The phenomenon of using a predator for controlling a pest is known as:

The carnivorous fish $Gambusia$,introduced in lakes,ponds,etc.,to control a deadly disease in India,feeds on the larvae of:

What are Nucleopolyhedroviruses being used for nowadays?

Which of the following is not used as a biopesticide?

Identify the organism based on the following characteristics:
- It grows near the root system.
- It is an effective biocontrol agent of several plant pathogens.
- It is a biological control being developed for use in the treatment of plant diseases.

Which of the following has proven useful for controlling nematode diseases in vegetables,fruits,and cereal crops?