Question

For control of insects and mites in grains, fumigation is done. What factor does the toxicity of fumigation depend on?

a.

Concentration of gas

b.

Length of exposure

c.

Concentration of gas & Length of exposure

d.

None of the mentioned

Answer: (c).Concentration of gas & Length of exposure

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Q. For control of insects and mites in grains, fumigation is done. What factor does the toxicity of fumigation depend on?

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