Pheromone traps contain which of the following?

The first bioinsecticide to be developed on a commercial scale was:

When a natural predator is used to control pathogenic organisms,this process is called:

Which bacteria was the first to be used as a biopesticide on a commercial scale in the world?

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 one of the following is $NOT$ a bacterial herbicide?