| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000418100 |
| ISSN: | 0001-3765 |
| Authors: | Wandscheer, Alana C.D1 Marchesan, Enio1 Santos, Sandro2 Zanella, Renato3 Silva, Marilia F1 Londero, Guilherme P1 Donato, Gabriel1 |
| Institutions: | 1Universidade Federal de Santa Maria, Centro de Ciencias Rurais, Santa Maria, Rio Grande do Sul. Brasil 2Universidade Federal de Santa Maria, Centro de Ciencias Naturais e Exatas, Santa Maria, Rio Grande do Sul. Brasil 3Universidade Federal de Santa Maria, Departamento de Quimica, Santa Maria, Rio Grande do Sul. Brasil |
| Year: | 2017 |
| Season: | Mar |
| Volumen: | 89 |
| Number: | 1 |
| Pages: | 355-369 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The objective of this study was to verify the richness and density of aquatic benthic macroinvertebrates after exposure to fungicides and insecticides of the rice paddy fields. In the crop seasons of 2012/13 and 2013/14, field experiments were performed, which consisted of single-dose applications of the fungicides trifloxystrobin + tebuconazole and tricyclazole, and the insecticides lambda-cyhalothrin + thiamethoxam and diflubenzuron, in 10 m2 experimental plots, over rice plants in the R3 stage. Control plots with and without rice plants were maintained in order to simulate a natural environment. Soil samples were collected during rice cultivation for assessment of the macroinvertebrate fauna. Chemical-physical parameters assessed in the experiments included temperature, pH and oxygen dissolved in the water and pesticide persistence in the water and in the soil. The application of a single dose of the pesticides and fungicides in the recommended period does not cause significant negative effects over the richness and density of the macroinvertebrates. Tebuconazole, tricyclazole and thiamethoxam showed high persistence in the irrigation water of rice paddy fields. Thus, the doses and number of applications of these products in crops should be carefully handled in order to avoid contamination of the environment |
| Disciplines: | Biología, Agrociencias |
| Keyword: | Ecología, Plaguicidas, Contaminación del agua, Riqueza de especies, Densidad poblacional, Macroinvertebrados acuáticos, Arroz, Oryza sativa |
| Keyword: | Ecology, Pesticides, Water pollution, Species richness, Population density, Aquatic macroinvertebrates, Rice, Oryza sativa |
| Full text: | Texto completo (Ver HTML) |
