Which of the following is an effective medicine for diseases in cereal crops and vegetables?

Assertion $A$: The use of biocontrol agents prepared by microorganisms has become necessary as an alternative to chemical pesticides.
Reason $R$: The use of biological control agents helps maintain the balance of the ecosystem.
Which option is correct for Assertion $A$ and Reason $R$?

Which is a bioinsecticide?

In a type of organism,the use of its physiological processes or traits to suppress the reproduction of another organism or to destroy it is known as what?

What is the use of $Trichoderma$?

One of the major difficulties in the biological control of insect pests is that