Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control
ABSTRACT: Cyhalofop-butyl stands out among the herbicides in the control of imidazolinone-resistant Echinochloa species; but, rice farmers are not always satisfied with the control achieved with this herbicide. The objectives were to evaluate in regional scale the susceptibility of Echinochloa popul...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
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| Series: | Ciência Rural |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400153&lng=en&tlng=en |
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| author | Augusto Kalsing Sérgio Mateus Tronquini Carlos Henrique Paim Mariot Rogerio da Silva Rubin Angela Da Cas Bundt Dauri Aparecido Fadin Luiz Henrique Marques |
| author_facet | Augusto Kalsing Sérgio Mateus Tronquini Carlos Henrique Paim Mariot Rogerio da Silva Rubin Angela Da Cas Bundt Dauri Aparecido Fadin Luiz Henrique Marques |
| author_sort | Augusto Kalsing |
| collection | DOAJ |
| description | ABSTRACT: Cyhalofop-butyl stands out among the herbicides in the control of imidazolinone-resistant Echinochloa species; but, rice farmers are not always satisfied with the control achieved with this herbicide. The objectives were to evaluate in regional scale the susceptibility of Echinochloa populations to cyhalofop-butyl, and quantify the effect of the weed phenology on its efficacy of control. For this, three trials were carried out under greenhouse conditions with a fully random design, using Echinochloa populations collected in rice fields in the southern region of Brazil. In two trials, the susceptibility level of 156 (2012/13 growth season) and 103 (2013/14 growth season) populations were evaluated with the application of cyhalofop-butyl at 360g ha-1. In other trial, in which treatments were arranged in a bi-factorial design (A = 6 x B = 5), it was evaluated six cyhalofop-butyl rates and five phenological stages of E. crus-galli populations. Echinochloa populations had showed differential susceptibility to cyhalofop-butyl, especially in the 2013/14 growth season, where 20 out of the 103 populations had control lower than 90%. The efficacy of this herbicide was inversely proportional to the phenological stage, and the application timing delay contributed directly to the decrease of susceptibility to the herbicide. Cyhalofop-butyl is an effective alternative to control imidazolinone-resistant Echinochloa populations, as long as the application timing occurs in the early phenological stages (2 to 4 leaves). |
| first_indexed | 2024-12-19T20:46:24Z |
| format | Article |
| id | doaj.art-a1ad9b05642b4ea8b77b6cb06a6631ae |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-19T20:46:24Z |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-a1ad9b05642b4ea8b77b6cb06a6631ae2022-12-21T20:06:14ZengUniversidade Federal de Santa MariaCiência Rural1678-459647410.1590/0103-8478cr20160839S0103-84782017000400153Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of controlAugusto KalsingSérgio Mateus TronquiniCarlos Henrique Paim MariotRogerio da Silva RubinAngela Da Cas BundtDauri Aparecido FadinLuiz Henrique MarquesABSTRACT: Cyhalofop-butyl stands out among the herbicides in the control of imidazolinone-resistant Echinochloa species; but, rice farmers are not always satisfied with the control achieved with this herbicide. The objectives were to evaluate in regional scale the susceptibility of Echinochloa populations to cyhalofop-butyl, and quantify the effect of the weed phenology on its efficacy of control. For this, three trials were carried out under greenhouse conditions with a fully random design, using Echinochloa populations collected in rice fields in the southern region of Brazil. In two trials, the susceptibility level of 156 (2012/13 growth season) and 103 (2013/14 growth season) populations were evaluated with the application of cyhalofop-butyl at 360g ha-1. In other trial, in which treatments were arranged in a bi-factorial design (A = 6 x B = 5), it was evaluated six cyhalofop-butyl rates and five phenological stages of E. crus-galli populations. Echinochloa populations had showed differential susceptibility to cyhalofop-butyl, especially in the 2013/14 growth season, where 20 out of the 103 populations had control lower than 90%. The efficacy of this herbicide was inversely proportional to the phenological stage, and the application timing delay contributed directly to the decrease of susceptibility to the herbicide. Cyhalofop-butyl is an effective alternative to control imidazolinone-resistant Echinochloa populations, as long as the application timing occurs in the early phenological stages (2 to 4 leaves).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400153&lng=en&tlng=enbarnyardgrassdevelopment stageimidazolinonesEchinochloa crus-galliEchinochloa colona |
| spellingShingle | Augusto Kalsing Sérgio Mateus Tronquini Carlos Henrique Paim Mariot Rogerio da Silva Rubin Angela Da Cas Bundt Dauri Aparecido Fadin Luiz Henrique Marques Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control Ciência Rural barnyardgrass development stage imidazolinones Echinochloa crus-galli Echinochloa colona |
| title | Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control |
| title_full | Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control |
| title_fullStr | Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control |
| title_full_unstemmed | Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control |
| title_short | Susceptibility of Echinochloa populations to cyhalofop-butyl in Southern region of Brazil and impact of the weed phenology on its efficacy of control |
| title_sort | susceptibility of echinochloa populations to cyhalofop butyl in southern region of brazil and impact of the weed phenology on its efficacy of control |
| topic | barnyardgrass development stage imidazolinones Echinochloa crus-galli Echinochloa colona |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400153&lng=en&tlng=en |
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