flazasulfuron (Mission)

Flazasulfuron (Mission)
WSSA Group 2: acetolactate synthase (ALS) inhibitor

Mission is labeled for the control of certain broadleaf and grass weeds including annual ryegrass, common mallow, clover and willowherb. Mission has both pre- and early post-emergence activity; weeds should be <4 inches tall and grasses should not be tillering in order to maximize post-emergence control potential. If weed emergence is substantial at the time of application, consider mixing flazasulfuron with an approved post-emergence herbicide to improve control.
Apply pre-emergence as a directed spray to the soil under vines that have been established for at least 3 years; protective sleeves (nonporous wraps, grow tubes, waxed containers) are required for third year vines. Do not apply where grapevine roots are exposed or to gravelly soils. Must be activated with rainfall or irrigation of 0.25 to 0.5 inch for pre-emergence control; pre-emergence efficacy will be maximized if the product is applied to bare soil. Do not apply more than two applications of 2.85 oz of formulated product per acre per year (maximum of 0.089 lbs of active ingredient or 5.7 oz of Mission per acre per year). The minimum allowed interval between treatments is 3 months. Do not apply within 75 days of harvest. A 25-foot buffer must be maintained between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (forested areas, riparian areas), freshwater habitats (lakes, rivers, sloughs), and estuarine/marine habitats.

At least one weed species resistant to this mode of action documented to occur in ID, OR, or WA; data from Heap, I.
The International Survey of Herbicide Resistant Weeds. Available at www.weedscience.org

Usage for flazasulfuron on Grapes

Pre-Emergence (Weeds)

Post-Emergence (Weeds)