Herbicide resistance continues to be a growing concern among no-tillers. Not only are more weeds developing resistance, but some herbicide-resistant weeds, such as Palmer amaranth and waterhemp, are also very difficult to control if not caught early.
What are some tactics you can employ around harvest time to help prevent weeds from replenishing the weed seed bank and giving you more headaches for years to come?
As the calendar moves through the summer months and postemergence herbicides are applied to late-planted crops, it's a good time to review some research on the effects of high temperatures on Group 27 herbicides.
This article, which originally appeared in Ohio's Country Journal, discusses key questions to ask about weeds that seem to have thwarted the sprayer pass. Answering a few simple questions could save you time and money, particularly when deciding whether to spring for a whole new type of herbicide versus adjusting your equipment.
The transmission of palmer amaranth via manure (frequently ingested via contaminated feed) has been previously reported, researchers wrote. However, past research has used a variety of methods to identify amaranth seeds discovered in manure.
The University of Nebraska's Panhandle Research and Extension Center conducted studies in 2020 and 2021 to quantify yield loss and potential seed production of Palmer amaranth when competing with dry beans season-long.
Rigorous testing by Arkansas weed scientists has detected the first-ever documented case of broadleaf resistance to glufosinate, says the University of Arkansas.
The so-called “true armyworm” is one of the more frustrating early-season pests no-till corn growers encounter periodically, particularly if they are planting into small-grain or other grassy cover crops, or in fields near sources of grassy weeds.
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