Distribuição intra-planta de frutos atacados de goiaba por Conotrachelus psidii Marshall, 1922 (Coleoptera: Curculionidae) em cultivo orgânico

• Autor(a) principal: Valente, Fabricio Iglesias [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/111048
• topic: Goiaba; Goiaba - Doenças e pragas; Coleoptero; Inseto; Agricultura orgânica; Insects

The main focus of the organic system is the economic and ecological sustainability of ecosystem. The knowledge of the behavior of a pest is critical to the understanding of the intensity of their damage. This work was conducted to evaluate the vertical distribution of fruits attacked by C. psidii, as well the preferred side of the plant for feeding and oviposition on Guava fruits, and also evaluate the survival of larvae in the thirds and sides of the guava trees. The assay was developed in an organic guava orchard with approximately 3 ha. The cultivar was Paluma and the property is certified by IBD and FLO (Fair Trade). The orchard is located in the municipality of Fernando Prestes, São Paulo State, and the the data was collected in the 2012/2013 harvest. The rows of trees in culture were arranged in north-south direction, these trees are connected to each other in the direction of the row ( north-south), the canopy were divided into two sides , the east side ( sunrise side ) and the west side ( sunset side). The evaluations were performed fortnightly. During each assessment, 30 plants were used, chosen randomly within the plot. Each plant was divided into east and west sides, in addition to this division, the plant canopy was also divided into thirds. The assessed plants were marked for its not be used again in the experiment. In each of thirds on both sides of the plants were randomly collected five fruits, totaling thirty fruits per plant. Which was registered the number of ovipositions and feeds on fruits. To observe an oviposition, it was opened to determine whether the egg or larva was alive. In the evaluation period, we sampled 6,300 fruits, of which 50.65% had signs of oviposition. The period of feeding and oviposition occurred from December to March. Finding the beginning of this period can serve as a basis to take a decision during the monitoring of the culture, since the species ...