الفهرس 
introductionOnly 14 pages are availabe for public view
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Abstract
In The Present Work, Two Types Of Tobacco Are Used Namely, Gyc And Gbb Which Are Different In Their Sugar And Nicotine Content. 500 Gm. Are Taken From Each Type Of Tobacco Every 15 Days All Over The Year. The Weight Consumed Of The Two Types Of Tobacco Is Estimated And It Is Noticed That There Are Differences Between The Consumed Weights Of The Two Types. These Differences May Be Due To The Differences In The Number Of Various Stages Of L. Sericome. The Number Of The Pupae Increases Before The Generation And The Number Of Eggs And Larvae Increases After Generation. The Weight Increases During The Period Of Generation And Increases Further After It, This Is Due To The Number Of Larvae Which Consume More Food Than The Adult Stage.