الفهرس 
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Abstract
The Present Work Deals With: 1) The Study Of Testing The Action Of Foliage Extracts And Juices Of A Number Of Insect Host Plants On Several Members Of The Entomopathogenic Bacteria In Vitro.2) Evaluation Of The Action Of Plant Foliages In The Form Of Gut Contents, After Being Ingested By The Testects, On Different Entomopathogenic Bacteria In Vitro. 3) Testing The Plant Foliage That Show Antibacterial Activity In Order To Detect Any Possible Toxic Action Of The Plant Itself Upon The Insects. 4) Testing The Susceptibility Of Three Serious Insect Pests And One Benificial Insect To Different Entomopathogenic Bacteria As Affected By Their Host Plants.