In the ecosystem,which of the following are very effective biocontrol agents against plant pathogens?

  • A
    Baculoviruses
  • B
    Trichoderma
  • C
    Nucleopolyhedrovirus
  • D
    Ladybird beetles and dragonflies

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- They are pathogens.
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$A$: Baculoviruses are species-specific.
$R$: They are very common in root ecosystems and effective against several plant pathogens.

Which one of the following is $NOT$ a bioherbicide of bacterial origin?

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