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Resume
The research was carried out during 2005-2007 in the experimental field in institute of Agriculture – Karnobat with time limit of sowing. Species composition and the dynamics spread of aphids was defined. It was extablished that on barley variety Aheloy 2 species Sfrobion avenae, Schizaphis graminum, Rhopalosiphum padi, Rhopalosiphum maidis.