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Highlighting Differential Control of Weeds by Management Methods Using an Ordination Technique

Published online by Cambridge University Press:  20 January 2017

Per Milberg  and
Erik Hallgren
Per Milberg*
Affiliation:
Department of Biology—IFM, Linköping University, SE-581 83 Linköping, Sweden
Erik Hallgren
Affiliation:
Department of Ecology & Crop Production Science, SLU, Box 7043, SE-750 07 Uppsala, Sweden
*
Corresponding author's E-mail: permi@ifm.liu.se
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Abstract

We demonstrate how direct (constrained) ordination methods can be used to analyze differential control by different weed management tactics. Weed biomass data of individual weed species were compiled for 110 trials on potatoes, each of which included a mechanical control treatment, a herbicide treatment, and an untreated control. We used “trial id” as 110 categorical dummy covariables, thereby eliminating between-trial variation, and made direct comparisons between the data from numerous trials. Unweeded plots had the largest biomass of all species as expected. Contrasting the results for the standard herbicide and the mechanical control treatments in a separate analysis, we could rank species from those best controlled by the herbicide (several annuals) to those best controlled by the mechanical treatment (a perennial grass and a climbing annual).

Keywords

PotatoSolanum tuberosum L.Metribuzinmultivariate analysisredundancy analysisselectivitySwedenweed communitypRDA, partial Redundancy AnalysisRDA, Redundancy Analysis
Type
Note
Information
Weed Technology , Volume 16 , Issue 3 , September 2002 , pp. 675 - 679
Copyright
Copyright © Weed Science Society of America 

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