New herbicide registrations and labels for 2009

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.      

Some new herbicide registrations for vegetable crops have been issued since the 2009 Vegetable Weed Control Guide (E-433) was printed. Several labels are also pending and may be issued in time for use this growing season.

Spartan 4F

EPA has approved a Section 18 emergency label for use of Spartan 4F on strawberry. This label is similar to Section 18s issued during the past several years. Spartan may be applied to strawberries at renovation after mowing, or to dormant strawberries in late fall. One or two applications of 4 to 8 fl oz are allowed, with a maximum of 12 fl oz. product per acre per year. The label is effective June 25 through July 25, and October 15 through December 15, 2009. Care must be taken to avoid drift to non-target native plants. The label may be down loaded from the site: There. is a good chance that a federal Section 3 label for this use will be issued during 2009.

Prowl H2O

The Prowl H2O label for strawberry has been expanded to include application to perennial strawberries at renovation or in late fall during dormancy. It may be applied to new plantings either before or after transplanting. A second application may be made as a spray directed to the row middles. Normal application rate is 1.5-3 pints per acre. There is a 35-day preharvest interval. Prowl H2O gives good control of annual grasses, but is weak on composites (common ragweed, mayweed, common groundsel, etc) and mustards, all of which often are problems in strawberries. Prowl H2O probably will be most useful in combination with Sinbar or Ultra Blazer.

EPA has issued tolerances for several additional uses, and we are waiting for issuance of labels. These include Chateau on celery, Stinger on Swiss chard and blueberry, and Goaltender for postemergence use in cole crops (broccoli, cabbage, and cauliflower).

New labels will be announced in the Vegetable CAT Alert and posted on the above website as soon as the labels are issued.

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