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| Registros recuperados : 41 | |
| 3. |  | FERREIRA, C. J. A. Plantas aquaticas como bioindicadores da contaminacao ambiental por agrotoxicos. In: CONGRESSO BRASILEIRO DE TOXICOLOGIA, 9., 1995, Ribeirao Preto, SP. Revista Brasileira de Toxicologia, Ribeirao Preto, Sao Paulo, v.8, n.1, p.12, 1995. Resumo. ref.1.6.2| Biblioteca(s): Embrapa Meio Ambiente. |
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| 9. | | FERREIRA, C. J. A.; CATELLA, A. C.; ALMEIRA, L. C. Baia da onca: parametros fisicos, quimicos e biologicos da lagoa, durante a fase de isolamento do Rio Aquidauana, Pantanal Mato-Grossense. In: CONGRESSO BRASILEIRO DE LIMNOLOGIA, 3., 1990, Porto Alegre. Resumos... Porto Alegre: Sociedade Brasileira de Limnologia/ UFRGS / Instituto de Biociencias, 1990. p.25| Biblioteca(s): Embrapa Pantanal. |
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| 15. | | FERREIRA, C. J. A.; SORIANO, B. M. A.; GALDINO, S.; HAMILTON, S. K. Anthropogenic factors affecting waters of the Pantanal wetland and associated rivers in the upper Paraguay River Basin of Brazil. Acta Limnologica Brasiliensia, Sao Carlos, v.5, p.135-148, 1994. Trabalho apresentado no Workshop: Brazilian Programme on Conservation and Management of Inland Waters, 1994, belo Horizonte.| Biblioteca(s): Embrapa Pantanal. |
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| Registros recuperados : 41 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
14/04/1998 |
|
Data da última atualização: |
17/08/2018 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FERREIRA, C. J. A.; PARAIBA, L. C.; URICI, E. M. T. |
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Afiliação: |
C.J.A. FERREIRA, EMBRAPA-CNPMA; LOURIVAL COSTA PARAIBA, CNPMA; E.M.T. URICI. |
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Título: |
Toxicity of the herbicide clomazone on duckweed Lemna valdiviana. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
In: CONGRESS OF INTERNATIONAL ASSOCIATION OF THEORETICAL AND APPLIED LIMNOLOGY, 26., 1995, Sao Paulo, SP. Abstracts. Sao Carlos: USP, 1995. |
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Páginas: |
p.235 |
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Idioma: |
Inglês |
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Conteúdo: |
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 rate (kt), duplication time (Td), frond yield, plant yield, mortality, chlorophyll a and b and protochlorophyll concentration. The EC50 values obtained to sprayed Clomazone (Kt=31.7; Td=31.9) were significantly small than to diluted Clomazone (Kt=46.4; td=47.3). These dadta suggest that aerial route is more hazardous than diluted procedure. Presence of chlorotic, necrotic, abnormal and died frond were common at the 114.0 and 229.0 mg/l treatment. Recuperation test corroborated the evidence that the sprayed procedure were more deleterious and L. valdiviana doesn't recovery his reproductive ability at the 114.0 and 229.0 mg/l treatment. |
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Palavras-Chave: |
Duckweed; Herbicide clomazone; Lemna valdiviana. |
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Thesaurus NAL: |
toxicity. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/145757/1/1995PL003-Paraiba-Toxicity-3415.pdf
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Marc: |
LEADER 02046nam a2200193 a 4500
001 1012824
005 2018-08-17
008 1995 bl uuuu u00u1 u #d
100 1 $aFERREIRA, C. J. A.
245 $aToxicity of the herbicide clomazone on duckweed Lemna valdiviana.$h[electronic resource]
260 $aIn: CONGRESS OF INTERNATIONAL ASSOCIATION OF THEORETICAL AND APPLIED LIMNOLOGY, 26., 1995, Sao Paulo, SP. Abstracts. Sao Carlos: USP$c1995
300 $ap.235
520 $aThe 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 rate (kt), duplication time (Td), frond yield, plant yield, mortality, chlorophyll a and b and protochlorophyll concentration. The EC50 values obtained to sprayed Clomazone (Kt=31.7; Td=31.9) were significantly small than to diluted Clomazone (Kt=46.4; td=47.3). These dadta suggest that aerial route is more hazardous than diluted procedure. Presence of chlorotic, necrotic, abnormal and died frond were common at the 114.0 and 229.0 mg/l treatment. Recuperation test corroborated the evidence that the sprayed procedure were more deleterious and L. valdiviana doesn't recovery his reproductive ability at the 114.0 and 229.0 mg/l treatment.
650 $atoxicity
653 $aDuckweed
653 $aHerbicide clomazone
653 $aLemna valdiviana
700 1 $aPARAIBA, L. C.
700 1 $aURICI, E. M. T.
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Embrapa Meio Ambiente (CNPMA) |
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