Soybean growers continue to look for ways to decrease input costs through herbicide program selection, unfortunately, herbicide resistant weeds continue to affect yield while new resistant biotypes continue to evolve due to limited post-emergent herbicide options. Modern soybean genetics, such as glyphosate (i.e. Roundup), dicamba (i.e. Xtendimax), glufosinate (i.e. Liberty), 2, 4-D, and HPPD (i.e. Callisto) tolerant soybeans, provide herbicide tolerance to increase post-emergence weed control options. However, misapplication and overuse of post-emergent herbicides has led to selection pressure in waterhemp populations. Soil applied residuals are effective as the herbicide is absorbed into the weed at the most vulnerable stage of growth, emergence.
This grant focuses specifically on providing an inclusive industry comparative program in target weeds waterhemp and giant ragweed and the objectives will be achieved through four studies included in the body of this grant: 1) Industry Programs on Waterhemp Control in Soybean; 2) Industry Programs on Waterhemp Control in Corn Utilizing Different Modes of Action than in Soybean; 3) Industry Programs on Giant Ragweed Control in Soybean; 4) Industry Programs on Giant Ragweed Control in Corn Utilizing Different Modes of Action than in Soybean. The studies have the same objectives with the exception of the target weed and crop which will impact treatment entries from industry. Each industry partner will receive two entry slots per trial. Research will be conducted on the research farm in Renville, MN, with seed and chemical provided by supporting industry partners.

1. GOAL : Achieve 95% control of target weed at soybean canopy.
OBJECTIVE #1: Visually evaluate weed control 14, 28, 42, 56 DAA, and at canopy.
2. GOAL : Feature eight industry partners in each target weed study.
3. GOAL : Provide Multi-Faucet Knowledge Transfer Opportunities
OBJECTIVE #1: Publish an article at year end to my website and supply to MSRPC.
OBJECTIVE #2: Take advantage of in-class and in-field speaking appointments with SMSU (Adam Alford) and MN Growers Ag Expo (MSRPC).

Evaluation of success will be determined by 1) objectives achieved; 2) no error application; 3) number of attendees at speaking appointments; 4) feedback from collaborators.

Update:
See uploaded file below.

View uploaded report

Update:
See attached final publications and data summaries. Ag Expo appearance will fulfill grant obligations.

View uploaded report

View uploaded report 2

Update:
See attached final publications and data summaries. Ag Expo appearance will fulfill grant obligations.

View uploaded report

View uploaded report 2

GIANT RAGWEED IN CORN AND SOYBEAN
Giant ragweed population was excellent for evaluations. Three inches of rainfall occurred within 4 days after corn preemergence application, while only 2 inches of rain occurred from preemergence application to last evaluation in soybean. Although, ragweed population and study vicinity were similar, the environment impact on the studies was largely different. In both cases, preemergence treatments had little initial impact, and inclusion of residual herbicides with post-emergence activity applied at the “B” applications were important. In the corn study, the added residual was necessary due to the likely washout of the preemergence residual products, while in the soybean the post-emergence activity from contact and systemic products was critical for eliminating the emerged giant ragweed that came through non-activated preemergence residuals. In both crops there is a plethora of programs demonstrated to assist growers that choose to use the data set as a guide to visit with their crop consultants or local suppliers and determine a giant ragweed program that provides the greatest control at an economical cost based on local supplier pricing and availability of products.

For full publication including data tables, analysis, and summary, or for more MSRPC funded research conducted by Next Gen Ag LLC can be found online at www.nxtgenag.com under the “Latest News” tab and “Public Grant Research Studies” page.

WATERHEMP IN CORN AND SOYBEAN
In general, waterhemp pressure was low and inconsistent making the data sets difficult to interpret in both corn and soybean, in both studies all treatments were similar to 100% control at crop canopy. Only 2 inches of rain occurred from preemergence application to last evaluation in both crops. Inclusion of residual herbicides with post-emergence activity applied at the “B” applications were important, as the activity from contact and systemic products was critical for eliminating the emerged waterhemp that came through non-activated preemergence residuals. In both crops there is a plethora of programs demonstrated to assist growers that choose to use the data set as a guide to visit with their crop consultants or local suppliers and determine a waterhemp program that provides the greatest control at an economical cost based on local supplier pricing and availability of products.

For full publication including data tables, analysis, and summary, or for more MSRPC funded research conducted by Next Gen Ag LLC can be found online at www.nxtgenag.com under the “Latest News” tab and “Public Grant Research Studies” page.

Outreach is a large component of this grant. Primary outreach achieved through 1) Publication; 2) Public speaking appointments (usually SMSU field day, Ag Expo, and slides provided for presentation at Prairie Grains in Grand Forks).