The Environmental Protection Agency recently registered two label changes for Rimfire herbicide from Bayer CropScience.

Rimfire is a post-emergence herbicide for wheat and durum-controlling wild oats and a host of broadleaf weeds. The label change allows Bayer CropScience to expand Rimfire's weed spectrum claim to better reflect the true performance of the product in the field. Cheat, barnyardgrass, foxtail barley, green foxtail, Japanese brome and yellow foxtail are now shown as weeds that Rimfire controls.

The modified label also offers a reduced crop rotation interval when following wheat with sugarbeets. The crop rotation interval requirement is now reduced to 10 months versus a previous interval of 12-months.

Clair Heinbuch, Bayer CropScience cereal herbicide product manager, says the updated label reflects the true scope of Rimfire's weed spectrum following extensive field experience. "It also gives cereal growers the freedom to follow wheat with sugarbeets as part of their crop rotation strategy," he says.

Rimfire can be tankmixed with a number of broadleaf herbicides without compromising control of wild oats, green and yellow foxtails as well as foxtail barley, cheat and Japanese brome. According to Heinbuch, the later three have become increasingly important for control strategies in reduced tillage areas. Bayer CropScience recommends growers apply Rimfire postemergence at a 1.75 to 2.25 ounce per acre rate with a spray adjuvant when grass weeds are in the one-leaf to two-tiller stage and before broadleaf weeds are larger than two inches in height.

Rimfire also has excellent rotational flexibility and should not interfere with most re-cropping strategies. It can also be tankmixed with a variety of foliar fungicide products.