Dr. Giesler provides statewide leadership for extension plant pathology programs in soybeans and turfgrass diseases. He is the team leader for the Extension Plant Pathology Team which is a Nebraska group of extension Plant Pathologist responsible for disease management programs throughout Nebraska. His main program focus is in soybeans and has included research projects on Bean Pod Mottle Virus, Soybean Cyst Nematode, Foliar Diseases and seedling diseases including Phytophthora root and stem rot. He conducts disease management studies on soybean to evaluate the efficacy of soybean seed treatment fungicides and foliar products. He served as a national leader for identification of soybean rust, coordinator for national soybean rust sentinel monitoring efforts from 2003 through 2012, and toured South America rust fungicide efficacy trials in 2004 and 2005. Dr. Giesler is currently working on several studies on soybean cyst nematode to improve management programs for this significant pest of soybean. Through continued support of the Nebraska Soybean Board a free soil sampling program for SCN is operated in his program that provides soybean farmers a way to determine if SCN is present in their fields.
Taking quality soil samples to test for SCN is part science and part art. The science is in how the samples are taken, while the art is in where they're taken to capture the best snapshot of SCN conditions. You'll want to consider these recommendations for getting the most from your SCN sampling this fall.
Sudden death syndrome often appears in small patches of a field and can be confused with injury from brown stem rot. This story and two field videos examine SDS symptoms and how to differentiate it from other diseases. Once confirmed in a field, management begins with seed selection for the next crop.
As conditions heated up the last two weeks, the fungus causing phytophthora root and stem rot became active in irrigated fields and those fields that received significant rain over the past couple weeks. Growers are encouraged to scout for this disease and, if found, manage through seed selection and treatment for the next crop.
Frogeye leaf spot is occurring in Nebraska soybeans, particularly in the eastern third of the state. While some fields have minor levels, some have significant levels and a fungicide treatment may be needed.
Cool, wet conditions in May may be contributing to soybean seedling injury from disease. Scouting is recommended to identify diseases and differentiate injury from that caused by herbicides when determining potential stand loss.
Dr. Giesler has disclosed a significant financial interest in membership and management of Field Screen, LLC. Field Screen, LLC has received compensation in the last 12 months for pesticide testing from the following companies: BASF, Bayer Crop Science, Syngenta Crop Protection, Arysta Life Sciences, Valent U.S.A. Corporation and FMC Corporation. In accordance with its Conflict of Interest policy, the University of Nebraska-Lincoln’s Conflict of Interest Review Committee has determined that this must be disclosed.
Field Screen, LLC is a company that specializes in disease efficacy testing for developmental fungicides in southeastern Missouri under extremely conducive environmental conditions for disease development. This outside activity provides Dr. Giesler with additional insight into agricultural chemical development and improves his ability to assist farmers and commercial agricultural clientele with their management decisions. Outside business activity is encouraged at the University of Nebraska as a way to improve faculty insight and promote economic development.