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Effect of No-Till or Conventional Planting and Cover Crops Residues on Weed Emergence in Vegetable Row Crop

Published online by Cambridge University Press:  20 January 2017

R. Edward Peachey ,
Ray D. William  and
Carol Mallory-Smith
R. Edward Peachey*
Affiliation:
Department of Horticulture, Oregon State University, 4017 ALS, Corvallis, OR 97331-7304
Ray D. William
Affiliation:
Department of Horticulture, Oregon State University, 4017 ALS, Corvallis, OR 97331-7304
Carol Mallory-Smith
Affiliation:
Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331-7304
*
Corresponding author's E-mail: peacheye@science.oregonstate.edu
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Abstract

The effect of planting system and cover crop residues on weed emergence in irrigated vegetable row crops was studied in field experiments from 1995 through 1997. Vegetable crops were either no-till planted (NTP) through cover crop residues or conventionally planted (CP) into soil with cover crop residues incorporated. NTP reduced emergence of hairy nightshade by 77 to 99% and Powell amaranth emergence by 50 to 87% compared with CP. Cover crop treatments were much less important than planting system in regulating weed emergence. Tillage in the spring did not increase the number of viable seeds near the soil surface. Hairy nightshade emergence ranged from 0.6 to 9.8% of the intact seeds in CP compared with 0 to 0.1% emergence of the seeds in the NTP plots. Powell amaranth emergence ranged from 4.9 to 6.5% of the intact seeds in CP contrasted with only 0.4 to 0.9% emergence of the seeds in NTP plots.

Keywords

Hairy nightshade, Solanum sarrachoides Sendtner #3 SOLSAPowell amaranth, Amaranthus powellii S. Wats # AMAPOConventional tillagecover cropsno tillno-till plantingprimary tillageweed emergenceweed seedbankCP, conventionally plantedNT, no tillNTP, no-till plantedWAP, weeks after planting.
Type
Research
Information
Weed Technology , Volume 18 , Issue 4 , December 2004 , pp. 1023 - 1030
Copyright
Copyright © Weed Science Society of America 

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