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Extension > Minnesota Crop News > July 2010

Friday, July 30, 2010

Sudden Death Syndrome of Soybean: Favorable Conditions and Request for Samples

By Dean Malvick, Department of Plant Pathology, St. Paul.

This growing season has been favorable for development of sudden death syndrome (SDS) in Minnesota. This disease is developing earlier than normal in my research plots in Waseca, and I expect it to become obvious soon in many soybean fields. The earlier it develops the more potential it has to cause significant yield loss. SDS has been spreading and we are requesting help to determine where it occurs in Minnesota. SDS has been concentrated in south central Minnesota in past years, but it could occur almost anywhere in the state.

Thursday, July 29, 2010

Soybean Disease Update - What is Here and What is Developing?

Dean Malvick, Department of Plant Pathology, St. Paul

The soybean crop is growing well across most of Minnesota. As of July 25, 80% of the state's ~7.4 million acres of soybeans was flowering and 25% was setting pods. Most of the soybean crop in Minnesota was rated in good (58%) or excellent (27%) condition. With the frequent rains this season, however, disease problems are appearing in some fields and others may be brewing. The leaf diseases downy mildew, bacterial blight, and Septoria brown spot are common now in Minnesota, but fortunately none of these diseases typically cause significant yield reductions. Many areas in Minnesota have also had favorable conditions for development of Phytophthora root and stem rot, stem canker, white mold, and sudden death syndrome.

Friday, July 9, 2010

The Plant Disease Clinic at the University of Minnesota is Here to Help With Your Crop and Plant Disease Problems

by Dimitre Mollov and Jennifer Flynn

When crops or plants are not growing well and look diseased or less vigorous than healthy plants, an accurate diagnosis of the problem may be critical to reducing and managing it. The Plant Disease Clinic at the University of Minnesota in St. Paul is open year-round to diagnose crop and plant problems and to assist with other plant testing questions. The Plant Disease Clinic welcomes samples from anyone and offers a wide variety of diagnostic and testing services.

Thursday, July 1, 2010

Now is the time to finalize postemergence weed control in soybean

By Jeff Gunsolus

After the recent stretch of rainy weather we are currently in a period of excellent conditions for finalizing postemergence weed control in soybean.  As crop stages progress, postemergence soybean herbicide options decrease due to growth stage or days before harvest restrictions.
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