After two seasons under Section 18 labeling, Shark herbicide has been approved for use in rice production in California under Section 3 labeling by the U.S. Environmental Protection Agency (EPA) and the California Department of Pesticide Regulation.

The label allows for the use of Shark in California rice production for postemergence control of sedge and broadleaf weeds.

Shark contains carfentrazone ethyl, a relatively new active ingredient from FMC Corp. that is applied at low use rates. When used in accordance with the label, Shark is an effective tool against resistant broadleaf weeds and sedge in rice.

“Shark is particularly strong against California arrowhead and ricefield bulrush,” says Mike Steffeck, North America marketing manager for FMC. “These problem weeds are not sufficiently controlled by other veteran herbicides.”

“Shark is also effective against other sedge and broadleaf weeds like purple ammannia, redstem ammannia and small-flower umbrellaplant,” adds Steffeck. “And, it is flexible for tank-mixing with most other registered products.”

Here are a couple of key guidelines outlined on the new Shark label:

Do not use Shark within a half-mile of sensitive crops (all broadleaf crops).

Shark must be applied using ground equipment with each operating nozzle producing droplet size not less than a volume mean diameter (VMD) of 500 microns. The best drift management strategy is to apply the largest droplets possible that still provide sufficient coverage and control. While larger droplets significantly reduce drift potential, it will not prevent it; particularly if applications are made improperly or under unfavorable environmental conditions.