Trap Catches to Aug 25 - Sep 01, 2023.
Another week with much lower aphid numbers. With 7 trap locations reporting, we continue to see a steady decrease in both total number of aphids, total number of vectors and average vector capture per trap decreasing. The season is winding down with several trap locations having now vine killed and shutting down traps. The total number of vectors and the regional PVY Vector Risk Index is almost double that of was at this time last year, so it's been a high vector pressure year.
Green peach aphids (GPA) were again recovered in 3 of the 7 sites. English grain aphids are no longer being recovered while soybean aphids, although less numerous are well distributed across the region. Most other vector aphid species have decreased and non-vector species are also down.
While this is good news overall, there are still vectors in the region and as long as vines are green, aphids will be attracted to them. Consequently, green plants means the potential for transmission of virus still exists.
You keep scouting and we'll keep counting.
Scouting for aphids in potatoes: