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Grain Rye Residues and Weed Control Strategies in Reduced Tillage Potatoes

Published online by Cambridge University Press:  12 June 2017

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

Experiments were conducted to evaluate the effect of tillage, rye residue levels, and control strategies on weed suppression and potato yield. Reduced tillage (RT) yields in 1989 were lower than in conventional tillage (CT) due to high hairy galinsoga populations. However, in 1990, potato yields were greater in RT when early emerging weeds were suppressed. Increasing residue levels up to 2300 kg ha-1 had no effect on weeds or yields in either year. In a separate study, preemergence herbicides (linuron plus metolachlor, 1.7 kg ai ha-1 each) applied 10 d after planting (DAP) in reduced tillage controlled weeds for 6 wk, but efficacy decreased after hilling. Metribuzin applied postemergence (0.19 kg ai ha-1) 7 d after hilling controlled late germinating weeds. Potato yields were greatest when the preemergence herbicides were applied.

Keywords

Linuron, N′-(3,4-dichlorophenyl)-N-methoxy-N-methylurea; 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, Solarium tuberosum L. ‘Norchip’rye, Secale cereale L.hairy galinsoga, Galinsoga ciliata (Raf.) Blake # GASCIMulch residueslow-rate herbicidesminimum tillagelinuronmetolachlormetribuzinGalinsoga ciliataSecale cerealeSolanum tuberosumGASCI
Type
Research
Information
Weed Technology , Volume 6 , Issue 4 , December 1992 , pp. 1021 - 1026
Copyright
Copyright © 1990 by the Weed Science Society of America 

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