Viral Etiology of Diseases Detected in Melon in Guatemala

Plant Disease
C JordáJ Tello

Abstract

At the beginning of 1999, 30 melon (Cucumis melo L.) plots on several farms (1,500 ha) in the Zacapa Valley of Guatemala were visited, and melon plants with two different symptomologies were observed. One group of plants exhibited stem necrosis at the crown level, and less frequently, small necrotic spots on leaves. Some plants exhibited necrosis of veins and yellow areas that evolved into interveinal necrosis and often expanded into large necrotic interveinal lesions. Roots were poor and lacked secondary rootlets. In some cases, wilt and plant death were detected. Affected plants appeared as localized patches in various areas of the plots on farms that were visited. Double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) serological analyses were carried out with 34 symptomatic plants. In these plants, a mixture of the crown and root were analyzed with two repetitions and two lots of different Melon necrotic spot virus (MNSV) polyclonal antisera (Loewe No. 07097 and Sanofi No. 70217). All 34 plants were positive for this virus. These results were confirmed using reverse transcription-polymerase chain reaction (RT-PCR) with specific MNSV primers (1). Spores of Olpidium bornovanus, the vector of MNSV, were seen on...Continue Reading

Citations

Nov 11, 2008·Microbial Ecology·M Díaz-PérezJ C Tello-Marquina
Feb 1, 2010·Plant Disease·M E StanghelliniI J Misaghi

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