Aphid transmitted virus diseases remain at the forefront of management concerns for the processing industry. In Wisconsin during 2000, symptoms of what turned out to be a virus complex were first noted in eastern WI in a narrow strip extending from north of Milwaukee to the Door County peninsula. Additional areas reporting plant symptoms and related yield and quality loss included Michigan, southern Ontario and New York State. The problem has reappeared in each succeeding year, although the severity of losses and the distribution of the problem is largely dependant on prevailing environmental conditions and the timing of aphid flights. Several viruses including cucumber mosaic virus (CMV), alfalfa mosaic virus (AMV) and clover yellow vein virus (CYVV) alone and in combination have been identified in symptomatic plants each of the production years since 2000. All of these viruses are transmitted by aphids in a non-persistent manner. The soybean aphid appears to be the primary vector of this complex of viruses. This past summer, a year characterized by cool temperatures coupled with the limited distribution and low numbers of the soybean aphid, we observed limited distribution of symptomatic plants and a low impact of virus on pod yield and quality.