Category Archives: Weed

Scout now for marestail/horseweed

Recent mild temperatures and the mild winter are setting the stage for rapid development of marestail/horseweed (Conyza canadensis) this spring.  Marestail was particularly troublesome last year in soybeans.  Marestail can germinate in both the fall and the spring. It is more likely to overwinter in the rosette stage during mild winters.  If you wait until your typical burndown the marestail may start bolting and therefore be more difficult to control. Adding to this difficulty, many marestail populations are resistant to Roundup (and other glyphosate containing products). You should scout your fields targeted for soybeans now to identify overwintering marestail.  Marestail control can be achieved with 2,4-D  or dicamba now and still offer plenty of time to avoid plant back restrictions (up to 15 days for 2,4-D or up to 28 days for dicamba). Glyphosate resistant weeds and the difficulty in controlling more mature weeds underscore the need to scout fields earlier and use some alternative herbicides in your program.  Always consult the product label for specific instructions.

View the Program: Virginia Eastern Shore Ag Conference and Trade Show

We look forward to seeing you January 25th and 26th at the 27th Annual Eastern Shore Ag conference & Trade Show! You can find the program online at: https://onedrive.live.com/?authkey=%21AEczhxLIHkUCwmY&cid=05F6B732110DB231&id=5F6B732110DB231%2129963&parId=5F6B732110DB231%21813&o=OneUp. Virginia pesticide re-certification and Certified Crop Adviser credits will be available. See the program for more information.

The event will be held at the Eastern Shore Community College Workforce Development Center, 29300 Lankford Highway, Melfa, VA 23410. When you enter the driveway to the Community College, we will be meeting in the building to the left.

The Annual Oyster Roast will be held on Wednesday night, January 25th beginning with a social at 6:00 pm and oysters served at 6:30 pm. Along with oysters, there will be all-you-can-eat barbecue, sides and beverages. Tickets will be $35.00 in advance and $40.00 if purchased the day of the oyster roast.

If you have any questions or concerns please contact either Theresa Pittman (tpittman@vt.edu) or Ursula Deitch (ursula@vt.edu) for accommodation. Thank you!

Virginia Cooperative Extension logo

Virginia Eastern Shore Ag Conference and Trade Show

Join us in Melfa, VA for the 27th Annual Eastern Shore Agricultural Conference and Trade Show on January 25-26, 2017. This event is free, open to the public, and will be held at the Eastern Shore Community College Workforce Development Center. We will offer Virginia Pesticide Recertification credits for categories 1A, 10, 60, and 90. We will also offer Certified Crop Adviser Credits for nutrient management (2), soil and water (1), integrated pest management (4.5), crop management (6), and professional development (0.5). Click on the following link for topic areas being presented: ag-conf-press-release-2017

Wild Mustard and Wild Radish

This fall I have noticed quite a few fields plagued by wild mustard/wild radish.  These species are difficult to control primarily due to size at burndown time.  Some of the fields I have passed are already knee high and I would suspect very difficult to control now, let alone next spring.  The 7 day weather outlook is showing a warming trend with temperatures peaking near 70 degrees on Saturday.  This would be a good time to get ahead of wild mustard/wild radish.  My first suggestion for cleaning up these field would be Roundup plus 2,4-D.  Although the risk of injuring neighboring plants is less this time of year, it is not absent.  If you do decide to treat with this combination, please pay attention to what susceptible plants may be around.  Below is an article that goes more in depth about management of wild mustard/wild radish I authored for the 2017 Mid-Atlantic Field Crop Weed Management Guide and Virginia Pest Management Guide.  Excerpts similar to this one covering additional weed species can be found in both of the aforementioned publications.  Feel free to contact me with any questions or concerns.

problem-weed-mustard-and-radish

Dicamba Registered for Cotton and Soybean

Last week Monsanto received EPA registration for XtendiMax with Vapor Grip Technology for use on XtendFlex cotton and Roundup Ready 2 Xtend soybean.  Attached is an article authored by Dr. Alan York at NC State pertaining specifically to cotton.  I share Dr. York’s sentiments concerning this technology and will echo these same points at winter meetings.

york-dicamba-article

 

New Label for Sandea on Cucumber

Gowan has a new supplemental label for Sandea on cucumber, allowing for a 14 day pre-harvest interval.  This label will be on the bottle next production run, but for the time being growers wanting to use the supplemental label will need to have a copy of the supplemental label on file.  This new label will replace the 24c (Special Local Needs label) label that covers the same use.  If you have any questions do not hesitate to contact me.  Below is the supplemental label.

Sandea 81880-18 cucumbers (aprvd 5-11-16)

 

 

Screening for Herbicide-resistant Italian Ryegrass

Italian ryegrass is one of the most troublesome weeds infesting small grain fields throughout Virginia.  Currently, only Hoelon-resistant ryegrass has been confirmed in Virginia.  However, many growers have complained the ALS-inhibitors (Osprey and PowerFlex) and Axial XL (ACCase-inhibitor) have failed to control ryegrass.  To get a better handle on herbicide-resistant Italian ryegrass in Virginia, the VT weed team plans to screen ryegrass from across the state for herbicide resistance.  Year 1 of the project will focus on the I95 corridor east.  We will be traveling this area and collecting ryegrass seed for herbicide screening this fall.  However, if you have had complaints of resistant ryegrass in your neck of the woods and are interested in screening it this year, we welcome your samples and will add them to our screen this fall.

If you are interested, see the sample information sheet below for sample, handling, and shipping information.  For the sample, GPS coordinates are critical.  If you have any questions, feel free to contact me.

HR Ryegrass Sample Info Sheet

“One year to seed; seven to weed”

26th Annual Eastern Shore of Virginia Ag Conference & Trade Show

The Eastern Shore of Virginia Ag Conference & Trade Show is on! We are snow free, and looking forward to a great event on January 26 and 27, 2016. The event will take place at the Eastern Shore Community College Workforce Development Center in Melfa, VA. The full program can be found at: http://issuu.com/esarec/docs/flipbookfinal/1. We have been approved for Certified Crop Adviser (CCA) CEU credits (details at: https://www.dropbox.com/s/f34f3spg4quni7a/CCA_Credits_Handout_2016.pdf?dl=0), Virginia Nutrient Management Credit (1 credit), and Virginia Pesticide Recertification credits (information in the program). See you there! Directions can be found at: http://es.vccs.edu/about/mapdirections/.ESCC

Eastern Shore Ag Conference & Trade Show

Join Virginia Tech, Virginia Cooperative Extension, the Virginia Association of Potato and Vegetable Growers, and Industry to hear updates, research information, and innovative products for grain, oilseed, and vegetable crops important to Virginia’s Eastern Shore on January 26 and 27, 2016. This event is free and open to the public. Announcements concerning conference updates, weather delays and/or closings, etc. will be made at: https://www.facebook.com/EasternShore.Soils. Highlights of the program can be found in the attached flyer.

Ag Conf Press Release 2016

Eastern Shore AREC Specialist Day

Join us next week, November 17th, at the Eastern Shore AREC (33446 Research Drive, Painter, VA, 23420) for Weed Science Specialist Day.  Topics will include new herbicide technology and control of herbicide-resistant Italian ryegrass in wheat.  The event will begin at 10:00am and conclude at 12:00pm.  Lunch will be served promptly following the meeting.  Please RSVP to Ursula Deitch (ursula@vt.edu) or Theresa Long (tmjlong@vt.edu) by Friday if you are interested.  See the below flyer for more details.

Specialist Day will be held at the Eastern Shore AREC on Tuesday Nov. 17th.

Specialist Day will be held at the Eastern Shore AREC on Tuesday Nov. 17th.