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| Mendes,Fabiana; Figueiredo,Gisela M. de; Valentin,Jean L.. |
| The aim of this study was to describe the total density, densities of developmental stages and the reproduction period of Parasagitta friderici. Weekly samples were collected at one station in the channel of Guanabara Bay, Rio de Janeiro, during one year. Three vertical hauls were made for each sample, and P. friderici was separated, the developmental stages were identified, and body length (BL), ovary length (OL) and seminal vesicle width (SVW) were measured. Throughout the year P. friderici was the most abundant chaetognath species occurring in all four developmental stages, the densities of which varied from week to week. Higher densities of adults occurred in the spring, followed by peaks of juveniles in the summer. Although P. friderici seems to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chaetognath; Development stage; Guanabara Bay; Reproduction. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100010 |
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| Kalsing,Augusto; Tronquini,Sérgio Mateus; Mariot,Carlos Henrique Paim; Rubin,Rogerio da Silva; Bundt,Angela Da Cas; Fadin,Dauri Aparecido; Marques,Luiz Henrique. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barnyardgrass; Development stage; Imidazolinones; Echinochloa crus-galli; Echinochloa colona. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400153 |
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