Among pesticides zinc phosphide is used for
Spraying
Fumigation
Killing weevils
Rodents
Which of the following plants are used as green manure in crop fields and in sandy soils?
Which of the following pesticides is employed widely in antimalarial programmes
‘Central Plantation Research Institute' is located in
A major pest eradicated through release of sterile males is
Consider the following four statements $(A-D)$ and select the option which includes all the correct ones only.
$(A)$ Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins, etc.
$(B)$ Body weightwise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day.
$(C)$ Common button mushrooms are a very rich source of vitamin $C$.
$(D)$ A rice variety has been developed which is very rich in calcium.