Question
One of the major difficulties in the biological control of insect pest is that
the predator develops a preference to other diets and may itself become a pest
the predator does not always survive when transferred to a new environment
the method is less effective as compared with the use of insecticides
the practical difficulty of introducing the predator to specific areas.
Solution
A.
the predator develops a preference to other diets and may itself become a pest
