| Journal: | Fitopatologia brasileira |
| Database: | PERIÓDICA |
| System number: | 000295702 |
| ISSN: | 0100-4158 |
| Authors: | Ferreira, Eraclides M1 Alfenas, Acelino C Maffia, Luiz A Mafia, Reginaldo G |
| Institutions: | 1Universidade Federal de Vicosa, Departamento de Fitopatologia, Vicosa, Minas Gerais. Brasil |
| Year: | 2006 |
| Season: | Sep-Oct |
| Volumen: | 31 |
| Number: | 5 |
| Pages: | 468-475 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Several Cylindrocladium species may cause diseases in eucalyptus mini-cuttings. Although the use of fungicides is sometimes indicated, there are few studies evaluating fungicides in eucalyptus nurseries. Therefore, systemic fungicides were used against C. candelabrum to evaluate their protective, curative, and antisporulating effects, as well as their translocation and persistence in eucalyptus plants. Under in vitro conditions, azoxystrobin (AZO), triadimenol (TRI), boscalid (BOS), pyraclostrobin (PYR), carbendazim (CAR), tetraconazol (TET), tebuconazol (TEB), epoxiconazol +pyraclostrobin (EPO-PYR) and epoxiconazol (EPO), were used in the following concentrations: 0,1, 1, 5, 10, 50, 100 and 1000 µg a.i/mL. For the in vivo experiment, a clone (Eucalyptus grandis x E. urophylla) susceptible to C. candelabrum was used. The fungicides were sprayed on both leaf sides (except for the translaminar activity evaluation), the plants were allowed to dry out for 24 h, and inoculated with a 10(5) conidia/mL suspension. Protective effect of AZO (0.2; 0.25; 0.4; 0.65 and 0.8 g/L), EPO (0.75; 1.125; 1.5; 1.875 and 2.25 mL/L), EPO-PYR (1.25; 1.875; 2.5; 3.125 and 3.75 mL/L), PYR (0.75; 1.125; 1.5; 1.875 and 2.25 mL/L) and TEB (0.75; 1.125; 1.5; 1.875 and 2.25 mL/L), was evaluated at different concentrations. In subsequent experiments, the following fungicides (concentrations) were used: AZO (0.4 g/L), EPO (1.5 mL/L), EPO-PYR (2.5 mL/L) and TEB (1.5 mL/L). The fungicides EPO, EPO-PYR and TEB promoted protective, curative, and antisporuling effects, as well as translaminar translocation and persistence in the leaves |
| Portuguese abstract | Várias espécies de Cylindrocladium podem causar doenças em mudas de eucalipto, na propagação clonal. Apesar de, em algumas situações, fungicidas serem imprescindíveis no controle desses patógenos, faltam estudos para avaliar a efetividade desses produtos. Por isso, objetivou-se selecionar fungicidas sistêmicos para controlar C. candelabrum, determinar o efeito protetor, curativo e anti-esporulante dos fungicidas, sua translocação e persistência em plantas de eucalipto. Nos experimentos in vitro foram testados: azoxystrobin (AZO), triadimenol (TRI), boscalid (BOS), pyraclostrobin (PYR), carbendazim (CAR), tetraconazole (TET), tebuconazole (TEB), epoxiconazole+pyraclostrobin (EPO-PYR) e epoxiconazole (EPO) nas concentrações 0,1, 1, 5, 10, 50, 100 e 1000 µg de i.a/mL. Nos experimentos in vivo, utilizou-se um clone suscetível a C. candelabrum (Eucalyptus grandis x E. urophylla). Excetuando-se o estudo da atividade translaminar, aplicaram-se os fungicidas, em ambas as faces do limbo foliar. Após 24 h, as plantas foram inoculadas com suspensão de 10(5) conídios/mL de C. candelabrum. Testou-se o efeito protetor dos fungicidas, em diferentes concentrações: AZO (0,2; 0,25; 0,4; 0,65 e 0,8 g/L), EPO (0,75; 1,125; 1,5; 1,875 e 2,25 mL/L), EPO-PYR (1,25; 1,875; 2,5; 3,125 e 3,75 mL/L), PYR (0,75; 1,125; 1,5; 1,875 e 2,25 mL/L) e TEB (0,75; 1,125; 1,5; 1,875 e 2,25 mL/L), selecionados nos testes in vitro. Para avaliar o efeito curativo, anti-esporulante, a persistência e a atividade translaminar, utilizaram-se os fungicidas: AZO (0,4 g/L), EPO |
| Disciplines: | Agrociencias |
| Keyword: | Fitopatología, Silvicultura, Hongos, Eucalyptus, Estacas, Triazoles, Cylindrocladium candelabrum, Estrobilurina, Fungicidas, Brasil |
| Keyword: | Agricultural sciences, Phytopathology, Silviculture, Fungi, Eucalyptus, Fungicides, Cuttings, Triazole, Strobilurin, Cylindrocladium candelabrum, Brazil |
| Full text: | Texto completo (Ver HTML) |
