Virus de la papaye à anneaux (PRSV)

Class: Virus
Common Name: Virus de la papaye à anneaux (PRSV)
Potential Host:

Papaya and cucurbits

Who Am I?

Papaya ringspot is a viral disease in the genus Potyvirus. PRSV is transmitted by aphids. The virus is acquired and transmitted in a non-persistent manner by its vector in short periods of time that are measured in seconds to a minute.

The leaves develop a mosaic pattern and chlorosis that become malformed and can exhibit irregular, dark green blisters. Water-soaked, oily streaks appear on the petioles and upper part of the trunk. The symptoms include distorted and knobby fruits that can show color breaks. The fruit from infected trees will often develop ring spots, which is the reason behind the name of this disease. Severe symptoms often include a distortion of young leaves. Trees that have been infected at a young stage remain stunted and cease to produce economical yields.

Control Measures

Il n’y a pas de traitement contre les virus. Les plantes infectées ne peuvent être guéries; par conséquent, l’accent devrait être mis sur la prévention des épidémies de virus. Si seules quelques plantes sont infectées, elles doivent être retirées du champ.

Calendrier: Il est plus facile et plus rentable de surmonter les infestations au cours des premières étapes. Sur une base hebdomadaire, surveillez le terrain et recherchez les insectes porteurs de la maladie.

Assainissement: Gardez l’environnement proche des cultures en éliminant les mauvaises herbes, les débris de plantes, les parties endommagées, la croissance indésirable des plantes et les plantes à proximité qui ne sont ni cultivées ni protégées.

Grandir à l’intérieur des structures : Gardez la structure fermée et les filets exempts de trous.

Les produits utilisés dans une ou plusieurs régions du monde peuvent contenir les ingrédients suivants :

Flonicamid, pymétrozine, sulfoxaflore, imidaclopride, thiaméthoxame, acétamipride, bifenthrine, cyperméthrine, et chlorpyrifos.

azadirachtine, huile de neem, pyréthrines, et sel de potassium d’acides gras.

Caution and careful notice should be taken when using any plant protection products (insecticides, fungicides, and herbicides). It is the grower’s sole responsibility to keep track of the legal uses and permissions with respect to the laws in their country and destination markets. Always read the instructions written on labels, and in a case of contradiction, work in accordance to the product label. Keep in mind that information written on the label usually applies to local markets. Pest control products intended for organic farming are generally considered to be less effective in comparison to conventional products. When dealing with organic, biologic, and to some extent a small number of conventional chemical products, a complete eradication of a pest or disease will often require several iterations of a specific treatment or combination of treatments.

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