One of the major difficulties in the biological control of insect pests is the

Options

A. practical difficulty of introducing the predator to specific areas
B. method is less effective as compared with the use of insecticides
C. predator does not always survive when transferred to a new environment
D. the predator develops a preference to other diets and may itself become a pest

Answer

D

Explanation

The major difficulties in the biological control of insects pests is that the predator develops a preference to other diets and may itself become a pest. Biological control is mainly refers to the introduction of living organisms which destroy other harmful organisms.