This year brought some notable disease problems to the corn crop, and it is surprising that the average yield for the state turned out as well as it did. Of course, I spend most of my time in the worst-looking fields so I usually have a pessimistic outlook. Significant disease problems in 1999 included seedling blights, Stewart's disease (Stewart's wilt), rusts, gray leaf spot, and stalk rots.
Iowa State University
Munkvold, Gary P., "Corn diseases in 1999" (1999). Integrated Crop Management News. 2154.
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