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Looking Back at 2010 to Provide Clear Vision for 2011

Sep 21, 2010

Gordon Vail

As harvest gets underway, it’s interesting to reflect on comments growers and retailers made about the 2010 growing season and what practices to maintain or change going into 2011. Here are some thoughts my colleagues heard in Iowa this season.
 
Weed Control
“Glyphosate alone just isn’t cutting it anymore.” That was the general concern of every grower and retailer when talking about tough broadleaf weeds like waterhemp, lambsquarters, marestail, velvetleaf and giant ragweed.
 
Retailers said they will continue to push their customers to be proactive about weed resistance management by encouraging the use of pre-emergence herbicides in corn and soybean, which will help lessen the rate of glyphosate required post-emergence, widen the window for glyphosate application, add additional modes of action to a grower’s weed control program and protect yield potential by managing early-season weed competition.
 
Others will recommend post-emergence herbicide premixes in corn and soybean that contain glyphosate and ingredients that provide residual control. Some will also suggest tank mixing a residual broadleaf corn herbicide with glyphosate for more effective weed control and another mode of action for weed resistance management.
 
Insect Management
Some predict an increase in the use of corn insecticides due to the adaptation of corn rootworms. “Rootworm corn is great, but it isn’t the end-all be-all to corn rootworm,” one retailer said. “Last year, we dug roots into August and still had rootworm larvae hatching and feeding.”
 
Disease Protection
Finally, as diseases such as grey leaf spot, anthracnose and rust start to make an appearance, growers are considering the benefits of fungicide application in both corn and soybean and are putting out strip trials that will be evaluated at harvest.
 
What did you learn from the 2010 growing season that you will incorporate into your 2011 crop plans?
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