Which of the following is the ladybird beetle useful for getting rid of?

The chemical formula of 'Paris green' is

Baculoviruses are pathogens that attack which of the following organisms?

What are fungicides actually?

Which of the following is not the belief of an organic farmer?

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.