A large portion of the rice in the state is now reaching or already at flood and moving into reproductive growth stages. As a result, it’s important to remember cut-off timings and season max use rates for herbicide applications.
Applications of herbicides above season use rates or occurring after cut-off dates can result in rice injury and yield loss. Table 1 provides this information as a quick reference for postemergence rice herbicides.
For additional information regarding max season use rates and cut-off timings of other herbicides or for other cropping systems, check out the MP566 Application Cut-Off Timings for Common Herbicides and MP567 Max Use Rates per Application and per Season for Common Herbicides. Good luck out there!
Table 1. Rice herbicide cut-off timings and season max use rates.
Herbicide |
Rice Growth StageCut-Off |
Season Max Use Rates |
|---|---|---|
| Aim | 60-day PHI; ½” IE recommended | 8.8 fl oz/ac |
| Basagran | No cut-off on label | 4 pt/ac |
| Beyond/Postscript | BIE/green ring | 10 fl oz/ac – Beyond
15 fl oz/ac – Postscript |
| Clincher | 60-day PHI; green ring recommended | 25 fl oz/ac |
| Facet | 40-day PHI; green ring recommended | 43 fl oz/ac |
| Gambit | 48-day PHI | 2 oz/ac |
| Grandstand | ½” IE; green ring recommended | 32 fl oz/ac |
| Grasp | 60-day PHI ½” IE recommended | 5.6 fl oz/ac |
| Londax | 60-day PHI ½” IE recommended | 1.67 oz/ac |
| Loyant | 60-day PHI; green ring recommended | 32 fl oz/ac |
| Newpath/Preface | 5-leaf rice | 12 fl oz/ac |
| Permit | 48-day PHI | 1.33 oz/ac |
| Permit Plus | 48-day PHI | 1.5 oz/ac |
| Phenoxy (2,4-D) | Green ring | 3.2 pt/ac |
| Propanil | 60-day PHI; green ring recommended | 8 qt/ac |
| Provisia/Highcard | Green ring | 31 fl oz/ac |
| Regiment | Green ring | 1.06 oz/ac |
| Ricestar HT | Green ring | 30 fl oz/ac |
| Rogue | 2-tiller rice | 12.6 fl oz/ac |
| Sharpen | ½” IE | 6 fl oz/ac |
| Ultra Blazer | 50-day PHI | 1 pt/ac |
