品北农林升枚大学 NORTHW国图T A&F UNIV到RsIT型 5.Behavior English grain aphid favors sunlight and feeds on faces of upper leaves,especially wheat ears.Most destructive damage seen after wheat heading. 888880• English grain aphid favors sunlight and feeds on faces of upper leaves, especially wheat ears. Most destructive damage seen after wheat heading. 5. Behavior