The Virginia distribution maps for these two invasive species are attached (please click “More”). Additional information: sep5distributionmaps-pdf
Author Archives: Sean Malone
Black light trap counts for week ending August 29, 2013
Please click “More” for the corn earworm moth and brown marmorated stink bug tables. Corn earworm moth numbers varied greatly by location, with some very high captures in Charles City. Brown marmorated stink bug numbers ranged from zero to 2.4 per night. Thanks to the following for their reports this week: David Moore, John Allison, Laura Maxey, Mary Beahm, Keith Balderson, Scott Reiter, Kelvin Wells, Mark Kraemer, Ames Herbert and crew, and Helene Doughty. Additional information: blt29aug13-pdf
Black light trap catches for week ending Aug. 22, 2013
Please click “More” to view the average nightly black light trap captures of corn earworm moths and brown marmorated stink bugs (BMSB). This week’s corn earworm catches ranged from 0.1 to 5.1 per night; BMSB ranged from zero to 1.9 per night. Thanks to our trap operators Chris Drake, Keith Balderson, Mary Beahm, Mark Kraemer, Mike Parrish, Ames Herbert and crew, Laura Maxey, and Jim Jenrette for their reports this week. Also, thanks to all those providing a location and power source for these traps. Additional information: blt-aug22-pdf
Pyrethroid resistance monitoring update–Aug. 22, 2013
As of August 22, 2013, we have evaluated 545 Helicoverpa zea moths (=corn earworm) (=bollworm) in our cypermethrin vial tests (cypermethrin is a standard pyrethroid). Results are provided in the attached pdf document (please click “More”). In the vial test, moths are exposed to cypermethrin for 24 hours and are then rated as dead, down, or alive. For the entire season to date, an average of 22% of H. zea moths have survived the test. Please refer to Dr. Herbert’s August 13th advisory for how to best interpret these vial test results. Additional information: cypermethrin-pdf
Brown marmorated stink bug (BMSB) survey in cotton (so far, none found)
Kudzu bug distribution in Virginia–Aug. 22 update
Please click “More” to view the Aug. 22, 2013 distribution map of kudzu bug in Virginia soybean and other hosts. Also in the attachment is the percent control of a long list of insecticides for kudzu bug (courtesy of Jeremy Greene at University of Georgia and Phillip Roberts at Clemson University). If you are at kudzu bug threshold (1 nymph per sweep) and decide to treat your field, you may want to consider a product (or one with similar active ingredients) from the list that has a high percent control. When choosing a product, please keep in mind any other pests that are present in your field. And, please read and follow the label. Additional information: kudzu-bug-distribution-va-2013-pdf
Brown marmorated stink bug (BMSB) update for soybean
Please click “”More”” to view the most recent update on BMSB distribution in Virginia soybean (please see slide 1 of the attached pdf document). On August 20, our soybean scout Ed Seymore reported that in the last week stink bugs have started to move out of corn and into soybean fields in the counties of Culpeper, Fauquier, Franklin, King George, Rappahannock, Rockingham, Spotsylvania and Stafford. These counties have reached the threshold for stink bugs of 5 stink bugs in 15 sweeps (in the fields that we scouted). Attention should be paid to fields that border corn and woods especially with the tree of heaven (end report from Mr. Seymore). Note that thresholds in soybean do not distinguish between BMSB and native green and brown stink bug species (also shown on slide 1). Dr. Herbert’’s insecticide efficacy trials and on-farm edge treatment research suggest that most insecticides provide initial stink bug knock down (please refer to slides 2 and 3 for efficacy trial results, where the higher percent control, the better). Residual activity varies, and reinvasion can occur after loss of residual protection. Since BMSB exhibit a strong soybean field edge preference, perimeter-only treatments may be effective. Please remember to always base management decisions on proper scouting and thresholds, and always read and follow the pesticide label (sometimes, products and/or rates that we include in our tests are experimental; also, product labels and rates may change from year to year). Additional information: bmsb-pdf
Black light trap catches for week ending Aug. 15, 2013
Please click “More” for this week’s black light trap catches of corn earworm moths and brown marmorated stink bugs. Thanks to all of our trap operators for their reports! Additional information: blt-15-aug-2013-pdf
Invitation to the Virginia Soybean Field Day – Aug. 14, 2013
You are invited to attend the 2013 Virginia Soybean Field Day at the Eastern Virginia Agricultural Research & Extension Center (EVAREC) in Warsaw on Wednesday August 14. Registration begins at 2:30 pm with field tours following at 3:00 pm. Dinner will be served at 6:00 pm courtesy of the Virginia Soybean Board and The Virginia Soybean Association. The address of the EVAREC is 2229 Menokin Road, Warsaw, VA 22572. If you are a person with a disability and desire any assistive devices, services or other accommodations to participate in this activity, please contact the Eastern Virginia Agricultural Research and Extension Center main office at 804-333-3485 (TDD number is 800-828-1120) prior to the event. Field day topics are shown below. We look forward to seeing you there.
Low Phytate Soybeans for a Healthier Chesapeake Bay (Dr. Bo Zhang, Virginia Tech Soybean Breeder); Elite STS Soybeans – Low Input, High Profit (Dr. Zhang);
Superior Conventional Soybeans for Better Yields (Dr. Zhang); Distribution and Management of Brown Marmorated Stink Bug and Kudzu Bug (Dr. Ames Herbert, Virginia Tech Entomologist); Maximizing Double-Crop Yields Through Inputs (Dr. David Holshouser, Virginia Tech Soybean Agronomist); Optimizing Early Season Growth & Yield (Mr. Kevin Dillon, Graduate Research Assistant and United Soybean Board Fellow); Does Variety Affect Yield Response to Fungicides? (Mr. Dillon); Predicting Yield Increases with Fungicides (Dr. Pat Phipps, Virginia Tech Plant Pathologist); Small Grains 2013 Comments (Dr. Wade Thomason, Virginia Tech Small Grains Agronomist); Looking Ahead to Fall Planting (Mr. Keith Balderson, Essex County Extension Agent); Greetings from the Virginia Soybean Association (Mr. Logan Vaughan, President, VSA); CSES Department Update (Dr. Tom Thompson, CSES Department Head); Greetings from CALS (Dr. Jody Jellison, Assoc. Director, Virginia Agricultural Experiment Station).
Black light trap captures for week ending August 8, 2013
Please click “More” to view the tables with the average number of corn earworm moths and brown marmorated stink bugs (BMSB) captured per night in local black light traps. Mark Kraemer in Petersburg reported approximately 3 to 4 BMSB per foot on some maturity group 4 vegetable-type soybean with pods present (Guelph and Kanrich), but BMSB were not on surrounding maturity group 5 soybean in the flowering stage. Dr. Kraemer also reported seeing BMSB on Asian long beans again this year. Mike Arrington found corn earworm (=bollworm) egg-threshold levels in cotton research plots at the Tidewater AREC (Suffolk) and at an on-farm cotton research trial in Southampton County this week. Thanks to our black light trap operators for their reports this week: David Moore, Kelvin Wells, Laura Maxey, Mary Beahm, Chris Drake, Watson Lawrence, Mark Kraemer, Janet Spencer, Ames Herbert and his entomology crew, Scott Reiter, Keith Balderson, Helene Doughty, and Jim Jenrette. Additional information: blt-8-aug-2013-pdf