Estratégia de controle químico da ferrugem em café conilon

• Autor(a) principal: Neves, Olivério Poltronieri
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/5603
• topic: Hemileia vastatrix Berk. et Br; Coffea canephora; Incidência; Severidade; Controle; Incidence; Severity; Control; Agronomia; Café - Doenças e pragas - Controle; Hemileia vastatrix; Triazóis; Café - Cultivo; 63

The rust management (Hemileia vastatrix Berk. Et Br), in the culture of conilon coffee (Coffea canephora Pierre ex Froenher) in northern of Espírito Santo has followed a practice of almost exclusive application of systemic fungicides group of triazoles in pre-fixed time. This managemt has contributed to the intensive use of fungicides may favor the emergence of strains of H. vastatrix resistant to systemic fungicides and the need for large number of applications and consequent loss of sustainability of the activity. The objective of this study was to assess the time of application of systemic fungicide to control rust in conilon coffee, based on the incidence and severity of disease. The experiments were conducted in a randomized block design with four blocks and eight treatments. Treatments were systemic fungicides applications when rust incidence reached values of 2.5% (T1), 5% (T2), 10% (T3), 15% (T4), 20% (T5) standard property (T6), the soil in March (T7) and untreated control (T8). Were assessed monthly incidence and severity of Hemileia vastatrix Berk. et Br .The monthly data evaluated about the incidence during the period of the experiment allowed calculating the Area Under Disease Progress Curve (AACPDInc.) and Maximum Intensity Disease (ymax). The incidence and severity at the end of the production cycle and AACPDInc. were subjected to analysis of variance and treatment means were compared by Tukey test at 5% using the program Assistat. Comparisons among the best controls between incidence and severity at the end of the production cycle and AACPDInc. were obtained with the application of foliar fungicide when the incidence was 2.5%, 5% and 10% and spray the soil in March. The data indicate that the incidence monitoring is a good criterion for application of systemic fungicide on crops conilon, however crops must have management strategies that enable intervention in times that the transit of people and machines in farming is hampered.