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Reduced Rates of Herbicides Following Hilling Controlled Weeds in Conventional and Reduced Tillage Potato (Solanum tuberosum) Production

Published online by Cambridge University Press:  12 June 2017

Robin R. Bellinder ,
Russell W. Wallace  and
Erik D. Wilkins
Robin R. Bellinder
Affiliation:
Dep. Fruit and Veg. Sci., Plant Sci. Bldg., Cornell Univ., Ithaca, NY 14853-0327
Russell W. Wallace
Affiliation:
Dep. Fruit and Veg. Sci., Plant Sci. Bldg., Cornell Univ., Ithaca, NY 14853-0327
Erik D. Wilkins
Affiliation:
Dep. Fruit and Veg. Sci., Plant Sci. Bldg., Cornell Univ., Ithaca, NY 14853-0327
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Abstract

Time of hilling (4, 5, or 6 weeks after planting; WAP) and 0.5x, 1x, and split (0.5x + 0.5x) rates of metolachlor + metribuzin were evaluated in conventional tillage (CT) and rye-stubble, reduced tillage (RT) potato plots. Weed populations 4 to 10 WAP were generally higher in CT than in RT. Weed control was excellent in both tillage systems when 1x rates of metolachlor + metribuzin were applied delayed preemergence, or in a split application where 0.5x was applied delayed PRE and hilled 6 WAP, and followed with a second application of 0.5x metolachlor + metribuzin 7 days after hilling (DAH). Weed control with 0.5x rates of metolachlor + metribuzin applied 7 DAH, when hilled 4 and 5 WAP, was equivalent to the lx and split-rate treatments. Weed control was reduced only when hilling was delayed to 6 WAP and 0.5x of metolachlor + metribuzin applied 7 DAH. Total yields were not influenced by tillage, hilling, or herbicide treatment, however, larger numbers of green and small-sized tubers reduced marketable yields in RT.

Keywords

Metolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onepotato, Solanum tuberosum L. ‘Katahdin’rye, Secale cereale L.Herbicide reductionminimum tillagerye mulch
Type
Research
Information
Weed Technology , Volume 10 , Issue 2 , June 1996 , pp. 311 - 316
Copyright
Copyright © 1996 by the Weed Science Society of America 

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