Why does a pesticide lose its effectiveness over time?

a
The pests become resistant.
b
The pesticide expires within a week of being sprayed.
c
The pesticide accumulates in the bodies of the pests.
d
The pests become contaminated.

1 answer

a. The pests become resistant.

Over time, pests can develop genetic resistance to certain pesticides through repeated exposure. This can reduce the effectiveness of the pesticide in controlling the pest population.
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