Sethoxydim Equivalent to Vantage Grass Killer Selective Herbicide for Annual and Perennial Grasses

Sethoxydim is a very selective, post-emergence which is used in noncrop areas for the control of grass. A brief example of use areas is in wildflower plantings on roadsides which mark the desiring grass to be killed in favor of wildflowers which are not susceptible to vantage. The herbicide contains 13& sethoxydim used mainly on the turfs most ornamentals, nonfood areas, and noncrop sites. The rate of the herbicide ranges from 0.5 - 1.4 ozs. Per 1,000 sq. ft. or spot treat at 2 - 3 ozs. The herbicide is ranges from per gallon of water.

Sethoxydim kills grasses by preventing the synthesis of lipids, but it has little or no impact on broadleaf herbs or woody plants. Sethoxydim is readily degraded through microbial metabolism and photolysis, and possibly by hydrolysis. Numerous degradation products have been identified, some of which are also toxic to plants. The average half-life of sethoxydim in soils is four to five days, but half-lives can range from a few hours to 25 days. Because sethoxydim is water-soluble and does not bind strongly with soils, it can be highly mobile. No reports, however, were found referring to water contamination or off-site movement by sethoxydim. Sethoxydim is of relatively low toxicity to birds, mammals, and aquatic animals, and has little noticable impact on soil microbe populations. An oil adjuvant or non-ionic surfactant should be used to facilitate absorption of sethoxydim by plants.