ISK Flazasulfuron

Registered until
Registration number
Active materials

It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation.

Flazasulfuron is a selective herbicide for preemergence and postemergence control of certain broadleaf weeds and grasses in citrus, grape, sugarcane, tree nuts, conifer trees and for use in industrial vegetation management in specified nonagricultural areas. Flazasulfuron is absorbed through the root and foliage of plants, rapidly inhibiting the growth of susceptible weeds. For preemergence application, rainfall or irrigation is needed for herbicide activation. Length of control is a function of environmental factors such as soil type, soil moisture, temperature and amount of moisture after the application. Existing weeds or crop residue may reduce the length and level of residual control. Weed control may also be reduced due to environmental stress to the weeds at the time of the application.
Weed growth stops within hours after the application, however symptom progress from discoloration or chlorosis to necrosis generally requires from 2 to 4 weeks. Speed of control is generally a function of weather with faster action during warmer weather and actively growing weeds. The best control is
obtained when ISK Flazasulfuron Herbicide is applied either to weeds just prior to germination or to young, actively growing weeds.
For optimal herbicidal activity, prior to application, the bed or soil surface should be reasonably even and clear of crop and weed residue. Before herbicide application, crop and weed residue can be mixed into the soil through cultivation, or removed by blowing the area to be treated. Any practices that cause disturbance of the soil surface after herbicide treatment will decrease herbicidal activity. If rainfall does not occur within 2 weeks after a preemergence, application ¼ to ½ inch of irrigation water should be applied. Do not apply more than 1 inch of irrigation water.
ISK Flazasulfuron Herbicide controls weeds by inhibiting the acetolactate synthase (ALS) biochemical process. Some weeds may contain naturally occurring populations that are resistant to ALS inhibiting herbicides. Applications of ALS inhibiting herbicides, when used alone, over a period of time may lead to biotypes that are resistant to ALS herbicides. This then leads to a reduction in the level of control obtained through the use of these herbicides. To prevent or delay the build-up of ALS resistant weeds, weed management programs should include the use of appropriate registered herbicides for control of these weeds that have a different mode of action. Applications of herbicides with a different mode of action should be used during the same year or in sequential years.

x Do not apply ISK Flazasulfuron Herbicide aerially.
x Do not apply ISK Flazasulfuron Herbicide through any irrigation system.
x Do not apply to saturated soils.
x Do not apply to plants that are under stress due to drought, standing water, heavy insect and/or disease pressure, low soil fertility, etc.
x Do not mechanically incorporate into the soil.
x Do not apply more than 0.15 lb ai per acre per year.
x A 25 foot buffer for ground applications must be maintained between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (including grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrub lands), sensitive freshwater habitats (including lakes, rivers, sloughs, ponds, creeks, marshes, streams, reservoirs and wetlands) and estuarine/marine habitats.

Registered for culturesRate
Citrus2.14 - 2.85 oz
Grapes2.14 - 2.85 oz
Sugarcane0.9 - 2.85 oz