Mesotrione carryover to soybeans

Mesotrione provides excellent residual control and breaks down readily in the soil provided there is sufficient moisture. Another important consideration is the rate of application, the timing of application, and soil characteristics likely influences the rate of degradation. Another possible consideration is the interaction of the atrazine included in Lumax with the mesotrione. Typically the mesotrione rate for a soil application of Callisto is approximately twice the rate when applied postemergence and is 0.24 and 0.1 lbs active ingredient/acre. The maximum rate of mesotrione in Lumax is 0.2 lbs active ingredient/acre

Acetic acid (vinegar) for weed control revisited

An article in the June 3, 2002, Integrated Crop Management newsletter, page 91, described the use of acetic acid (vinegar) as a tool for controlling weeds. This article prompted a number of questions from growers and agribusiness personnel in Iowa. As a result of these questions, I contacted the USDA researchers that conducted the work and also checked a number of sites on the Web for information. The information below is from discussions with the researchers Dr. John Teasdale and Dr. Jay Radhakrishnan, and publicist Don Comis, and it is reported at several Web sites, including The Vinegar as an Herbicide Information Page andSpray Weeds with Vinegar

Weed Science Field Day 2002

The Weed Science Field Day will be held on June 27, 2002, at the Iowa State University Curtiss Farm on South State Street in Ames. The field day will begin with registration from 8:00 a.m. until 9:00 a.m. followed by a short program. Research and demonstrations of weed management techniques, herbicides, application strategies, and various crop traits will be available for review. Most of the ag chemical companies will be represented and available for discussions about their products. Farmers, ag chemical professionals, and the public are invited. Registration is $20, and refreshments and lunch will be provided. If you have questions, please contact me at (515) 294-1923 or e-mail [email protected]