ocorrência de patógenos em cultivos de melancia e abóbora no sertão da paraíba
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Abstract
Por constituírem uma importante fonte de alimento, plantações de melancia e abóbora são comumente cultivadas no sertão paraibano, porém pouco se sabe sobre a ocorrência de patógenos causadores de doenças, os quais limitam a sua produtividade e renda aos produtores. Visando obter informações sobre a ocorrência dos patógenos virais e fúngicos em cultivos de abóbora e melancia situados em municípios produtores no sertão da Paraíba, amostras coletadas com sintomas de mosaico e deformação foliar, típicos de doenças virais foram analisadas pela técnica sorológica “enzime linked immuno sorbentassay” (Elisa) indireto para Papaya ring spot virus, type watermelon (PRSV-W), Watermelon mosaic virus (WMV), Zucchini yellow mosaic virus (ZYMV) e Cucumber mosaic virus (CMV). O teste de dupla difusão em Agar foi utilizado para verificar a presença de Squash mosaic virus (SqMV). Em contrapartida, amostras coletadas com sintomas de doenças fúngicas foram analisadas pelo isolamento do patógeno e visualização de suas características morfológicas em microscópio óptico. Em abóbora, houve prevalência dos vírus ZYMV e PRSV-W em infecções simples e mistas, e maior incidência dos fungos Cladosporium spp., e Alternaria spp. Em melancia detectou-se infecção simples e mistas das espécies PRSV-W, WMV e ZYMV, e maior freqüência de Fusarium spp. e Alternaria spp.. Não foram detectados os vírus CMV e SqMV. Os resultados obtidos revelam a ocorrência de vários patógenos fúngicos e viróticos em cultivos de abóbora e melancia situados no sertão da Paraíba e ressaltam a importância da utilização de estratégias de manejo que reduzem os danos ocasionados por esses patógenos.
Occurrence of pathogens in watermelon and pumpkin crops in the State of Paraiba
Abstract: By constitute an important food source, watermelon and pumpkin plantations are commonly grown on Paraíba backlands, but little is known about the occurrence of disease-causing pathogens, which limit their productivity and income to producers. With objective to get information about the viral and fungal pathogens occurrence in pumpkin and watermelon crops in producing counties located in the backlands of Paraiba, samples with symptoms of mosaic and leaf distortion, typical of viral etiology of disease were collected and analyzed by "Enzyme linked immune sorbentassay" (Elisa) Indirect for species Papaya ring spot virus, type watermelon (PRSV-W), Watermelon mosaic virus (WMV), Zucchini yellow mosaic virus ( ZYMV) and Cucumber mosaic virus (CMV). The double diffusion test in Agar was used to verify the presence of Squash mosaic virus (SqMV). In contrast, samples collected with fungal disease symptoms were analyzed based on the isolation of the pathogen and viewing their morphological characteristics under an optical microscope. In pumpkin, there was prevalence of ZYMV and PRSV-W in single and mixed infections, and higher incidence of Cladosporium spp. and Alternaria spp. On the other hand, in watermelon was detected single and mixed infections of PRSV-W, WMV and ZYMV species, and higher frequency of Fusarium spp. and Alternaria spp.. Were not detected the virus CMV and SqMV. The results show the occurrence of various fungal and viral pathogens in pumpkin and watermelon crops located in the backlands of Paraiba and emphasize the importance of using management strategies that reduce the damage caused by these pathogens.
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soares2016revistaocorrncia
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| Authors | ;M. G. F. O. Soares;J. A. Soares;M. A. Cezar;T. A. L. Cardoso;J. A. A. Lima |
| Journal | sensors |
| Year | 2016 |
| DOI |
10.18378/rvads.v11i1.3704
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