Varietal Preference of Sitophilus oryzae (L.) And Trogoderma Granarium Everts on Some Grain Varieties of Wheat and Maize

• Hala A. El-Syrafi (1), N. F. Abdel-Baky(1) , S. S. Awadalla(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

This work was done to clarify food preference of S. oryzae and T. granarium to different wheat and maize varieties. Non-choice and choice tests were followed. Results showed that giving, the insect a chance to choose the preferred food increased mean number of eggs/Female as well as mean number of the emerged individuals. Therefore, it could consider both Sakha 8 and Sakha 93 were the most susceptible wheat varieties. Wheat varieties were generally more preferred to both insects either in non- choice or free choice methods. Also, wheat variety Sakha 8 followed by Sakha 93 and maize variety Tri-H 322 were the best preferred for both insects, while Giza 168 and Okrani were the least in this respect. The varietal differences had a significant effect on the biological parameters dealt in this research.