The two natural insecticides used before 1940 | vedclass

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Question

(A) Before the widespread use of synthetic chemical insecticides like $DDT$ in the $1940s$,humans relied on natural substances for pest control.Pyreth

Vedclass · Accepted Answer

Pyrethrum and rotenone

Vedclass · Answer

(A) Before the widespread use of synthetic chemical insecticides like $DDT$ in the $1940s$,humans relied on natural substances for pest control.Pyrethrum (extracted from Chrysanthemum flowers) and rotenone (extracted from the roots of certain tropical legumes) were the two primary natural insecticides used extensively before $1940$.

The two natural insecticides used before $1940$ were:

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