Trap Catches Identified to August 25
Greetings!
Welcome to the Aphid Alert update for the week ending August 25. Trap catches took a drop this week but numbers are still relatively high compared to last several years. The average catch per trap last week was approx 67 vectors per trap location, although that was heavily influenced by two locations with over 500 aphids between them. Even dropping those two traps out of the calculations, the remaining traps still averaged 33 vectors per location. Traps this week averaged just 21 vectors per location. The total trap catch for 2016, however, averaged only 29 per location for the entire cumulative season!
The number of Green Peach Aphids (GPA) were down this week but 7 sites still captured a total of 9 GPA. Soybean aphid numbers were also down this week but both Bird Cherry Oat and Corn Leaf Aphids, coming out of small grains, were still relatively numerous.
Given the number of PVY vectors still present and flying across the entire region, it's important to remember that most of our PVY transmission occurs in the later part of the season. Aphids leaving other host crops as they decline move to crops that are still green. This would be a good year for early vine kill; if fields haven't yet been killed, this would be a good time to think about it.
The number of Green Peach Aphids (GPA) were down this week but 7 sites still captured a total of 9 GPA. Soybean aphid numbers were also down this week but both Bird Cherry Oat and Corn Leaf Aphids, coming out of small grains, were still relatively numerous.
Given the number of PVY vectors still present and flying across the entire region, it's important to remember that most of our PVY transmission occurs in the later part of the season. Aphids leaving other host crops as they decline move to crops that are still green. This would be a good year for early vine kill; if fields haven't yet been killed, this would be a good time to think about it.
Remember, keep scouting!
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Total 2016 PVY Vector Risk Index for Comparison
Weekly Trap Capture by Location
Cumulative Seasonal Capture & PVY Vector Risk Index by Location
