Trap Catches Identified to September 09, 2019

Greetings

Aphid captures per location were similar to last week, but fewer locations are reporting with the waning season. A wide variety of species were captured this week, including some efficient vector species. Green Peach Aphid numbers were down to only 3 this week from 2 locations (Crookston and Syre MN).  With this week's capture, we are still tracking higher than last season's totals and the PVY Vector Risk Index values. 

Ada MN again led aphid captures this week with 76 total vectors being recovered, including Soybean, Corn Leaf, Sunflower, Potato and Cotton/Melon aphids. Crookston and Syre both recovered Green Peach Aphids this week and increases in their PVY Vector Risk Index. 

Aphids continue to be entering potato fields in numbers and Oil and early vinekill are recommended practices to decrease late season movement of PVY.  Remember: If Potatoes Are Green, By Vectors They'll Be Seen!
  
Aphid Fact of the Week - The low evening temperatures and decreasing photoperiod will be signalling aphids currently on their summer hosts to develop a winged generation, which will disperse back to overwintering hosts.

As always, keep on scouting!

Click on any image below for full-scale version.

Cumulative PVY Vector Risk Index to September 09, 2019.

Cumulative PVY Vector Risk Index for 2018 (for comparison)

Aphid Species Capture and PVY Vector Risk Index for Aug 30 - Sept. 09, 2019

Cumulative Aphid Species Capture and PVY Vector Risk Index to Sept. 09, 2019