Category Archives: Weeds

Post-emergence herbicides for corn and soybean

Liz Bosak, Outreach Specialist, Department of Agronomy At this time of the year, integrated weed management programs focus on scouting and diversifying management practices including non-chemical methods and herbicide sites-of-action. For more information, please visit the United Soybean Board’s TakeAction … Continue reading

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Pigweed Identification

Liz Bosak, Outreach Specialist, Department of Agronomy, University of Wisconsin-Madison Weed identification at the seedling and immature stages can be difficult but is often necessary because scouting should occur before weeds reach 4 inches in height. At emergence before a … Continue reading

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Which thistle is in my pasture and how to control it…..

Mark Renz Extension Weed Specialist; University of Wisconsin-Madison & Extension Thistles are all up and actively growing. While we have a variety of thistles, typically pastures have one of 5 common weedy thistles in Wisconsin. Not sure which one? The … Continue reading

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Pre-emergence Herbicides for Weed Management in Soybean

Liz Bosak, Outreach Specialist, Department of Agronomy, University of Wisconsin-Madison Pre-emergence herbicides can lower the risk of developing herbicide resistance and add flexibility to the post-emergence application timing. For an excellent discussion of how a two-pass herbicide program can reduce … Continue reading

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Scout your fields for weed seedlings this spring

Liz Bosak, Outreach Specialist, Department of Agronomy The fields may look cold, wet, and dormant this week but weeds were germinating in some fields in Janesville and Arlington last week. On April 17 at Janesville, common lambsquarters, giant ragweed, and … Continue reading

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2015 Weed emergence “on target” in Wisconsin

Mark Renz Extension Weed Scientist, Agronomy Department, University of Wisconsin-Madison Knowledge of weed emergence is very important as it help in the selection and optimization of early season weed control. While typically weed emergence is consistent from year to year, … Continue reading

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Common ragweed confirmed ALS inhibitor-resistant in Brown County Wisconsin

Recently, Thomas Butts, a graduate research assistant, Vince Davis, and Dave Stoltenberg confirmed that a common ragweed population in Wisconsin is resistant to an ALS inhibitor. Here is the conclusion from their research paper (linked below) which stresses resistance management … Continue reading

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5 Free apps for Wisconsin crop production

by Roger Schmidt, IPCM computer specialist These five free apps help Wisconsin farmers and crop consultants quickly do calculations and find answers concerning crop and pest management. The apps all use University of Wisconsin science and research-based information sources. By … Continue reading

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Palmer amaranth confirmed glyphosate-resistant in Dane County, Wisconsin

Thomas Butts, a graduate research assistant, and Vince Davis report a new confirmation of a glyphosate-resistant weed in Wisconsin. Their full report is available here. For more information, please visit the WCWS documents page.

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Glyphosate resistance confirmed in two Wisconsin common waterhemp populations

Recently, Thomas Butts, a graduate research assistant, and Vince Davis confirmed two herbicide-resistant common waterhemp populations in Wisconsin. The full report is now available. For more information, please visit the WCWS documents page.

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