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Showing posts from September, 2012

Watch For Potential Corn Ear Rots and Mycotoxins After Dry and Hot Weather in Parts of Minnesota

By Dean Malvick, Extension plant pathologist
Development of corn ear and kernel rots and associated mycotoxins in grain may have been favored by the dry and hot weather in some areas of Minnesota this summer. Although few problems with ear rots or mycotoxins seem to have been reported so far, only about 12% of corn was harvested in Minnesota as of September 16 and there is much grain to be harvested where potential problems may have occurred. Several different types of ear rots occur in Minnesota, but Aspergillus ear rot and Fusarium ear rot are of greatest concern because they produce mycotoxins and are favored by hot and dry conditions.

Tips for Planting Winter Wheat Late

The unusually warm summer this year now means that there are many acres that have been harvested that potentially could be planted to winter wheat. It appears that the lack of rainfall could be a deterrent to winter wheat planting, at least to getting it planted during an optimum period. Our current recommendations are to plant winter wheat in the northern half of Minnesota by the middle of September and the rest of the state by October 1st. Unfortunately, there does not appear to be any rain in the immediate forecast. Planting into dry soil and waiting for rain is a viable option. In this scenario, put the seed about an inch deep so that it will be able to emerge quickly once rainfall is received. Though seeds that just begin the germination process will vernalize (meet the necessary cold requirement to produce a spike in the summer), a much larger seedling typically has a better chance of overwintering and being more productive. In the last three years of our research, the early pl…