Although the week of May 10 was seasonally cold; we made up most of that week's lost heat during the week of May 17. Corn planting is nearing completion across Iowa, and soybean planting is wrapping up in some regions as well. Corn fields should be monitored for black cutworm now, based on pheromone trap capture data.
Iowa State University
Pope, Richard O., "Degree Days - From a Brisk Week to a Balmy One" (2009). Integrated Crop Management News. 651.
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