Do Not Overlook the Corn Values for Fall 2020 and Beyond. Increased Corn Acres and Demand Destruction could easily move the carryout back up over 2 Billion Bushels.



 

 

            
Board of Trade Hours    9:30 am to 2:15 pm
                                       7:00 pm to 8:45 am                              


  Monday, July 22, 2019   
 Home
 Cash Bids
 USDA Reports
 Calendar
 Real Time Quotes
 Local News
 Contact Us
 QUOTES & DATA
Weather
Futures Markets
Market News
Headline News
DTN Ag Headlines
Portfolio
Crops
Options
Charts
 
- DTN Headline News
Dicamba Injury Study
Thursday, July 18, 2019 2:09PM CDT
By Matt Wilde
Progressive Farmer Editor

COLUMBIA, Mo. (DTN) -- University of Missouri (Mizzou) research has shown that soybeans entering the reproductive phase are most vulnerable to injury from dicamba.

That reproductive time is now across the major production areas, according to the latest U.S. Department of Agriculture (USDA) Crop Progress and condition reports. Dicamba applications are ongoing in many states due to a late planting season and rule changes.

Weed scientists urge farmers and chemical applicators to communicate and follow label instructions to mitigate possible production losses associated with dicamba drift. The herbicide and weed management were dominant topics Tuesday at Mizzou's Pest Management Field Day at the Bradford Research Center in Columbia, Missouri.

"When (soybean) plants start to flower, they are most susceptible to yield loss (from dicamba)," said Mandy Bish, University of Missouri Extension weed specialist. "There's still a lot of dicamba being sprayed.

"Neighbors need to communicate with each other to find out what's planted where and come up with a game plan," she continued. "Applicators must follow the buffer and wind speed rules and even shut down spraying earlier than the label requires. Two hours before sunset may not be sufficient during weather that favors temperature inversions."

Studies show non-dicamba-tolerant soybeans in the R1 to R3 reproductive stage -- beginning flowering to beginning pod set -- sustain the greatest yield loss from drift. Multiple exposures exacerbate losses, research indicated.

University of Missouri testing last year showed soybeans injured by dicamba in the V3 stage produced 1 bushel per acre (bpa) more than non-injured beans after a single drift event. Injured soybeans in the R1 and R3 stages yielded 11 bpa and 7 bpa less, respectively, after a single drift event than non-injured soybeans. Injured soybeans in stage R5 only suffered a 2 bpa loss compared to non-injured soybeans. If soybeans sustained drift injury during the R1 and R3 stages, yields were half as much compared to non-injured soybeans.

"There's a difference getting drifted on once compared to many times," said Kevin Bradley, a Mizzou weed specialist. Tests show production losses escalate in soybeans sensitive to dicamba if drift injury occurs multiple times.

LATE START

Soybean planting occurred well into June or even July in some cases. Only 7% of Iowa's soybean crop was in bloom as of Sunday, July 7, according to USDA. That's 10 days behind the five-year average.

Six percent of Missouri's soybean crop is in bloom, according to the latest crop progress and condition report. Illinois is even less at 2%. Soybean progress is below average in most states.

Dicamba labels allow over-the-top soybean applications prior to beginning bloom (R1) or no more than 45 days after planting, or whichever comes first, for XtendiMax, Engenia and FeXapan. Tavium in-crop applications are allowed through V4 or 45 days after planting, whichever comes first.

Some states, like Iowa, follow federal label rules dealing with application timing. States with earlier dicamba application cut-off dates extended the time to spray due to the lack of suitable spraying days and delayed planting. For example, Illinois extended its June 30 cutoff date to July 15 for June-planted soybeans. Oklahoma filed a special local needs label to allow for in-crop dicamba use for 90 days after planting cotton and 60 days after seeding soybeans.

"If soybeans are flowering or in a later stage, people need to understand the yield loss due to injury can be much greater," Bradley said.

Dicamba injury symptoms tend to take at least 10 to 14 days to appear. DTN previously reported dicamba off-target injury complaints have started coming in to state agencies.

"It is important to note that not all dicamba injury results in yield loss," Bish said.

OTHER FIELD DAY HIGHLIGHTS:

Bradley said early studies indicate new 2,4-D choline formulations are not as volatile as reformulated dicamba products.

Bradley expects more herbicide options and flexibility for farmers in the future, including additional soybean traits with three-way tolerance.

A new University of Missouri study reveals farmers need to consider their cereal rye cover crop seeding rate in order to achieve the most effective weed control. Research shows seeding rates of at least 50 pounds of cereal rye per acre are required to suppress waterhemp, and preferably even higher.

When planting into green cover crops, research indicates farmers should wait to apply residual herbicide until cover crops start to deteriorate after burndown and soybeans reach to the V2 to V3 stage to be the most effective.

Dicamba-injured soybeans do not attract more insects, so there is not a greater increase in yield loss, research indicated.

University of Missouri entomologist Kevin Rice said Japanese beetle populations won't increase this year due to extensive rainfall and flooding, but injury thresholds could be reduced due to short plants.

Stink bugs may cause more problems this year since they like later-planted soybeans and late-maturing pods, Rice said.

Matthew Wilde can be reached at matt.wilde@dtn.com

Follow him on Twitter @progressivwilde

(PS/BAS/CZ)


blog iconDTN Blogs & Forums
DTN Market Matters Blog
Editorial Staff
Friday, July 19, 2019 12:15PM CDT
Monday, July 15, 2019 11:49AM CDT
Friday, July 12, 2019 12:27PM CDT
Technically Speaking
Editorial Staff
Monday, July 15, 2019 11:07AM CDT
Monday, July 8, 2019 8:53AM CDT
Monday, July 1, 2019 8:49AM CDT
Fundamentally Speaking
Joel Karlin
DTN Contributing Analyst
Monday, July 15, 2019 12:49PM CDT
Friday, July 12, 2019 7:54AM CDT
Thursday, June 27, 2019 10:23AM CDT
DTN Ag Policy Blog
Chris Clayton
DTN Ag Policy Editor
Friday, July 19, 2019 1:54PM CDT
Wednesday, July 17, 2019 12:03PM CDT
Tuesday, July 16, 2019 10:21AM CDT
Minding Ag's Business
Katie Behlinger
Farm Business Editor
Wednesday, July 3, 2019 2:19PM CDT
Wednesday, June 5, 2019 11:34AM CDT
Tuesday, May 28, 2019 3:02PM CDT
DTN Ag Weather Forum
Bryce Anderson
DTN Ag Meteorologist and DTN Analyst
Friday, July 19, 2019 3:06PM CDT
Wednesday, July 17, 2019 1:39PM CDT
Monday, July 15, 2019 12:11PM CDT
DTN Ethanol Blog
Editorial Staff
Wednesday, July 17, 2019 3:22PM CDT
Wednesday, July 17, 2019 1:34PM CDT
Tuesday, July 9, 2019 1:31PM CDT
DTN Production Blog
Pam Smith
Crops Technology Editor
Friday, July 5, 2019 2:08PM CDT
Thursday, June 13, 2019 4:47PM CDT
Thursday, June 6, 2019 5:22PM CDT
Harrington's Sort & Cull
John Harrington
DTN Livestock Analyst
Tuesday, July 9, 2019 2:22PM CDT
Monday, July 8, 2019 9:19AM CDT
Tuesday, June 11, 2019 3:25PM CDT
South America Calling
Editorial Staff
Tuesday, July 16, 2019 8:46AM CDT
Tuesday, April 23, 2019 2:43PM CDT
Tuesday, April 9, 2019 2:22PM CDT
An Urban’s Rural View
Urban Lehner
Editor Emeritus
Friday, July 19, 2019 12:53PM CDT
Wednesday, July 10, 2019 5:34PM CDT
Monday, July 1, 2019 2:01PM CDT
Machinery Chatter
Dan Miller
Progressive Farmer Senior Editor
Friday, July 12, 2019 12:03PM CDT
Tuesday, July 2, 2019 5:12PM CDT
Tuesday, June 25, 2019 11:24AM CDT
Canadian Markets
Cliff Jamieson
Canadian Grains Analyst
Friday, July 19, 2019 4:28PM CDT
Thursday, July 18, 2019 6:17PM CDT
Wednesday, July 17, 2019 4:21PM CDT
Editor’s Notebook
Greg D. Horstmeier
DTN Editor-in-Chief
Friday, July 19, 2019 5:43PM CDT
Wednesday, May 1, 2019 5:59PM CDT
Thursday, April 25, 2019 8:51AM CDT
 
Copyright DTN. All rights reserved. Disclaimer.
Powered By DTN