Carbamates used as fungicides are

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

The first bioherbicide developed in $1981$ was based on:

Which bacteria are used for the control of pests that are harmful to cotton and fruit trees?

Consider the following statements:
$I.$ Ladybirds and dragonflies are used to get rid of aphids and mosquitoes.
$II.$ The bacteria $Bacillus$ $thuringiensis$ $(Bt)$ are used to control butterfly caterpillars.
$III.$ $Trichoderma$ $sp.$,free-living fungi,are present in root ecosystems where they act against several plant pathogens.
$IV.$ $Rhizobium$ is a symbiotic bacterium that lives in the stem of legumes.
Which of the statements given above are correct?

Identify the incorrect statement with reference to biocontrol agents.