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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
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
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
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
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
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
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 _______________ toxicity
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
LD50: dose required to kill ___________% of laboratory test animals
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
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
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
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 ___________________
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 ____________________
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