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Postemergence Broadleaf Weed Control in Potato (Solanum tuberosum) with Rimsulfuron and HOE-075032

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw ,
Dermot R. Lynch  and
Toby Entz
Robert E. Blackshaw
Affiliation:
Res. Centre, Agric. and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
Dermot R. Lynch
Affiliation:
Res. Centre, Agric. and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
Toby Entz
Affiliation:
Res. Centre, Agric. and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
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Abstract

Few postemergence (POST) herbicides provide adequate control of broadleaf weeds in potato. Field experiments were conducted at Lethbridge and Vauxhall, Alberta in 1991 and 1992 to determine the suitability of rimsulfuron and HOE-075032 for selective POST control of weeds in potato. Rimsulfuron applied at 15 to 30 g ai/ha controlled flixweed, kochia, and redroot pigweed and suppressed the growth of redstem filaree. HOE-075032 at 50 to 60 g ai/ha provided comparable control. The potato cultivars, ‘Shepody,’ ‘Norchip,’ ‘Russet Burbank,’ ‘Niska,’ and ‘Ranger Russet,’ tolerated up to 80 g/ha rimsulfuron, but rimsulfuron at 120 g/ha caused fissures in some tubers and reduced marketable and total tuber yields. Tuber quality factors such as specific gravity and chipping ability were not affected by rimsulfuron. HOE-075032 at 15 to 30 g/ha caused fissures in tubers and reduced marketable and total tuber yield of all potato cultivars. Rimsulfuron, but not HOE-075032, provided excellent selective POST broadleaf weed control in potato.

Keywords

HOE-075032, 3-(4,6-dimethoxypyrimidin-2-yl)-1-(N-methyl-N-methylsulfonyl-aminosulfonyl)-urearimsulfuron, N-[[(4,6-dimethoxy-2-pyrimidinyl)-amino]carbonyl]-3-(ethylsulfonyl)-2-pyridinesulfonamideflixweed, Descurainia sophia L. Webb ex Prantl # DESSOkochia, Kochia scoparia (L.) Schrad. # KCHSCredroot pigweed, Amaranthus retroflexus L. # AMAREredstem filaree, Erodium cicutarium (L.) L'Her. ex Ait. # EROCIpotato, Solanum tuberosum L. ‘Russet Burbank.’Crop toleranceherbicide efficacytuber yieldtuber qualityAMAREDESSOEROCIKCHSC
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 228 - 235
Copyright
Copyright © 1995 by the Weed Science Society of America 

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