Here is your latest issue of AgFax Weed Solutions, sponsored by Nufarm's Midwestern and Southern field teams.
 
Web Editor: Ernst Undesser

IN THIS ISSUE...

   

Editor's Picks

  • Hyper Resistance? This Waterhemp Defies 6 Modes Of Action. Is Palmer Next?

  • Australians Facing Slippage In Key Resistance Management Strategy
  • Robotic Weeding - Teaching Them The Difference Between Friends And Enemies
  • Herbicide Resistance: 7 Steps Towards Management

Focus On The Corn Belt

  • South Dakota - Palmer Pigweed Materializes, Vigilance Required
  • Pennsylvania: Fighting 2019's Palmer, Waterhemp Starts At Harvest
  • Kansas: Kochia Gains Cross Resistance To Key Herbicides
  • South Dakota: Put Time Into Marestail Control Now
  • Nebraska: Extension Weed Science School Set For Oct. 31

Focus On The South

  • Louisiana: You Can't Afford To Ignore Fall Burndown Programs
  • Tennessee Wheat: Weed Management Considerations
 
 
Will Palmer pigweed follow a similar trajectory towards more forms of resistance? That's a concern. See 6 practices that can help hold that in check with Palmer and other problem weeds.
 
    
 
 
The "double knock" herbicide approach has run into trouble in the country's cotton belt states as paraquat resistance emerges in a second weed species.
 
    
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Prototype weeding robots
 
So-called "machine learning" will determine whether a system has be practical value in a farmer's field or is just a neat idea. The University of Illinois, with USDA funding, melds a host of sciences to put weeds in the crosshairs.
   
  
 
Resistant weeds have a way of sneaking up on you. At first, it might look like an escape or a maybe small patch of weeds that survive. Eventually, it becomes the dominant type of that weed in the field. It’s “survival of the fittest” in fast forward.
 
    
 
This is serious stuff. The trick is to stay on top of Palmer, learn from everyone else's mistakes and not make matters worse. How's that for an assignment? 
 
    
 
If you chopped silage earlier and think you've controlled Palmer pigweed, think again. Palmer doesn't need to be a few feet tall to develop a seed head in the fall. Even plants less than a foot tall can still set seeds that will carry over to next year's crop -- only in a bigger way. Here are fall options.
 
    
At this point, weed scientists can’t say to what extent this co-resistance will lead to a “fitness cost” among these populations. So far, kochia populations that show resistance to dicamba and fluroxypyr tend to produce fewer seeds and grow less aggressively.
 
    
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According to research, 20% to 91% of marestail seeds that germinate in the fall can survive through the winter. That's how they get you.
 
    
 
Weed identification, cover crops to suppress weeds in corn/soybean cropping systems, effect of ultra-micro rates of dicamba on soybean yield, and management of herbicide drift will highlight the afternoon session.
 
    
 
Some weeds are capable of setting viable seed within 30 days after emergence duringearly fall. Post-harvest weed control is especially important when combating glyphosate-resistant weeds such as Palmer amaranth, waterhemp or johnsongrass. Problem fields should be identified and receive top priority for preventing seed return to the soil seedbank.
 
    
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Wheat
 
Weed control in wheat has become more of a struggle in recent years. Here are quick tips for dealing with 3 key problems - volunteer Roundup Ready corn, bluegrass and resistnat ryegrass. 
 
    
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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.


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