Data reported here only for locations with links. Captures of winged aphids in the Aphid Alert network traps increased substantially this week. Most of the aphids captured this week are those associated with small grains but green peach aphids were found at most locations. As small grains mature throughout the Valley a greater proportion of aphids will develop wings.
Winged aphids leave small grains in search of a suitable host.
Minnesota and North Dakota locations averaged 8.45 aphids per trap of all species and 0.17 green peach aphids per trap. We continue to find green peach aphids on wild mustard. Wild mustard is growing profusely in many drowned out row crops. If these wild mustard infested fields persist, we would expect to capture green peach aphids throughout the month of August which is not good news for seed potato growers. PVY spread cannot be stopped with insecticides.