Wisconsin Crop Manager newsletter

Author:	WCM Staff	Created:	4/21/2006 11:13 AM
Weed woes

New Corn and Soybean Herbicides for 2008

By WCM Staff on 3/27/2008 2:35 PM

This season brings several new corn and soybean herbicides to the market. While some of these herbicides are marketed specifically for use in herbicide-resistant crops, others can also be used to reduce the risk of early-season weed competition. All but one of these herbicides contain active ingredients that have been previously marketed.

Orion: Another New Wheat Herbicide

By WCM Staff on 3/27/2008 2:25 PM

In addition to the wheat herbicides reviewed in the last issue, Orion (Syngenta) has recently received its registration. Orion is a postemergence broadleaf herbicide for wheat, barley and oats and contains the ingredients florasulam and MCPA.

Using Herbicides for Mid-Contract Management of Fields Enrolled in the CRP

By WCM Staff on 3/13/2008 2:42 PM

New regulations require fields enrolled in the conservation reserve program (CRP) that are sod-bound with grasses be managed periodically to reduce this dominance and increase the diversity of desirable broadleaf plants.

Sweet Corn Tolerance to Accent, Callisto, Impact, and Laudis

By WCM Staff on 3/13/2008 2:25 PM

Postemergence herbicides are very useful for weed management in sweet corn, but caution may be needed when certain herbicides are applied to sensitive hybrids. Over the past 3 years, we have conducted many sweet corn tolerance trials to postemergence herbicides.

Winter Wheat Herbicide Comments

By WCM Staff on 3/13/2008 2:15 PM

Although the snow has yet to melt, it will soon and winter wheat should be off to a quick start. One nice advantage with winter wheat is weed management. Winter wheat is very competitive with weeds and many fields frequently do not need a herbicide application for weed control in Wisconsin.

Fall Alfalfa Removal Using Herbicides

By WCM Staff on 10/5/2007 7:19 AM

Alfalfa is a key crop in many rotations within Wisconsin, but if not successfully removed it can be troublesome in subsequent crops. This is especially true in no-till systems. This experiment was conducted on Roundup Ready alfalfa, as concern exists in the ability to remove this crop without the use of glyphosate as this is the most common herbicide used to remove alfalfa.

Fall management of thistles

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.

Collecting Lambsquarters Seed for Testing Plant Response to Glyphosate

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.

Fall Dandelion Management

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.

Herbicide Carryover and the Drought - Rotational Restrictions for Winter Wheat

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.

Volunteer wheat in summer seeding alfalfa

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.

A View from Down Under - Soybean Canopy

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.

WIN-PST Quick Guides, updated and expanded to more crops for 2007

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.

Amended Ruling on Roundup Ready Alfalfa

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.