Question

why is the pesticide treadmill problematic?
farmers must increase the amount of pesticide the next time they spray for pests.
farmers must decrease the amount of pesticide next time they spray for pests.
farmers must always use the same pesticides as every other farmer on the treadmill.
farmers can never change pesticides once the treadmill is activated.

Explanation:

The pesticide treadmill occurs when pests develop resistance to pesticides, so farmers have to increase the pesticide dosage in subsequent applications to achieve the same pest control effect. The first option correctly describes this: farmers must increase the pesticide amount next time they spray. The second option is incorrect as they need to increase, not decrease. The third is wrong because farmers don't have to use the same pesticides as others. The fourth is incorrect as farmers can change pesticides (though resistance may still be an issue, but the statement is factually wrong about never being able to change).

Answer:

A. Farmers must increase the amount of pesticide the next time they spray for pests.