Abstract
The results of studying the effect of the type of host food by which the larvae were reared on , and the type of oil used for some vegetable oils ( sunflower ,Sesame ,Peanut , Soybean and Almond ) on the 3rd instar of grain beetle , showed a different mortality percentage and the Peanut oil exhibit a superior , killing percentage reached 72.5 . and toxicity index 100 on insect larvae reared on Peanut in comparisor with 49.3 % and 41.3 for toxicity index . The lowest killing percentage 43.7 % was obtains from treating larvae reared on Sunflower with Sunflower oil in comparison with 66.6% on larvae reared on wheat .
