Changes in the label and application recommendations of Valor seemed to have solved most of the problems growers had last year with the herbicide during its inaugural season, says Valent Southern Row Crop Manager John McClendon.
For the 2002 peanut season, Valent changed the formulation from a water dispersible granular to a wettable powder in a water-soluble bag. Valent also changed the label to require the pre-emergence application to be no more than two days after planting. Last season, some growers in the Southeast experienced injury with the peanut herbicide
“Because we got the label late in the spring of 2001, we didn't have the opportunity to fully educate the growers about the importance of the application being no more than three days after planting,” McClendon says. “Taking that into consideration, we changed the application timing on the label this year to no more than two days after planting and have worked hard to educate growers to minimize problems with the use of Valor on peanuts. Growers have reported good success with Valor on Florida beggarweed this season and have had little to no injury using the product in 2002.”
Also, the wettable-soluble package is pre-measured, making it easier to use, McClendon says.
“The fact that the granular formulation needed to be pre-mixed before adding to the tank may have contributed to some of the peanut injury experienced after use of Valor in 2001,” McClendon says. “Some of the material wasn't fully dissolved.”
With either formulation, Valent is also recommending that farmers clean out their spray system, not just the tank following every application of Valor, according to the label.
In Georgia, Alabama and Florida, Valor is recommended at 3 ounces per acre. In the Virginia-Carolina area, it's recommended at a 2-ounce rate. “If you've got Florida beggarweed, stay with the high rate,” McClendon says.
Valor has proven itself to be the most consistent peanut herbicide on Florida beggarweed. It also controls other weeds such as tropic croton, Florida pusley, common ragweed, common lambsquarter, pigweeds, black nightshade, prickly sida, eclipta, smallflower morningglory, and wild poinsettia.
It can also be used as part of a pre-plant burndown program in most crops in the Southeast.
Valor has a non-ALS mode of action, offering a resistance management tool. The herbicide provides up to six weeks residual control. It has no carryover concerns when planting barley, corn, cotton, dry beans, rice, rye, sorghum, sugarcane, tobacco or wheat the following season, McClendon says.