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OHIO STATE UNIVERSITY EXTENSION

On Beyond Chemistry:

A Pesticide Primer for Master Gardeners

Ann ChanonAshley Kulhanek

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WHAT AREPESTICIDES?

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Pesticides….• -icide

• = TO KILL!

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Natural? Synthetic?

Are pesticides natural?

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Pesticides can be….

• ORGANIC - OMRI

• SYNTHETIC

• NATURAL

• COMMERCIAL

• CONSUMER

• Restricted Use (RUP)

• Over The Counter

(OTC)

• Ready To Use (RTU)

• All are intended to be harmful

• ALL require Caution!

• Let’s Reduce our Risks!

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Easy to become complacent about pesticides…

• It’s sold in stores it must be safe.

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Easy to become complacent about pesticides…

• Ready to Use = Safe

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Easy to become complacent about pesticides…

• If I can use it on green grass, I can use it on green beans.. NO!

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Easy to become complacent about pesticides…

• ”Been doing this for years”

• “Heard it all before…”• “this is just common

sense”

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Easy to become complacent about pesticides…

• Out of Time

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What are we Protecting?

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Responsible Use of PesticidesBegins With…

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1) Identify the Problem Correctly Anyone

know what this is?

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2) Identifying Integrated Pest Management Strategies

Prune?Air Flow?Host Selection?

BIOLOGICAL

CULTURAL

CHEM

ICAL

MONITOR

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2) Identifying Integrated Pest Management Strategies

Prune?Air Flow?Host Selection?

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3) Chemical Options if Necessary

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Chemical Options Require

1. Select proper product

2. Wear proper protection

3. Apply responsibly in

accordance with label

4. THE LABEL IS THE LAW-

read it carefully

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BUT WE KNOW…

Sometimes Chemical Controls are Necessary

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Where Chemical Controls May Be

Necessary

Wikimedia Commons: Richerman at en.wikipedia

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• Furanocoumarins = Phyto-Photo-Dermatitis

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Where Chemical Controls May Be

Necessary

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READ LABEL: Label is Law“It is a violation of Federal law to use this product in a manner inconsistent with it’s labeling”

Use that’s “inconsistent with the label” may result in penalties under state or federal law

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“INCONSISTENT” with the label

You cannot:•Use on a site that is not on the label•Use higher rates•Use at more frequent intervals•Ignore directionsDisregard protective equipment

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THE LABELTHINGS TO LOOK FOR

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HOST and PEST

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What’s Missing?

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LABEL: Make sure it’s the proper product

• “My neighbor told me to get roundup for that weed…”

• SOOO which one are you gonna pick?

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APPLICATION Frequency and Timing

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TIMING- for RAIN& BEES

FREQUENCY RESTRICTIONS

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TEMPER

ATUR

E

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LOOK FOR:

Active Ingredients

Active ingredient(s) (AI) compound that controls pests

Inert ingredients (Other) often not specified

surfactants

wetting agents

water and/or petroleum

filler

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FORMULATIONS

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More formulation considerations

HERBICIDES:

- Contact versus Systemic- CONTACT = burn down. Only

kills green tissue that contacts chemical

- SYSTEMIC= transport. Goes from root to shoot.

- SELECTIVE = affects only certain plant types

- BROAD SPECTRUM = NON-SELECTIVE

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FACTSHEETS can guide you

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LABEL: Signal Words•Label Signal Words correspond to four toxicity categories•Most sensitive route of entry determines the Signal Word on the pesticide label•Immediate “poisoning” or harm•Acute toxicity symptoms show up in 24-48 hours or less

DANGERLD ≤50 mg/kg

I. Highly Toxic

WARNINGLD 50-500 mg/kg

II.ModeratelyToxic

CAUTIONLD 500-5000 mg/kg

III. Slightly Toxic

CAUTIONLD >5000 mg/kg

IV.PracticallyNon-toxic

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Pesticide Contamination

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Personal Protective Equipment (PPE)What’s wrong with these?

+ + + + ?

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PPE requirements on label

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WEAR PROTECTION

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What’s wrong?

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WHO YA GONNA CALL!????

Check Label BEFORE the emergency.

Can’t read if you get it in your eye.

Have a copy of label that can be presented to doctor in event of emergency

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Applying Safely also

protects environment

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Re-Entry Interval and Safety

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Use the measuring items THEY

CAME WITH. never your

home measure cup.

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QUESTIONS?

Go.osu.edu/10970