Corn earworm/bollworm moth captures in the black light traps increased this week, with averages ranging from 2 to 65 moths per night. Suffolk and Hanover had high numbers. Brown marmorated stink bugs ranged from zero to 10 per night across our reporting stations (high numbers in Hanover). More details can be found in the tables here: BLT_27_Jul
Be sure to scout your fields to keep aware of your pest situation. The 2017 Virginia Cooperative Extension Field Crops Pest Management Guide contains thresholds, sampling procedures, and products/rates for soybean (pages 4-61 to 4-76), peanut (pages 4-77 to 4-86), cotton (pages 4-87 to 4-100) and other crops. There is also an online threshold calculator for corn earworm in soybean
Results (to date) from Dr. Taylor’s corn earworm survey of field corn are as follows: Accomack= 29% infested ears; Northampton=38%; Henrico=37%; Chesapeake=19%; Dinwiddie=19%; Greensville=19%; Prince George=20%; Southampton=53%; Sussex=26%; Amelia=18%; Lancaster=4%; Northumberland=7%; Richmond County=4%; Westmoreland=6%; and Franklin County=46% infested ears.
This week, our black light trap operators reported a range of zero to 8.5 corn earworm/bollworm moths per night and zero to 2.7 brown marmorated stink bugs per night. The tables are in this pdf file: BLT_20_Jul_2017
The corn earworm/bollworm pyrethroid resistance monitoring program is averaging about 36% moth survival. These are pheromone trap-collected moths from Suffolk, Virginia. The pyrethroid is cypermethrin at 5 micrograms per vial.
Virginia Cooperative Extension ANR Agents, Virginia Tech personnel, interns, and others have started our annual field corn survey for corn earworm/bollworm larvae. It can be an indicator of the pressure that we’ll see in other crops (e.g., soybean) when the moths emerge and fly out of corn fields. We’ll have a full report in the beginning of August (including data from many more counties), but here are the average ear infestations from those surveys already completed (based on sampling 50 ears per field, 5 fields per county): Accomack=29%; Henrico=37%; Southampton=53%; Amelia=18%; Westmoreland=6%.
Virginia Cooperative Extension ANR Agents and Virginia Tech faculty/staff have started up their black light traps to monitor corn earworm moths (aka bollworm) and brown marmorated stink bugs for the season. CEW and BMSB catches have been low in the black light traps; however, our pheromone traps in Suffolk, VA are catching moderate numbers of CEW moths–averaging about 5 per night. We tend to pick up more CEW moths in the pheromone than in the black light traps during this time of year. Dr. Taylor’s cypermethrin vial tests are showing about 35% of CEW moths surviving the 5 microgram rate (the moths were collected from the Suffolk pheromone traps). Watson Lawrence reported 26 brown stink bugs in his Chesapeake black light trap this week.
You are invited to attend our cotton field day at the Virginia Tech Tidewater AREC on Thursday, July 20, 2017. The tour will begin promptly at 8:00 am, ending with lunch. The location is our research farm at 1045 Hare Road, Suffolk, VA. The event is free and open to the public, but pre-registration is required–please contact Gail White by phone at 757-657-6450 extension 430, or by email at email@example.com by July 10th. Private Pesticide recertification credits (cat. 90, 91) are being offered. More information will be made available in the upcoming weeks. Thank you.
The following advisory is posted on behalf of Dr. Steve Rideout:
Late blight was found on potato in Camden and Pasquotank counties in North Carolina over the weekend. We will be processing the samples to determine more information on race/fungicide sensitivity. In the meantime, growers are encouraged to scout their tomato and potato fields for the disease. Preventative fungicide applications are recommended, particularly near the outbreak area in NC.
If you have questions please let us know. You can access current recommended materials for late blight in the commercial and homeowner vegetable production guides. Also, you can visit the following web page for more information on this disease:
This is a serious threat to potato and tomato production in the Commonwealth. Please let us know if we can help.
The year’s first Virginia Potato Disease Advisory (by Dr. Steve Rideout), is attached as a pdf article: VPDAApril252017
In accordance with Section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act, the EPA has authorized the Emergency Exemption use of Transform WG (active ingredient = sulfoxaflor) to be used on sorghum to control sugarcane aphid (Melanaphis sacchari) in specified Virginia counties. The authorization will expire November 30, 2017. Foliar applications may be made at 0.75-1.5 oz/acre, with a maximum of 2 applications per acre per year. Please refer to the product’s Section 18 registration for further information, including application directions (at the time of this writing, the 2016 version of the Section 18 is the one available on cdms.net [the 2016 version expires on April 8]). Micah Raub and others with the Virginia Department of Agriculture and Consumer Services are acknowledged for their assistance.
We hope that you will be able to attend the meeting, “Soil Management/Soil Fertility Seminars for Row Crops” on March 16, 2017, from 9:00 AM – 12:00 PM at the Virginia Tech Tidewater AREC, 6321 Holland Rd, Suffolk, VA 23437. Here is the agenda:
9:00 AM – Introduction and Opening Comments, Dr. Hunter Frame
9:00 AM – 9:45 AM – Benefits of Conservation Tillage Systems/Introducing Cover Crops, Dr. Mark Reiter
9:45 AM – 10:30 AM – Nitrogen and Sulfur Management in Cotton Production, Dr. Hunter Frame
10:30 AM – 10:35 AM – Break
10:35 AM – 11:05AM – Nitrogen Management in Corn and Winter Wheat Production, Dr. Mark Reiter
11:05 AM – 11:35 AM – Potassium Fertilization Requirement for Full Season and Double-Crop Soybeans, Dr. David Holshouser
11:35 AM – 12:00 PM – Potassium Nutrition of Cotton in Virginia: A look at Timing, Rate, and Source, Dr. Hunter Frame
The following is being issued on behalf of Roy Flanagan, Virginia Cooperative Extension ANR Agent, Virginia Beach (meeting information and registration forms can be found on my January 30, 2017 blog). This is a reminder for folks to register if you plan to attend any of the 2017 Mid-Atlantic Strawberry Programs in Virginia Beach. The room block with Fairfield Inns and Suites filled up quickly, we have increased that group of blocked rooms at the special rate of $86 per night. If you tried to register and had issues, please email Roy Flanagan directly and he will get you in touch with the right person to get your room issues taken care of and get the reduced rate.
If you have questions, please contact Roy Flanagan.
Agriculture Extension Agent/ Virginia Beach
Office: 757-385-GROW (4769)
The following information is posted on behalf of Roy Flanagan, Virginia Cooperative Extension ANR Agent, Virginia Beach. The first attachment (a Word document) includes details on the Mid-Atlantic Strawberry Programs (Feb. 27-Mar. 1, 2017), and the second (a pdf file) is the registration form.