Trap Catches Identified to August 31th

Greetings!

With the season winding down, aphid numbers are definitely trending downwards, only 52 aphids, 38 of which were vector species were recovered from traps at 10 locations this week.  

Only three Green Peach Aphids were recovered this week (all from Grenora) and Soybean Aphids were completely absent from this week's trap samples.  Grain aphids are also dwindling and the two most numerous vector aphid species in traps this week were Foxglove and Buckthorn aphids.  

Many locations have already vine killed, but if not, keep in mind, if there are green vines, aphids will still probe and transfer any inoculum they pick up.  Most of our PVY in MN and ND is transmitted to the plant in the latter part of the season.

We'll probably only run the network another 1-2 weeks, hope you're having a great late season!  

Cumulative PVY Vector Risk Index Map to August 31, 2018

Cumulative PVY Vector Risk Index Map for 2017 

(included for comparison)

Aphid Species Capture + PVY Risk - Week of August 19th, 2018

Total PVY Risk and Species Capture to August 24th, 2018