volume 65, issue 2, P183-189 2008
DOI: 10.1590/s0103-90162008000200012
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Abstract: ABSTRACT: A mild strain of Papaya ringspot virus -type W (PRSV-W), named PRSV-W-1, has proved to be very effective in the control of the disease in zucchini squash plants under greenhouse and field conditions. The aim of this work was to obtain additional information on the protection mechanism between PRSV-W-1 and a severe homologous strain (PRSV-W-C) in Cucurbita pepo L. cv. Caserta. Protective inoculation with the mild strain was made on the cotyledons and the challenge inoculation with the severe strain w…

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