Trap Catches Identified to June 26, 2020.

Greetings

The season Aphid Alert Trapping season has started. This year we have 20 traps established and 5 reporting this week.

The season has started slowly.  Traps in 5 locations have reported weekly captures and vector numbers are low to this point.  Only Crookston, Humboldt and Perham recovered vector species and the PVY Risk Index values are low. 

Colorado Potato Beetle have been moving into fields, mating and egg laying has likely began in established fields.  Time to start scouting for beetles, especially in fields where insecticides weren’t applied at-plant or where their efficacy is decreasing.  Remember, early instar larvae (very small larvae) are susceptible to insect growth regulators, like Rimon, and it might be a good start.  Likewise, contact insecticides. Like Torac, are going to be more effective earlier in the season when canopies aren’t as well established. 

If you have a field where Colorado Potato Beetle aren’t being controlled by insecticides, please let us know.  We’d like to get samples of that population to test for insecticide resistance.  Contact Ian MacRae at 218-280-9887.

As always, keep on scouting!

Click on any image below for full-scale version.

Cumulative PVY Vector Risk Index to June 26, 2020.

Cumulative PVY Vector Risk Index for 2019 (for comparison)

Aphid Species Capture and PVY Vector Risk Index for the week ending June 26, 2020

Cumulative Aphid Species Capture and PVY Vector Risk Index to June 26, 2020.