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Abstracts: 2014 January Research Updates for Ag Professionals

Sessions at Waseca, Kasson, Lamberton, Willmar, and Morris

It is time to take action against herbicide-resistant weeds

Dr. Jeff Gunsolus

The United Soybean Board has been working with Extension Weed Scientists in the mid-western and southern states to develop the herbicide-resistance management education strategy, "Take Action." You will note strong ties to University of Minnesota Extension's "Take Control" theme. These educational strategies focus on the four following subject areas: Weed Out Resistance; In-Field Tactics; Spray Attention; Managing the Bottom Line. To weed out resistance it is important to know your weeds, their biology and herbicide resistance characteristics. In the field, rotating and using multiple herbicide sites of action, rotating crops and incorporating cultivation are important. When applying herbicides, know the properties of your selected herbicides, know how these herbicides respond under various environmental conditions, and know your adjacent neighbors sensitive crops as you develop plans to manage drift. The bottom line is to help the farmer manage risk by understanding the cost-benefit of various weed management practices and the costs associated with poor weed control.

Recent weather patterns and their influence on crop diseases, and research updates

Dr. Dean Malvick

This presentation will focus on the influence of weather patterns on crop diseases as well as research updates for several different corn and soybean diseases. Recent weather patterns have influenced (both positively and negatively) development of crop diseases. We will discuss crop disease development patterns over the past few years and what the patterns may tell us about future risk of major diseases. In addition, information will be presented on recent outbreaks and research on Goss's wilt, corn rusts, possible red root rot of corn, sudden death syndrome, Rhizoctonia and white mold on soybean, and seedling diseases and fungicidal seed treatments for soybean.

Emerging insect problems: Resistance and invasive species

Dr. Ken Ostlie and Dr. Bob Koch

Targets of pest management can change through time. Existing pests are evolving to overcome management tactics and new pests are invading Minnesota. This presentation will provide updates on resistance and resistance management, and the status of some new invaders.

Potential and limitations for nutrient management with remote sensing

Dr. Dan Kaiser

New tools are being research for making fertilizer recommendations in real time. Remote sensing is increasingly being looked at as a way to better manage crop nutrients to reduce losses to surface and ground waters. Passive sensors that measure reflectance of ambient light have been available for years but have not been developed for use in Minnesota while active sensors that emit their own light source have been increasing in the marketplace. While both sources have been researched there have been limitations in their development for use in Minnesota. This presentation will highlight some of the research data on the use of active and passive sensors in Minnesota as well as where their limitations have arose within this research. There also will be a discussion on what nutrient deficiencies can be seen with these sensors and how multiple nutrient deficiencies may affect the sensors and potential implications for making nutrient management decisions.

Sessions at Crookston

Small grains update

Dr. Jochum Wiersma

In this presentation the results of the state variety trials for spring wheat and barley will be presented and strength and weaknesses of new public and private releases will be discussed. The presentation will include an in depth discussion on yield stability and economic returns.

The view from up here—UAVs in entomology

Dr. Ian MacRae

The use or remote sensing and UAVs will be discussed. In addition, this past season's sugarbeet root aphid epidemic will be discussed.

Small grains disease research update

Dr. Madeleine Smith

Will discuss the latest results of trials conducted in 2013 related to seed treatment trials for root rots and stem rust control. Discussion of up and coming research and things to look out for in 2014.

Nutrient management for soybean: issues for Northwest Minnesota

Dr. Dan Kaiser

Soybean is an important crop grown in rotation in Northwestern Minnesota. Fertility management decisions have generally been made for other crops rotated with soybean assuming that soybean can acquire needed crop nutrients from the soil. Due to high commodity prices questions have increased as to direct fertilizer applications to soybean especially for phosphorus and potassium that are needed in higher quantities. While the response to phosphorus has been known, fine textured soils have typically been thought to be high in available potassium. As the number of years a field is cropped to soybean has increased more questions have arose about the status of soil potassium in Northwestern Minnesota. In addition, the repeated use of glyphosate has resulted in a greater awareness of micronutrients (except for Iron Deficiency Chlorosis) in Minnesota as well as across the United States. In this presentation the results from several research projects conducted over the last five years in Minnesota on fertility management for soybean will be discussed to highlight where the current nutrient management guidelines compare to data from more recent phosphorus, potassium, and micronutrient fertilization studies.

Small grain weed control update

Dr. Beverly Durgan

In this presentation the results of the 2013 small grain weed control research trials will be presented and strength and weaknesses of various small grain herbicides will be discussed. This presentation will recommend weed management strategies based on experience and extensive research conducted by University of Minnesota Extension.

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