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Functional relationships between giant ragweed (Ambrosia trifida) interference and sweet corn yield and ear traits

Published online by Cambridge University Press:  20 January 2017

Martin M. Williams II  and
John B. Masiunas
John B. Masiunas
Affiliation:
Department of Natural Resources and Environmental Sciences, University of Illinois, 1201 West Gregory Drive, Urbana, IL 61801
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Abstract

Field experiments were conducted to quantify functional relationships between giant ragweed density and sweet corn yield and ear traits. A rectangular hyperbolic model was fit to yield loss measured in terms of marketable ear mass, appropriate for the processing industry, and boxes of 50 marketable ears, relevant to the fresh market industry. The initial slope of the hyperbolic yield loss function (I), which describes the linear portion of yield loss as weed density (weeds per square meter) approaches zero, was 119 for loss of ear mass and 97 for loss of boxes of ears. Furthermore, 10 of 12 ear traits including green ear mass, husked ear mass, ear length, filled ear length, ear width, number of kernels per row, number of rows, kernel depth, kernel mass, and kernel moisture content were significantly affected by giant ragweed interference.

Keywords

Giant ragweed, Ambrosia trifida L. AMBTRsweet corn, Zea mays L. ‘GH0937’Competitioncrop qualityeconomic thresholdyield loss
Type
Research Article
Information
Weed Science , Volume 54 , Issue 5 , October 2006 , pp. 948 - 953
Copyright
Copyright © Weed Science Society of America 

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