Pronamide (Kerb SC)
WSSA Group 3: microtubule assembly inhibitor
Pronamide is a soil-applied product that is used for the control of grasses (annuals and some perennials) and some broadleaved species primarily for pre-emergence although Kerb can control some small weeds that have emerged. Apply only once in the fall prior to soil freezing as a directed application when the soil temperature is below 55°F, but not when soil is frozen. Kerb is most effective when applied prior to weed emergence, to soil that is relatively free of residue, and when the application is followed by rainfall or irrigation. Use rate will be determined by the weed species to be controlled and soil type although the maximum use rate per acre per year is 4 lbs of active ingredient. Do not use on vines less than 1 year old, on fall-transplanted stock that has been transplanted less than 1 year, or to spring-trans-planted stock that has been transplanted less than 6 months.
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 pronamide on Grapes
Post-Plant
| Target | Rate of application | REI | PHI | MOA | Eff. | Notes |
|---|---|---|---|---|---|---|
| Annual Grasses | 2.5-9.5 pt | 24 | - | 3 | Do not use on vines less than 1 year old, on fall-transplanted stock that has been transplanted less than 1 year, or to spring-transplanted stock that has been transplanted less than 6 months. Do not allow livestock to graze in treated areas. Rates are dependent on soil texture - check the label. Soil surface must be clean of debris prior to application. Fall applications, post-harvest but prior to soil freezing, is recommended. |
Pre-Emergence (Weeds)
| Target | Rate of application | REI | PHI | MOA | Eff. | Notes |
|---|---|---|---|---|---|---|
| Annual Broadleaf Weeds | 2.5-9.5 pt | 24 | - | 3 | Do not use on vines less than 1 year old, on fall-transplanted stock that has been transplanted less than 1 year, or to spring-transplanted stock that has been transplanted less than 6 months. Do not allow livestock to graze in treated areas. Rates are dependent on soil texture - check the label. Soil surface must be clean of debris prior to application. Fall applications, post-harvest but prior to soil freezing, is recommended. | |
| Annual Grasses | 2.5-9.5 pt | 24 | - | 3 | Do not use on vines less than 1 year old, on fall-transplanted stock that has been transplanted less than 1 year, or to spring-transplanted stock that has been transplanted less than 6 months. Do not allow livestock to graze in treated areas. Rates are dependent on soil texture - check the label. Soil surface must be clean of debris prior to application. Fall applications, post-harvest but prior to soil freezing, is recommended. | |
| Biennial and Perennial Broadleaf Weeds | 2.5-9.5 pt | 24 | - | 3 | Do not use on vines less than 1 year old, on fall-transplanted stock that has been transplanted less than 1 year, or to spring-transplanted stock that has been transplanted less than 6 months. Do not allow livestock to graze in treated areas. Rates are dependent on soil texture - check the label. Soil surface must be clean of debris prior to application. Fall applications, post-harvest but prior to soil freezing, is recommended. |