The pesticide used in foundations of buildings for preventing termite attack is
$DDT$
$BHC$
Aldrin
Endosulphan
Yeast in an important source of
By which of the following methods, new and better varieties of plants can be formed?
Gossypium hirsutumis
Carbamates used as fungicides are
The prickly pear weed $(Opuntia) $ bacame a menace and it has been successfully controlled by