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Pesticides: Choose Your Poison What are pesticides?

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Presentation on theme: "Pesticides: Choose Your Poison What are pesticides?"— Presentation transcript:

1 Pesticides: Choose Your Poison What are pesticides?

2 What are pesticides? Pesticides are by definition poisons Designed to kill undesirable plants, insects, plant ___________________________, or other undesirable pests If used ___________________, pesticides can injure or kill desirable organisms

3 Pesticides Types of pesticides ___________________: kill insects Sevin, Rotenone Fungicides: kill fungi Bravo Herbicides: kill _________________ Roundup Limit use of pesticides to those crops that would otherwise be seriously damaged by insects and diseases

4 Pesticide label

5 Information on pesticide label Key warning words Caution –related to the acute toxicity of the pesticide “Restricted Use Pesticide” – use only by certified applicators Type of pesticide Active ingredient – material that kills the pest Inert ingredients What are these? Do not have to be disclosed

6 The Label is the Guide to Properly Handling of Pesticides Carefully follow directions on the pesticide label Wear protective clothing Store pesticides in a _________________ area that children cannot access

7 The Label is the Guide to Properly Handling of Pesticides Dispose of pesticides and empty containers properly Re- _____________ time: the amount of time to wait after applying a pesticide before you can enter your garden

8 Pesticide Exposure and Toxicity The effect of a pesticide on you is dependent on the toxicity of the pesticide and your exposure ________________ : a combination of toxicity and exposure Toxicity Introduction __________________ capacity of a material to produce death or injury

9 Pesticide Exposure and Toxicity Introduction to toxicity (continued) All materials are toxic at some ___________________________ If handled properly, pesticides will not cause injury Two types of toxicity _______________ toxicity

10 Pesticide Exposure and Toxicity Acute toxicity Injury that occurs soon after exposure to a pesticide Pesticide “ ___________________ ” on the skin would be an example of acute toxicity LD 50 : dose required to kill ___________ % of laboratory test animals

11 Pesticide Exposure and Toxicity Warning Indicators on Label Highly toxic pesticides Contain a drawing of a _______________ and crossbones Danger: Poison _________________________ toxic pesticides Warning Slightly toxic pesticides Caution

12 Pesticide Exposure and Toxicity Chronic toxicity Injury that occurs after _________________-term exposure to a pesticide _________________ developing many years after exposure to a pesticide is an example of chronic toxicity Other types of chronic toxicity Birth defects ___________________________ system effects Nervous system effects

13 Pesticide Exposure and Toxicity Exposure Your ____________________ with a pesticide. Depends on: Length of time How exposed to pesticide The most exposure to a pesticide will occur when handling or mixing a ________________________________ pesticide

14 Pesticide Exposure and Toxicity Methods of exposure __________________ Pesticide is ingested through a person’s mouth Dermal Exposure through a person’s skin Inhalation Exposure is through breathing in a pesticide through the ___________________

15 Organic vs. Synthetic Pesticides Organic Pesticides Definition: a pesticide made from a natural product that has undergone only a little ________________________ Just because the pesticide is derived from a “natural” source does not mean that it is not ____________________

16 Organic Pesticides Advantages ______________ persistence Are less harmful to beneficial insects Do not need ______________ for their production Disadvantages Some are very toxic They can be ____________________ Their effectiveness can vary They lack persistence

17 Synthetic Pesticides Definition: a pesticide synthesized from _____________________ derived materials Advantages Relatively inexpensive Are ___________________ Will persist Disadvantages May be harmful to beneficial organisms Potential for pesticide _____________________

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