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| NÚÑEZ FRÉ,F.R.; JUAN,V.F.; SAINT ANDRÉ,H.M.; CHANTRE,G.R.. |
| ABSTRACT: David’s Spurge is an spring-summer annual weed, present in the central area of Buenos Aires Province, Argentina. Field studies were carried out during 2011/12 and 2013/14 to assess demography and population dynamics and determine a thermal time scale of this species. At the experimental site, 1 m² quadrants were established as observational plots, four per cohort. The number of individuals at each phenological stage and from each cohort was recorded weekly. At the end of the experiment, all plots were harvested, and seed production was determined. A thermal time scale was established to identify the occurrence of the different phenological events. Three cohorts were detected, the first one emerged in mid-October, the second one in early November,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cohort; EUDA5; Life table; Weed; Thermal time; Euphorbiaceae. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100288 |
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| NÚÑEZ FRÉ,F.R.; JUAN,V.F.; YANNICCARI,M.; SAINT ANDRÉ,H.M.; FERNANDEZ,R.R.. |
| ABSTRACT: Euphorbia davidii (Euphorbiaceae) is a summer annual weed present in the Province of Buenos Aires, Argentina. The aim of this study was to compare the sensitivity to glyphosate of different populations of Euphorbia davidii. Two techniques were used: a seed bioassay and shikimate determination in glyphosate-treated plants. Germination rates of seeds belonging to the populations from Espartillar, Barrow, Olavarria and Azul exposed to different concentrations of glyphosate were compared. Plants from the same locations treated with glyphosate were evaluated to determine shikimate levels. The most sensitive population was from Espartillar, with a CE50 (average effective concentration) of 4.00 g e.a. L-1. Based on this finding, the resistance index for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide resistance; Germination; Bioassay; Shikimate; EUDA5. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100209 |
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