Reeves Petroff Pesticide Education Specialist Montana Cooperative Extension Service. http://mtpesticides.org. Pesticide Safety. Toxicity Routes of exposure PPE 1 st Aid. What are pesticides?. -cides. Pesticides. Herbicides. Rodenticides. Insecticides. Toxicity of Pesticides.
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Pesticide Education Specialist
Montana Cooperative Extension Service
Toxicity – capability of a substance to cause injury or death.
Hazard = Toxicity x Exposure
Herbicides – developed to kill plants.
- Skin, eye damage
- sensitization, allergic
Insecticides – true poisons
- Cholinesterase inhibitor - irreversible
- Cholinesterase inhibitor - reversible
- 2 PAM chloride – restores function
Pesticide’s power to kill or cause serious damage to the body.
Acute toxicity - after a single exposure or dose.
Symptoms occur within minutes of the exposure or from 12 to 24 hours after the exposure has occurred.
Acute toxic effects are nearly always the result of an accident or careless handling.
Usually occurs with more toxic pesticides
Dose makes the Poison!
Testing determines “signal words”
Few drops to 1 Teaspoon to kill
Highly toxic or highly corrosive
Moderately toxic - 1 Teaspoon To 1 Tablespoon to kill
Occurs often with least toxic pesticides – people become careless due to low toxicity rating
What part of a pesticide operation is usually the most hazardous? Why?
What toxic effect is usually the result of an accident?
True or FalseA high LD50 means that something is very poisonous.
A compound with an oral LD50 of 0-20 would probably get which signal word?
True or False. LD50 is a good measure of chronic toxicity.
Usually a result of long-term chronic exposure
Anemia, no clotting
Liver and Kidneys
Rashes, sores that won’t heal
Jaundice, kidney failure
Influenced by genetics
Allergic reaction - Asthma or even shock, ---Skin irritation, rashes, blisters, or open sores. Eye, nose and throat irritation, such as itchy, watery eyes; sneezing and tightness in the throat,
Routes of Exposure
Where most pesticide exposures occur!
--Mixing --when pouring
EC = + absorption
--Mixing-- when pouring
Cuts, scrapes, hot ‘n sweaty
RemoveWashChangeDoctor if feeling ill
Can be confused with:
Symptoms may be delayed 12 – 24 hours after exposure
Sweating hazardous? Why?
No tears or spit
Loss of coordination
Salivation, spit, tears
Loss of coordinationHeat Injuries Look Like Pesticide Injuries
Is special PPE required?
Take the label to the hospital!
Do not induce vomiting unless the label directs it!
Only atropine is used to counteract the effects of what type of insecticide.
The onset of _______ symptoms within 12-24 hours of pesticide spraying may indicate pesticide poisoning
What Signal word best indicates the corrosive effects of a pesticide?
Most pesticide exposures are to what part of the body?
A-- Dry or water based pesticide formulation.
B---Pesticide with acetate as the carrier solvent.
C---Pesticide with alcohol as the carrier solvent.
D---Pesticide with halogenated hydrocarbons as the carrier.
E---Pesticide with ketones (acetone) as the carrier solvent.
Poast Plus®, Weedone 638®, 2,4-D LV 6 Ester®
F---Pesticide with ketone and aromatic petroleum distillate
mixtures as the carrier solvent. Example - Di-syston 8®
G---Pesticide with aliphatic petroleum distillates ( such as
kerosene, petroleum oil or mineral oil as the carrier solvent.
Example - Guthion 2L®
H---Pesticide carrier = aromatic petroleum distillates ( xylene)
PVC of insecticide.
Polyethylene coated Tyvek
BLM H-9011-1pg. II-6
Required for pouring or mixing
What does a respirator do?
A respirator filters out substances or blocks gases or vapors that can cause harm to the lungs (route of exposure)
Washing Pesticide Contaminated Clothing of insecticide.
INCLUDES PERSONAL PROTECTIVE EQUIPMENT
Any clothing or equipment used to apply pesticides should be considered to be contaminated and should be cleaned.
DO YOU HAVE THE LABEL ON HAND? of insecticide.
WHAT IS THE RELATIVE TOXICITY OF THE PESTICIDE?
Wear Gloves when handling contaminated clothing
ANY SPECIAL LAUNDERING INSTRUCTIONS ON THE LABEL?
Separate from other items of the family laundry. of insecticide.
Store in separate containers and mark them.
Does the person doing the laundry know?
Pre-treat – Wash in a bucket and hang on line to dry.
Use the rinse water for upcoming spraying activities
Maximum load setting - lots of circulation around clothing
No less than a 12 minute cycle.
Choose a heavy-duty liquid detergent.
Keep PPE as clean as possible. of insecticide.
Multiple laundering is recommended!Signal Word!
Clean the washer after use. Swab down the inside of the washer tub.
Run an empty cycle with detergent and hot water before the washer is used to launder family items.
T or F You should never wash pesticides in hot water. of insecticide.
T or F It is okay to wear contacts when spraying pesticides as long as you have other eye protection.
True or FalseEye protection is required for BLM applicators when mixing and pouring.
BLM policy requires that gloves used to handle pesticide be ___________.
What type of headgear is required of BLM applicators?
Pesticides are designed to kill something!
Don’t let it be you!