A) In conventional farming practices, use of pesticides, kill both useful and harmful insects indiscriminately. Therefore, insect outbreaks are often seen in conventional farms
B) Fertilisers are used in conventional farming to increase yield. The increase in crop yield will consequently increase the diversity of pests
C) In natural field, the biodiversity sustains a complex system which checks and balances insects at a manageable levels
D) Both (a) and (c).
Correct Answer: D
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