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Extension > Minnesota Crop News > June 2017

Thursday, June 29, 2017

Register now for the Field School for Ag Professionals

By Dave Nicolai, IAP Program Coordinator

2017-field-school
View video to learn more about Field School.
Registration for the 2017 Field School for Ag Professionals, July 27 - 28 is now filling up. Please register soon to save your spot for this popular annual agronomy training. The Field School will be held at the University of Minnesota Agriculture Experiment Station, St. Paul Campus, University of Minnesota which is located in Falcon Heights, MN next to the Minnesota State Fairgrounds at Larpenteur and Gortner Ave. The two-day program focuses on core principles in agronomy, entomology, weed and soil sciences on the first day to build a foundation for participants and builds on this foundation with timely, cutting-edge topics on the second day.

2017 Corn and Soybean Weed Management Tour

by Lisa Behnken, Ryan Miller, and Phyllis Bongard

weed-management-tour
Weed management has changed dramatically in recent years with herbicide resistant weeds, new herbicide technologies and challenging weather conditions. How do we develop resilient strategies to deal with all of the different challenges? The 2017 Corn and Soybean Weed Management Tour will highlight ongoing research that addresses these challenges for crop producers and other ag professionals on Thursday, July 6. The event will begin at the Heintz Center Atrium in Rochester, MN with registration at 8:30 a.m. followed by a 9:00 a.m. program and research plot tours from 10:30 a.m. to approximately 12:30 p.m.

Wednesday, June 28, 2017

Assistance with European corn borer survey requested

by Bruce Potter

european-corn-borer
European corn borer
Entomologists at the University of Minnesota continue to document and understand changes in European corn borer (ECB) populations in our state. Each fall, a number of corn fields are surveyed for the presence of corn borer damage and overwintering corn borer larvae. During the growing season weekly updates of ECB moth captures in black light traps are made available: https://www.vegedge.umn.edu/moth-data/ecb-info. Funding from the Minnesota Corn Research and Promotion Council has provided us an opportunity to improve these efforts.

Tuesday, June 27, 2017

The PSNT from Field to Lab: How to Ensure Accurate Results

Daniel Kaiser and Fabian Fernandez

Once you’ve taken the soil samples in the field, it’s time to send them to the lab for analysis. Good soil management from field to lab is imperative to getting accurate results from your samples. Watch Extension Soil Fertility Specialist Dan Kaiser explain best management practices for the PSNT test from the field to the lab, and read on for more advice.


‘Lang-MN' wheat is newest U of MN release

Lang-MN-HRSW
Lang-MN, the newest hard red spring wheat variety released by the University of Minnesota.
The University of Minnesota has released a new hard red spring wheat variety called ‘Lang-MN’ and dates for touring demonstration plots are now available. Released in January 2017, Lang-MN is a well-balanced, high yielding spring wheat variety well suited for much of the spring wheat-growing region. Lang-MN is named after Ben Lang, past president of the Minnesota Crop Improvement Association (MCIA).

Friday, June 23, 2017

What do we know about the value of preemergence herbicides in soybean?


By Ryan Miller and Lisa Behnken

Earlier this spring we shared a couple videos on the lessons we have learned from corn herbicide research at Rochester, MN.  Now we would like to share what we have learned about the value of preemergence herbicides in soybean.  See or video Soybean Preemergence Herbicides: Always Have One Down https://youtu.be/o5z-FXrW8y0

We are back in the research plots in Rochester, checking-in to see what we have been learning with our soybean herbicide research plots.  During the past couple of weeks, we shared information on the “reach-back” potential of several preemergence corn herbicide products.  In our soybean plots, we experienced similar weather conditions with a lack of rainfall after the applications of preemergence herbicides.  With that lack of rainfall, the herbicides were slow to activate and we saw an initial flush of weeds emerge, but unlike some of our corn herbicides the soybean preemergence products did not exhibit “reach-back”.  Not to worry, the preemergence herbicides have now activated and are “reaching forward”.  We see that the herbicides are now helping to control future flushes of small seeded broadleaves and grasses, reducing the overall weed pressure.  In addition, they have widened the window of postemergence herbicide application.  Without a pre down we needed our post emergence herbicide applications to go on four days after soybean emergence, with pre’s down we had several weeks to get the post applications on.  We will be following this trial during the 2017 growing season and providing periodic video updates.

If you like content in this format please subscribe to our YouTube channel: https://www.youtube.com/user/UMNCrops. For other information from University of Minnesota Extension crops, visit z.umn.edu/crops.

Wednesday, June 21, 2017

Suspect pesticide drift? What to do and how to prevent it from occurring

By Dave Nicolai and Liz Stahl, University of MN Extension Crops Educators

Unfortunately, pesticide applications can sometimes drift onto neighboring crops and vegetation. Damage can range in severity from brief cosmetic symptoms to the inability to market a crop, severe yield losses and/or plant death. Bee kills can also be an issue where pesticide misuse, misapplication, or drift has occurred. The Minnesota Department of Agriculture (MDA) has developed standard procedures to follow when pesticide drift is suspected.

2017 Southern Small Grain Field Days

The University of Minnesota Extension is holding four small grain field days in southern Minnesota June 26 - 27. Each field day will take place at on-farm locations to discuss all aspects of small grain production, including variety performance, plant diseases, and small grain management considerations. Events will include hands-on demonstrations in real field scenarios, with discussion relating to the current growing season. Presenters will include Jochum Wiersma, U of MN Extension Small Grains Specialist and Jared Goplen, U of MN Extension Educator in Crops. Attendees are encouraged to bring any field samples for diagnostics and discussion.

Dates and Locations include:

Monday, June 26, 2017 @ 1:00 PM – Ruth Hoefs/Ron Pomiji Farm, 20676 340th Street, LeCenter – Lunch served at the farm prior to the plot tour.

Monday, June 26 @ 5:00 PM – Gieseke Farms, 53031 Co Hwy 15, New Ulm – Lunch served at Schell’s Brewery following the plot tour.

Tuesday, June 27 @ 1:00 PM – Dave Lochen Farm, 10455 Haus Road, Marty – Lunch served at Pearl Lake Lodge prior to the plot tour.

Tuesday, June 27 @ 7:00 PM – John Gorres Farm, 1065 80th Ave SE, DeGraff – Refreshments served at the trial site.

NOTE: There is no charge and registration is not needed.

Questions about the 2017 South Small Grain Field Days can be directed to Jochum Wiersma, Extension Small Grains Specialist, via email: wiers002@umn.edu, or by calling (218) 281-8629, or Jared Goplen, Extension Educator-Crops, via email: gople007@umn.edu or by calling (320) 589-1711

The Supplemental Nitrogen Worksheet for Corn: a tool for in-season nitrogen management decisions

Greg Klinger, Fabian Fernandez & Dan Kaiser 

Wondering whether you should apply supplemental nitrogen to your corn fields this year? Find your answer with University of Minnesota Extension’s Supplemental Nitrogen Worksheet for Corn. Meant to be used in early to mid-June, this useful tool asks 3 simple questions of growers and provides a score that rates the need for additional nitrogen fertilizer.  High scores mean that supplemental N should be applied, medium scores suggest taking a “wait and see” approach, and low scores mean no supplemental N should be needed.


Thursday, June 15, 2017

Tips for Accurate Pre-Sidedress Nitrate Tests

Fabian Fernandez and Daniel Kaiser

The pre-sidedress nitrate test (PSNT) is a tool for making decisions on supplemental nitrogen application. Taken during June prior to side-dress N application around the V6 stage of corn growth, the PSNT offers a way to assess insufficient N in the soil. It offers guidance for efficient N management, but only if carried out correctly. Watch our video with Extension Nutrient Management Specialist Fabian Fernandez and read on for tips to make the PSNT count.


Wednesday, June 14, 2017

Temperature inversions: Something to consider before spraying

By Ryan Miller and David Nicolai

temperature-inversion
Fog developing in an early morning temperature inversion. Source: Ryan Miller
We have produced a video, Temperature inversions: Something to consider before spraying (https://youtu.be/jG10vCT1POg), that discusses the development of temperature inversions, which can affect the drift, or off target movement of pesticides during post emergence applications. Issues relating to temperature inversions and how they develop is summarized below. This content comes to us from neighboring land-grant universities (see references for detailed source information).

Tuesday, June 13, 2017

The downstream effects of hail on pest management

Bruce Potter and Dean Malvick

hail-damaged-corn
Hail-damaged corn, Renville County, June 11, 2017. Photo: Matt Wordes
Hail has hit a several areas of Minnesota, including Southwest Minnesota. For those that have not yet seen the article, U of MN Extension recently released revised information on assessing damage and yield loss: Hail damage to corn and soybean. For some farmers and their advisers, the damage is severe or light enough that decisions are easy. For others, in a couple days there will be indecision and a desire to try to help the crop out.

Monday, June 12, 2017

Hail damage to corn and soybean: Evaluation and replant options

by Jeff Coulter and Seth Naeve, Extension Agronomists, and Dave Nicolai, Extension educator

hail-damaged-corn
Photo 1. Hail-damaged corn in Kandiyohi County, June 11, 2017. Photo: Wes Nelson, USDA-FSA
Recent storms left a large area of western and central Minnesota affected by severe hail damage. Especially hard hit were Kandiyohi, Swift, Chippewa, and McLeod Counties, where much of the corn was at the V5 stage (5 collared leaves) when damaged and soybean varied from newly-emerged to two fully-developed trifoliate leaves (V2).

Thursday, June 8, 2017

Lessons learned from preemergence corn herbicide research this spring

by Ryan Miller and Lisa Behnken

corn-preememergence-trial
Last week, we shared a video on Spring herbicide activity concerns (https://youtu.be/dKX5JY2rvgQ) due to cool and wet conditions following preemergence corn herbicide applications. In the video, we noted that weeds were coming through and wondered if the preemergence herbicides that had been applied would do their job.

Wednesday, June 7, 2017

Wet spring weather and nitrogen loss: what has happened to my pre-plant nitrogen?



Gregory Klinger, Fabian Fernandez & Daniel Kaiser

Much of the state has seen periods of very wet weather this spring, especially in southeastern and central Minnesota. Given the heavy precipitation, what – if anything - has happened to spring pre-plant nitrogen? How much N is still available to the plant? Here are the top six things to consider when assessing pre-plant nitrogen loss:

Tuesday, June 6, 2017

A Brief Review of Key Soybean Seedling Diseases

by Dean Malvick

Conditions are favorable for soybean seedling disease in many areas. Wet soil, slow emergence, and delayed planting have been favorable for seedling diseases in many areas of southern and central Minnesota.  Now as the soil dries and warms up, infected plants may wilt and collapse rapidly due to damaged root systems. Problems with seedling disease have been reported from several areas, and more will likely be noted as plants continue to emerge. Given that seedling diseases have developed in some of the well-drained soil at Rosemount, MN, these problems are not restricted to poorly-drained fields this year.  This is a good time to scout fields for seedling disease problems.



Monday, June 5, 2017

Disease in small grains: When to spray, what to spray, when not to spray!

by Madeleine Smith, Small grains Extension pathologist

winter-wheat
Photo: Jared Goplen
Now that Memorial Day weekend has passed and the warmer weather seems to be here at last, many small grains fields are ready for their herbicide application. As always, the question arises, should I include a fungicide as good insurance against leaf disease and what should I spray? In Minnesota it helps to think of fungicide decision making in broadly three time categories.

Thursday, June 1, 2017

Crop disease diagnosis and plant health: The U of M Plant Disease Clinic is ready to help

by Brett Arenz, Plant Disease Clinic director

plant-disease-clinic
The improvement of plant health (and yields) can only be successfully achieved after a clear understanding is made of what is reducing plant health in the first place. This is where the Plant Disease Clinic (PDC), can help. The PDC is based on the St. Paul campus at the University of Minnesota. It provides diagnostic services, specializing in microbial pathogens of plants. The PDC diagnoses thousands of samples each year from state and federal agencies, the agriculture and horticulture industry, and the general public. We are also part of the National Plant Diagnostic Network (NPDN) which monitors and tracks the movement of plant pathogens in the U.S.

Pest alert: Scout for armyworm in fields with cover crops

Bruce Potter, IPM specialist

true-armyworm
Figure 1. Armyworm larva. Note the banding on the prolegs. Photo: Bruce Potter
A true armyworm infestation at a treatment threshold level was reported in corn yesterday. In addition, there have been several comments about slugs in corn and soybeans. The common variable in these infestations appears to be winter rye cover crops.

At this point, the reported observations are limited so it’s unknown how severe or widespread any problems are. Both of these pests could be occurring over a wide geography.
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