This is a common misconception. Every culture faces multiple classes of pests: virii, fungus, bacterias, nematods, insects, rodents, birds... What is good to

This is a common misconception. Every culture faces multiple classes of pests: virii, fungus, bacterias, nematods, insects, rodents, birds... What is good to control a pest can be beneficial to another since they compete for the same resource. In the intensive context of monoculture, losing a battle often means losing the war.