The 2020 University of Missouri virtual weed science field day kicked off early in the month with the launch of a five-minute video: Evaluating Non-chemical Control Options for Waterhemp in Soybean.
The video summarizes preliminary research on early-season waterhemp emergence in the spring following fall harvest treatments that included:
Seed destruction inside the combine.
Narrow window burning of residue.
A cereral rye cover crop following both approaches.
Plus, un untreated check plot.
A heavy waterhemp infestation covered the test site.
This is set to be an ongoing multi-year research project. In part, it considers a worst-case scenario when waterhemp has gained resistance to a wide range of commonly used herbicides. As it is, populations with 6-way resistance have been identified in the state.
Going forward, the project will include an electrically based “weed zappyer” system now marketed in Europe.
Mandy Bish, Extension Weed Scientist, conducted the study and outlines her findings.
The next video is slated to launch on Tuesday, July 14th, and will feature Ph.D. student Eric Oseland discussing UAV sensors as potential tools for detecting yield loss in soybean following injury due to synthetic auxin herbicides.