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Some Biological Aspects of Sitophilus oryzae (L.) And Trogoderma granarium
Everts On Different Grain Varieties of Wheat and Maize
- Samir S. Awadalla (1), N. F. Abdel-Baky(1), H. A. El-Syrafi (1), M. S. Gharib(2) And A. Y. El-Said (1)
- (1) Department of Economic Entomology, Faculty of Agriculture, Mansoura University, Egypt.
- (2) Plant Protection Research Institute, Dokki, Giza, Egypt.
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
Sitophilus oryzae (L.) and Trogoderma granarium Everts are serious primary insect pests of the stored wheat and maize grains. Both insects were reared on five varieties of wheat and maize to clarify their effects on certain biological aspects as pre-oviposition, incubation period, larval-pupal stage, oviposition period, post oviposition period, and female longevity of both insects. Wheat varieties were Sakha 8, Sakha 61, Sakha 69, and Sakha 93 in addition to Giza 168. Maize varieties were three white Tri- Hybrids (Tri-H) 322, 323 and 324 in addition to Argantina and Okrani. The varieties, in general, affected significantly the larval- pupal stage, oviposition period and female longevity as well as number of eggs/ female. S. oryzae (L.) preferred wheat grains as food than maize grains; 131- 134 and 55- 81 eggs/female in case of rearing on wheat and maize grains respectively. In the same time, Sakha 61 was the best wheat variety followed by Sakha 69. As for maize varieties, the most preferable were Tri-H 323 and 324 followed with Argentina and Okrani than Tri-H 322. On the other hand, means of the incubation period and pre-oviposition period as well as number of eggs/female were insignificantly differed either in tested wheat or maize varieties. T.granarium nearly preferred wheat and maize at the same rate. The best preferable wheat variety was Sakha 69 followed with Sakha 8 and Sakha 93 and Giza 168 than Sakha 61. Also, Tri-H 324 was the best maize variety for rearing this insect, followed with Tri-H 322 and 323 and at least Okrani and Argentina varieties.
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