Which of the following is NOT an IPM non-chemical control method?

• A. Sanitation, exclusion, physical barriers, traps, or habitat modification.
• B. Use of insect growth regulators.
• C. Release of beneficial predators.
• D. Weed suppression by mulching and crop rotation.

Answer: (B)

In IPM, non-chemical approaches rely on cultural, physical, or biological tactics rather than pesticides. The use of insect growth regulators is a chemical pesticide that targets insect development, so it counts as a chemical control rather than a non-chemical one. The other options—sanitation, exclusion, physical barriers, traps, and habitat modification; releasing beneficial predators; and weed suppression through mulching and crop rotation—are all classic non-chemical strategies that reduce pest pressure without applying pesticides.