Sharpen registered for in-season use on rice


Rice producers will have a new broadleaf herbicide to use in controlling problem weeds while their crop is growing in 2014.

Sharpen, a product of the Kixor herbicide technology developed by BASF, has been registered for burndown use from fall to prior to planting in rice and other crops. In 2014, BASF expects registration for uses up to pre-emergence and as an early post application in rice.

"This will give farmers an opportunity for not only burndown control of broadleaf weeds but also some residual control of broadleaf weeds in rice,” says Alvin Rhodes, BASF technical services representative. “We feel this will benefit the farmer in many ways.”

Rhodes, interviewed following the New Products from Industry session at the annual USA Rice Outlook Conference in St. Louis, said Sharpen will be labeled at 1 to 2 ounces pre-emerge or possibly 1 ounce for postemergence applications. It will be the first time Sharpen has been labeled for in-season use in any crop.

Glyphosate-resistant marestail and Palmer amaranth have become major obstacles to good weed control in fields in the South that can be rotated between rice, soybeans and corn. Sharpen has been shown to work three to five times faster than glyphosate and 2, 4-D.

"This is the first registration for postemergence application of Sharpen on any crop,” he noted. “It will be on rice basically from the one-leaf stage up to four-leaf stage or pre-flood. We recommend it be used at the one-ounce rate for burndown of weeds and use crop oil and not methylated seed oil in that post emerge application.”

BASF will recommend that Sharpen be used pre-emerge to spike, but not from spike to the one-leaf stage. “Rice is a little more sensitive at that point, but after the one-leaf stage Sharpen can be applied up to pre-flood. You may get a little leaf-burn by using crop oil, but rice grows right out of it, and it does a great job of burndown weed control during that process.”

Growers can tank mix Sharpen with other products, including Newpath, Beyond and other products to get expanded weed control to supplement any broadleaf burndown activity.

For more on Sharpen, see

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