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Risk assessment of the herbicide clomazone in the aquatic life. Repositório Alice
JONSSON, C. M.; FERREIRA, C.J.A.; RIBEIRO, E.O..
Clomazone (2-(2-chlorophenyl)methyl-4.4-dimethyl-3-isoxazolidinone) is a post emergence herbicide widely used in rice fields in Rio Grande do Sul (Brazil) with high activity against Gramineae at the recommended application rate(AR).of 700g/ha. The herbicide input into the aquatic ecosystem may occur by aerial application or water drainage. The presence of this chemical in the water may affect non-target organisms leading to impairments in the aquatic food chain. Studies were conducted in this work to evaluate the risk of Clomazone using the estimated mean affective concentration (EC50) for the microalgae Selenastrum capricornutum(96h), the duckweed Lemna valdiviana(96h) and the crustacean Daphnia similis(48h). The EC50 values were 11.2; 31.7 and 13.8 mg/l,...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Risk assessment; Herbicide clomazone; Aquatic life.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/12825
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Toxicity of the herbicide clomazone on duckweed Lemna valdiviana. Repositório Alice
FERREIRA, C.J.A.; PARAIBA, L. C.; URICI, E.M.T..
The duckweed Lemna valdiviana is commonly founded colonizing small shallow waters (lakes on the lowland in south Brazil. This organism may have been affected by herbicide input into lakes from aerial application and/or drainage office paddy fields. Clomazone (2- (2-chlorophenyl) methyl-4.4-dimethyl-3-isoxazolidinone) is one of the herbicides more fiequentely used as post-emergence in rice paddies. For this work assays were carried as EC50(96h) semi-statics with aseptic culture. The sterile fronds were abtained from material harvest on the paddy fields, and the concentration of Clomazone ranged from 14.0 to 229.0 mg/l. two procedures were considered: diluted in water and sprayed applicated Clomazone. The observed phytotoxic effects were evaluated by growth...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Toxicity; Herbicide clomazone; Lemna valdiviana; Duckweed.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/12824
Registros recuperados: 2
Primeira ... 1 ... Última
 

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