الفهرس 
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Abstract
legume grains are considered the most important grains used as human food and animal feed in Egypt. Many insects attack leguminous grains from the stage of flowering and grain formation in the field, as well as when storing them. The long-tailed blue butterfly, Lampides boeticus, attacked the flowers, buds, and pods of these crops and remained in the field till crop maturity. The stored grain insects Callosobruchus maculatus (Fabricius) and Bruchidius Incarnatus Boh are considered the most important and cosmopolitan pests, seriously attacking several legumes stored grains. Ecological studies on certain inset pests infesting legume grains in the field and under stored conditions were conducted. In addition, the efficacy of natural enemies and botanicals have been evaluated for the protection of stored products against common pests. The obtained results can be summarized as follows : Field studies : Seasonal abundance of L. boeticus population and the associated predators was studied during two growing summer seasons of green bean, Phaseolus vulgaris L. plants (2020 and 2021). An area of about half feddan in Gedela district, El-Mansoura, El-Dakahlia Governorate was selected for the present study. The green bean (P. vulgaris L.) area was cultivated with Giza 5 on the 3rd and 4th week of March in the first (2020) and second seasons (2021). The results of this study indicated that : 1-In the first season, the partial population curves of the larval and adult populations of L. boeticus had two peaks of activity. Also, the anthocorid predator, Orius sp. exhibited a similar trend of activity, and showed two peaks of seasonal abundance. 2-In the second season (2021), L. boeticus larva and adult population showed a distinct peak of seasonal abundance. With respect to, Orius sp., the obtained results indicated that Orius sp. population exhibited an approximately similar trend of changes with a distinct peak of abundance. 3-Statistical analysis also indicated that there was a positive highly significant correlation between the predator and its prey populations during the first and second year (r-values were 0.97** and 0.93**). Laboratory studies:1. Influence of different temperatures and certain legume grains on the development of different stages and thermal units required.The influence of different constant temperatures (25, 30 and 35 ºC) and host grain species (cowpea, chickpea, and horse bean) on the duration of the developmental stages of C. maculatus as well as on thermal units required to complete the development was estimated. The obtained results indicated that : i)The time required to complete embryogenesis of the cowpea beetle gradually decreased as the temperature increase from 25 to 35 ºC. The calculated developmental threshold (t0) for embryonic development was 15.04, 13.5, and 15.63 for eggs deposited by females raised on cowpea, chickpea, and horse bean, respectively. The obtained results revealed that the eggs produced from females raised on cowpea significantly required low thermal units (82.87) compared to eggs of females raised on chickpea (104.10) or horse bean (101.45 DDs).