Corn ear abnormalities have been noted the past few years. Tracing back the information on various field calls often pointed to a misunderstanding of proper growth stages when making post-emergence herbicide applications in addition to pre-tassel fungicide and insecticide applications.
As of May 31, 2020, Nebraska corn planting was complete and soybeans planted was 95% according to the USDA’s National Agricultural Statistics Service. Planting and emergence of both crops continues to be ahead of five year averages.
Planting conditions seemed to be “perfect” this year. This allowed a large percent of corn and soybean acres in Nebraska to be planted earlier than in previous years. Because conditions seemed so good, the question is why emergence has been uneven in some fields this year.
After a frost, or hail event, the dead tissue is not able to resurrect itself and is eventually sloughed off as the plant continues to grow. Thus a common question is how do I determine corn growth stage when I can no longer count leaves?
As of Sunday, May 24th, corn and soybean planting and emergence continues to be well ahead of the five year average, according to the USDA's National Agricultural Statistics Service. In addition, 70% of winter wheat is rated is rated good to excellent.
Application of soil residual herbicides is important because they deliver a few weeks of residual weed control and aid in weed resistance management by incorporating additional site(s) of action in herbicide program. Several residual herbicides can be applied after corn emergence without injury to corn.