Most active nitrogen fixing blue-green alga of rice fields is
Anabaena azollae
Aulosira fertilissima
Cylindrospermum licheniforme
Nostoc cycadacearum
Rotenone is a
Insecticide obtained from neem plant is
Simondesia chinensis is commonly known as
Which of the following pesticides have been successfully used in the control of locusts and grasshoppers in India
In September $2001 ,$ which of the following was used as a bioweapon agent in America?