A farmer uses triazine herbicide to control pigweed in his field.For the first few years,the triazine works well and almost all the pigweed dies;but after several years,the farmer sees more and more pigweed,no matter how often he applies triazine.Which of these actions is most likely to solve the farmer's problem?

Question

Quizplus · Accepted Answer

The farmer's problem is most likely due to the pigweed developing resistance to triazine herbicide. Using a different herbicide with a different mode of action is the best choice to control the resistant pigweed. Options A, C, and D are unlikely to solve the problem as they involve using more or the same herbicide that the pigweed has already developed resistance to.

A Farmer Uses Triazine Herbicide to Control Pigweed in His