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.
Rice Growth Stage
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|