Okay, you’ve seen plenty of lists that suggest ways to prevent or cope with herbicide resistance. This one is different. It starts with the way the wrong tank-mix combinations can make resistance worse, much worse.
Injury complaints skyrocketed in the soybean-heavy states of Indiana and Illinois in 2019. A regulatory group also requested EPA make any future registration of these herbicides “conditional on a year-by-year basis.”
Warmer temperatures and adequate moisture have set the stage for rapid weed growth in the coming weeks. Since very few weeds were present at the time of pre-plant tillage this year, timely and effective herbicide applications must do the heavy lifting in most weed management programs.
“If we don’t control weeds prior to planting, these weeds continue to grow, and they can be harder to control later. This is especially a problem with glyphosate- and ALS-resistant horseweed (marestail).”
Planting started early in parts of the state and preemerge herbicides went out ahead of rains that perhaps didn’t fall soon enough. Will the herbicides still work? Here’s an overview on possible outcomes and suggestions on post-emerge approaches.
Researchers looked at both Xtend and Enlist, and results varied by technology and season. “This is a reminder for growers who hold unrealistic expectations that new technology will always bail them out.”
In a couple of states, researchers are seeing slippage when dicamba is applied to certain Palmer amaranth populations. These survivors turn up in tightly controlled comparisons, not random field observations. Consider these findings a wakeup call that is ringing very faintly at the moment – yet we can’t afford to ignore it.
In Australia, new methods of weed control have evolved, and a group of American scientists toured the country’s ag production areas to see these systems in action. They came away with ideas about what might work now and which approaches deserve further evaluations.
Cotton prices plummeted with the onset of the pandemic, putting them at or below the cost of production. Looking for ways to survive, some growers are thinking about a “dirt cheap” way to manage this crop. But with prospects for sloppy pigweed control, can you afford to cut corners?
AgFax Weed Solutions is published by AgFax Media LLC. If you’re receiving this newsletter from us, either a friend or business contact asked us to forward the report to you or you are a regular subscriber to one of our crop, pest and issue-related reports covering states in the Corn Belt, South, Southwest and Far West.