WASHINGTON PESTICIDE LAWS AND SAFETY FINAL PAPER
2025/2026 QUESTIONS AND ANSWERS GRADED A+
✔✔amount or concentration of a toxicant required to kill 50% of a test
population of animals.
measured in milligrams of toxicant per Kilogram at body weight of the test animal -
✔✔LD50/LC50
✔✔1 Acer - ✔✔43560 square feet
✔✔1 square mile - ✔✔640 acres
✔✔REI - ✔✔Restricted Entry Interval
✔✔Application records must be kept for - ✔✔7 years
✔✔occurs when microorganisms such as fungi and bacteria use a pesticide as food. -
✔✔microbial degradation
✔✔Intake of all chemicals, soil moisture, and fertility by plants and microorganisms. -
✔✔Absorption
✔✔the binding of Chemicals to soil particles, - ✔✔Adsorption
✔✔Phytoxic - ✔✔A chemical that causes injury to plants
✔✔How far may bees travel from their hive - ✔✔3 miles
✔✔Wetable Powders - ✔✔pose a greater risk to bees because It can be easily carried
✔✔Residual Activity - ✔✔The ____ of a chemical is key in determining its danger to
bees
✔✔Summer annuals - ✔✔Plants germinate (sprout fram seed) in the spring and
summer. They grow, flower, seed, and die before winter.
The seeds lay dormant in the soil until the next spring, or several later, when the cycle
repeats itself.
✔✔winter annual - ✔✔Plants germinate in the late summer to early winter. They
overwinter in a
vegetative stage. In the spring and early summer, they flower,
seed, mature, and die, but live far less than one full year. The seeds lie dormant in
summer.
2025/2026 QUESTIONS AND ANSWERS GRADED A+
✔✔amount or concentration of a toxicant required to kill 50% of a test
population of animals.
measured in milligrams of toxicant per Kilogram at body weight of the test animal -
✔✔LD50/LC50
✔✔1 Acer - ✔✔43560 square feet
✔✔1 square mile - ✔✔640 acres
✔✔REI - ✔✔Restricted Entry Interval
✔✔Application records must be kept for - ✔✔7 years
✔✔occurs when microorganisms such as fungi and bacteria use a pesticide as food. -
✔✔microbial degradation
✔✔Intake of all chemicals, soil moisture, and fertility by plants and microorganisms. -
✔✔Absorption
✔✔the binding of Chemicals to soil particles, - ✔✔Adsorption
✔✔Phytoxic - ✔✔A chemical that causes injury to plants
✔✔How far may bees travel from their hive - ✔✔3 miles
✔✔Wetable Powders - ✔✔pose a greater risk to bees because It can be easily carried
✔✔Residual Activity - ✔✔The ____ of a chemical is key in determining its danger to
bees
✔✔Summer annuals - ✔✔Plants germinate (sprout fram seed) in the spring and
summer. They grow, flower, seed, and die before winter.
The seeds lay dormant in the soil until the next spring, or several later, when the cycle
repeats itself.
✔✔winter annual - ✔✔Plants germinate in the late summer to early winter. They
overwinter in a
vegetative stage. In the spring and early summer, they flower,
seed, mature, and die, but live far less than one full year. The seeds lie dormant in
summer.
