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What is a pesticide's half-life?

Last Updated: March 11, 2009

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A pesticide's half-life (also known as degradation) is the time it takes for half of the initial amount of a pesticide to breakdown. If a pesticide's half-life is 30 days, then half will be degraded in 30 days, one quarter in 60 days, one-eighth after 90 days, etc.

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