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Effect of Weed Emergence Time and Intervals of Weed and Crop Competition on Potato Yield

Published online by Cambridge University Press:  20 January 2017

Steponas Ciuberkis ,
Stasys Bernotas ,
Steponas Raudonius  and
Joel Felix
Steponas Ciuberkis*
Affiliation:
Doctor Habilitatus, Head of Region Agriculture Department Vezaiciai Branch of the Lithuanian Institute of Agriculture, Gargzdu 29, LT-96216, Klaipeda district, Lithuania
Stasys Bernotas
Affiliation:
Senior Research of Region Agriculture Department Vezaiciai Branch of the Lithuanian Institute of Agriculture, Gargzdu 29, LT-96216, Klaipeda district, Lithuania
Steponas Raudonius
Affiliation:
Dr. of Soil Management Department, Lithuanian University of Agriculture, Studentu 11, LT-53067 Akademija, Kaunas district, Lithuania
Joel Felix
Affiliation:
Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Ave, Wooster, OH 44691, USA
*
Corresponding author's E-mail: stepas@vezaiciai.lzi.lt
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Abstract

A field study was conducted at Vezaiciai branch of the Lithuanian Institute of Agriculture from 1998 to 2000 to determine weed emergence dynamics in potato and to estimate the effect of different intervals of weed crop competition on potato tuber yield. Treatments varying in intervals of weed-free conditions and competition were laid out in a randomized complete block design with six replications. The greatest emergence of annual broadleaf weeds (62 to 86% of the season total) in the crop was observed in the period from potato planting until flowering. Emergence of winter annuals such as field violet and scentless mayweed was greatest in the period from the 20-cm potato plant height until harvesting. Competition was most detrimental to potato tuber yield in the periods from planting until flowering, from planting until 25 d after flowering, or for the entire growing season. Potato tuber yield decreased by 8.1, 8.4, and 6.4%, respectively, during these competition intervals compared to the weed-free treatment. The results indicated that the critical weed-free period, when weed competition was detrimental to yield, started from planting until 25 d after flowering if regular interrow cultivation was applied.

Keywords

Field violet, Viola arvensis Mur VIOARscentless mayweed, Tripleurospermum perforatum (Merat) M.Lainz MATINPotato, Solanum tuberosum L. ‘Mirta’Crop growth stagesweed emergencepotatocompetition
Type
Research
Information
Weed Technology , Volume 21 , Issue 1 , March 2007 , pp. 213 - 218
Copyright
Copyright © Weed Science Society of America 

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