Gambusia is a/an .......

What do bionematicides control?

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.

Which bacterium is used to control harmful pests in fruit trees?

Select the correct group of biocontrol agents.

Match the following biopesticides with their respective plant or microbial sources and select the correct option.

List-$I$	List-$II$
$(a)$ Rotenone	$(1)$ Derris elliptica
$(b)$ Nimbin	$(2)$ Azadirachta indica
$(c)$ Pyrethrum	$(3)$ Chrysanthemum cinerariifolium
$(d)$ Thurioside	$(4)$ Bacillus thuringiensis