A Purdue University Extension study found that the use of adjuvants on glyphosate resistance Palmer amaranth improved control, but was still well below commercially acceptable levels.
Kansas State University Extension provides some suggestions for controlling marestail, velvetleaf, pigweeds, sunflower and cocklebur weeds taller than 6 inches in Roundup Ready soybeans.
About 78% of growers said they were concerned or "extremely" concerned about resistant weeds. Nearly half the audience had been no-tilling for 15 years or longer.
Corn and soybean growers have an economic incentive to encourage management of glyphosate resistance instead of ignoring it, says USDA's Economic Research Service.
Growers should soon begin planning their program for controlling kochia, as the spread of glyphosate-resistant populations suggest that perhaps control measures should begin prior to emergence.
Missouri farmer Jerry Morris says no-till and cover-crop mixes helped him put CRP acres back into crop production and keep his sloping fields from suffering erosion.
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Franck Groeneweg, who no-tills a variety of crops on more than 12,000 acres near Three Forks, Mont., shares how his massive Johnson-Su bioreactor system allows him to apply compost extract in furrow during planting season.
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