By WCM Staff on 9/20/2007 1:17 PM

With fall just around the corner it’s a great time to consider treating biennial and perennial thistles. Research has shown the fall timing to be an effective time to treat these as long as foliage isn’t damaged by frost.

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By WCM Staff on 9/19/2007 12:56 PM

We’re interested in continuing our testing of common lambsquarters populations that have escaped control with glyphosate. If there is no readily apparent reason for the lambsquarters to escape control, these lambsquarters may have a low level of resistance to glyphosate. We want to test seedlings from these plants this winter in our continuing effort to better understand potential changes in lambsquarters sensitivity to glyphosate.

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By WCM Staff on 9/6/2007 5:00 PM

Dandelions don’t seem like they should be one of the more problematic weeds in field crops, but they certainly are in Wisconsin. With an abundant seed supply, wind dispersal, and limited dormancy, dandelions can start an infestation in spring, summer or fall.

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By WCM Staff on 8/29/2007 1:12 PM

Although some areas of the state have received normal or above normal rainfall throughout the growing season, many areas have experienced brief or prolonged drought conditions.

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By WCM Staff on 7/26/2007 11:23 AM

As wheat is currently being harvested, I have received several inquiries with regard to volunteer wheat management in summer seedings of alfalfa.

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By WCM Staff on 7/18/2007 2:07 PM

Recent discussions of weed management in soybeans are often centered around glyphosate, rates, weed heights, and application timing. If the initial glyphosate application controls all of the emerged weeds, it would be ideal if the soybean canopy was developed sufficiently to shade out weeds that emerge later. Thus, we should consider the light conditions that a young weed seedling experiences.

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By WCM Staff on 7/6/2007 10:41 AM

NPM recently completed the development of 2007 reference guides for use with the NRCS 595 Pest Management Standard. They cover apples, cherries and cranberries. corn, soybean, alfalfa and potatoes.

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By WCM Staff on 7/6/2007 10:34 AM

The judge has amended several regulations from his final ruling on May 3rd 2007. While the amendments do not change the restrictions on planting Roundup Ready alfalfa, they clarify some restrictions to the harvesting of Roundup Ready alfalfa already planted before the injunction and cleaning of equipment.

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By WCM Staff on 7/6/2007 10:28 AM

We have an opportunity to prevent the establishment of a new herbaceous perennial weed, perennial pepperweed (Lepidium latifolium L.). A small population of this plant was recently discovered along a roadside in Green Bay.

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By WCM Staff on 6/14/2007 10:19 AM

Although a little late for winter annuals and perennials, the Wisconsin Weed Garden is now officially open for business.

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By WCM Staff on 6/13/2007 12:19 PM

Although it is hard to say report anything good about a troublesome weed like waterhemp, Illinois weed scientists recently reported good news on how rapidly waterhemp dissipates from the seedbank.

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By WCM Staff on 6/13/2007 12:07 PM

Over the past several days, I’ve noticed several corn fields that are over-due for postemergence weed control.

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By WCM Staff on 6/7/2007 1:11 PM

Jerry taught this six-week course 30 times to students in the UW College of Agricultural and Life Sciences Farm and Industry Short Course Program. His presentations have been specially recorded for this DVD in Flash Player format.

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By WCM Staff on 6/7/2007 1:09 PM

In Wisconsin, weed resistance to glyphosate has not been confirmed, but there have been many reports of variable or inconsistent responses of common lambsquarters to glyphosate in Roundup Ready soybean fields.

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