Category Archives: Weeds

Weed Identification Series, Waterhemp and Palmer Amaranth

Mark Renz UW Madison Associate Professor and Extension Specialist Concern about the continued spread of waterhemp and Palmer amaranth exist in Wisconsin. While invasion of these species has been much higher in adjacent states, populations are expanding in Wisconsin and … Continue reading

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Weed Identification Series, Wild Buckwheat

Mark Renz UW Madison Associate Professor and Extension Specialist, Chelsea Zegler UW Madison Associate Research Specialist Wild buckwheat is also known as black-bindweed or false buckwheat. While this species has been in Wisconsin for well over a century and documented in … Continue reading

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Weed Identification Series, 3 Biennial Thistles

Mark Renz UW Madison Associate Professor and Extension Specialist, Chelsea Zegler UW Madison Associate Research Specialist We wanted to emphasize Wisconsin’s common weedy biennial thistles in this weed identification series installment.  While Wisconsin has dozens of different thistles, we have three … Continue reading

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Row Spacing and Seeding Rate and Effects on Weed Management

Shawn P. Conley, Ph.D., Soybean & Wheat Extension Specialist Pigweeds are among the most abundant and troublesome weed species across the Midwest and Midsouth because of their prolific seed production capacity and their ability to rapidly evolve herbicide resistance. This … Continue reading

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Weed Identification, 2017 Series, Horseweed

WEED IDENTIFICATION SERIES PLANT #2 Horseweed Mark Renz UW Madison Associate Professor and Extension Specialist (mrenz@wisc.edu), Chelsea Zegler UW Madison Associate Research Specialist (zegler@wisc.edu) Weed species #2 that we wanted to emphasize this spring is horseweed, also known as marestail. This … Continue reading

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Weed Identification, 2017 Series, Common Chickweed

Mark Renz UW Madison Associate Professor and Extension Specialist (mrenz@wisc.edu), Chelsea Zegler UW Madison Associate Research Specialist (zegler@wisc.edu) Introducing a new Weed ID series of factsheets With everyone gearing up for the field season we thought it would be good to … Continue reading

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Cover Crops Becoming Your Next Weed?

Daniel H. Smith, Mimi Broeske, and Kevin Shelley- Nutrient and Pest Management Program University of Wisconsin-Madison Spring fieldwork has been a challenge so far and termination of cover crops can be a challenge under less than ideal conditions. A recent … Continue reading

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Preventing Cover Crops From Becoming Your Next Weed Problem Video

Daniel H. Smith- Nutrient and Pest Management Program University of Wisconsin-Madison Termination of cover crops can be a challenge. A new video from the Nutrient and Pest Management program details preventing cover crops from becoming problematic weeds. As farmers and … Continue reading

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Wild Parsnip, an expanding problem along roadsides in Wisconsin

Mark Renz Associate Professor and Extension Specialist. University of Wisconsin Madison Wild parsnip (Pastinaca sativa), a non-native plant, was first discovered in Wisconsin before 1900. Even those this plant has been present for over 100 years populations continue to spread … Continue reading

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2015 Soybeans Herbicide Evaluation Program Results Now Available

Mark Renz and Dave Stoltenberg Agronomy Department, University of Wisconsin-Madison; University of Wisconsin Extension Evaluation of new and existing herbicides for use in soybeans has annually occurred in Wisconsin for over 30 years. This program continues to compare effectiveness of … Continue reading

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