Wisconsin Pesticide Applicator Practice Test

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Study for the Wisconsin Pesticide Applicator Test. Access multiple choice questions, each with hints and explanations. Prepare effectively and ensure your success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What does LD 50 measure?

Effectiveness of a pesticide on plant growth
Half-life of a pesticide in the environment
Level of toxicity required to kill half the test animals
Persistence of pesticide effects on target pests

The correct answer is: Level of toxicity required to kill half the test animals

LD 50 measures the "level of toxicity required to kill half the test animals." This is a standardized measure used to determine the potential harm or toxicity of a substance. It does not measure the effectiveness of a pesticide on plant growth (A), as it is only concerned with the impact on animals. It also does not measure the half-life of a pesticide in the environment (B), as this is a measure of how long it takes for half of the substance to degrade. LD 50 also does not measure the persistence of pesticide effects on target pests (D), as this would only be relevant for surviving pests, whereas LD 50 is concerned with determining harm or lethality.