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In order to find sources of wheat. resistant to Russian wheat aphid, 58 varieties of wheat and two other cereals (rye and triticale) were screened at
seedling stage under greenhouse conditions. Varieties were infected by aphid and then divided into six groups based on the percentage of seedling survival.
Finally ten varieties were selected and rescreened using two replications. The
results indicated that varieties Yavaras, Mutant arvand, Bezostia, Bafeghi and Alamoot exhibit a high degree of resistance to the aphid.