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Publication #HS951

Weed Management in Beet1

Peter Dittmar and William Stall2

Beets can be found as red beets, table beets, or garden beets. Both the tops (greens) and the bottoms (swollen hypocotyl) may be eaten. Always check the label on beet greens because residue establishment varies. Table 1 lists herbicides that can be applied before crop emergence. Table 2 lists herbicides that can be applied after crop emergence.

Tables

Table 1. 

Preemergence chemical weed control in beet

Active ingredient

lb. a.i./A

(Trade name)

amount of product/A

Weeds controlled / remarks

Carfentrazone

Up to 0.031

(Aim®) 2 EC or 1.9 EW

Up to 2 fl. oz.

Emerged broadleaf weeds. Apply as a preplant burndown for emerged broadleaf weeds. Use crop oil concentrate or nonionic surfactant at recommended rates. May be tank mixed with other herbicides.

Glyphosate

(Various formulations)

Consult label

Emerged broadleaf and grass weeds. Apply as a preplant burndown. Consult label for individual product directions.

Pelargonic acid

(Scythe®) 4.2 EC

3%–10% v/v

Emerged broadleaf and grass weeds. Apply as a preplant burndown treatment. Scythe® is a contact and nonresidual herbicide and can be tank mixed with residual preemergence herbicides to lengthen control.

Pyraflufen

0.001–0.003

(ET® Herbicide) 0.208 EC

0.5–2.0 fl. oz.

Emerged broadleaf weeds. Apply as a preplant burndown treatment.

Table 2. 

Postemergence chemical weed control in beet

Active ingredient

lb. a.i./A

(Trade name)

amount of product/A

Weeds controlled / remarks

Carfentrazone

Up to 0.31

(Aim®) 2 EC or 1.9 EW

Up to 2 oz.

Emerged broadleaf weeds. Apply as hooded application to row middles only. Use crop oil concentrate (COC) or nonionic surfactant (NIS) at recommended rates. May be tank mixed with other herbicides. Do not exceed 6.1 fl. oz. per cropping season. PHI 0 days.

Clethodim

0.09–0.13

0.07–0.13

(Select®, Arrow®) 2 EC

6–8 fl. oz.

(Select Max®) 1 EC

9–16 fl. oz.

Perennial and annual grass weeds. In fields with heavy grass pressure or larger grass weeds, use higher rates or repeat applications 14 days apart. Use a COC at 1% v/v in the finished spray volume. NIS with Select Max®. PHI 30 days.

Pelargonic Acid

(Scythe®) 4.2 EC

3%–10% v/v

Emerged broadleaf and grass weeds. Direct spray to row middles. Product is a contact, nonselective, foliar-applied herbicide with no residual control. May be tank mixed with several soil residual compounds.

Sethoxydim

0.28–0.47

(Poast®) 1.5 EC

1.5–2.5 pt.

Emerged grass weeds. A maximum of 5 pt./A applied in one season. Include a COC. Unsatisfactory results may occur if applied to grasses under stress. PHI 60 days.

Footnotes

1.

This document is HS951, one of a series of the Horticultural Sciences Department, UF/IFAS Extension. Original publication date August 2003. Revised April 2013 and October 2013. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Peter Dittmar, assistant professor, and William Stall, emeritus professor, Horticultural Sciences Department, UF/IFAS Extension, Gainesville, FL 32611.

The use of trade names in this publication is solely for the purpose of providing specific information. It is not a guarantee or warranty of the product named, and does not signify that they are approved to the exclusion of others of suitable composition.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.