By WCM Staff on 4/25/2007 2:42 PM

WCM PDF version of April 26 issue for download and printing

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By WCM Staff on 4/25/2007 2:10 PM

Due to a trend of warmer winters in the state, Stewart’s Disease, also known as Stewart’s Wilt, should now be on the radar for Wisconsin sweet corn and seed corn producers. Warmer winters increase the overwintering survival rate of corn flea beetle, the primary vector of the bacterium that causes the disease.

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By WCM Staff on 4/25/2007 12:14 PM

Horseweed (or marestail) is the most widely distributed glyphosate-resistant weed in the U.S. After the initial confirmation in Delaware in 2001, glyphosate-resistant (GR) horseweed has been reported 15 states, including Illinois to our south and Nebraska to our southwest. The potential for horseweed seed to move from one farm to another or even from one county to another is an interesting question.

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By WCM Staff on 4/24/2007 10:51 AM

The weather conditions this spring have kept corn growers out of the field until this past week. A few growers are concerned about germination and seedling injury because they will be applying preplant anhydrous ammonia (NH3) only a few hours before planting. The questions are: what should they do to prevent or minimize injury; and what should they expect the crop to look like?

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By WCM Staff on 4/19/2007 3:11 PM

WCM PDF version of April 19 issue for download and printing

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By WCM Staff on 4/19/2007 2:37 PM

This article stems from our discussion about this proposed practice to “double-up” on rootworm control tactics for the 2007 season. We (UW Madison Entomology and UW-Extension) do not recommend this practice, nor does it fit into a sound integrated pest management (IPM) approach to agronomic field crop production.

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By WCM Staff on 4/19/2007 1:04 PM

Whether glyphosate is being applied in burndown applications at this time of the season or in the middle of summer, applications need to be managed to avoid drift to sensitive crops or adjacent properties.

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By WCM Staff on 4/19/2007 12:58 PM

Winter wheat might be smaller than normal at this time of the year, which means the wheat might be more susceptible to weed competition. The two herbicides that generally have the greatest risk of injuring winter wheat are 2,4-D and dicamba...

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By WCM Staff on 4/19/2007 11:40 AM

This tool used data collected from the weed garden at Arlington to develop easy to read graphs that show the range of first emergence, the typical first emergence, and range of flowering times of 69 common weed species found in Wisconsin.

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By WCM Staff on 4/12/2007 11:14:00 AM

WCM PDF version of April 12 issue for download and printing

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By WCM Staff on 4/11/2007 11:58 AM

Label updates on the herbicides Breakfree, Caonopy EX, and Express

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By WCM Staff on 4/11/2007 11:49 AM

In impromptu no-till fields, growers are unprepared for effective weed management. Effective weed management in no-till includes 1) managing winter annuals (mustards, horseweed, prickly lettuce, etc.) and perennials like dandelions before planting; 2) burning down early emerging summer annuals like giant ragweed, foxtails, and lambsquarters; and 3) managing early season weed competition.

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By WCM Staff on 4/5/2007 8:53:00 AM

WCM PDF version of April 5 issue for download and printing

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By WCM Staff on 4/4/2007 1:51 PM

The Poast label from MicroFlo and the Poast Plus label from BASF are the two labels that include use directions for sethoxydim-resistant sweet corn hybrids. The addition of sethoxydim-resistant sweet corn is new on the BASF Poast Plus label for this year.

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