Which of the following is used as a microbial | vedclass

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(A) $1$. $Trichoderma$ species are free-living fungi that are very common in the root ecosystems and are effective biocontrol agents of several plant

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Trichoderma species against several plant pathogens

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(A) $1$. $Trichoderma$ species are free-living fungi that are very common in the root ecosystems and are effective biocontrol agents of several plant pathogens.$2$. Nucleopolyhedroviruses are excellent candidates for species-specific,narrow-spectrum insecticidal applications,not for plant diseases like white rust.$3$. $Bt$-cotton is a genetically modified crop designed for pest resistance,not a microbial biocontrol agent for plant diseases.$4$. Ladybird beetles are predators used to control aphids,but they are insects,not microbes.Therefore,the correct option is $A$.

Which of the following is used as a microbial biocontrol agent for plant disease control?

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