Trap Catches to August 13, 2021.
Aphid vector numbers decreased again this week, although we did see the first Green Peach aphid of the year (but only 1 so far!). Most species numbers were down over all.
Soybean and Corn Leaf aphids remained roughly the same while English Grain aphids were only half of last week's numbers. A single Green Peach aphid was recovered from the Ada, MN site. Numbers of other vector species were also down over all. Non-vector aphid species decreased by 20% but there are still numerous aphids flying.
While the season appears to be slowing, remember our peak aphid flights in Minnesota and North Dakota occur through August, explaining why most of our PVY is transmitted later in the season. There's still a lot of time for aphids to find green plants, so continue appropriate disease management tactics.
Keep scouting, we'll keep counting...
Scouting for aphids in potatoes: