Abstract
The present study included to know about the effectiveness of steep chickpea Cicer arietinum L. seeds with ethanolic and aqueous extracts of the Oleander Nerium oleander, Basil Ocimum basilicum, Chinaberry Melia azedarach, and Natgrass Cyperus rotundus leaves with four concentration (0.5, 1.0, 2.5, 5.0) % on some biological sides of the cowpea beetle Callosobruchus maculatus (Fab.). The present study showed the superiority of leaves extracts of Oleander and Chinaberry as compared with leaves extracts of Basil and Natgrass, as well as the superiority of aqueous extracts as compared with ethanolic extracts of the present study plant's leaves on some biological sides of the cowpea beetle C. maculatus (Fab.). Also, the present study showed that the least number of laid eggs was recorded at a concentration of 1.0% of the ethanolic extract of the chinaberry with several 31.5 eggs, the least percentage of hatched eggs was recorded in the aqueous extract of chinaberry at a concentration of 5.0% with a percentage of 64.8%, the highest larval stage period was recorded at a concentration of 5.0% of the ethanolic extract of the chinaberry with a period of 19.8 days. Total mortality (100%) in the larval stage was achieved with a concentration of 5.0% of the aqueous extracts of the Oleander and Chinaberry. The highest pupal stage period was recorded at 5.0% of the ethanolic extract of the chinaberry at 14.8 days. The highest mortality in the pupal stage was recorded at a concentration of 2.5 % of the aqueous extract of the chinaberry with a percentage of 23.0%. The least number of emerged adults in the first generation and least percentage of productivity were recorded at a concentration of 5.0 % of the aqueous extracts of the Oleander and Chinaberry, with several 0.0 adults and a percentage of 0.0%, respectively.The study also showed that the germination percentage of Chickpea seeds was not significantly affected when it was treated with different concentrations of ethanolic and aqueous extracts of the present study plants' leaves.
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