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OREGON PESTICIDE LAWS AND SAFETY 2025|
BRAND NEW ACTUAL EXAM WITH 100%
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
1. Residual insecticide - correct answer - insecticides that stay
active for a long time. Useful when an insect is a constant
problem
2. Non selective herbicides - correct answer - chemicals toxic to
all plants
3. Selective herbicide - correct answer - chemicals that kill
specific plants
4. Why timing of herbicide application? - correct answer - to effect
target without harming other plants
5. Msds physical and chemical properties - correct answer -
describes the products physicals appearance, how product
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behaves under certain conditions. Important for mixing,
storage, drift, leaching and runoff.
6. Soil koc - correct answer - soil organic carbon-water
partitioning coefficient. Useful in predicting the mobility of
pesticides. High koc less mobility lower koc more mobility.
Calculates soil concentration that protects groundwater
7. Msds - correct answer - provides technical information about
products hazards to workers and end users. Detailed
information about products composition, properties and
hazards, toxicological and ecological information and first aid
procedures
8. Emulsifiable concentrates ec/e - correct answer - 25-75%
active ingredient not soluble in water. Soluble in oil. Emulsifier
needed to mix in water. Adjutants needed (wetting agents,
spreader/stickers) advantages: penetrate waxy surfaces better,
low pressure needed. Drawbacks: highly concentrated,
phytotoxic, absorbed easily through the skin and hazardous to
handler.
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9. Solutions s - correct answer - active ingredient dissolve readily
in petroleum or water based solutions. When mixed with a
solvent they form a solution that does not settle out or
separate. Advantage: ready-to-use (rtu) no mixing, low
concentrate designed to be sprayed as purchased.
Disadvantage: costly for the amount of active ingredient, few
uses
10. Dusts (d) - correct answer - finely ground, dry mixture
combining a low concentration of the pesticide with an inert
carrier such as talc, clay, or volcanic ash. Ready to use as
purchased and require no mixing. May drift long distances. For
spot treatments and home gardens
11. Granules (g) - correct answer - dry, ready-to-use, low
concentrate mixtures of pesticide. In a granular formulation
each about the same size. Granules are ready to use as
purchased, little toxic dust to drift up, use seeders or fertilizer
spreaders. Dont stick to foliage
12. Wettable or soluble powders (wp or sp) - correct answer -
dry preparations containing a relatively high concentration of
pesticides. Dissolve in water to form solutions. Safer, dont
absorb through the skin as rapidly, easily measured and mixed.
Hazardous to the applicator if concentrated dust is inhaled.
OREGON PESTICIDE LAWS AND SAFETY 2025|
BRAND NEW ACTUAL EXAM WITH 100%
VERIFIED QUESTIONS AND CORRECT
SOLUTIONS| GUARANTEED VALUE PACK| ACE
YOUR GRADES.
1. Residual insecticide - correct answer - insecticides that stay
active for a long time. Useful when an insect is a constant
problem
2. Non selective herbicides - correct answer - chemicals toxic to
all plants
3. Selective herbicide - correct answer - chemicals that kill
specific plants
4. Why timing of herbicide application? - correct answer - to effect
target without harming other plants
5. Msds physical and chemical properties - correct answer -
describes the products physicals appearance, how product
, Page | 2
behaves under certain conditions. Important for mixing,
storage, drift, leaching and runoff.
6. Soil koc - correct answer - soil organic carbon-water
partitioning coefficient. Useful in predicting the mobility of
pesticides. High koc less mobility lower koc more mobility.
Calculates soil concentration that protects groundwater
7. Msds - correct answer - provides technical information about
products hazards to workers and end users. Detailed
information about products composition, properties and
hazards, toxicological and ecological information and first aid
procedures
8. Emulsifiable concentrates ec/e - correct answer - 25-75%
active ingredient not soluble in water. Soluble in oil. Emulsifier
needed to mix in water. Adjutants needed (wetting agents,
spreader/stickers) advantages: penetrate waxy surfaces better,
low pressure needed. Drawbacks: highly concentrated,
phytotoxic, absorbed easily through the skin and hazardous to
handler.
, Page | 3
9. Solutions s - correct answer - active ingredient dissolve readily
in petroleum or water based solutions. When mixed with a
solvent they form a solution that does not settle out or
separate. Advantage: ready-to-use (rtu) no mixing, low
concentrate designed to be sprayed as purchased.
Disadvantage: costly for the amount of active ingredient, few
uses
10. Dusts (d) - correct answer - finely ground, dry mixture
combining a low concentration of the pesticide with an inert
carrier such as talc, clay, or volcanic ash. Ready to use as
purchased and require no mixing. May drift long distances. For
spot treatments and home gardens
11. Granules (g) - correct answer - dry, ready-to-use, low
concentrate mixtures of pesticide. In a granular formulation
each about the same size. Granules are ready to use as
purchased, little toxic dust to drift up, use seeders or fertilizer
spreaders. Dont stick to foliage
12. Wettable or soluble powders (wp or sp) - correct answer -
dry preparations containing a relatively high concentration of
pesticides. Dissolve in water to form solutions. Safer, dont
absorb through the skin as rapidly, easily measured and mixed.
Hazardous to the applicator if concentrated dust is inhaled.
