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| Vargas,L.; Silva,D.R.O.; Agostinetto,D.; Matallo,M.B.; Santos,F.M.; Almeida,S.D.B.; Chavarria,G.; Silva,D.F.P.. |
| The objective of this study was to determine changes in gas exchange and inhibition of EPSPs, based on the accumulation of shikimic acid in horseweed biotypes resistant and sensitive to glyphosate. Two experiments were conducted in a factorial model. The first one evaluated horseweed biotypes (one resistant and one susceptible to glyphosate), and herbicide rates (0 and 1,080 g a.e. ha ¹) applied on the weed. In the second experiment, the horseweed biotypes (susceptible and resistant to glyphosate) were evaluated in five periods as following: 0, 3, 7, 10, and 14 days after herbicide application (DAH). The photosynthetic rate, transpiration, carboxylation efficiency, and water efficiency were determined using an infrared gas analyzer (IRGA), and shikimic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hairy fleabane; Resistance; Photosynthesis; EPSPs; Shikimic acid. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100017 |
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| GAZOLA,T.; DIAS,M.F.; CARBONARI,C.A.; VELINI,E.D.. |
| ABSTRACT: The objective of this work was to monitor the resistance of sourgrass (Digitaria insularis) to glyphosate in urban areas of the State of São Paulo to understand the spread of resistant biotypes. Three experiments were conducted under greenhouse conditions in a completely randomized design, with four replications. In the first experiment, seven sourgrass biotypes were used, and the control of plants was evaluated at 7, 14, 21, 28, and 35 days after application (DAA) of glyphosate. In the second experiment, the shikimic acid accumulation was quantified at 72 hours after the glyphosate application, and the same evaluations of weed control were performed. In the third experiment, rate-response curves were developed, with glyphosate at rates of 0, 90,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shikimic acid; Digitaria insularis; EPSPS; Resistance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100183 |
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