Which of the following is the first fungicide
$2, 4-D$
$D.D.T.$
$B.H.C.$
Bordeux mixture
Leaves of which plant can sharpen the memory?
Which one of the following is being tried in India as a bio-fuel substitute for fossil fuels?
A legume having symbiotic association with two nitroge fixing bacteria (Rhizobium and Aerorhizobium) is
A natural insecticide obtained from plants is
Cochineal insect has been used in checking the wild growth of