पपीता रिंगस्पॉट विषाणु (PRSV)

Class: वायरस
Common Name: पपीता रिंगस्पॉट विषाणु (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

विषाणुओं का कोई उपचार नहीं है। संक्रमित पौधो का उपचरर नहीं किया जा सकता हैं, अत: विषाणु-प्रकोपों को रोकने पर ध्यान देना चाहिये। यदि केवल कुछ पोधे ही संक्रमित होते हैं तो उन पोधों को खेत में से हटा देना चाहिये।

आरंभिक अवस्थाओं में संक्रमण से बचना अधिक सरल और किफ़ायती होता है। खेत की साप्ताहिक तौर पर देख-रेख करें और रोग फैलाने वाले किटाणुओं की खोज करें।

स्वच्छता : खरपतवारों, पौधे के अवशेषों, क्षतिग्रस्त भागों, अवांछित पौधों की वृद्धि, और आस-पास के खेती न किये गये क्षेत्रो और असुरक्षित पोधों को हटा कर आस-पास के क्षेत्र साफ रखें।

अंदरूनी ढांचे बढ़ाएं : ढांचे को बंद और जालियों को छिद्र-मुक्त रखें।

विश्व के एक अथवा अधिक भागों में प्रयोग किये जाने वाले उत्पादों में निम्न सामग्रियाँ हो सकती हैं :

फ़्लोनिकामिड्, पाइमेट्रोज़िन, सल्फ़ोक्साफ्लोर, इमिदाक्लोप्रिद, थियमेतोक्साम्, एसेतमिप्रिड्, बिफ़ेन्त्रिन्, साइपेर्मेत्रिन्, और च्लोर्प्य्रिफ़ोस्

अज़ादिराच्तिन, नीम तेल, पाइरिथ्रिन्स, और फैटी एसिड के पोटैशियम लवण

*Names marked in red are considered to be highly poisonous to beneficial insects.

*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.

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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