Arkansas Rice: Herbicide Max Use Rates and Cut-Off Timings

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    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 Stage

    Cut-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



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