Displaying episodes 1 - 30 of 34 in total

When Pests Bite Back

Dr. Tom Peters, Weed Scientist and Sugarbeet Agronomist with U of MN Extension and NDSU, discusses how irresponsible herbicide applications could backfire, and several pre-harvest strategies to prevent waterhemp escapes from replenishing the seedbank. Also, be sure to consider glyphosate-resistant volunteer corn when managing herbicide-resistant weeds. Bruce Potter, U of MN IPM specialist, discusses the status of soybean aphid populations, and the value of using the economic threshold. Other insects discussed include spider mites and corn rootworm.

Corn and soybean disease: Strategies for effective management in 2022

Dr. Dean Malvick, U of M Extension plant pathology specialist and crops program leader and professor of plant pathology discusses corn and soybean diseases he has observed and what might yet appear in 2022. Since it was first found in Minnesota in 2019, the fungal pathogen that causes tar spot in corn has spread from southeastern Minnesota to as far north and west as Stearns County in three growing seasons. Tar spot-related topics included scouting strategies and identification, when symptoms are likely to be observed, and what research has told us regarding proper active ingredient and application timing for managing tar spot with a foliar fungicide.

Getting ready for late-season insects

Dr. Robert Koch, U of M Soybean Extension Entomologist, and Bruce Potter, U of M Extension IPM Specialist discuss soybean and corn insects to keep an eye out for as we move into August. Soybean aphid populations have overall been low this year, but there are pockets of increasing population. Scouting is vital to determine where issues may be or if treatments aren’t needed. Other insects discussed include soybean gall midge, spider mites, and corn rootworm.

Corn pollination, atrazine herbicide use, and July insect updates

Dr. Jeff Coulter, U of M Extension Agronomist, updated us on the current status and outlook of corn pollination. Significant progress across much of the state should be occurring in the next week, though because of variable planting dates, it is difficult to generalize how upcoming hot weather will affect the overall crop across the state. Currently projected highs in the lower 90s should not cause significant pollination issues.Seth Dibblee, Environmental Scientist with the EPA, was on to discuss current news with atrazine. Atazine is a widely used post-emergence herbicide with about 33% of planted acres having an application in 2021. Currently, there are water quality concerns with atrazine that the EPA is proposing to address by adding restrictions to reduce runoff, such as disallowing use on saturated soil. A public comment period is open until Sept. 6, 2022 at: https://www.regulations.gov/search?filter=EPA-HQ-OPP-2013-0266. Dr. Anthony Hanson also gave a quick update on insects in early July. So far, soybean aphid hasn’t reached economic thresholds across much of the state, but populations are starting to increase in some areas. Whether it’s soybean aphid or other insects, be sure to check the insecticides are actually approved. Chlorpyrifos application , even if it’s in possession from a previous year, is no longer allowed for any agricultural use.

The latest regarding risks for and management of iron deficiency chlorosis (IDC) in soybeans

Drs. Dan Kaiser and Seth Naeve discussed iron deficiency chlorosis (IDC) in soybean on today’s episode. IDC is a result of the plant not being able to take up sufficient amounts of iron, which results in leaf yellowing with leaf veins remaining dark green. Kaiser and Naeve discussed soil conditions across the state that can result in IDC that result in high pH conditions that limit the availability of iron such as compaction and soil drainage.

Corn Rootworm Current Status, etc. and crop disease update/fungicides

The months of July and August typically brings new challenges for corn and soybean growers in Minnesota. In this week’s episode, Bruce Potter, Extension Integrated Pest Management Specialist and Andy Nesseth, part owner, Agronomist/Consultant from Extended Ag Services of Lakefield, MN provided an update and reviewed management strategies for corn rootworm in Minnesota. Because of the delayed spring planting season and resistant corn rootworm populations, Minnesota corn growers face numerous field by field management situations for adequate corn rootworm control. Bruce and Andy discussed the use of field traps and scouting as part of these management strategies along with recommended crop and Bt hybrid rotations. The last portion of the program included Dr. Dean Malvick, University of Minnesota Extension Plant Pathologist for corn and soybeans. Dean provided an update of the biology and cultural control of corn tar spot, SDS (sudden death syndrome) in soybeans, white mold, and frog eye leafspot in soybeans. Dean also reviewed the possible use of fungicides for some of these diseases in terms of proper application timing.

Corn nutrient status and herbicide application in hot weather

In this episode, Brad Carlson, water resources extension educator, and Dan Kaiser, extension nutrient specialist, discussed nutrient availability in corn, especially nitrogen based on previous crops, use of urea, and other nutrients, such as sulfur. Joe Ikley, Extension Weed Specialist at North Dakota State University also discussed weed and herbicide interactions in the recent hot weather we’ve been having. Drought-stressed weeds have a tendency to produce more protective cuticle, so additional carrier or surfactant is often needed to get herbicide active ingredient penetration into the plant. Anthony Hanson gave updates on insect issues occurring in mid-June, such as true armyworm and alfalfa weevil.

Managing soybean insects and weeds in June

The month of June typically brings new challenges for soybean growers in Minnesota. In this week’s episode, Dr. Bob Koch, Extension Soybean Entomologist and Bruce Potter, Extension Integrated Pest Management Specialist provided an update and reviewed management strategies for soybean aphids, grasshoppers and soybean gall midges. Because of the delayed spring planting season, soybean aphids are not present in significant populations but as the weather heats up there are some scouting procedures and insect biology to be aware of this spring. In addition to soybean insects the subject of alfalfa weevils was also discussed. The last portion of the program included Dr. Tom Peters, Extension Surgarbeet Weed Specialist for Minnesota and North Dakota. Tom provided an update of the Section 18 label for Ultra Blazer to control emerged broadleaf weeds in sugar beets which has similar weed control strategies for use in soybeans as well especially for other Group 15 herbicides. Tom also provided a review of the utility of pre emergence herbicides in terms of residual weed control as to longevity. We also reviewed current cutoff dates/crop stages and best application methods for growth regulator and glufosinate herbicides.

Prevent Plant and Late Planting Decisions

Although much progress has been made, there are still fields farmers have not been able to plant yet, or areas that may need to be replanted. In this week’s episode, Dave Bau, Extension Educator in Ag Business Management, highlights the Delayed Planting and Replanting Evaluator, a tool to aid in the decision of whether or not to plant a crop yet, take prevent plant, or replant. Farmers can customize results by using expenses from their own operation. Dr. Seth Naeve, Extension Soybean Specialist, also discusses caveats around the June 10 date to switch soybean maturities, and how best management practices are still recommended even when planting late. With crop development behind, keep an eye on rotational restrictions on herbicide labels, and note the looming June 12 cutoff date for dicamba products labeled for use on dicamba-tolerant soybeans south of I-94 in MN.

Early Season Weed Control and Field Scouting Tips

June weed management was the focus of the first half of this week’s episode with U of M Extension Weed Scientist Debalin Sarangi. Late planting has likely helped some weed management where clean fields are likely the result of late tillage that especially helps with some weeds, such as giant ragweed. Pre-emerge herbicides will still be important for extended control of waterhemp. Dr. Anthony Hanson, U of M Field Crops Integrated Pest Management Extension Educator, also discussed scouting for insects. Be sure to get an estimate across an entire field of how severe an infestation may be. Insects can especially be aggregated in fields where a small area may have an entirely different stand or insect count than the rest of the field. Be on the lookout for black cutworm and alfalfa weevil in the next few weeks. For more information on scouting, visit: https://cropprotectionnetwork.org/virtual-crop-scouting-school.

Delayed Planting, It’s been a late spring, Now What?

Delayed planting and high soil moisture issues for existing plantings were the focus of this week’s episode with UMN Extension Agronomists Drs. Jochum Wiersma (small grains), Jeffrey Coulter (corn) , and Seth Naeve (soybean). Many areas of the state are still dealing with wet conditions, especially northwestern and west-central regions. While delays are decreasing potential yield, current crop prices may help buffer some of the effects of those delays. Growers should discuss with their insurance agent what options they may have for prevented plant acres. Areas with heavy flooding or erosion immediately after planting are a concern in central MN, especially for corn, so now is a time to assess plant stand and health. For information on common issues to avoid with herbicides in delayed planting, visit: http://farmdoc.illinois.edu/field-crop-production/weeds/emerging-crops-and-delayed-pre-herbicide-applications.html PDF version if link does not work: https://drive.google.com/file/d/1a06W0ALTu4kxS6LlnwR8mTDpXJrndeHj/view?usp=sharing

Early season weed control

This episode featured special guest Debalin Sarangi, Extension weed scientist. Hosts are Dave Nicolai, Ryan Miller and Dr. Jared Goplen. This session discusses the growing season thus far and the impact on weed control.

2022 Weather and Pest Outlook

This episode featured special guest Dennis Todey, Director of the Midwest Climate Hub in Ames, Iowa in addition to Bruce Potter, UMN Extension IPM specialist and Dr. Jeffrey Coulter, UMN Extension Corn Agronomist to discuss the weather and pest outlooks for the 2022 growing season. This session discusses the growing season thus far, which has been slow, with cool and cloudy conditions. As a result, planting progress has been slow despite precipitation being close to normal in much of Minnesota. Southerly winds have also brought some migratory insect pests like Black Cutworm and Armyworm moths up into Minnesota. However, the long range forecast predicts a shift to warmer and drier conditions into the summer months.

Making Cover Crop Decisions (8/25/21)

This episode featured Anna Cates, Extension soil health specialist, Liz Stahl, Extension educator - crops, and Troy Salzer, Ag production systems educator in St. Louis County to discuss potential cover crop options for this fall and next spring given the dry conditions.

Late-season disease issues and soybean agronomics (8/18/21)

This episode featured Drs. Dean Malvick and Angie Peltier to talk about current disease issues in the state. Dr. Seth Naeve was also online to discuss soybean agronomy as the growing season begins to wind down.

Evaluating Weed Control in 2021 (8/11/21)

This episode featured Drs. Debalin Sarangi, Extension weed management specialist and Tom Peters, Extension sugarbeet agronomist to discuss what worked and what didn’t for weed control in 2021. We discussed some of the observations across the state and in the research trials this year, and how that can be used to help improve weed control in 2022.

Late-season insect and mite issues (8/4/21)

This episode featured Dr. Ken Ostlie, Corn Extension Entomologist, and Dr. Bob Koch, Soybean Extension Entomologist, both with the University of Minnesota Department of Entomology as well as Bruce Potter, IPM Extension Specialist based out of Lamberton, MN.

Forages in a Drought (7/28/21)

This episode featured Dr. Craig Sheaffer, University of Minnesota Forage Agronomist, Nathan Drewitz, Extension Educator in Stearns, Benton, and Morrison counties, and Troy Salzer, Extension Educator in St. Louis County to discuss management of alfalfa, corn silage, and alternative forages in a drought.

Bonus Episode: Dicamba vs. 2,4-D – a tale of cupped leaves? (7/16/21)

This episode featured featured Drs. Debalin Sarangi, Extension weed management specialist, Tom Peters, Extension sugarbeet agronomist, Seth Naeve, Extension soybean agronomist, and Bruce Potter, Integrated Pest Management Specialist, to discuss cupped soybean leaves. Cupped soybean leaves are no rarity in Minnesota; however, the number of fields with cupped, wrinkled, and or strapped soybean leaves in 2021 is quite extraordinary.

Midsummer Crop Fertility Update: Tissue Testing and Nitrogen Needs (7/14/21)

Our University of Minnesota Extension staff: Dr. Dan Kaiser, Extension Soil Specialist and Brad Carlson, Extension Educator in Nutrient and Water Quality discussed the proper use of diagnostic tools such as crop tissue testing and nitrogen basal corn stalk testing to provide a checkup on current crop growth and nutrient needs in Minnesota.

What’s up with Corn and Soybean Diseases? (7/7/21)

This episode featured Dr. Dean Malvick, Extension plant pathologist, and Dr. Angie Peltier, Extension Educator-crops in northwestern MN, to discuss corn and soybean pathogens. This is the time of year where growers may be considering fungicide options or if they are needed, especially as soybeans enter flowering stages when white mold infection may occur. With the dry conditions, fields with soybean cyst nematode may also be more noticeable than in previous years. Being in a drought does not mean diseases will entirely go away. This episode discusses which diseases will likely be problematic this year, and what management considerations may be needed.

Insect Management in Dry Weather (6/30/21)

This episode featured Dr. Ian MacRae, University of Minnesota Extension Entomologist, and Bruce Potter, Extension IPM specialist, to discuss insect management issues to be on the lookout for this year. Hot and dry conditions can mean we may see different pest complexes than most years, such as spider mites and grasshoppers. Regulatory changes for insecticides, such as chlorpyrifos, are also pending and could significantly affect what insecticide options growers have left to use this year.

Early season crop water use and drought stress (6/23/21)

Dr.'s Seth Naeve, Jeff Coulter, and Vasudha Sharma discuss current soybean and corn growth, development, water use, and irrigation for Minnesota crops.

Weather and Pest Updates (6/16/21)

This episode featured Dr. Dennis Todey, Director of the USDA Midwest Climate Hub, and Bruce Potter, Extension IPM specialist, to discuss weather and pest updates. Dr. Todey discussed the current, short- and medium-range outlooks for precipitation and temperature. Bruce Potter gave updates us on pest activity, including alfalfa weevil, corn rootworm, soybean gall midge and spider mites.

Weed Management and Small Grain Update (6/9/21)

This episode featured Drs. Debalin Sarangi, Extension weed management specialist, Tom Peters, Extension sugarbeet agronomist, and Jochum Wiersma, Extension small grains specialist, to discuss postemergence herbicide applications and early season weed control challenges in addition to an update on small grains in Minnesota.

Side dressing (6/2/2021)

This episode featured University of Minnesota Extension Specialists, Dr. Dan Kaiser, Dr. Fabian Fernandez, Dr. Jeff Vetch, and Dr. Melissa Wilson to discuss Nitrogen fertilizer considerations on corn as side dressing operations start up throughout the state.

Bonus – Freezing Temperatures? (5/28/21)

This bonus episode featured University of Minnesota Extension Specialists, Dr. Jeff Coulter, Dr. Seth Naeve, Dr. Jochum Wiersma, and North Dakota State University Extension Agronomist Dr. Hans Kandel to discuss the recent freezing temperatures and what that means for crops in northern Minnesota and North Dakota.

Alfalfa Production (5/26/21)

This episode featured University of Minnesota Extension Educator, Nathan Drewitz, who works in Stearns, Benton, and Morrison Counties, to discuss the Alfalfa Harvest alert program, which collects scissors-cut samples from throughout parts of Minnesota to monitor the ideal cutting time for alfalfa. This episode talks about the status of alfalfa this year, as well as some of the interesting environmental and insect issues that have come up in areas of the state.

Stand Establishment and Early Season Scouting (5/19/21)

This episode featured University of Minnesota Extension Agronomists Dr. Seth Naeve, Dr. Jeff Coulter, and Dr. Jochum Wiersma to discuss early season stand establishment and scouting of soybeans, corn, and small grains. This year has brought some interesting early-season conditions in some areas of the state. Now is the time to evaluate crop stands to ensure we maximize our yield potential this year.

Weed Management with the Dry Conditions (5/12/21)

This episode featured special guests Dr. Debalin Sarangi, University of Minnesota Extension corn & soybean weed specialist, and Dr. Tom Peters, University of Minnesota sugarbeet weed specialist, to talk about weed control this year and how the current spring weather and soil condition might influence our management decisions.

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