Page 375 - Applied Pharmacognosy

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5. Methods of Controlling Insects in Crude Vegetable Drugs

ii. Fumigation using volatile insecticidal agents in closed area

 Mostfumigants donotkilltheeggsofinsects ,

andthereforeitisacommonpracticeto repeat

fumigationatintervalsoftwoweeks , togive

betterchanceofeliminatingallinsects,since

timeispermittedforeggstohatchandlarvae

arekilled .

 Storeddrugsthataresusceptibletoinsectattacks
should be fumigatedroutinelyevery3or4
months.