MANCHA ANULAR DE LA PAPAYA PDF
Manejo de epifitias del Virus de la mancha anular de la papaya utilizando barreras de Zea mays L. en Carica papaya L. . Cabrera, D., Universidad Central. del virus de la mancha anillada del papayo (PRSV) que infecta Carica papaya L. en El virus de la mancha anular de la papaya (Papaya Ringspot Potyvirus. Epiphyte management of Papaya ringspot virus using Zea mays L. barriers in Carica papaya L. Rev. Protección Veg. [online]. , vol, n.2, pp.
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Viral diseases represent a major phytosanitary problem, especially those transmitted by insect vectors, such as the Papaya ringspot virus Mncha Potyviridae, Potyviruswhich are considered the most manncha important viral disease affecting papaya due to its geographical distribution in almost all papaya producing regions as well as its high virulence and high yield losses Cabrera, Inhibitovir is a commercial product with viricidal action produced by Proveedora Fitozoosanitaria S.
The virus is transmitted by many species of aphids in a non-persistent manner Suzuki et al. Differential protection against papaya ringspot virus isolates in coat protein gene transgenic papaya and classically cross-protected papaya.
Phylogeography and molecular epidemiology of Papaya ringspot virus.
Broad-spectrum resistance to different geographic strains of Papaya ringspot virus in coat protein gene transgenic papaya. Variability and genetic structure of the population manchw watermelon mosaic virus infecting melon in Spain.
Assessment of Cuban papaya (Carica papaya L.) accessions against ringspot
Isolates of PRSV-W do infect cucurbits such as watermelon, cucumber, and squash and were originally known as Watermelon mosaic virus 1. The virus disease incidence was determined by calculating the symptomatic plants from the total plants sampled each manchaa. Papaya seedlings were planted in east to west double rows spaced at 3. It is composed of an analogue base 1.
In PRSV was found in home gardens but efforts were taken to prevent its spread. Knowledge of the nucleotide sequence and genetic diversity is necessary anu,ar be able to create control strategies. PRSV has flexible, x 12 nm filamentous, flexuous rod particles and consists of a monopartite single-stranded positive sense RNA, about 10, nucleotides long, excluding a poly-A tract found at its 3’end.
Manfha este momento, las accesiones de Tallo morado de Nava y Amarilla de Nava mostraron los mayores de 0.
Similar results with formulations containing ribavirin have been reported in virus control, by inhibiting the viral messenger RNA guanylation process that stimulates the natural defenses of plants Jean-Claude et al, Generation of transgenic watermelon resistant to Zucchini yellow mosaic virus and Papaya ringspot virus type W.
The applications of both antiviral products were able to attenuate the severity produced by the PRSV up to d Figure 1. Given ls there is not any information on PRSV in the department of Norte de Santander, Colombia, this study was conducted for a preliminary determination of their genetic variability, based on the sequence of the CP gene, using sequences of macha PRSV isolates collected from symptomatic papaya plantsin two different locations in the department.
The biweekly treatments with Inhibitovir and Q VI dde yields between 1. Plant DiseaseSt. The presence of recombinations in PRSV provides an understanding of its molecular evolution and help in the study of the characteristics such as the specificity of the host, geographical distribution and emergence as new epidemics Mangrauthia et al.
For this inoculation, diseased leaves were macerated in a solution containing a 0. The presence of both inclusions can be diagnostic for this virus. The increase in symptom intensity was different for the plant organs in the following order: The effect of the PRSV can be evident, by oily spots on the stems, even before producing fruit rings and anylar an inclination of the petioles towards the soil that may reduce the photosynthetic activity of the leaves Figure 2a.
Treatments II and IV and preventive controls, were applied every 15 d, among the first and pwpaya mo of transplantation.
Papaya ringspot virus
Methods of threating viral infections of selected trees and field crop using ribavirin. A limiting factor for papaya yield worldwide is the disease caused by PRSV. De Boer, and H. The university was highly motivated to help save the Hawaiian papaya industry, and consequently took a leading role in pushing for commercialization of the fruit. The PRSV produced a reduction in the number of fruits in the untreated plants, while in the plants treated with Q VI and Inhibitovir, similar amounts of fruits were obtained without significant differences among them but with significant difference from the control performance Figure 3.
Oily or water-soaked spots and streaks appear on the trunk and petioles.
Two plants were selected for each plot, and the following measurements were made: For fruits, the intensity of the observed symptoms was inferior to 2. There is a known resistance to PRSV, although certain varieties are more symptomatic than others. Assessment of Cuban papaya Carica papaya L.
Materials and methods Field sampling. Percentage of virus incidence The naular disease incidence was determined by calculating the symptomatic plants from the total plants sampled each treatment. Yields were evaluated at 9 mo after transplanting.