Q39
Cochineal insects have proved very useful for
A.
Weed control
B.
Parthenium control
C.
Cactus prevention
AnswerD.
Eichhornia prevention
Answer: Option C
Solution
Answer: Option C
Solution:
Cochineal insects have proved very useful for Cactus prevention.Cochineal insects are soft-bodied, flat, oval-shaped scale insects. The females, wingless and about 5 mm (0.20 in) long, cluster on cactus pads.
They penetrate the cactus with their beak-like mouthparts and feed on its juices, remaining immobile unless alarmed. Male nymphs feed on the cactus until they reach sexual maturity.