Lethal concentration of clomazone, metsulfuron-metil, and quinclorac for silver catfish, Rhamdia quelen, fingerlings

  • Miron D
  • Silva L
  • Golombieski J
  • et al.
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Abstract

The goal of the present work was to determine the lethal concentration (LC50) (96h) of clomazone, metsulfuron-methyl, and quinclorac, herbicides used in rice culture, for the silver catfish, Rhamdia quelen. Fingerlings were exposed to different concentrations of the herbicides. The LC50s were 7.32µL L-1 for clomazone and 395mg L-1 for quinclorac. The LC50 for metsulfuron-methyl was not obtained since all fingerlings survived even at 1200mgL-1. Probably only clomazone can lead to mortality among silver catfish reared in the rice culture system.O objetivo deste trabalho foi determinar a concentração letal (CL50 96h) de clomazone, metsulfuron-metil e quinclorac, herbicidas utilizados no cultivo de arroz, para alevinos de jundiá, Rhamdia quelen. Alevinos foram expostos a diferentes concentrações destes herbicidas. A CL50 foi 7,32µL L-1 para clomazone e 395mg L-1 para quinclorac. A CL50 para metsulfuron-metil não foi encontrada porque todos os alevinos sobreviveram mesmo à concentração de 1200mg L-1. Provavelmente apenas o clomazone pode provocar alguma mortalidade em jundiás mantidos em rizipiscicultura.

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APA

Miron, D. dos S., Silva, L. V. F. da, Golombieski, J. I., Machado, S. L. de O., Marchezan, E., & Baldisserotto, B. (2004). Lethal concentration of clomazone, metsulfuron-metil, and quinclorac for silver catfish, Rhamdia quelen, fingerlings. Ciência Rural, 34(5), 1465–1469. https://doi.org/10.1590/s0103-84782004000500021

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