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

Options

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

Answer

A

Explanation

The predator develops a preference to other diets snf can give unforeen negative results that could outweight all benefits. For example , when the mongoose was introduced in Hawali in order to control the rat poplulation , it preyed on the endemic birds of Hawali , especially their eggs , more often than it ate the rats . As most of the birds feed on insect and keep insect population low . The mangoose who destroy birds acts as secondary pest.