Reporting what will likely be the last report of the season, we received trap contents from two locations this week, neither of which contained any aphids. Consequently, neither cumulative trap captures nor PVY Vector Risk Index values change this week...
As a seasonal wrap-up, we can say the PVY Vector Risk Index for 2016 was less than it was for almost all locations in 2015. Significantly fewer green peach aphids were recovered (only 17 as opposed to the 143 GPA captured last year) and soybean aphid populations remained low throughout the season with the August dispersal event never really occurring (only 25 soybean aphids were recovered in 2016 as compared to 2189 soybean aphids in 2015!). Most of the aphid vectors recovered in traps in 2016 were only moderately efficient vectors compared to green peach aphids as well, keeping the PVY Vector Risk Index numbers low through the summer.
Here's wishing you all good numbers in the winter grow outs!
Aphid Alert Trap Catch Identified Sept 12-16
Seasonal Aphid Trap Catches for 2016