troublesome pests in school buildings

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Troublesome Pests In School Buildings. IPM in Schools Program Contact: Jean Ciborowski, 651-297-3217 Minnesota Department of Agriculture. Funding provided by the MN Future Resources Fund as recommended by the Legislative Commission on Minnesota Resources. Ants Flies Mice/Rats Wasps - PowerPoint PPT Presentation


  • Troublesome PestsIn School BuildingsIPM in Schools Program Contact: Jean Ciborowski, 651-297-3217Minnesota Department of AgricultureFunding provided by the MN Future Resources Fund as recommended by the Legislative Commission on Minnesota Resources

  • Structural or Indoor Pests in Minnesota Schools AntsFliesMice/RatsWaspsHeadliceSilverfishSpidersCockroachesOther: centipedes, crickets, boxelder bugs, aphids, millepedes, bats, fruit flies, shrews

  • Sanitation any pest, all pestsSweep and mop floorsDrain all sinks and remove any food debrisVacuum and/or mop classrooms dailyPeriodically, clean food prep areas thoroughlydrains, vents, deep fat fryers and hard-to-reach areasRemove all food garbage from building dailyRinse recycling materialsSeal garbage in bags before placing in dumpster

  • Outdoor Waste ManagementNo garbage on groundPlace dumpsters upwind of outside doors, kitchen or cafeteria especiallyRemove wastes from site weeklyTwice/week during warmer weather (insects breed faster)Close lidsClean containers regularlyHigh pressure water or brush and soapy water. Borax and water to eliminate odorsHose or scrub out dumpsters with drains Flies can develop in soil soaked with dumpster rinse water

  • Non-Chemical Pest ManagementEntryScreenPatch cracksInspect incoming productsFoodVacuumDispose of garbageReplace decaying woodClimateMoistureClutterShelf paper

  • 4 steps of IPM

    InspectIdentifyTake action (action thresholds)Evaluate

  • If Chemical Treatment Is NeededFollow EPA approved label directionsUse Personal Protective Equipment as noted on labelMaintain a file of labels and MSDS (material data safety sheets)

  • AntsIn food areas, contaminate food; other areas, nuisanceIf not migrating into building, not detrimentalIf high numbers foraging into building, locate and treat outdoor nests Differ in habits and food preferencesMay build nest in soil, rotting wood, concealed areas outdoor or in buildingsFeed on starches, meats, fats or sweetsHoneydew from houseplant pestsBaits tempt workers into returning to nest with poisonous food Identify type to determine biology and most effective method of management

  • Ants in Minnesota schools Cornfieldlt to dk brown, workers ~ 1/10 long; very abundant outdoorsField AntsBlack, brown, red, or combo, workers ~ 1/8 to 1/4 longPavement Ants Reddish-brown to black; workers ~ 1/8 inch long Thief Antsyellow to light brown;workers ~1/20 long tend to curl up when die ID important; confused for Pharaoh antsPharaoh antslight yellow to red~ 1/16 longthorax on workers darker coloredPhoto by Jim Kalisch. UNL Entomology

  • Pharaoh AntsDo not survive outdoors. Nest in small spaces often near dark, warm sites near moisture source; very difficult to find. Produce new nests by budding. When colony too large or under stress, moves to new site Photo by Jim Kalisch. UNL EntomologyCan nest in any heated building; most commonly found in hospitals, nursing homes, schools, and apartments. Persistent numbers of very small ants in winter likely Pharaoh

  • Managing pharaoh ants usually requires experienced pest control companyInsecticides and household cleaning products can cause budding, create new colonies. Use of baits preferred, but homeowner products may not be effective Professionals have experience and more effective productsPhoto by Jim Kalisch. UNL Entomology

  • Ways to Reduce Ant ProblemsWeather strip around doors and windowsAlways carry caulk on inspections Use mildew resistant caulk in moist areas

    Begin caulking at access point of current ant trailVacuum ant trailsVacuum up a tbsp corn starch to kill ants in bagSpray with detergent and water

  • Techniques for Baiting Ants May require professional to identify species and habits Differ in food preference for baitingSweet, protein or oily attractantsFood preferences may change Differ in nesting and foraging habitsAffects bait acceptance and management techniquesIn dry areas, may prefer more moist baits Bait along foraging trails, but do not disturb trails between nest and baitPlace baits out of sight and REACH of childrenIf competition present, non-target ant may prevent target ant from feedingRemove bait stations when not needed or will attract cockroaches

  • Common Small FliesMoth fly (drain fly)1/12 long, dark-colored; long black hairs on wings and body, fuzzy moth-like appearanceFruit Flies1/16 to 1/8 long, red eyes, tan body, striped abdomenHumpbacked flyAlso called phorid flies: 1/8 long with humpbacked body; often found running along counters or wallsFungus gnats1/8 long with slender body and long legs

  • FliesMay contaminate food in prep or serving areasIn others areas, nuisance, but large numbers indicate sanitation problemEggs laid in food waste, kitchen drains, decomposing organic matter, ripe fruit and vegetables, fermenting water from refrigerators, humidifiers, spoiled animal food, damp sour mops or rags and other locations, including areas adjacent to building Identify flies to determine breeding sites and effective control measures

  • Where can flies can be found?drainsmoist, decaying organic matterfood residues in trasharound kitchen equipmentbottom of pet cages or potting soilslimy layer in floor drains and sinksnear sump pumps and broken sewage linesin soil of over-watered houseplants, or high organic soil

  • Reduce Fly PopulationsEat or refrigerate fresh foods no ripe (overripe) produce left out Separate food waste from other garbage, drain, store in sealed plastic bags before disposingFlush sink and floor drains regularly Rinse materials before recyclingKeep mops clean and dry

  • Mice/RatsNorway ratLarge, robust, blunt muzzle, small eyes, short rounded ears; 7-18 oz, adults up to 11 House mouseSmaller, more slender than Norway, eyes small, ears prominent, muzzle pointed; 1 oz or less, 3 long Deer mouseseasonal problem in fall and winter; ~ size as house mouse, but bicolored, white bellies and feet, large eyes

  • Mouse cluesSounds at night of squeaks, scrambling or gnawingDroppings Similar to large cockroaches and bats Urinepillars of grease, urine and dirt visible under blacklightGrease marks of dirt and oil from fur Runways, not easily detectableTracks footprints or tail marksuse nontoxic dust to help locate (talc)Gnawing damageSightingsNest sitesMouse odors

  • Rodent cultural practicesGood SanitationEliminate food, water and shelterExcludeIdentify and seal all entry pointsNever prop open doors or windowsTrim shrubs grass and vines and maintain a 12-18 gravel border adjacent to building foundations

  • Mouse Trap TipsRarely go more than 30 ft from nest, usually only 10 ftPlace snap traps in 3-D sphere about 10 ft in diameter around mouse signs Good climbers; live above or below food sources, ceilings or crawl spacesBest trapping sites where mice spend time Note droppings along walls, behind objects, dark cornersGood mouse baits -- peanut butter, bacon, cereal cotton ball for nest material May require professional assistance to deal with high mouse populationsA pair of mice can produce 50 offspring in one year

  • B ees and WaspsCharacteristicsBees: fuzzy, robust Wasps: Smooth skinned and shinyIdentify to learn biology and habits Wasp and bumble bee colonies live only 1 seasonOld queen and workers die in fall, new queens survive in protected sitesBuild new nest in spring; old nest not reusedHoney bee colonies perennial in same nest location

  • Sting ReactionsMild allergic: hives or rash, swelling in area away from sting, headache, minor respiratory/stomach upset, treat with antihistamineSevere: Anaphylactic shock, fainting, immediate difficulty breathing, swelling or blockage in throat Local: burning itching, redness, tenderness or massive swelling and itch. Ice or topical ointment, remove stinger

  • Caution! Wasps and BeesWill attack if physically threatened and to protect their nestsWear protective clothing bee veil and bee suit

    USE CAUTION!Photos by Jim Kalisch. UNL Entomology

  • Wasp NestsIf nest not a threat, wait for freeze Capture and release or swat individualsMay nest in ground, tree and shrubs, under horizontal surfaces such as eaves, in buildings in wall spaces

  • Treating Nests Exposed nests: apply Wasp and Hornet ready-to-use aerosol to entrance of nest. Repeat if live wasps foundGround nests and hidden nests may require applications of insecticide by professional pest control technicianIf nest entrance in wall void sealed before insects dead, insects will be forced indoorsProfessional can vacuum nest if in area where insecticides can not be used Do not pour gasoline or fuel oil in ground nestcontaminates environment, use soapy waterplug entrance hole with dirt after insects killed

  • CockroachesZero tolerance anywhereCan carry pathogens and cause problems such as salmonella and asthmaPrefer to be in warm, moist areas near food and water

  • Cockroach SpeciesGermanAdults live 6 months, each female produces 28 nymphs from an egg case, produces 4-8 egg cases, new generation every four weeksSmall, adults less than long, gold with two dark streaks behind the head. Requires moisture, usually found in kitchen or bath

    AmericanCan live two years, egg case 1-2 weeks, 20 to 80 egg cases with 15-20 nymphsGlue egg case to hidden, moist surfaceLarger and heavier, 1 to 1 long, reddish brown to black

  • Defeating CockroachesWatch damp areas or available water (Condensation under refrigerator) Store all food in sealed containers; remove garbage daily Remove boxes, newspapers, other clutterRinse and invert cups, glasses and soda Vacuum cockroaches and egg casesHEPA (high efficiency particulate air) filter to reduce airb