Susceptibility assessment of watermelon and pumpkin cultivars to potyvirus in Tocantins


  • Marcio Akio Ootani Universidade Federal do Ceará
  • Raimundo Wagner de Souza Aguiar Universidade Federal do Tocantins
  • Gabriela Priscila de Sousa Maciel Universidade Federal do Ceara
  • Francisca Luana de Araújo Carvalho Universidade Estadual do Piaui
  • Larissa Alves Lopes Universidade Federal do Ceará
  • Marielle Peres Evangelista Universidade Federal do Tocantins



Citrullus lanatus, Cucurbita pepo, Viral diseases


Cucurbits cultivation has great importance in the food industry. However, in the main producing regions of curcubits, the increase of cultivation areas has been limited by viral infections. Among the most prevalent viruses there is the Watermelon Mosaic Virus (WMV), Papaya Ringspot Virus (PRSV-W) and Zucchini Yellow Mosaic Virus (ZYMV). The aim of this study was to evaluate the reaction of watermelon genotypes (Crimson sweet and Charleston Gray) and pumpkin (Jacarezinho and Caserta) to isolate watermelon strains in the following cities: Palmas (PYP-12), Gurupi (PYG-14 and PYG-19), Formoso do Araguaia (PYF-6), and Porto Nacional (PyPn-36 and PyPn-39). The experiment was performed in a greenhouse, in a completely randomized design, with 5 testing plants for each repetition to measure the response of these strains to cucurbit genotypes. The inoculated strains were obtained from leaves of watermelon cv Crinson sweet with symptoms The plants were rated by severity of viral symptoms in intervals of four days during 32 days. It was verified that the cucurbit genotypes showed different susceptibility to the viral strains. However, Caserta and Charleston gray were the ones which had greater sensitivity due to their high severity variation among the tested strains. Thus, it can be observed that the reaction among strains depends on the host and this reaction can be antagonistic or synergistic, depending on the mixed infection. Charleston gray watermelon was the most susceptible to most of the viral strains. Thus, this cultivar should be avoided in these regions.


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Author Biographies

Raimundo Wagner de Souza Aguiar, Universidade Federal do Tocantins

Professor Adjunto da Universidade Federal do Tocantins

Departamento de Biotecnologia

Gabriela Priscila de Sousa Maciel, Universidade Federal do Ceara

Graduanda em agronomia

Francisca Luana de Araújo Carvalho, Universidade Estadual do Piaui

Graduanda em zootenia



How to Cite

OOTANI, M.A., AGUIAR, R.W. de S., MACIEL, G.P. de S., CARVALHO, F.L. de A., LOPES, L.A. and EVANGELISTA, M.P., 2017. Susceptibility assessment of watermelon and pumpkin cultivars to potyvirus in Tocantins . Bioscience Journal [online], vol. 33, no. 6, pp. 1535–1543. [Accessed27 May 2024]. DOI 10.14393/BJ-v33n6a2017-37161. Available from:



Agricultural Sciences