" Which of the following is a gregarious pest? "

Which of the following is gregarious pest :-

Which of the following is used as Bio-pest repellent:

Which of the following soil bacterium produces a protein/chemical that is toxic to insect pests?

Which of the following soil bacterium produces a protein/chemical that is toxic to insect pests?

Which one of the following is not a lepidopteran insect pest ?

Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

Which one of the following is an example of carrying out biological control of pests/ diseases using microbes ?