Wisconsin Crop Manager newsletter

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

Generic Herbicide List?

By WCM Staff on 3/8/2007 9:53 AM

I was recently asked if I had a list of generic or post-patent corn and soybean herbicides. Although I don’t have a list, I would recommend the Department of Agriculture, Trade, and Consumer Protection web site of “Pesticide Database Searches” at http://www.kellysolutions.com/wi/.

Valor XLT Labeled on Soybean

By WCM Staff on 3/8/2007 9:49 AM

Valor XLT is a premix of Valor (30% flumioxazin) and Classic (10.3% chlorimuron) by Valent which is labeled for broadleaf weed control and suppression of annual grasses. The main label does not include mention of use in Wisconsin, but a supplement label is available from Valent (not on CDMS) that allows use of the lowest labeled rate of 2.5 oz/a in southern Wisconsin. Applications can only be made south of I-90 between LaCrosse and Madison and south of I-94 between Madison and Milwaukee.

Weed Management in Continuous Corn

By WCM Staff on 3/8/2007 9:43 AM

While continuous corn may affect insect and disease management, I believe the effect on weed management will be relatively minor. Because corn is not a “host” of weeds like corn is a host of disease or insects, corn will not cause specific weed species to increase just because it is planted. Rather, weeds may increase because other practices used in corn production allow weed shifts or increased weed populations.

Roundup Ready Alfalfa Calculator

By WCM Staff on 2/15/2007 11:12 AM

To help producers understand the potential costs and benefits of this new technology Dan Undersander has created a calculator that can help you estimate the differences in costs between RR alfalfa and standard alfalfa varieties. It is currently available at the following URL: http://www.uwex.edu/ces/forage/pubs/economics_RR_alfalfa.xls

Corn and Soybean Herbicide Updates, Jan 2007

By WCM Staff on 1/18/2007 12:58 PM

Pesticide updates for corn and soybean. Corn - Autumn (Bayer) and Status (BASF). Soybean - Canopy (DuPont) , Authority First DF (FMC), and Sonic (Dow), and Prefix CP (Syngenta)

Glyphosate Resistance News, Jan 2007

By WCM Staff on 1/18/2007 12:36 PM

Extension weed scientists at Ohio State University and Purdue University have recently reported confirmed cases of glyphosate-resistant giant ragweed in Ohio and Indiana. This will certainly be important to the growers who have this problem, especially in years when they are growing soybeans in these fields. This should be a warning notice to Wisconsin soybean growers as the complaints about giant ragweed continue to increase in Wisconsin.

Weed Tools on the Web

By WCM Staff on 1/18/2007 11:00 AM

by Chris Boerboom, Ext. Weed Scientist "Two handy weed management tools are available on the web ..."

Horseweed, Resistance, and Wind.

By WCM Staff on 1/1/2007 3:43 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

North Central Weed Science Society Meeting

By WCM Staff on 11/16/2006 5:22 PM

The annual meeting of the North Central Weed Science Society will be held at the Hyatt Regency in Milwaukee this December 12-14.

Pest Management Update Meeting Packets Available

By WCM Staff on 11/16/2006 4:54 PM

We are just finishing the 2006 Pest Management Update meetings this week. Over the past week, I have seen more corn in the fields than during any other fall when we’ve held these meetings (at least since I’ve been here). If the late harvest or other field operations kept you from attending one of these meetings, packets of the materials can be ordered.

Late fall herbicide applications on herbaceous perennial weeds

By WCM Staff on 10/12/2006 4:24 PM

While fall applications have many positive aspects, several questions often arise with fall applications: 1. How late into the season can I apply? 2. Does the temperature during application matter? 3. How safe is the fall application to desirable plants?

Get Ready for Dandelions This Fall (in the fields)

By WCM Staff on 9/7/2006 6:51 PM

Fall is generally a better time to target dandelions than in the spring. It’s hard to get good consistent control of dandelions in the spring, whether with 2,4-D or glyphosate or other herbicides. The cool temperatures and dandelion’s early growth stage combine to keep these herbicides from providing high levels of dandelion control.

Waterhemp “Officially” Glyphosate Resistant

By WCM Staff on 8/10/2006 3:35 PM

Dr. Kevin Bradley and Travis Legleiter, University of Missouri, have officially declared a population of common waterhemp in northwest Missouri as glyphosate resistant.

FTD Biggest Weed Contest

By WCM Staff on 7/20/2006 6:06 PM

The Biggest Weed Contest had several interesting, tall, and large weeds entered last week at the Weed Doctor Booth at Farm Technology Days. Entries included weeds like sweet clover, poison hemlock, and giant ragweed.