Gujarati
8.Microbes in Human Welfare
normal

Cochineal insect has been used in checking the wild growth of

A

Opuntia

B

Eichhornia

C

Aphids

D

Screw worm

(AIPMT-1996)

Solution

(a)In India and Australia, prodigious spread of prickly pear $(opuntia) $ was controlled by introduction of cochineal insects $(Cactoblastis cactorum).$ 

Standard 12
Biology

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