Análise do arranjo espacial e determinação da estrutura de focos da resinose coqueiro (Cocos nucifera L.) na região de Neópolis, Sergipe

• Autor(a) principal: Medeiros, Rangel Dórea de
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/6552
• topic: Ceratocystis paradoxa; Cocos nucifera L.; Epidemiologia; Ceratocystis paradoxa; Cocos nucifera L.; Epidemiology; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA

The coconut palm (Cocos nucifera L.) is the most palmae cultivated throughout the world. The stem bleeding, caused by the fungus Ceratocystis paradoxa (De Seynes) Moreau, has caused significant losses in production in several states of Brazil, including Sergipe. Etiology and transmission mechanisms are largely unknown and epidemiological studies have not yet been realized. This study aimed to analyze the spatial arrangement of disease in the field, in order to characterize the spread of stem bleeding, besides the use of the technique for analyzing the structure of foci for characterization. The spatial pattern of disease was investigated in three planting areas, each containing 1500 plants / area, divided into quadrats of 15 plants, using the mapping analysis, ordinary runs, a slight adjustment to the distribution of frequency and spatial autocorrrelation. In all areas it was evident the presence of aggregation of diseased plants, indicating a predominant pattern of spatial arrangement of disease in the field. In analyzing the structure of foci, it was found a total of 13 foci, with an average of 27.5 plants / focus and tendency (higher number of symptomatic plants) to grow in the direction of the lines of plantation, with provision so elliptical. From the data analysis, there were indications that possibly the stem bleeding route of transmission has the natural dispersal of inoculum and cultural practices. Are required to carry out additional studies on the dispersal of inoculum for a better understanding of disease dynamics and the establishment of appropriate control measures.