Rimsulfuron (Matrix SG)
WSSA Group 2: acetolactate synthase (ALS) inhibitor
Matrix has both pre-emergence and very early post-emergence activity. When weeds are pres-ent at application, include a labeled burndown herbicide.Can be applied broadcast to vineyard floor or banded at the base of the vines. Best pre-emer-gence results are obtained when the soil is debris-free and moist at time of application, and the site receives 0.5 inches of rain or irrigation moisture within 2 weeks of application. Crops must be established for 1 year before application (vines should be healthy and growing vigorously). Sus-ceptible weeds are controlled from 60 to 90 days after application. Two applications separated by 30 days are allowed if applied in bands that cover half of the vineyard. Do not exceed 4 ounces of formulated product per acre on a broadcast basis per year. For best results, maintain spray tank solution at pH 5 to 7. The pre-harvest interval is 14 days.
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 rimsulfuron on Grapes
Pre-Emergence (Weeds)
| Target | Rate of application | REI | PHI | MOA | Eff. | Notes |
|---|---|---|---|---|---|---|
| Annual Broadleaf Weeds | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). | |
| Annual Grasses | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). | |
| Biennial and Perennial Broadleaf Weeds | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). |
Post-Emergence (Weeds)
| Target | Rate of application | REI | PHI | MOA | Eff. | Notes |
|---|---|---|---|---|---|---|
| Annual Broadleaf Weeds | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). | |
| Annual Grasses | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). | |
| Biennial and Perennial Broadleaf Weeds | 4.0 oz | 4 | 14 | 2 | Crops must be established for 1 year before application (vines should be healthy and growing vigorously). |