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

Bio-insecticides include:

Which microorganism is used to control pests that are harmful to cotton?

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 is used as a biocontrol agent that specifically attacks insects and arthropods?

Gambusia is a/an: