Which organism is useful for the control of butterfly caterpillars?

Which virus is responsible for the biological control of insects and arthropods?

Explain the biological control of pests and diseases.

Identify the incorrect statement.
$(i)$ Bacillus thuringiensis are available in sachets as dried spores which are mixed with kerosene and sprayed on to vulnerable plants.
$(ii)$ $B. thuringiensis$ are used to control butterfly caterpillars,but leave other insects unharmed.
$(iii)$ The toxin of $B. thuringiensis$ is released in the blood of larvae and the larvae get killed.
$(iv)$ By the development of methods of genetic engineering,$B. thuringiensis$ toxin genes have been introduced into plants.

Biological control agents are becoming increasingly important in modern agriculture. Which of the following is considered a third-generation pesticide?

Which of the following is not used as a biopesticide?