Dow AgroSciences has just made the scene with Sendero for mesquite control.
Sendero is the first new mesquite herbicide to reach the market since the company released Reclaim herbicide in 1987.
For 25 years, Reclaim herbicide tank-mixed with Remedy herbicide (later Remedy Ultra herbicide) has been the predominant mesquite treatment used on millions of acres. Company officials now expect Sendero to replace that tank mix as the treatment of choice. Like the original standard, Sendero is labeled for aerial, ground broadcast and foliar individual plant treatments.
"There's no question that Sendero is now the best mesquite treatment available," says Dave Owens, Range and Pasture portfolio marketing leader for Dow AgroSciences. "In trials, it has delivered both better and more consistent control than the previous standard."
In a series of aerial trials, Sendero herbicide averaged more than 10 percentage points better control than the tank mix of Reclaim and Remedy Ultra used in the same trials. The trials were funded by Dow AgroSciences and conducted by range specialists within Texas AgriLife Extension Service.
In those aerial trials, Sendero averaged 76% root-kill two years after treatment compared to 64% for the Reclaim/Remedy Ultra tank mix.
Perhaps more important, company officials note, mesquite control with Sendero was about 40% more consistent than that from the old standard tank mix of Reclaim plus Remedy Ultra.
In addition to mesquite, Sendero controls many species of broadleaf weeds and provides soil residual activity to control many later-emerging broadleaf species for weeks after treatment. Beyond the first season, there is no long-term forb shock from the herbicide. That means both livestock and wildlife can benefit from the lasting effects of mesquite control with Sendero.
Sendero herbicide does not harm desirable grasses, so native grass recovery can be as fast as environmental conditions allow.
Sendero combines two molecules discovered and developed by Dow AgroSciences for use on rangeland and pastures: aminopyralid and clopyralid. Aminopyralid is one of the ingredients in both GrazonNext HL herbicide and Chaparral herbicide. Both products have proven effective in weed control and brush suppression. Clopyralid is the single active ingredient in Reclaim herbicide.
Mesquite control offers several benefits. It allows cattle more access to grazing land, and ranchers more access to their cattle. Reducing dense stands of mesquite improves rangeland health and may increase groundwater recharge. When grasses replace brush on rangeland, sediment may be reduced in runoff. Applied in patterns, Sendero can create more edge habitat for wildlife.
Left untouched, mesquite cover tends to increase. Range scientists with Texas AgriLife Research documented that herbaceous production on clay loam soils declined severely once mesquite achieved more than 25% canopy cover. Following a high level of control from mesquite treatment, enhanced grass production can last at least 20 years, the researchers report.
Success with Sendero still depends on proper application, Dow AgroSciences experts emphasize. Those include timing with carbohydrate movement in the mesquite plant, leaf condition, soil temperature and growing conditions.
"Without the proper conditions for mesquite and weather, even the best herbicide treatment will provide less than satisfactory control," says Dow AgroSciences field scientist Chad Cummings.
For more information on new Sendero herbicide, contact Dow AgroSciences Customer Information at 1-800-263-1196.