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Managing Volunteer Potato (Solanum tuberosum) in Field Corn (Zea mays) with Carfentrazone-Ethyl and Dicamba

Published online by Cambridge University Press:  20 January 2017

Rick A. Boydston
Rick A. Boydston*
Affiliation:
USDA-ARS Irrigated Agriculture Research and Extension Center, Prosser, WA 99350-9687
*
Corresponding author's E-mail: [email protected]
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Abstract

Volunteer potato is a perennial weed that is difficult to control in crop rotations. Field studies were conducted near Paterson, WA, in 2001 and 2002 to evaluate the control of volunteer potato with carfentrazone-ethyl and dicamba in field corn. When potatoes were not controlled corn yield was reduced 23 and 62% in 2001 and 2002, respectively. Single postemergence (POST) applications of carfentrazone-ethyl at 9 g/ha killed exposed foliage of potato, but new shoots continued to emerge both years and reduced corn yield in 2002. The most effective treatments tested were a single mid-postemergence application of carfentrazone-ethyl plus dicamba (9 + 280 g/ha), two applications of carfentrazone-ethyl alone at early postemergence and late postemergence, and three POST applications of carfentrazone-ethyl, which controlled volunteer potato 77 to 87% in early June, reduced weight of tubers produced by 76 to 96% compared with nontreated checks, and prevented corn yield loss compared with hand-weeded checks. Herbicide treatments reduced potato tuber weight more than tuber number.

Keywords

Carfentrazone-ethyldicambafield corn, Zea mays L.potato, Solanum tuberosum L. ‘Russet Burbank’Groundkeeper (volunteer potato)EPOST, early postemergenceLPOST, late postemergenceMPOST, mid-postemergencePOST, postemergence
Type
Research
Information
Weed Technology , Volume 18 , Issue 1 , March 2004 , pp. 83 - 87
Copyright
Copyright © Weed Science Society of America 

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