Stevan Knezevic - Extension Weed Management Specialist
November 30, 2020
Hemp exhibited relatively good tolerance to heat from propane flaming. Temporary injury could be considered acceptable since it was only at the base of the plants and lasted only for about two weeks.
November 18, 2020
Hemp exhibited high level of sensitivity to most of the tested herbicides. Visual injury levels ranged from almost no injury (~5%) with only one herbicide, to some temporary injury (~20%) with a few herbicides and severe injury or death (60%-93%) with about 10 out of 18 herbicides tested.
November 11, 2020
Hemp exhibited relatively good tolerance to several products that can be used postemergence in industrial hemp. It is important to note that the conclusions are based only on one year of data. This study will be repeated in 2021 season.
October 29, 2020
On Oct 27, 2020, The United States Environmental Protection Agency (USEPA) announced a new 5-year registration for XtendiMax® and Engenia, and re-registered Tavium (a premix of dicamba and S-metolachlor).
October 7, 2020
Herbicides registered for in-season weed control in industrial hemp are scarce, or nonexistent. To help with this issue, a greenhouse study was conducted this summer at the University of Nebraska-Lincoln to test tolerance of three industrial hemp varieties to preemergence herbicides commonly used in corn and soybean.
July 8, 2020
Nebraska legalized industrial hemp in 2019, which created much interest in researching various aspects of hemp production, including weed control. A recent study looked at hemp tolerance to 18 soil-applied herbicides commonly used for preemergence weed control in corn or soybean.
June 6, 2020
On June 8, 2020 the EPA release a statement providing farmers with needed guidance following the Ninth Circuit Court ruling.
June 5, 2020
The United States Court of Appeals for the Ninth Circuit issued a ruling on June 3, 2020 that immediately cancelled the registration of XtendiMax®, FeXapan®, and Engenia® primarily used in dicamba-resistant soybean, also known as Roundup Ready 2 Xtend® soybean.