Page 378 - Applied Pharmacognosy

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5. Methods of Controlling Insects in Crude Vegetable Drugs

i. Heat treatment.
ii. Fumigation using volatile insecticidal agents in closed area.
iii.Liming.
iv.Lowtemperaturestorage.

 Wherepossible, itispreferredoverfumigantsand
liming.

 Adultinsects,pupae,andlarva are killed by

extremelylowtemperatures.Exposuretosubfreezing

temperatures of 10-15ᴼ C for 12-18 hours will

destroyeven eggs.