Data/hora: 20/06/2024 03:08:20

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 20/07/1999
Data da última atualização: | 02/09/2015
Autoria: | SILVA, C. M. M. S.; COELHO, K. C.; VIEIRA, R. F.; MAIA, A. de H. N.
Afiliação: | CÉLIA M. M. SILVA, EMBRAPA -CNPMA; ROSANA FARIA VIEIRA, CNPMA; ALINE DE HOLANDA NUNES MAIA, CNPMA.
Título: | Measurement of fungi population in soil treated with the fungicide chlorothalonil.
Ano de publicação: | 1999
Fonte/Imprenta: | In: ANNUAL MEETING OF SETAC-EUROPE, 9., 1999, Leipzig, Germany. Quality of life and environment in cultured landscapes - abstracts. Leipzig: SETAC, 1999.
Páginas: | p.227
Idioma: | Inglês
Conteúdo: | The chlorothalonil is a fungicide widely used in Brazil. This fungicide acts on the thiol groups of enzymes being therefore a nonsystemic broad-spectrum fungicide. Strong damages due to the application of the fungicides in the soil can occur to the fungi population, which are important to the terrestrial ecosystem. Several techniques have been described to quantify fungi in soil but serious sources of error exist in all of these techniques. The microbial biomass C, the soil ergosterol content and the living hyphal length were used to verify the effect of five doses of chlorothalonil on the fungi population. The results demostrated that the use of microbial biomass C, as an isolated factor, is not suited for verification of the toxic effect of the chlorothalonil on the soil fungi population comparatively to the other two techniques. The soil ergosterol content seems to be the parameter more adequate to obtain results differentiated on the fungi population, when we consider different doses. As the ergosterol content varies with the age of fungi, for a better interpretation of the results, another one that indicates growth of the soil microflora should accompany the parameter soil ergosterol content. The living hyphal length was the parameter that supplied the largest answer width in relation to the effect of the chlorothalonil on the soil fungi population, although not statistically different among doses during the period sampled. In any way the use of this late technique as comparison measurement among soils treated or not with fungicides seems appropriate, cheap, and fast.
Palavras-Chave: | Fungicide chlorothalonil.
Thesaurus Nal: | chlorothalonil.
Categoria do assunto: | --
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (3669-1) - UPC - SP - -- -  -  - 1999.00001 - DIS