Trap Catches to August 27, 2021.
As evening temperatures decrease and plant hosts start to senesce throughout the region, aphid numbers are dropping rapidly. Overall catch across the trapping network is down 75% from last week and the average catch per trap is lower still. There were very few aphids captured over all and the rise in the PVY Vector Risk Index is only 20% of what it was just last week.
Next week will likely be the last week of trapping, many trap sites have already stopped for the season as vine kill and/or harvest has already occurred. Overall, the PVY risk looks considerably lower than this time in 2020; 2021 saw earlier flights but overall numbers of vectors were still lower.
Keep scouting, we'll keep counting...
Scouting for aphids in potatoes: