Question

The approach to biological control includes:
a. Import and release of an insect pest to a new area to provide hosts for
natural enemies
b. Import and release of natural enemies from the native home of an alien
insect pest that has invaded a new area
c. Preservation of natural enemies (predators & parasitoids) that are
already established in an area
d. Use of insecticides to reduce alien insect pests to establish new
equilibrium position.

Answer 1

Answer:

There are three primary methods of using biological control in the field: 1) conservation of existing natural enemies, 2) introducing new natural enemies and establishing a permanent population (called "classical biological control"), and 3) mass rearing and periodic release, either on a seasonal basis or inundatively.