Cimmaron: A New Ally For Pasture Weed Control
An old product with a new name takes the hassle out of treating your pastures
For many producers, it's a bother to have to keep livestock out of pastures a week or longer after treating them with herbicides to control weeds.
That’s not a problem with Cimarron and Cimarron Max, two products now available from your Southern States retailer. Neither of these materials has a waiting period between application and grazing of nonlactating livestock.
You may not recognize the brand names, but the chemicals have been around for a number of years, notes Kevin Headley, corporate marketing manager for crops, turf and forestry products at Southern States. Until a year ago, he explains, Cimarron was marketed in the pasture and rangeland market as Ally. Ally may still be available at some Southern States retailers.
"We offer Cimarron because it's very effective against broadleaf weeds in rangeland and pasture grasses, and because it's so safe to use," Headley says. "It's ideal for horse pastures."
These Cimarron products from Dupont are registered for use on pastureland, rangeland and CRP land for postemergence control of broadleaf weeds by absorbing through the foliage. The growing point of the target weed generally dies within one to three weeks. Cimarron Max, a combination of Cimarron, dicamba and 2,4-D, broadens the weed-control spectrum.
Cimarron can be applied on fescue, orchardgrass, timothy, bluegrass, bermudagrass, bromegrass and a number of rangeland grasses. It controls a wide spectrum of weeds.
"It's very effective against curly dock, a weed that's hard to kill and lowers the quality of hay," says Charles Hubbard, a regional agronomist for Southern States in Glen Allen, Va. "It also controls buttercup, thistles and many other weeds."
Kenny Lee, who manages Highland Orchards at Covesville, Va., has used Cimarron on both fescue and orchardgrass.
"Last year, I had thistles that were starting to overpower some orchardgrass that I had replanted.
I applied a tank mix of Cimarron and Banvel and got rid of them," he reports. He's also eliminated spiny amaranth (pigweed), as well as a mint weed in fescue that is potentially toxic to cattle.
"I like that there are no grazing restrictions," Lee adds. "It comes in a flowable granular form that's easy and safe to mix and store."
As manager of a 900-acre farm and 80-cow Angus herd, Lee buys a lot of inputs. Most of those come from Charlottesville, Va., where his local Southern States retailer is located. Matt Porter is the manager.
Hubbard cautions that Cimarron should not be applied to ryegrass pastures, alfalfa or clover. Some grasses, particularly fescue and timothy, are somewhat sensitive to Cimarron applications. Timothy should be treated in late summer or fall when plants are at least 6 inches tall. Fescue should be treated in the spring after new growth is 5 to 6 inches tall or in the fall.
Randy Prouty, Dupont district sales manager, points out that spraying weeds early in spring when grass is growing actively knocks out winter annuals. In addition, Cimarron provides residual control of summer annuals.
Lee gets most of his forage from 200 acres of pasture. In addition to grazing, he wants to get a cutting of hay off of each field. Since the herbicide can suppress fescue growth, he waits until after he harvests his first cutting of hay before spraying.
Don't apply Cimarron to stressed grasses. Injury can be minimized by tank-mixing Cimarron with 2,4-D, using a nonionic surfactant and applying the lowest recommended rate for target weeds.
Cimarron also may be tank-mixed with Dicamba, Grazon P+D, Tordon 22k, Weedmaster, Remedy or Amber.