Abstract
The experiments were carried out in the experimental Farm of Sakha Agricultural Research Station, Kafr El – Sheikh Government during two successive seasons, 2013/14 and 2014/15. Four wheat cultivars namely, Giza168, Sakha94, Masr2 and Gemmiza11 were obtained from Agriculture Research Station. To study the effect of, the different wheat varieties on the population density and average number of the main aphid species.The obtained results showed that, the highest average number of the bird cherry– oat aphid, Rhopalosiphum padi Linnaeus, was recorded on Gemmiza11variety during the two successive seasons, and represented by 183.6 ± 69.8 and 139.4 ± 54indiv. respectively. The results indicated that, the highest average number of the green cereal – bugaphid, Schizaphis graminum Rondani, and was recorded on Gemmiza11variety during the two successive seasons, and represented by 109.2 ± 38.9 and 108.3 ± 34.1indiv respectively. Whereas, the highest average number of the English grain aphid, Sitobion avenea Fabricius.was recorded on Gemmiza11variety during the two successive seasons, and represented by 147.4 ± 39.2 and 113.1 ± 41.7indiv.respectively. Statistical analysis revealed significant differences among wheat varieties during the two seasons of study.
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