Skip to main content Accessibility help

Cycloate and Phenmedipham as Complementary Treatments in Sugarbeets

  • J. H. Dawson (a1)


Cycloate (S-ethyl N-ethylthiocyclohexanecarbamate), applied by subsurface injection at 3.4 kg/ha, controlled 98 to 100% of barnyardgrass [Echinochloa crus-galli (L.) Beauv.] and 82 to 94% of common lambsquarters (Chenopodium album L.) and hairy nightshade (Solarium sarachoides Sendt.). Phenmedipham (methyl m-hydroxycarbanilate m-methylcarbanilate) at 1.1 kg/ha, applied after sugarbeets had emerged but before common lambsquarters had more than three pairs of true leaves or hairy nightshade had more than three or four true leaves, controlled the members of these species that had survived cycloate. Cycloate preconditioned sugarbeets and the surviving broadleaf weeds to injury be phenmedipham. Although applying phenmedipham following cycloate before sugarbeets had two pairs of true leaves sometimes resulted in severe crop injury, and applying it when weeds were too large resulted in incomplete weed control, in all experiments there was a period of at least 2 weeks during which application of phenmedipham killed the surviving lambsquarters and nightshade without injuring sugarbeets.



Hide All
1. Arndt, F. and Kötter, C. 1968. Zur Selektivität von Phenmedipham als Nachauflaufherbizid in Beta-Rüben. Weed Res. 8:259271.
2. Davis, D.G. and Dusbabek, K.E. 1973. Effect of diallate on foliar uptake and translocation of herbicides in pea. Weed Sci. 21:1618.
3. Dawson, J.H. 1973. Components of full-season weed control in sugarbeets. Washington Agr. Exp. Sta. Bull. 780. 11 pp.
4. Dawson, J.H. 1971. Weed control in sugarbeets with cycloate. U.S. Dep. Agr. Tech. Bull. No. 1436. 24 pp.
5. Gentner, W.A. 1966. The influence of EPTC on external foliage wax deposition. Weeds 14:2731.
6. Olson, P.D. and Appleby, A.P. 1970. Factors influencing the selectivity of herbicide combinations in sugarbeets. Proc. Second Intern. Meeting on Selective Weed Contr. in Beetcrops 1:201208.
7. Schweizer, E.E. 1974. Weed control in sugarbeets with cycloate, phenmedipham and EP-475. Weed Res. 14:3943.
8. Schweizer, E.E. and Weatherspoon, D.M. 1971. Response of sugarbeets and weeds to phenmedipham and two analogues. Weed Sci. 19:635639.
9. Steele, R.G.D. and Torrie, J.H. 1960. Principles and procedures of statistics. McGraw-Hill Book Co., Inc. New York, N.Y. 481 pp. 10. Still, G.G., Davis, D.G., and Zander, G.L. 1970. Plant epicuticular lipids: alteration by herbicidal carbamates. Plant Physiol. 46:307–314.

Cycloate and Phenmedipham as Complementary Treatments in Sugarbeets

  • J. H. Dawson (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.