Plants under stress due to environmental factors, such as extreme temperature and moisture are more susceptible to disease, and many were under stress due to the unique environmental conditions in 2019.
Fungicide resistance was confirmed in soybean samples from 10 Nebraska counties infected with the frogeye leaf spot pathogen. Tar spot, a fungal disease of corn, has been confirmed in numerous western Iowa counties and is likely to reach Nebraska in 2020.
In 2019, wet weather during the growing season favored the development of numerous corn diseases including Physoderma brown spot, bacterial leaf streak, stalk rot diseases, and ear rot diseases. This update highlights these diseases, the environmental factors that favor their development, and their management.
Two closely related plant diseases — one in corn and the other in dry bean — have followed similar, but somewhat perplexing patterns of appearing, disappearing, and then resurging as a serious threat to crop yield. A UNL researcher looks at factors affecting the cycle and whether it can be predicted.
The effects of late planting and stressful growing conditions throughout much of the season are showing up now in poor stalk quality in corn. Growers are encouraged to scout fields and harvest those most at risk of lodging first. Here's why and what to look for.
Record rainfall during August and continued wet conditions into September are much to blame for the flush of diseases Nebraska’s soybean crop has been experiencing. Here are some of the most common diseases at this time and information on managing them.
Moderate to severe frogeye leaf spot is being reported on soybean in northeast Nebraska. Pathogen resistance to QoI fungicide is suspected in two fields. If you suspect resistance, contact the author for possible testing.