A summary of field crop disease and nematode management trials from 2017 is now available. Results for applied research on wheat, corn, cotton, peanut, and soybean can be downloaded below.
Knowing how much, if any, nitrogen you lost during large rain events is a difficult question. You need to consider when you applied nitrogen, your soil texture, your source, the rain event intensity, among other factors. Take a look at this publication for a few things to consider after an intense rain event following nitrogen fertilization: Nitrogen_Corn_5June2018.
Though it has been around for several years, the Crop Protection Network (CPN) has recently added several publications on disease management in corn, soybean, and small grains that are relevant to growers, crop consultants, and extension personnel in Virginia and the surrounding region. These can be accessed at the CPN website cropprotectionnetwork.org. As stated on the website:
“The Crop Protection Network (CPN) is a multi-state and international partnership of university and provincial Extension specialists, and public and private professionals that provides unbiased, research-based information. Our goal is to communicate relevant information to farmers and agricultural personnel to help with decisions related to protecting field crops.”
Extension specialists throughout the country (including myself) contribute to the publications and other resources posted on the website. An example of a recent publication on optimizing fungicide use for control of Fusarium head blight can be downloaded below. The CPN library includes over 30 publications on crop management, and additional publications are in development.
Charlie Cahoon and Michael Flessner, Extension Weed Specialists at Virginia Tech
Horseweed or Marestail
Horseweed is a winter or summer annual and a member of the asteraceae family. In the winter annual cycle, horseweed germinates in the fall and overwinters as a basal rosette. The following spring, the rosette bolts, reaching 1.5 to 6 feet in height. While most populations of horseweed in the region emerge in the fall, significant spring emergence can occur under certain conditions. Spring germinating horseweed does not form a rosette. Leaves are alternate, simple, linear to oblanceolate in shape, and lack petioles. Leaf margins are either entire or toothed. Flowers consist of numerous small heads arranged in a panicle with many white ray flowers and 20 to 40 yellow disk flowers. Seed are small and have a pappus of tan to white bristles (resemble dandelion seed). Seed are easily dispersed by the wind, allowing it to quickly spread to nearby fields and within fields.
Herbicide resistance: Regionally, glyphosate- and ALS-resistant horseweed are widespread. If you are unsure of the resistance status in your fields, assume resistance to glyphosate and ALS herbicides. Resistance to Gramoxone (PS I-inhibitor) has been reported in Delaware.
Management: Horseweed is more prevalent in no-till fields compared to fields prepared conventionally. Tillage can be useful in the long-term management of horseweed. Chemical control of horseweed is more consistent when the weed is in the seedling or rosette stage compared to bolting plants. Traditionally, glyphosate and ALS-inhibiting herbicides effectively controlled horseweed, however, biotypes resistant to these herbicides are wide-spread. Chemical control of glyphosate- and ALS-resistant horseweed requires a postemergence herbicide to control emerged horseweed and depending on application timing a residual herbicide for horseweed yet to emerge. Due to the prolonged germination period, horseweed seedlings can emerge 5 to 6 weeks after residual herbicide application, thus fall applications of residual herbicides often have limited effectiveness for spring emergence.
Herbicides used for emerged plants include 2,4-D (1 pt in the fall or 1 qt in the spring), dicamba, Liberty, Sharpen, or Gramoxone plus a triazine herbicide (atrazine or metribuzin). Preliminary research from Virginia and North Carolina suggest Elevore (a new auxin herbicide from Dow) also controls horseweed well. Fourteen days are required between Elevore application and corn or soybean planting and 30 days prior to cotton planting. Herbicides providing residual control include Valor SX, triazine herbicides (atrazine, simazine, and metribuzin), and ALS-inhibiting herbicides (if horseweed is not ALS-resistant).
Horseweed seedlings do not tolerate shade. Thus a well-established cover crop, or dense crop canopy can be very effective to manage horseweed infested fields.
Soybeans: The key to managing horseweed in in soybeans is to control it prior to planting. Horseweed needs to be controlled prior to bolting (grow upright); this may require an application weeks prior to planting. Glyphosate plus 2,4-D (1 qt/A), glyphosate plus dicamba or glyphosate plus Sharpen will effectively control glyphosate- and ALS-resistant horseweed when they are small. Pay attention to rotational restrictions of preplant burndown herbicides when planning burndown applications and planting. If horseweed are susceptible to the ALS-inhibiting herbicides, Classic-containing herbicides (i.e. Canopy, Valor XLT, Envive, Surveil) are effective. If applications are made early pre-plant, herbicides containing Valor SX or metribuzin or the Authority products can be included to provide residual control, or a second application of a non-selective herbicide may be needed at planting. Liberty or Gramoxone also control small horseweed and can be used as a part of the burndown application. If horseweed is present at planting, Gramoxone plus a residual product (Valor SX, Authority products, metribuzin, or Sharpen) is suggested in regions with later emerging horseweed. Foliar applied PPO-inhibiting herbicides (Blazer, Reflex or Flextar, Resource, and Cobra) DO NOT control emerged horseweed. For Liberty Link varieties, Liberty applied postemergence controls small horseweed. Classic and FirstRate are postemergence options where horseweed are susceptible to the ALS-inhibiting herbicides and are small.
Cotton: Like soybean, horseweed needs to be controlled prior to cotton planting. Burndown combinations of glyphosate plus 2,4-D/dicamba plus Valor SX is normally in order. Again, pay attention to plant-back restrictions when timing burndown applications. Glyphosate plus Sharpen is also effective, but requires a long waiting period between application and cotton planting.
Corn: In no-till corn, Gramoxone plus triazine, glyphosate plus atrazine plus 2,4-D or dicamba, and Liberty plus atrazine applied burndown of emerged seedlings and residual control of glyphosate- and ALS-resistant horseweed. Consult labels for waiting interval prior to planting corn. Atrazine alone will provide good residual control of horseweed. Dicamba and 2,4-D are the most effective postemergence herbicides. For small emerged horseweed, foliar applied HPPD-inhibitors or Liberty plus atrazine are effective.
Sorghum: Glyphosate plus Sharpen or Gramoxone plus a triazine applied burndown. Atrazine alone or in combination with Gramoxone applied preemergence for residual control and control of small emerged horseweed. Atrazine can be used postemergence for control of small horseweed. However, similar to corn, 2,4-D and dicamba are the most effective postemergence options.
Small grains: 2,4-D, dicamba, Quelex, or Huskie will provide effective postemergence control of horseweed in small grains. Harmony Extra is also very effective on small horseweed that is susceptible to ALS-inhibiting herbicides.
Fall fallow application: In fields with a history of horseweed, fall applied herbicides can be helpful in managing the weed. However, a fall herbicide application will not substitute for a spring burndown application. Target applications for emerged horseweed plants in the late fall after one to two killing frosts. 2,4-D or dicamba should serve as the base for these applications. Glyphosate is often suggested in combination with 2,4-D and dicamba to control other winter annual weeds.
To see similar information on other problematic weeds consult the Virginia Pest Management Guide: Field Crops at http://pubs.ext.vt.edu/456/456-016/456-016.html or the Mid-Atlantic Field Crop Weed Management Guide at https://extension.psu.edu/mid-atlantic-field-crop-weed-management-guide.
As always, don’t hesitate to contact Michael or myself with any questions or concerns.
On behalf of both the Virginia Soybean and Virginia Grain Producers Associations, I invite you to join me for the 2018 Virginia Grain and Soybean Annual Conference on February 20-21, 2018. The conference will span two days and is being held at the Richmond Westin Hotel to provide a convenient, comfortable and inviting environment for attendees and their families. In response to increased interest, this year the conference will have a greatly expanded exhibit hall providing a larger and more prominent space for exhibitors and attendees to network.
Continuing to honor your requests that we not include information that you received at the county and regional meetings, we continue to include exciting, innovative, and largely non-production oriented speakers. Furthermore, following the success of last year’s two-day program, the conference has added even more breakout topics, speakers, and programming to help you run a strong, profitable operation. The program will feature keynote speakers and topics certain to bring value to your operation, including: Smithfield Foods’ Chief Strategy Officer and Chief Commodity Hedging Officer Dhamu Thamodaran; The Port of Virginia’s Mid-Atlantic Area Manager Kara Matzko; and FBI Counterintelligence Training Center Special Agents Mark Betten and Matthew Seckers discussing the topic of intellectual property security and the agriculture industry.
As always, your registration includes all meals including a full dinner that will follow the networking reception Tuesday evening, giving you additional time to network and spend time with colleagues and speakers.
Click Here for Individual Registration
Click Here for Sponsorship Opportunities & Sponsors Registration
What’s on the Agenda?
Tuesday, February 20, 2018
10:30am Registration & Exhibitor Trade Show Opens
11:30am Lunch Buffet Opens
12:00pm Lunch & Commodity Market Speaker
Robert Harper, Grain Division Manager, Virginia Farm Bureau Federation
1:00pm Breakout Sessions – Choose One
Weed & Pest Management in Grain & Soybeans
Charlie Cahoon & Michael Flessner, Virginia Tech
Soil Health Strategies for Increased Yields
Chris Lawrence, NRCS Cropland Agronomist & Dr. Mark Reiter, Eastern Shore AREC
Opportunities & Challenges on the Horizon
Dicamba Update from Monsanto
Rapeseed & Organic Opportunities for a Profitable Rotation, Jeff riddell, Perdue AgriBusiness
2:15pm Break & Visit with Exhibitors
2:30pm Breakout Session Repeated – Choose One
3:45pm Break & Visit with Exhibitors
4:00pm Globalization of Agriculture & Commodities
Dhamu Thamodaran, Chief Strategy Officer and Chief Commodity Hedging Officer of Smithfield Foods
5:00pm Reception & Networking in the Exhibit Hall
6:00pm Awards Dinner
This includes corn and soybean yield contest winner presentations. Although we did not break Keith Brankley’s 2012 Virginia record of 109 bushels per acre, we did induct 3 new members into the 100-bushel club, 3 new members into the 90-bushel club, and 4 new members into the 80-bushel club. Of course David Hula and other corn farmers continue to break yield records in that crop – the number of winners is too large to list in this small space.
Wednesday, February 21, 2018
7:30am Breakfast Buffet Opens
8:00am Annual Meetings, Elections, and Reports
8:30am Updates from Secretary of Agriculture & Forestry Bettina Ring
Break & Visit with Exhibitors
10:00am Managing Security Risks in Agricultural Trade
Special Agent Matthew Seckers, FBI, Richmond Division and Special Agent Mark Betten, Unit Chief for the FBI’s Counterintelligence Training Center, FBI Academy, Quantico, VA
11:00am The Agriculture Industry and the Port of Virginia: Growing New Markets
Kara Matzko, Mid-Atlantic Area Manager, Port of Virginia
12:00pm Dicamba Training & Certification Lunchon
Chelsea Valenti, BASF Crop Protection
Where Can I Stay?
We have reserved a room block at the Richmond Westin at the discounted price of $129 per night. Reservations must be made on or before February 6, 2018 by calling 1-888-627-7786. Reference the “Grain & Soybean Annual Conference” rate. You may also visit:
The federal labels for XtendiMax® herbicide with VaporGrip® Technology (Monsanto), Dow DuPont ® FeXapan® herbicide Plus VaporGrip® Technology, and Engenia® Herbicide (BASF) now require additional training beyond a Pesticide Applicator’s License prior to use of these products “over the top” of dicamba-tolerant soybean or cotton. Training for 2018 will be provided by the registrants of the products (BASF, Monsanto, and Dow DuPont).
Agents/dealers interested in scheduling a training in their area or having a company representative deliver the training at an already scheduled meeting should contact the following company representatives:
Rest of Virginia
If you schedule a training with either BASF, Dow DuPont, or Monsanto, I would encourage you to make the other companies aware of the training planned in your area. That way, the companies can better coordinate their efforts to reach as many applicators as possible. Also, training by any of the three registrants will cover all dicamba products labeled for in-crop use to dicamba-tolerant soybean or cotton (applicators do not need to take training from the registrant of the specific dicamba product they intend to use).
In lieu of the face-to-face trainings, the companies also plan to have a web-based training that will satisfy applicator training requirements. Michael and I feel the face-to-face training will better prepare the applicators for the off-target challenges of dicamba. Web-based training can be used as a last resort if a grower is unable to attend face-to-face training. The following websites offer more information on web-based training:
There are a few trainings scheduled for the area. See the link below for an announcement from Monsanto for two training sessions in Suffolk, VA on Wednesday January 31st. BASF will be training applicators at the Virginia Grains & Soybean Conference (http://www.virginiagrains.com/annualconference/). The BASF training for this meeting is schedule for Wednesday February 21st at 12:00pm. I anticipate both companies to have other training; Michael and I will keep you updated as we receive word. Please help spread the word on these trainings, as many growers still do not know that training is required. Also,I would encourage you and your applicators to pre-register for the events so folks can plan accordingly.
With that said, feel free to reach out to Michael or me if you have any questions or concerns.
Please join us for Virginia Tech’s Eastern Shore Agricultural Research and Extension Center (ESAREC) 2017 Research Field Day on Wednesday, September 13th. 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. The field tour will begin at 9:00 AM and conclude with lunch at 12:30 PM. See the attached flyer for specific projects to be highlighted and more information.
If you would like more information or are interested in sponsoring this event, please contact Lauren Seltzer at 757-414-0724 ext. 11 or email at firstname.lastname@example.org.
As another reminder, the Virginia Ag Expo is Thursday, Aug. 3 at Renwood Farms in Charles City. The event opens at 7:30 am and will run through mid-afternoon.
There is something for all corn and soybean farmers in the field this year. Go on the field tour and you will be able to chat with Extension Specialists, company reps, and others about the research being conducted or anything else on your mind.
As always, the Ag Expo is home of one of our numerous on-farm corn hybrid and soybean variety tests. This year, you will view 31 corn hybrids from 11 companies and 47 soybean varieties from 14 companies. Drs. Mike Flessner and Charlies Cahoon will demonstrate off-site herbicide injury with some of our newest seed/chemical technologies. Dr. Wade Thomason is evaluating in-furrow and starter fertilizer in corn. The soil fertility team, led by Dr. Mark Reiter, is investigating fertilizer recommendations to ensure optimum production for high yielding soybeans. You will view one of Dr. David Holshouser’s seeding rate trials as he is in the process of establishing variable rate seeding recommendations. You will also see an experiment that you may have viewed at last year’s Ag Expo investigating the interaction of planting date with relative maturities. Companies are participating in our plots with in-furrow and foliar sprays that offer potential to enhance yield potential under high-yielding conditions. Finally, you’ll go below ground to view Virginia’s state soil, a Pamunkey loam, and discuss this yield contest-winning properties with NRCS personnel.
This is a walking, go-at-your-own-pace tour designed to fit your interest and schedule. Buses will be running continuously to take you to and from the plots. Enjoy!
Please note: the date for the Virginia Ag Expo is August 3, 2017.
“Focused on Productivity, Management and Stewardship” is the theme for the 2017 Virginia Ag Expo. The Virginia Ag Expo, hosted by the Virginia Grain Producers Association and the Virginia Soybean Association in partnership with Virginia Cooperative Extension, is the largest agricultural field day held in the Commonwealth of Virginia. As an educational, marketing and social event farmers and agribusiness look forward to the Virginia Ag Expo each year.
Renwood Farms, owned and operated by The Stanley Hula Family, will be hosting this year’s Ag Expo on August 3. The Hula Family’s farm is a diversified operation growing over 6,000 acres of corn, soybeans and small grains; along with seed conditioning and sales. A focus on management and productivity at Renwood Farms has produced the world record corn yield of 532 bushels per acre by David Hula. In addition, the USG soybean seed that produced the world record yield of 172 bushels per acre was grown and conditioned at Renwood Farms.
Over 150 exhibitors and sponsors will have on display all of the most up to date equipment, goods and services for agricultural producers and property owners no matter how large or small.
The event opens at 7:30 am. The field tour, starting at 8 am, is a walking, go-at-your-own-pace tour designed to fit your interest and schedule. Buses will be running continuously to take you to and from the plots.
Breakfast and lunch will be provided by Virginia food vendors. Attendees will be able to eat any time from 6:30 AM to 2:00 PM.
Renwood Farms is located at 17303 Sandy Point Road, Charles City, VA 23030.