Question $3$

$10$ pts

Integrated pest management $($IPM$)$ uses a variety of techniques to reduce pest populations while reducing the economic damage caused by pests. Which of the following techniques is a chemical IPM method for reducing pests?

The use of screens or traps to prevent pests from entering the crop area

The use of monocultures to keep the population size of pest species low

The use of pesticides sprayed on fields to kill pests and keep population sizes low

The use of a predator or parasites to keep the population size of pest species low