Bird Cherry-Oat Aphid (Rhopalosiphum padi)
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Bird cherry-oat aphids (BCOA) occur in fall and spring. Wingless BCOA are distinguished from the greenbug by their olive-green color and the red-orange patch on the rear end of the aphid. "Old" BCOA found in winter and early spring may be totally black in color, but they will give birth to more typical aphids in the spring. The BCOA is a very efficient vector of the virus that causes barley yellow dwarf disease (BYD).


This program doesn't help with insecticidal control for the BCOA, for more information visit OSU Fact Sheets.

 

 

 

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Bird Cherrry-Oat Aphid

 

BCOA on wheat.