Brown marmorated stink bug captures per night in area black light traps were as follows: Warsaw-0.4, Chesapeake-zero, Prince George (Templeton)-0.3, Prince George (Disputanta)-zero, Suffolk-zero, Sussex-zero, Petersburg-2.0, Southampton-zero, New Kent-zero. Thanks to Mary Beahm, Watson Lawrence, Scott Reiter, Ames Herbert, Kelvin Wells, Mark Kraemer, Chris Drake, and John Allison for their reports this week.
Category Archives: General Comments
Corn earworm moth black light trap catches for week ending July 12, 2012
Corn earworm moth captures ranged from 0.1 to 23 per night in area black light traps. Most reporting locations were on the low side, however. Please see the attached file for more details. Thanks to Mary Beahm, Watson Lawrence, Scott Reiter, Ames Herbert, Kelvin Wells, Mark Kraemer, Chris Drake, and John Allison for their reports. Additional information: blacklight-table-12-pdf
Corn earworm (CEW) pyrethroid AVT update
We have tested another 166 moths since last week’s report and are seeing some improvement, maybe. This recent batch showed a drop to only 17.4 percent surviving the AVT challenge, making a 28.2 percent average survivorship for the seasonal 538 total tested—down a bit from the 31.2 percent survivorship reported last week. Before giving a sigh of relief, study the data from last season (see the attached line graph) and you will see an almost identical pattern with the same slight drop in early June of 2011 followed by a peak exceeding 50 percent survivorship. Stay tuned for more updates. We are also finding what appears to be a high percent of sweet corn ears infested (we pulled a bunch this week at the research center for our respective family 4th of July cookouts). We will be initiating our annual field corn survey soon which gives us the best idea of the size of the CEW population we will be dealing with.
Additional information: cew-cypermethrin-va-july-5-2012-pptx
Corn earworm and BMSB black light trap catches for week ending July 5, 2012
The mean nightly number of corn earworm moths captured in area black light traps was low this week: King William-0.4, Warsaw-0.3, Petersburg-0.4, Prince George (Templeton)-0.4, Prince George (Disputanta)-0.3, Southampton-0.9, Suffolk-4.4. The mean nightly brown marmorated stink bug (BMSB) catch was: King William-0.1, Warsaw-0.3, Petersburg-0.9, Prince George (Templeton and Disputanta)-zero, Southampton-zero, Suffolk-zero. Thanks to Laura Maxey, Mary Beahm, Mark Kraemer, Scott Reiter, Chris Drake, and Ames Herbert for their reports this week.
Virginia Cotton Insect Scouting Schools—2012
Virginia Cooperative Extension Agents are hosting five Cotton Insect Scouting Schools this month. Ames Herbert and Jack Bacheler from NCSU (Windsor, VA meeting, only) will be presenting cotton and soybean insect pest status updates, management recommendations, and demonstrate scouting techniques. Contact the locale Agent for details.
July 16—10 am, Wakefield, VA, ET Drewery Farm (contact Kelvin Wells, VCE Agent, Sussex Co.,VA kewells2@vt.edu)
July 17—9 am, Ivor, VA, CPS Office (contact Chris Drake, VCE Agent, Southampton Co., VA chrisd17@vt.edu)
July 18—5 pm, Windsor, VA, Dairy Queen parking lot (contact Janet Spencer, VCE Agent, Isle of Wight Co., VA jaashle2@vt.edu)
July 19—10 am, Dinwiddie County, Lance and Randy Everett Farm (contact Mike Parrish, VCE Agent, Dinwiddie Co., VA mparrish@vt.edu)
July 19—6 pm, Newsoms, VA, Meherrin Office (contact Chris Drake)
Virginia Tech’s Eastern Shore AREC Field Day set for July 18, 2012
Virginia Tech’s Eastern Shore Agricultural Research and Extension Center (ESAREC) has scheduled their 2012 Research Field Day for Wednesday, July 18, 2012. Registration is free, open to the public, and will begin at 8:00 AM at the ESAREC complex located at 33446 Research Drive, Painter, Virginia 23420. Research projects to be showcased include: herbicide resistant weeds, plant disease management, insect pest management, alternative fertilizers and fertilizer management, fumigant alternatives, and water quality best management practices. Virginia Private Pesticide Applicators and Certified Crop Advisor recertification credits will be offered.
The Virginia Tech ESAREC is committed to supporting commercial vegetable and agronomic crop production throughout the Commonwealth of Virginia. Centrally located on Virginia’s Eastern Shore, the center conducts basic and applied research on more than 25 agricultural crops including, but not limited to, alfalfa, barley, broccoli, cabbage, cantaloupe, collards, cotton, cucumbers, dry beans, edamame, eggplant, field corn, lettuce, lima beans, peppers, potatoes, pumpkin, snap beans, soybeans, spinach, squash, sunflowers, sweet corn, switchgrass, tomatoes, watermelon, wheat, and zucchini.
For more information, visit http://www.arec.vaes.vt.edu/eastern-shore/index.html. If you are a person with a disability and desire any assistive devices, services or other accommodations to participate in this activity, please contact Lauren or Carrie at 757-414-0724* (*TDD number is (800) 828-1120) during business hours of 7:30 a.m. and 4:30 p.m. to discuss accommodations.
Additional information: 2012-esarec-field-day-program-27june2012-docx
Corn earworm and BMSB black light trap catches for week ending June 28, 2012
Reporting locations had fairly low numbers of corn earworm moths this week, although they jumped a little in Suffolk. The mean number captured per night were as follows: Chesapeake-0.6, Petersburg-0.6, Prince George (Templeton)-0.8, Prince George (Disputanta)-0.6, Suffolk-11.7, Virginia Beach-0.3, Warsaw-0.3. Average brown marmorated stink bug (BMSB) nightly captures were: Chesapeake-zero, Petersburg-0.9, Prince George (both locations)-zero, Suffolk-zero, Virginia Beach-1.0, Warsaw-0.1. Thanks to Watson Lawrence, Mark Kraemer, Scott Reiter, Ames Herbert, Helene Doughty, and Mary Beahm for their numbers this week.
Asiatic garden beelte in cotton and a few other comments
Nothing is really hot this week in terms of insect pests. We are seeing a few potato leafhoppers in peanuts but not heavy or widespread. We are concerned about the early results of our annual program for monitoring corn earworm pyrethroid susceptibility, but this issue is covered in detail in another of today’s advisories. In soybeans, we are hearing of more than usual numbers of fields with 3-cornered alfalfa hoppers girdling seedlings. This is a tough insect to make a call on in terms of when to pull the trigger. We have documented some feeding by Asiatic garden beetle in cotton (see attached image slide collection) in one county in the northern part of our cotton area. I noticed that Dominic Reisig at NCSU commented on seeing some of the same in his state. This is a new pest of cotton and we do not know much about it. If the damage is limited to the adults feeding on leaves, we can handle it with some fairly decent guesses as to how much leaf feeding seedlings can tolerate before a treatment is needed. If you view the attached images, you will see some seedlings in the infested area were completely striped of leaves. Will this slow these plants down? Hard to say. This damage will likely not be as damaging as the feeding by thrips that concentrates on the developing bud. But we also know that Asiatic garden beetle grubs can do significant amounts of root feeding. Are they feeding on cotton roots? Would the common cotton insecticide seed treatments offer any protection? All good questions with no immediate answers. This outbreak does tell us that we should be more vigilant when it comes to scouting cotton fields during the period from post-thrips to early squaring. Additional information: asiatic-garden-beetle-cotton-king-queen-va-2012-pptx
Corn earworm moths already showing high levels of pyrethroid resistance in Virginia
As of the end of this week (June 29, 2012) we have tested 372 corn earworm (CEW) moths for pyrethroid susceptibility and have a season average of 31.2% surviving the AVT (adult vial test) challenge (see the attached line graph). We had one sample with over 40% survivorship. These are high numbers for the beginning of the season and compare pretty well to what we had at this time in 2011, if not a bit higher. What does this tell us? We cannot claim ‘pyrethroid resistance’ based on this kind of random survey of moths, but historically, when we see survival numbers of about 25-30% or higher, we can expect some pyrethroid control problems, especially if moth fights are heavy, and the weather turns dry. That combination would almost guarantee control problems. But, if CEW populations reach only low to moderate numbers and the season continues to get plenty of rainfall, field failures will not be nearly as common. With loss of Larvin, an effective non-pyrethroid for controlling CEW, growers will need to turn to other non-pyrethroids like Belt, Coragen (Prevathon**), Steward, or combinations that include a pyrethroid plus a non-pyrethroid either tank mixed (like a pyrethroid + Orthene) or as a product (like Besiege** which contains Karate and Coragen). (**note, the registration status of these products is not certain at this point)
Additional information: va-cew-avt-results-6-28-12-pptx
Corn earworm and BMSB black light trap catches for week ending June 21, 2012
This week’s black light trap catches of corn earworm moths and brown marmorated stink bugs remain low. Average nightly corn earworm catches were: Warsaw-0.2, Petersburg-1.1, Southampton-0.4, Suffolk-1.1, Chesapeake-1.0. Nightly BMSB catches were: Warsaw-0.3, Petersburg-0.3, Southampton-zero, Suffolk-zero, Chesapeake-zero. Thanks to Mary Beahm, Mark Kraemer, Chris Drake, Ames Herbert, and Watson Lawrence for their reports this week.