The two natural insecticides used before $1940$
The two natural insecticides used before $1940$
- A
Pyrethrum and rotenones
- B
Pyrethroids and nicotine
- C
Pyrethrum and azadirachtin
- D
Pyrethrum and squill
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Which one of the following is being tried in India as a bio-fuel substitute for fossil fuels?
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Herbicides prevent
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Thurioside is a proteinaceous toxin which is obtained from
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What is required for nitrogen fixation by Rhizobium
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