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 established that on barley variety Aheloy 2 species Sitobion avenae, Schizaphis graminum, Rhopalosiphum padi, Rhopalosiphum maidis. [BG].
Influence the date to sowing of forage barley on the specific composition and the numeral dynamic of the aphids