This year continues the chain of years with unusual harvest conditions driven by rapid weather changes in the latter part of the growing season. In mid August, crops were significantly ahead of schedule in terms of maturity. Heat and moisture in May and June accelerated the pace of development, to the point that signs of maturity were evident by the 15th of August. Rains followed by above average temperatures began over Labor Day weekend, and have been repeated nearly every weekend to date. The forecast for the weekend of October 7 is more of the same – very heavy rains with intermittent warm, sunny and high humidity periods. The 2018 crop is now at a point where the wet conditions are affecting quality.
Iowa State University
Hurburgh, Charles R. and Robertson, Alison E., "Crop Quality Hurt by Rains" (2018). Integrated Crop Management News. 2501.
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