Page 373 - Applied Pharmacognosy

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5. Methods of Controlling Insects in Crude Vegetable Drugs

i. Heat treatment waterloss &doesn’t
 byexposureto 60-65ᴼ C.
 Thisrangedoesnotallow

inactivateenzymes .
 It is effective for insecteggs that aren’t easily

penetratedbyinsecticides.
 Prolonged exposure to high temperature may

inactivateenzymes. volumeof
 Durationofexposureisdeterminedby

thedrugtobetreated (from minutes to days).