Split application of Caparol on Celery labeled

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

A new Caparol label allows a split application of Caparol (prometryn) on celery. The previous label allowed one application of 2 quarts (2 lb ai) of Caparol at two to six weeks after transplanting. The new label maintains a maximum of 2 lb/acre, but allows it to be applied in two applications.

Caparol is used both post-transplant and postemergence on celery. It normally is applied once at 2 lb ai per acre. When weeds are small, 1quart (1 lb) of Caparol gives sufficient control of most weeds. By splitting the application, growers can stay within the label limit of 2 lb per acre per season and maintain weed control for a longer period.

Caparol is an effective pre and postemergence herbicide. It controls many broadleaves and annual grasses. It may be possible to mix a quart (1 lb) of Caparol with a pound of Lorox 50 DF (0.5 lb ai) for post transplant application, and do the same treatment four weeks later. Dual Magnum applied immediately after transplanting will suppress germination of most weeds, including yellow nutsedge. Caparol can then be applied two to six weeks later to kill any emerged weeds and extend preemergence activity. Please see Extension Bulletin E-433, Weed Control Guide for Vegetable Crops, for more information on celery weed control.

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