Biological control methods adopted in agricul | vedclass

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(D) Biological control is a method of controlling pests in agriculture that relies on natural predation rather than introduced chemicals.Predators are

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Predation

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(D) Biological control is a method of controlling pests in agriculture that relies on natural predation rather than introduced chemicals.Predators are organisms that hunt and kill their prey.In agricultural ecosystems,specific predators (or parasitoids) are introduced to control the population of pests that damage crops.For example,the ladybird beetle is used to control aphids,and dragonflies are used to control mosquitoes.Therefore,biological control methods are primarily based on the principle of predation.

Column $I$ (Pathogen)	Column $II$ (Host)
$a$. $Bacillus$ $papillae$	$i$. $Gypsy$ $moths$
$b$. $Beauveria$ $bassiana$	$ii$. $Cabbage$ $worms$
$c$. $Nosema$ $locustae$	$iii$. $Aphids$
$d$. $Nucleopolyhedroviral$ $virus$	$iv$. $Grasshoppers$

Biological control methods adopted in agricultural pest control are based on:

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