Uso de armadilha visando geração de nível de ação e correlação entre captura e infestação de Hypothenemus hampei na cultura do café

• Autor(a) principal: Pereira, Adriano Elias
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3874
• topic: Broca-do-café; Captura; Semioquímicos; Nível de controle; Coffee berry borer; Capture; Semiochemicals; Level of control; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE

The decision level to control the coffee berry borer, Hypothenemus hampei, is based upon sampling damaged berries during the transition period of adult movement from berry to berry. Damaged berries include those that are from the following locations; fallen on the ground, post-harvest drying stage, remaining fruit on the plants and from neighboring coffee fields. Current sampling techniques, for determining control measures, are time consuming, giving the grower a small window of opportunity for control measures. Aiming to determine new action levels for H. hampei in coffee fields and the correlation between infestation levels and trapping of coffee berry borer, trials were carried out on four commercial coffee fields in 2005 and 2006, by using IAPAR traps baited with ethanol and methanol at a 1:3 ratio and benzaldehyde at 1% volume, releasing 98 mg/day. Twenty traps/ha were set out on each experimental area. In two fields, the area had 1 ha (20 traps set), another field had 0.75 ha (15 traps set) and the fourth had only 0.3 ha (6 traps set) due to the small size of the field. In three of the fields, trap contents were checked every two weeks and the number of H. hampei were counted as well as the number of other scolytids. In one field the sampling was done every week because of the small size of the area. Fruit from the plants were also sampled to determine percentage of damage in each field. It was noticed that during fruit maturation, between March and July, the catch was very low. Although, the adult catch started increasing sharply in August when the borers started emerging from old berries remaining on the plants and on the ground. A correlation between trap catch and infestation level of H. hampei and other scolytids was determined. The decision level to control coffee berry borer is 4 adults/trap/two weeks when coffee market prices are high and 7 adults/trap/two weeks when coffee market prices are low. During the transit period of adults moving from old to new berries the use of traps, baited with semiochemicals, provides a useful tool in determining threshold in decision level systems for controlling coffee berry borer. Due to their small numbers, other scolytids caught in the traps did not mask the interpretation of obtaining a decision level.