西批农林升枚大学 IVERS 3.Damage All 3 species are polyphagous,but Macrosiphum avenae mainly damage wheat;Schizaphis graminum feed mainly on wheat and sorghum;Rhopalosiphum padi,on wheat and maize. 88888 All 3 species are polyphagous, but Macrosiphum avenae mainly damage wheat; Schizaphis graminum feed mainly on wheat and sorghum; Rhopalosiphum padi, on wheat and maize. 3. Damage