The first report of biological control of insect pest in India was made by

Answer: Option A

The first report on biological control of insect pests in India was made by Rothney.
Biological control is the use of living organisms to suppress pest populations, making them less damaging than they would otherwise be.
Natural enemies of insects play an important role in limiting the densities of potential pests. These natural enemies include predators, parasitoids, and pathogens.
During this decade, in the US, the Missouri State Entomologist C. V. Riley and the Illinois State Entomologist W. LeBaron began within-state redistribution of parasitoids to control crop pests.