question_answer

                                                                          Due to decreased crop production, Ram was advised to use bio control agents in his field. How do such agents control the target species? Explain by giving some important examples.

Answer:

Biocontrol refers to the use of biological methods for controlling plant diseases, pests, etc.                                

Some examples of biological control are as follows

(i) Ladybird and dragonfly are used to get rid of aphids and mosquitoes, respectively.

(ii) Bacillus thuringiensis is used to control bollworm insects.

(iii) Free - living fungi like Trichoderma is common in root ecosystem and it is used for controlling several plant pathogens.

(iv) Baculoviruses are used for species specific narrow spectrum insecticidal applications.