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Smooth Pigweed (Amaranthus hybridus L.) and Livid Amaranth (Amaranthus lividus) Interference with Cucumber (Cucumis sativus)

Published online by Cambridge University Press:  20 January 2017

Adrian D. Berry ,
William M. Stall ,
B. Rathinasabapathi ,
Gregory E. Macdonald  and
R. Charudattan
Adrian D. Berry*
Affiliation:
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
William M. Stall
Affiliation:
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
B. Rathinasabapathi
Affiliation:
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
Gregory E. Macdonald
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611
R. Charudattan
Affiliation:
Plant Pathology Department, University of Florida, Gainesville, FL 32611
*
Corresponding author's E-mail: [email protected]
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Abstract

Field studies were conducted to determine the effect of season-long interference of smooth pigweed or livid amaranth on the shoot dry weight and fruit yield of cucumber. Smooth pigweed or livid amaranth densities as low as 1 to 2 weeds per m2 caused a 10% yield reduction in cucumber. The biological threshold of smooth pigweed or livid amaranth with cucumber is between 6 to 8 weeds per m2. Consequently, weed interference resulted in a reduction in cucumber fruit yield. Smooth pigweed, livid amaranth, and cucumber plant dry weight decreased as weed density increased. Evaluation of smooth pigweed, livid amaranth, and cucumber mean dry weights in interspecific competition studies indicated that cucumber reduced the dry weight of both species of amaranths.

Keywords

Smooth pigweed, Amaranthus hybridus # AMACHlivid amaranth, Amaranthus lividus # AMALIcucumber, Cucumis sativus L.Additive experimentamaranthcucumberweed competitionyield loss
Type
Research Article
Information
Weed Technology , Volume 20 , Issue 1 , March 2006 , pp. 227 - 231
Copyright
Copyright © Weed Science Society of America 

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