Question

what term is used to describe a phenomenon in which pests become resistant to a pesticide over time - making farmers apply more and more pesticide each time they spray? chlorinated hydrocarbons pesticide treadmill

Explanation:

The term "pesticide treadmill" describes the situation where pests develop resistance to pesticides over time, leading farmers to apply increasing amounts of pesticides. Chlorinated hydrocarbons are a type of pesticide, not the term for this resistance - related phenomenon.

Answer:

Pesticide treadmill