxic
dicofol Acaricide Relativelynon-toxic
petroleum oils Relatively
non-toxic2,4-D[48] ingredient in over
1,500 products
Synthetic auxin
herbicide
Relatively
non-toxic
[49]
[edit] Common insecticides toxic to bees and used on soybeans
http://en.wikipedia.org/wiki/Oilseed_rapehttp://en.wikipedia.org/wiki/Sweetcornhttp://en.wikipedia.org/wiki/Baden_W%C3%BCrttemberghttp://en.wikipedia.org/wiki/Clothianidinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-45http://en.wikipedia.org/wiki/Imidaclopridhttp://en.wikipedia.org/wiki/Gauchohttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Acaricidehttp://en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acidhttp://en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acidhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-47http://en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acidhttp://en.wikipedia.org/wiki/Herbicidehttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-48http://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=5http://en.wikipedia.org/wiki/Oilseed_rapehttp://en.wikipedia.org/wiki/Sweetcornhttp://en.wikipedia.org/wiki/Baden_W%C3%BCrttemberghttp://en.wikipedia.org/wiki/Clothianidinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-45http://en.wikipedia.org/wiki/Imidaclopridhttp://en.wikipedia.org/wiki/Gauchohttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Imidacloprid_effects_on_bee_populationhttp://en.wikipedia.org/wiki/Acaricidehttp://en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acidhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-47http://en.wikipedia.org/wiki/Herbicidehttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-48http://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=5 -
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Many insecticides used against soybean aphids are highly toxic to bees.[50]
Orthene 75S (acephate)
Address 75 WSP (acephate)
Sevin (Carbaryl)
Lorsban 4E (Chlorpyrifos)
Dimate (Dimethoate)
Steward 1.25 SC (Indoxacarb)
Lannate (Methomyl) Cheminova Methyl 4EC (Methyl Parathion)
Penncap M (microencapsulated MethylParathion)
Tracer (Spinosad)
[edit] Highly toxic and banned in the US
Aldrinbanned by US EPA in 1974[51]
Dieldrinbanned by US EPA in 1974[52]
Heptachlor[53]
lindane, BHC(banned in California)
[edit] Lawsuit against the EPA in the United States
In August 2008, theNatural Resources Defense Council, aNew Yorkenvironmentaladvocacy group, filed a lawsuit against the federal Environmental Protection Agency accusin
the agency of withholding information about the risks pesticides pose to honeybees. [54]
Honeybee Love: Keeping Honeybees Safe While
Using Pesticides
by Genevieve on May 16, 2010
Weve all heard about theplight of the honeybees by now pesticides, hive infections, and other causes arecombining to make it a very hard time to be a honeybee.
If youre thinking to yourself that its not the worst thing in the world to have one less type of stinging insect
around remember honeybees are extremely sweet little critters, completely unlike wasps. Ive had to prune
plants that they were happily buzzing and swarming for the nectar, and they took my activities with a cheerfu
http://en.wikipedia.org/wiki/Insecticidehttp://en.wikipedia.org/wiki/Soybean_aphidhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-49http://en.wikipedia.org/wiki/Acephatehttp://en.wikipedia.org/wiki/Acephatehttp://en.wikipedia.org/wiki/Parathionhttp://en.wikipedia.org/wiki/Parathionhttp://en.wikipedia.org/wiki/Spinosadhttp://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=6http://en.wikipedia.org/wiki/Aldrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-50http://en.wikipedia.org/wiki/Dieldrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-51http://en.wikipedia.org/wiki/Heptachlorhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-52http://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-52http://en.wikipedia.org/wiki/Lindanehttp://en.wikipedia.org/wiki/Hexachlorocyclohexanehttp://en.wikipedia.org/wiki/Hexachlorocyclohexanehttp://en.wikipedia.org/wiki/Californiahttp://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=7http://en.wikipedia.org/wiki/Natural_Resources_Defense_Councilhttp://en.wikipedia.org/wiki/New_Yorkhttp://en.wikipedia.org/wiki/New_Yorkhttp://en.wikipedia.org/wiki/United_States_Environmental_Protection_Agencyhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-53http://www.guardian.co.uk/environment/2010/may/02/food-fear-mystery-beehives-collapsehttp://en.wikipedia.org/wiki/Insecticidehttp://en.wikipedia.org/wiki/Soybean_aphidhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-49http://en.wikipedia.org/wiki/Acephatehttp://en.wikipedia.org/wiki/Acephatehttp://en.wikipedia.org/wiki/Parathionhttp://en.wikipedia.org/wiki/Spinosadhttp://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=6http://en.wikipedia.org/wiki/Aldrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-50http://en.wikipedia.org/wiki/Dieldrinhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-51http://en.wikipedia.org/wiki/Heptachlorhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-52http://en.wikipedia.org/wiki/Lindanehttp://en.wikipedia.org/wiki/Hexachlorocyclohexanehttp://en.wikipedia.org/wiki/Californiahttp://en.wikipedia.org/w/index.php?title=Pesticide_toxicity_to_bees&action=edit§ion=7http://en.wikipedia.org/wiki/Natural_Resources_Defense_Councilhttp://en.wikipedia.org/wiki/New_Yorkhttp://en.wikipedia.org/wiki/United_States_Environmental_Protection_Agencyhttp://en.wikipedia.org/wiki/Pesticide_toxicity_to_bees#cite_note-53http://www.guardian.co.uk/environment/2010/may/02/food-fear-mystery-beehives-collapse -
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spirit. In 14 years of gardening professionally, I have never once been stung by a honeybee, even though Ivesheared, lopped, and pruned shrubs and flowers they were drinking from.
If thats not enough keep in mind, our food supply still gets pollinated the old-fashioned way, with insects
and lots and lots of honeybees. A drastic reduction in their numbers means terrible things for our plates. A
Cornell University study estimated that every third bite of food in America is pollinated by honeybees.
What can you do? While we dont know all the causes of their problems, a couple of things are certain to help
We can be mindful of the pesticides we use, even the organic ones, and we can plant things in our gardens thaprovide nectar and pollen for them to eat. Today well talk about which pesticides you can use to kill the bad
bugs while keeping honeybees alive and well.
Pesticides that harm honeybees
Some common pesticides you may have that are toxic to bees:
Orthene (Acephate)
Seven (Carbaryl)
Diazinon (Spectracide, others)
Bayer systemic (Imidacloprid), which gets into the pollen, may cause disorientation and death in bees
Ambush, Pounce (Permethrin)
Crossfire, Raid Flying Insect Killer (Resmethrin)
Safe only if sprayed at dawn or dusk, when bees arent active
These pesticides can hurt bees when wet, but arent harmful when dry, so if you use with care, can be bee-safe:
Spinosad (insecticide)
Pyrethrum (insecticide)
Neem oil (fungicide, insecticide)
Honeybee-safe pesticides
While its not nice to spray while bees are around, these are fairly non-toxic to them:
Sulfur (fungicide)
Serenade (biological fungicide)
Insecticidal soap
Petroleum-based oils
B.T. or Bacillus thuringiensis (biological control for caterpillars)
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Herbicides like Roundup and 2,4-D (though I much preferorganic herbicides)
Of course,prevention of pestsandattraction of beneficialsusing plants can also help reduce the need forpesticides, as can the use of biological controls and beneficials, likehypoaspis miles mites for thripsor
ladybugs or lacewings for aphids.
Other tips for keeping bees safe while using pesticides:
When in doubt, dont spray anything thats in full bloom. Bees arent attracted to plants that are budded or are
at the point where their blossoms have dropped their petals.
Spray anything you need to in the very early morning or right before dark so that bees are already safely
home, and the pesticide can dry before bees come into contact with them.
Careful not to contaminate the water that bees drink! Dont dump out your leftover pesticide in a way that
leaves a puddle that bees might drink from.
Use less-toxic formulations: Dusts are more hazardous to bees than liquids, and if you see any of the new
micro-encapsulated formulas, just avoid them. These tiny capsules are the same size as pollen spheres, so arecarried back to the colony and shared.
If youve got something thats particularly attractive to bees right next to your problem plant, consider not
spraying or holding off till the other plant is no longer in bloom.
One last note a big portion of the problem for honeybees also comes from agricultural uses, so eating
organic really helps. In particular, the pesticides used on non-organic soy cause problems to honeybees.
1
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Pesticides and Honey Bees
Toxicity of pesticides. Many materials that are used to control insects, weeds, and plant
diseases are toxic to honey bees. These pesticides are placed in three groups in relation to thei
effects on bees. Highly toxic** materials are those that kill bees on contact during application
and for one or more days after treatment. Bees should be moved from the area if highly toxic
materials are used on plants the bees are visiting. Among the materials in this group are the
foilsmang:
(Trade -name and/or common name)
aldrinAmbush, permethrinarsenicalsAvermectinAzodrin, monocrotophosBaygon, propoxurBaytex, fenthionBidrin, dicrotophosBux, bufencarbcarbosulfan, FMC- 35001Cygon, dimethoateCythion, malathion
Dasanit, fensulfothionDDVP, dichlorvosDibrom, naled*Decis, decamethrinDe-Fend, dimethoatediazinon, SpectracidedieldrinDimecron, phospliamidonDursban, chlorpyrifosEkamet, ctrimfosEPNEthyl Gutbion, azinphos- ethy
Famophos, famphurFicam, bendiocarbFolithion, fenitrothionFuradan, carbofuranGardona, tetrachlorvinphos
Guthion, azinphos-methylheptachlorImidan, phosmetLannate, methomylLorsban, chlorpyrifosmalathionMatacil, aminocarbMesurol, methiocarbmethyl parathionMonitor, methamidophosNemacur, fenamiphosNudrin, methomyl
Orthene, acephateparathionPay-Off, flucythrinatePhosdrin, mevinphos*Pounce, permethrinPydrin, fenvalerateSevin, carbarylSpectracide, diazinonSurnithion, fenitrothionSumithrin, d-phenothrinSupracide, methidathionSynthrin, resmethrin
Tamaron, methamidophosTemik, aldicarbtepp*Vapona, dichlorvos
*Short residual activity. Can usually be applied safety when bees are not in flight. Do not apply
over hives.
Moderately toxic** materials can be used with limited damage to bees if they are not applied over bees in the
field or at the hives. Correct dosage, timing, and method of application are essential. This group includes thefollowing:
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(Trade name and/or common name)
Abate, temephosAgritox, trichloronateBolstar, sulprophosCarzol, formetanate hydrochloridechlordane
Ciodrin, crotoxyphosCounter, terbufosCroneton, ethiofencarbCuracron, profenofosDDTDi-Syston, disulfotonDyfonate, fonofosendrinKorlan, ronnel
Larvin, thiodicarbMetasystox-R, oxydemethon- methylMocap, ethopropPerthane, ethylanPyramat
Sevin 4-Oil, carbarylSevimol, carbarylSystox, demeton
Thimet, phorateThiodan, endosulfanTrithion, carbophenothionVydate, oxamylZolone, phosalone
The greatest number of materials are included in the relatively nontoxic group.** These pesticides can be use
around bees with few precautions and a minimum of injury to bees. The following list includes some of thematerials in this group:
Insecticides and Acaricides (trade name and/or common name)
Acaraben, chlorobenzilatealletbrin, PynaminAltosid, methopreneBaam, amitrazBacillus thuringiensis, Bactur Bactospeine, Bakthane, Dipel,
ThuricideBirlane, chlorfenvinphosDelnav, dioxathionDessin, dinobutonDimilin, diflubenzuronDylox, trichlorfon ethionFundal, chlordimeformGalecron, chlordimeformHeliothis polyhedrosis virusKelthane, dicofol
Mavrik, fluvalinatemethoxychlor, MarlateMitac, amitrazMorestan, oxythioquinoxMorocide, binapacryl
Murvesco, fensonnicotinePentac, dienochlorPlictran, cyhexatinpyrethrum (natural)rotenonesabadillaSevin XLR, carbaryl
Tedion, tetradifonTorak, dialifortoxaphene
Fungicides (trade name and/or common name)
Benlate, benomylBordeaux mixtureBravo, chlorothalonilcaptancopper oxychloride sulfateCyprex, dodinecupric hydroxide, Kocide
Du-Ter, fentin hydroxideDyrene, anilazineferbamglyodinKarathane, dinocapMorestan, oxythioquinoxMylone, dazomet sulfur
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Difolatan, captafolDithane M-22, manebDithane Z-78, zineb
Vitavax, carboxinziram, Zerlate
Herbicides, Defoliants, and Desiccants (trade name and/or common name)
AAtrex, atrazineArniben, chlorambenAnimate, AMSBalan, beriefinBanvel, dicambaBladex, cyanazine2,4-Ddinoseb, dinitrobutylphenolHyvar, bromacilKerb, pronamide
Lasso, alachlorLorox, linuronPrarnitol, prometonPrincep, simazineProwl, pendimethalinSencor, metribuzinSurflan, oryzalinSutan+, butylate
Telvar, monuronTreflan, trifluralin
**Information extracted from Division of Agricultural Sciences, University of California, Leaflet 2883,
February 1981, entitled "Protecting Honey Bees from Pesticides."
Pesticides damage colonies in several ways. Most often the), kill the field bees without other effects on thecolony. In some instances the bees die in large numbers after returning to the hive Many bees are also lost in
the field and the colony is weakened but not usually killed. Sometimes materials are carried by the bees to the
hive where they kill brood, young bees, or the entire colony. Encapsulated pesticides, such as Penncap-M,
have this potential of being carried to the hive.
Methods of application. Losses from pesticides can be minimized by cooperation among beekeepers,
farmers, and spray operators. Several basic principles should be followed to prevent losses of bees and to
avoid injury to people and farm animals. The first of these is to apply the proper dosages and follow the
recommendations on the label. The method of application is also a factor to consider. Ground application isgenerally safer than air application. The material and its formulation play important roles in its toxicity to
bees. In general, sprays are safer than dusts, and emulsifiable concentrates are less toxic than wettable
powders. Materials applied as granules are the least hazardous. At present there are no safe, effectiverepellents that can be used to keep bees away from treated areas.
Proper timing of applications of pesticides allows the use of moderately toxic materials on crops visited by
bees. Bees visit different crops at different times and for different periods during the day. The timing of
treatment of a crop should relate to these bee visits. Squashes, pumpkins, and melons are attractive to beesearly in the day but close their blossoms in the afternoon. Afternoon and evening treatments, after the flowers
close, are safest for bees. Sweet corn sheds pollen early and is visited by bees most heavily in the morning.
Applications of insecticides to sweet corn are least dangerous when made as late as possible in the day,especially if the insecticide is kept off the tassels. For most crops, pesticide applications are safest for bees if
they are made between 7 p.m. and 7 a.m.
Table 1. Relative toxicity of pesticides to honey beesdetermined by laboratory and field tests.
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(CALIFORNIA, 1950 through 1980) (Number-keyed notes on their uses can be found at the end othis section)
Group 1 -- Highly toxic:Severe losses may be expected if used when bees are present at treatment time or within a daythereafter, except where noted to the contrary.
-------------------------------------------
Pesticides (trade name and/or common name)-------------------------------------------aldrin2
Ambush?2,18, permethrinarsenicals 1,2
Asana?, esfenvalerate
Avermectin?17
Azodrin?1,2, monocrotophos
Baygon?2, propoxur
Baytex?2, fenthion
Bidrin?1,2, dicrotophos
Bux?, bufencarbcarbosulfan 2, FMC-35001
Cygon?2, dimethoateCythion?2,4, malathion
Dasanit?5, fensulfothion
DDVP?2, dichlorvos
Dibrom?2,3, naled
Decis?2, decamethrin
De-Fend?2, dimethoate
diazinon 2, Spectracide?dieldrin 1,2
Dimecron?2, phosphamidon
Dursban?2, chlorpyrifos
Ekamet?, etrimfosEPN 1,2
Ethyl Guthion?, azinphos-ethylFamophos?, famphur
Ficam?, bendiocarb
Folithion?, fenitrothion
Furadan?2,5, carbofuran
Gardona?1,2, stirofos
Guthion?1,2, azinphos-methylheptachlor 1,2
Imidan?2, phosmet
Lannate?2, methomyl
Lorsban?, chlorpyrifosmalathion 2,4
Matacil?, aminocarb
Mesurol?, methiocarbmethyl parathion 1,2,11,12
Monitor?2, methamidophos
Nemacur?5, fenamiphos
Nudrin?2, methomyl
Orthene?2, acephateparathion 1,2
Pay-Off?
Phosdrin?1,2,3, mevinphos
phosphamidon 2, Dimecron?
Pounce?2,18, permethrin
Pydrin?2, fenvalerate
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resmethrin, Synthrin?
Sevin?2, carbarylSpectracide 2, diazinon
Sumithion?, fenitrothion
Sumithrin?, d-phenothrin
Supracide?2, methidathion
Tamaron?2, methamidophos
Temik?1,2,5,7, aldicarbtepp 1,2,3
Vapona?2, dichlorvos TM-------------------------------------------
Group II -- Moderately toxic:Can be used around bees if dosage, timing, and method of application are correct, but should notbe applied directly on bees in the field or on the hives.
--------------------------------------------------Insecticides (trade name and/or common name)--------------------------------------------------
Abate?2, temephosAgritox?, trichloronate
Bolstar?, sulprophos
Carzol?2, formetanate hydrochloridechlordane 2
Ciodrin?, crotoxyphos
Counter?, terbufos
Croneton?, ethiofencarb
Curacron?, profenofosDDT 1,2,10
Di-Syston?1,2,6,18, disulfoton
Dyfonate?, fonofosendrin 1,2
Korlan?, ronnelLarvin?2, thiodicarb
Metasystox-R?2, oxydemeton-methyl
Mocap?, ethoprop
Perthane?, ethylan
Pyramat?
Sevin?4-Oil2, carbaryl
Sevimol?2, carbaryl
Syston?1,2,18, demeton
Thimet?1,2,6, phorate
Thiodan?2, endosulfan
Trithion?2, carbophenothion
Vydate?
2, oxamylZolone?, phosalone--------------------------------------------------
Group III -- Relatively nontoxic:Can be used around bees with minimum injury.
-------------------------------------------------------------Insecticides and Acaracides (trade name and/or common name)-------------------------------------------------------------
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Acaraben?, chlorobenzilate
allethrin, Pynamin?
Altosid?17, methoprene
Baam?, amitraz
Bacillus thuringiensis 17, Bactur?
Bactospeine?, Bakthane?, Dipel?, Thuricide?
Birlane?, chlorfenvinphos
Comite?, propargite
cryolite 2, Kryocide?
Delnav?, dioxathion
Dessin?, dinobuton
Dimilin?17, diflubenzuron
Dylox?2, trichlorfonethion
Fundal?, chlordimeform
Galecron?, chlordimeformHeliothis polyhedrosis virus
Kelthane?1, dicofol
Mavrik?2, fluvalinate
methoxychlor 2, Marlate?
Mitac?, amitraz
Morestan?, oxythioquinox
Morocide?, binapacrylMurvesco?, fensonnicotine 2
Omite?, propargite
Pentac?, dienochlor
pirimor?2, pirimicarb
Plictran?2, cyhexatinpyrethrum (natural)rotenone 2sabadilla 2
Sayfos?, menazon
Sevin?, SL2, carbaryl
Sevin?SLR2, carbaryl
Smite?, sodium azideTedion?, tetradifon
Tetram?
Tokuthion?, prothiophos
Torak?, dialifortoxaphene 1,2
Zardex?, cycloprate
-------------------------------------------------------------Fungicides (trade and/or common name)-------------------------------------------------------------
Afugan?2, pyrazophos
Arasan?, thiram
Bayleton?, triadimefonBenlate?, benomylBordeaux mixture 2
Bravo?, chlorothalonilcaptan 11copper oxychloride sulfatecopper 8-quinolinolatecopper sulfate
cuprex?, dodinecupric oxide
cupric hydroxide, Kocide?
Delan?, dithianon
Dessin?, dinobuton
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Difolatan?, captafol
Dithane?D-14, nabam
Dithane?M-22, maneb
Dithane?M-45, manzeb
Dithane?Z-78, zineb
Du-Ter?, fentin hydroxide
Dyrene?, anilazineferbamglyodin
Hinosan?, edifenphos
Indar?, butrizol
Karathane?, dinocap
Lesan?, fenaminosulf
Morestan?, oxythioquinox
Morocide?, binapacryl
Mylone?, dazomet
Phaltan?, folpet
Plantvax?, oxycarboxin
Polyram?, metiram
Ridomil?
Sisthane?, fenapanil
Smite?, sodium azide
sulfur 2Thiram, Thylate?Thyfural
Vitavax?, carboxin
ziram, Zerlate?
-------------------------------------------------------------Herbicides, Defoliants, and Desiccants (trade and/or common name)-------------------------------------------------------------
Aatrex?, atrazineAlachlor
Alanap?, naptalam
Alopex?, clofop-isobutyl
Amex?820, butralinAmiben?, chlorambenamitrole
Ammate?, AMS
Aquathol K?, endothall, dipotassium
Avenge?, difenzoquat
Balan?, benefinBanvel, dacamba
Basagran?, bentazon
Basalin?, fluchloralin
Betanal?, phenmedipham
Betanex?, desmedipham
Bladex?, cyanazine
Blazer?, acifluorfenbutachlorbutamcacodylic acid 1
Cambilene?1, 2.3.6-TBA
Caparol?, prometryn
Casoron?, dichlobenil
Chloro IPC?, chlorprophamCotoranr, fluometuron2,4-D 1,2
DEF?8
Desiccant L-10?1,9, arsenic acid
Devrinol?, napromamide
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Dichlorprop 1, 2.4-DPdinoseb 9, dinitrobutylphenoldiquat 8,9
Dual?, metalachlor
endothall, sodium salt, Accelerate?
Eptam?, EPTC
Eradicane?, EPTC+safener
Evik?, ametryn
Evital?, norflurazon
Folex?1,8, merphos
Garlon?, triclopyr
Goal?, oxyfluorfen
Hoelon?, diclofop-methyl
Hydrothol 191?, endothallmonopotassium salt
Hyvar?, bromacil
Igran?, terbutryn
IPC?, propham
Karmex?, diuron
Kerb?, pronamide
Lasso?, alachlor
Lorox?, linuron
Maloran?, chlorbromuronMCPA 1
Methar?1, DSMA
Milogard?, propazine
Modown?, bifenoxMSMA 1
Mylone?, dazomet
Nortron?, ethofumesate
Paarlan?, isopropalinparaquat 1,9
Planavin?, nitralin
Pramitol?, prometon
Preforan?, fluorodife
princep?, simazineProbe?, methazole
Prowl?, pendimethalin
Ramrod?, propachlor
Randox?, CDAA
Ronstar?, oxydiazon
Roundup?, glyphosate
Sancap?, dipropetryn
Sencor?, metribuzinsilvex 1, 2.4.5-TP
Sinbar?, terbacil
Smite?, sodium azide
Surflan?, oryzalin
Sutan?+, butylate2.4.5-T 1,2
Telvar?, monuron
Tenoran?, chloroxuron
TOK?, nitrofen
Tolban?, profluralin
Tordon?, picloram
Treflan?, tribluralin
Turf Herbicide?, endothall, disodium
Vegadex?, CDEC
Zorial?, norflurazon
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-------------------------------------------------------------Nematicides and Miscellaneous (trade and/or common name)-------------------------------------------------------------
endothall 13
Exhalt?800 14gibberellic acid 13
Mocap?5, ethoprop
Mylone?5, dazomet
N-Serve?15, nitrapyrin
Polaris?16, glyphosine
Smite?5, sodium azideSustar?13,16
-------------------------------------------------------------
Number-keyed Notes on Pesticide Use
1. California state regulations require permits for most uses of these chemicals, also for 2,4-Dand 2,4,5-T as herbicides but not as sprays on citrus.
2. Laboratory- and field-tested mainly on alfalfa, citrus, cotton, ladino clover, milo and sweetcorn; all other chemicals were laboratory-tested only.
3. Dibrom?, Phosdrin?, and tepp have such short residual activity that they kill only beescontacted at treatment time or shortly thereafter. Usually safe to use when bees are not inflight; not safe to use around colonies.
4. Malathion has been applied on thousands of acres of alfalfa in bloom without serious lossof bees. However, occasional heavy losses have occurred, particularly under hightemperature conditions. If applied to alfalfa in bloom it should be only as a spray, andapplication should be made during the night or early in the morning when bees are notforaging in the field. Undiluted technical malathion spray (ULV) should not be used aroundbees.
5. Nematicide.
6. Di-Syston?(disulfoton) and other systemic pesticides used as seed treatments have notcaused bee losses.
7. Temik?(aldicarb), although highly toxic to bees as a contact poison, is used only in granulaform, and extensive field usage has not caused bee losses.
8. Defoliant.9. Desiccant.10.DDT has been withdrawn for most uses in U.S.A.11.Field doses have caused brood damage.
12.The microencapsulated formulation of methyl parathion, known as Penncap-M?is highlytoxic to foraging bees, young hive bees, and brood. Overall, it is 13 times more hazardous
to honey bees than the EC (emulsifiable concentrate) formulation. Penncap-M?is toohazardous to be applied to any area or within 1 mile of any area where and when bees arepresent.
13.Plant growth regulator.14.Sticker/extender.15.Nitrification inhibitor.16.Chemical ripener.17.Insect growth regulator.18.Honey bee repellent.
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19.The following groups found in Table 6-1, Relative Toxicity of Pesticides to Honeybees, (chemicalsused with fruit crops) show the relative toxicity of pesticides to honeybees as determined by laboratory
and field tests.
Table 6-1. Relative Toxicity Of Pesticides To Honeybees
Group I - Pesticides Highly
Toxic to Bees
Group II - Pesticides
Moderately Toxic to Bees
Group III - Pesticides Relative
Non-Toxic to Bees
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Severe losses may be expected ifthe following materials are used
when bees are present at
treatment time or within a few
days thereafter:
Admire
Agri-Mek 1.9EC
APM 50W InstapakCygon 480Cymbush 250 EC
Decis 5EC
Diazinon 500 EDiazinonI 50W
DZN 600 WDG
Furadan 480FGuthion Solupak
Imidan 50 WP
Lorsban 4E
Malathion 25WMatador 120EC
Parathion 15W
PouncePyramite
Ripcord 400EC
Sevin XLR PlusSuccess 480 SC
Sniper
Sniper 240 EVydate
These can be used around bees ifdosage, timing, and method of
application are correct, but do not
apply them directly on bees, in
the field or at the colonies:
Carzol SP
Dikar
Endosulfan 50WLannate T-N-GMetasystox R 240EC
Nustar
Pirimor 50DFThiodan 4EC
Thiodan 50WP
Zolone
Aliette WDGApollo SC
Benlate T-N-G
Bioprotec CAF
Botran 75WBravo 500
Captain 80 WDG
Confirm 240F
Copper 53WDipel 2X DF
Dithane DGDithane M45
Elevate 50 WDG
Equal 65 WP
Ferbam 76 WDGFolpan 50WP
Foray 48BA
Funginex 190 ECGavel 75 DF
Kelthane 50WKumulus DFManzate 200 DF
Manzate 200 WP
Maestro 80 DFMitac W
Nova 40W
Penncozeb 75DF
Polyram DFRidomil Gold 480 EC
Ridomil Gold MZ
Ridomil CopperRonilan EG
Rovral
Senator 70WPStreptomycin 17
Topas 250E
Vangard 75EG
Zineb 80W
20.Extremely Toxic to Bees21. FURADAN 480F
22. This insecticide has caused more loss (confirmed cases of poisoning) to bees in Ontario than any otherof the materials mentioned in this publication. Fruit growers and apiarists require close liaison when
and where Furadan is used.23. For more detailed information on the toxicity of specific pesticides to honeybees refer to the pesticide
label.