Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.

ABSTRACT Echinochloa colona (L.) Link is one of the most troublesome weed species in rice (Oryza sativa L.) crops. Despite numerous cases of herbicide resistance in E. colona worldwide, in Colombia the reports are scarce and most of them dating from over two decades ago. To screen the resistance of...

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Autores principales: Zabala,Diana, Carranza,Nelson, Darghan,Aquiles, Plaza,Guido
Lenguaje:English
Publicado: Instituto de Investigaciones Agropecuarias, INIA 2019
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000400576
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spelling oai:scielo:S0718-583920190004005762019-11-19Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.Zabala,DianaCarranza,NelsonDarghan,AquilesPlaza,Guido Cross-resistance joint count analysis junglerice screening mixed model spatial autocorrelation. ABSTRACT Echinochloa colona (L.) Link is one of the most troublesome weed species in rice (Oryza sativa L.) crops. Despite numerous cases of herbicide resistance in E. colona worldwide, in Colombia the reports are scarce and most of them dating from over two decades ago. To screen the resistance of E. colona to bispyribac-sodium, cyhalofop-butyl and quinclorac, in the Saldaña and Purificación counties, a survey was carried out in 23 rice fields, through a grid of 26 squares of 2.56 km2 each. Seedlings from 23 populations were treated with commercial formulations from these respective herbicides at their recommended (1x) dose and twice the dose (2x) under controlled conditions. Relative fresh weight and percent control were evaluated. Populations with relative fresh weight greater than 20% and control below 80%, were categorized as resistant. For statistical analysis, a mixed model was used with populations as a random effect. The distribution of resistance was evaluated by a spatial autocorrelation analysis. It was established that 91% of populations were resistant to bispyribac-sodium, 48% to cyhalofop-butyl and 43% to quinclorac. Sixty-five percent had multiple resistance to two herbicides and 22% to three herbicides. Resistance was randomly distributed, according to the results obtained from the mixed model that showed a homogeneous response of populations within fields and heterogeneous among fields. This indicates that management strategies at field level generate a local selection pressure that determines the evolution of the resistance independently in each field.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.79 n.4 20192019-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000400576en10.4067/S0718-58392019000400576
institution Scielo Chile
collection Scielo Chile
language English
topic Cross-resistance
joint count analysis
junglerice
screening
mixed model
spatial autocorrelation.
spellingShingle Cross-resistance
joint count analysis
junglerice
screening
mixed model
spatial autocorrelation.
Zabala,Diana
Carranza,Nelson
Darghan,Aquiles
Plaza,Guido
Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
description ABSTRACT Echinochloa colona (L.) Link is one of the most troublesome weed species in rice (Oryza sativa L.) crops. Despite numerous cases of herbicide resistance in E. colona worldwide, in Colombia the reports are scarce and most of them dating from over two decades ago. To screen the resistance of E. colona to bispyribac-sodium, cyhalofop-butyl and quinclorac, in the Saldaña and Purificación counties, a survey was carried out in 23 rice fields, through a grid of 26 squares of 2.56 km2 each. Seedlings from 23 populations were treated with commercial formulations from these respective herbicides at their recommended (1x) dose and twice the dose (2x) under controlled conditions. Relative fresh weight and percent control were evaluated. Populations with relative fresh weight greater than 20% and control below 80%, were categorized as resistant. For statistical analysis, a mixed model was used with populations as a random effect. The distribution of resistance was evaluated by a spatial autocorrelation analysis. It was established that 91% of populations were resistant to bispyribac-sodium, 48% to cyhalofop-butyl and 43% to quinclorac. Sixty-five percent had multiple resistance to two herbicides and 22% to three herbicides. Resistance was randomly distributed, according to the results obtained from the mixed model that showed a homogeneous response of populations within fields and heterogeneous among fields. This indicates that management strategies at field level generate a local selection pressure that determines the evolution of the resistance independently in each field.
author Zabala,Diana
Carranza,Nelson
Darghan,Aquiles
Plaza,Guido
author_facet Zabala,Diana
Carranza,Nelson
Darghan,Aquiles
Plaza,Guido
author_sort Zabala,Diana
title Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
title_short Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
title_full Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
title_fullStr Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
title_full_unstemmed Spatial distribution of multiple herbicide resistance in Echinochloa colona (L.) Link.
title_sort spatial distribution of multiple herbicide resistance in echinochloa colona (l.) link.
publisher Instituto de Investigaciones Agropecuarias, INIA
publishDate 2019
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392019000400576
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AT carranzanelson spatialdistributionofmultipleherbicideresistanceinechinochloacolonallink
AT darghanaquiles spatialdistributionofmultipleherbicideresistanceinechinochloacolonallink
AT plazaguido spatialdistributionofmultipleherbicideresistanceinechinochloacolonallink
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