Which of the following statements is correct with regard to biocontrol agents ?

Ladybird and dragonflies are used to get rid of aphids and mosquitoes respectively.

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Bacillus thuringiensis bacteria are used to control butterfly caterpillars.

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Trichoderma species are used to control several plant pathogen.

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All of these

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Solution

The correct option is D All of these
Ladybird and dragonflies are used to get rid of aphids and mosquitoes respectively. Bacillus thuringiensis bacteria are used to control butterfly caterpillars. Trichoderma species are used to control several plant pathogen..
So, the correct option is 'All of these'

Suggest Corrections

	Column-I		Column-II
(a)	Dragonflies	(i)	Biocontrol agents of several plant pathogens
(b)	Bacillus thuringiensis	(ii)	Get rid of aphids and mosquitoes
(c)	Glomus	(iii)	Narrow spectrum insecticidal applications
(d)	Baculoviruses	(iv)	Biocontrol agents of lepidopteran plant pests
		(v)	Absorb phosphorus from soil