Nightly black light trap averages for corn earworm moths this week were: Petersburg (94/night); Southampton (43/night); Suffolk (82/night).
Author Archives: Sean Malone
Black light trap captures for week ending 2 Sep. 2010
Please see the attached table for current corn earworm moth catches. Additional information: blacklight-table-10-doc
Corn earworm moth pyrethroid resistance monitoring update
For the last week of August 2010, about 35% of corn earworm moths survived 24 hours of exposure to 5 micrograms of cypermethrin (a pyrethroid) in our vial tests. Moths were collected from pheromone traps in Suffolk, VA. We have evaluated 2,598 vials so far this season. Please see the attached line graph to see results for the entire season. Additional information: cew-cypermethrin-ppt
Tour Announcement–Tidewater AREC Late-Season Field Crops Tour–Sept. 14, 2010 @ 2 pm
We will be hosting the “2010 Late-Season Field Crops Tour” at the Virginia Tech Tidewater Agricultural Research and Extension Center on Tuesday, September 14, 2010. Registration begins at 1:30 pm at the RESEARCH FARM (1045 Hare Road, Suffolk, VA); the tour will start at 2:00 pm. Pre-registration is required for the tour/dinner (please see the attachment for more details on pre-registration procedures and the planned topics). 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 Tidewater Agricultural Research and Extension Center at 757-657-6450 (TDD number is 800-828-1120) during business hours of 8 a.m. and 4:30 p.m. to discuss accommodations five days prior to the event. Additional information: 2010-tour-notice-pdf
Corn earworm moth black light trap captures for week ending 26 August
Mean nightly corn earworm moth captures for 20-26 August 2010 were as follows: Petersburg (34), Prince George-Wells (10), Prince George-Lipchak (50), Southampton (68), Suffolk (18), Sussex (18), Essex (5), Northumberland (16), Richmond County (28). Please see the attached table for more information. Additional information: blacklight-table-10-doc
An update of the soybean aphid and brown marmorated stink bug monitoring program
For August 16-19, Ed Seymore reported that surveyed fields in the following counties had little to no soybean aphids, with the exception of Gloucester in the Wood’s X area: Augusta (0), Albemarle (0), Buckingham (0), Caroline (1-5), Charles City (0), Clark (1-5), Culpeper/Fauquier (6-39) aphids/plant), Gloucester (150-249), Goochland (0), Henrico (0), King and Queen (0), King William (0), Lancaster (0), Mathews (1-5), Middlesex (0), Rockingham (0), and Shenandoah (0). The economic threshold for soybean aphid is 250 aphids/plant. Under ideal conditions, soybean aphid populations can double every 2 days. Very low numbers (about 1 per 15 sweeps) of brown marmorated stink bugs were detected in one soybean field in central Culpeper County.
Corn earworm moth black light trap catches for week ending 19 Aug 2010
Seven of nine reporting locations had their highest 2010 captures of corn earworm moths this week (13-19 August). Please see the attached table for more details. Additional information: blacklight-table-10-doc
Resistance monitoring of corn earworm moths
Dr. Herbert mentioned in his 29 July 2010 advisory that we are continuing to monitor for pyrethroid resistance in corn earworm. We have now tested over 1,500 moths and are averaging 28% survival in the 5 ug cypermethrin vials (click ‘More’ to see the data). This is now the third consecutive year that local corn earworm populations are demonstrating high levels of pyrethroid resistance. As Dr. Herbert said in his advisory, proceed with caution and consider non-pyrethroids especially in peanut or soybean fields with a lot of worms. Additional information: cew-cypermethrin-2010-pdf
Corn earworm moth black light trap captures for week ending 12 August 2010
In general, nightly black light trap captures of corn earworm moths remained high this week. Please see the attached pdf for more details. Additional information: blacklight-table-10-pdf
Reminder to visit the Virginia Ag Pest Advisory (http://www.sripmc.org/Virginia/) for important updates on the corn earworm survey, resistance monitoring, and insect activity
This is an update concerning the automatically generated email that notifies people of new posts to the Virginia Ag Pest Advisory. Although our “Friday morning” email did not work on July 30, 2010, it seems that our “Emergency Notification” option is working. We wish to thank Dr. Yulu Xia for his generous assistance working through this glitch. Remember, all advisories are available anytime at http://www.sripmc.org/Virginia/ (you may have to search the archives at the bottom of the website). Please see Dr. Herbert’s posts about the results of the corn earworm survey and resistance monitoring, and also Dr. Kuhar and my posts concerning insect activity this week. Thank you.