साइट्रस नासूर

Class: जीवाणु
Common Name: साइट्रस नासूर
Scientific Name: Xanthomonas axonopodis pv. citri
Potential Host:


Who Am I?

Citrus canker is caused by a bacteria that penetrates citrus trees through stomata or wounded tissue.The disease favors high humidity that is combined with warm weather conditions. Citrus canker can spread by winds, rain or water splashes, and it can be transmitted mechanically through using contaminated tools.

Initial symptoms of citrus canker are small lesions on leaves that might resemble blisters. Later on, the blisters develop into brownish necrotic-like elevated corky lesions often surrounded by a yellow halo. On twigs, citrus canker appears corky, which is often surrounded by water-soaked margins. On fruits, citrus canker appears as brown scab-like or corky lesions and appear as elevated tissue.

Generally speaking, once a tree is infected with the bacteria, the tree begins to slowly decline towards the death. The fruits and foliage tend to drop prematurely and infected fruits that have canker signs are not marketable. Citrus canker has the ability to decimate entire orchards and poses a huge risk to the whole citrus industry.

Control Measures

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।

रोग प्रसार रोकने हेतु संक्रमित क्षेत्रों में उपकरण या श्रमिकों को एक कीटाणुशोधन प्रक्रिया से गुजरना चाहिये।

शारीरिक बाधाएं नासूर के प्रसार को, विशेषत: स्थानिक स्थितियों में, कम करने में सहायता कर सकती हैं, क्योंकि नए संक्रमणों का एक महत्वपूर्ण भाग वायु से उड़ाई गई वर्षा के कारण होता है।

कोई प्रभावशाली रसायन नियंत्रण नहीं है। अक्सर तांबा- आधारित उत्पादों के छिड़काव संप्रयोग फलों और पत्तों की सुरक्षा में सहायता करते हैं और रोग को दबाते हैं।

पत्ती सुरंगक का नियंत्रण अत्यावश्यक है क्योंकि सुरंगों के कारण पत्तों के टिशू को संक्रमण हो सकता है।

*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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