Insect Monitoring Network Update – 3rd Week of August
This article has been reposted from the Fruit, Vegetable, and Special Crop News. To view the original article, click HERE.
Brown Marmorated Stink Bug – Traps have been placed in Greene, Knox, Loraine and Ross counties. Adults are currently active on a broad range of specialty crops including berries, apples, tomatoes and peppers. The only crop with an action threshold is apple based on 10 bugs cumulative per trap placed at the edge and interior of the block. This threshold has not been tested in Ohio.
Spotted wing Drosophila – A total of eight sites have been set up in Greene, Geauga, Loraine, Adams and Ross counties. SWD has been detected in all counties with individual trap counts ranging from 17 to 44 flies. The threshold for this pest is 1 fly per trap. Expect untreated adult populations to build and cause damage through final harvest. Insecticide treatments and other cultural methods such as proper pruning and weed fabric will help to manage the infestation through final harvest. Growers with ripening brambles, blueberries, peaches and other soft skinned fruit should be aware this pest is likely present in all 88 counties at this point in the season. Refer to this factsheet for more information on control measures https://bpb-us-w2.wpmucdn.com/u.osu.edu/dist/1/8311/files/2020/11/SWD_Ohio_handout_V20.pdf
European corn borer – Five monitoring sites are set up in South Charleston (Clark Co.), Fremont (Sandusky Co.), Geauga and Huron Counties. All sites are reporting zero moths for the past week. Although the traps are not detecting moths, given the accumulation of heat units we have had if there are pockets of ECB out in the state, it is possible a third generation may emerge in late August.
Corn earworm – Eight monitoring sites are set up in Clark, Sandusky, Fayette, Huron, Pike and Crawford counties. Moth counts have fluctuated in the past two weeks between 0-29 moths per trap per week, with the highest moth count in Clark county. As we get later into the season, expect larger migratory flights of CEW to be present in the state, especially around silking sweet corn. If you have a trap that is located near a mature sweet corn field, move it to a soon to be silking field, as CEW moths are preferentially attracted to silking sweet corn over young or mature sweet corn plants. If you have a trap set near a mature sweet corn field, expect lower CEW moth catch but possible damage.
Squash vine borer – There are 11 counties currently trapping for this pest in Clark, Greene, Montgomery, Fayette, Geauga, Ross, Pike, Seneca, Morrow, Summit and Williams counties. Clark, Greene, Seneca, Williams and Montgomery. Reports for the last week show a general reduction of moths captured per trap per week, ranging between 1 and 6. This insect should continue to decline through the rest of the season. As growers walk and scout fields, be vigilant to identify potential SVB damage on plants to estimate injury.
Growers can access and view the monitoring data directly at this site.
https://docs.google.com/spreadsheets/d/1T4Uk8VKH-fY4qms4FlEwQvz8o1Lxk-t8LLHVz97kxNU/edit?usp=sharing
