The evolution of pesticide resistance resurgence, and secondary-pest outbreaks are only some of the problems that result from reliance on

• A.  crop rotation and biological controls, which disrupt the natural dynamics of ecosystems.
• B.  pesticides, creating the need to alternate between a pesticide and an herbicide every other year.
• C.  rodenticides to kill weeds and insect pests and prevent the spread of viral diseases.
• D.  pesticides,  creating a never-ending pesticide treadmill requiring new pest-fighting strategies.