Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields

Vista sencilla de ítem
dc.creatorHellen Martins da Silveira
dc.creatorAna Claudia Langaro
dc.creatorRicardo Alcántara-de la Cruz
dc.creatorTocio Sediyama
dc.creatorAntonio Alberto da Silva
dc.date2018
dc.date.accessioned2026-07-07T03:54:29Z
dc.descriptionIn Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate susceptibility ranking of the sourgrass biotypes was MG < GO < MT < BA. The MT and BA biotypes demonstrated high glyphosate resistance levels, and the GO biotype had a high potential to develop resistance. Farmers should avoid the application of glyphosate overdoses to minimize the selection pressure on weeds.
dc.formatapplication/pdf
dc.identifier1679-9275
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303058204015
dc.identifierhttps://www.redalyc.org/journal/3030/303058204015/
dc.identifierhttps://www.redalyc.org/journal/3030/303058204015/html/
dc.identifierhttps://www.redalyc.org/journal/3030/303058204015/303058204015.epub
dc.identifierhttps://www.redalyc.org/journal/3030/303058204015/movil
dc.identifier10.4025/actasciagron.v40i1.35120
dc.identifier.urihttp://hdl.handle.net/123456789/446955
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3030
dc.rightsActa Scientiarum. Agronomy
dc.sourceActa Scientiarum. Agronomy (Brasil) Vol.40
dc.subjectAgrociencias
dc.titleGlyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields
dc.typeartículo científico

Archivos

Colecciones

Acta Scientiarum. Agronomy - Universidade Estadual de Maringá