टमाटर का जीवाण्विक नासूर

Class: जीवाणु
Common Name: टमाटर का जीवाण्विक नासूर
Scientific Name: Clavibacter michiganensis
Potential Host:

Tomatoes, potatoes, eggplants, and peppers

Who Am I?

Bacterial canker of tomato is an economically important disease found throughout the world. It’s main host is tomato, but it can infect a few other crops. Outbreaks can cause tomato plants significant damage.

Bacterial canker enters the host plant mainly through hydathodes, stomates, and wounded tissue. After entering, the pathogen can become systemic and move through the xylem tissue.

Once bacterial canker is established on plants in the field, it can easily spread from plant-to-plant by water splashing and contaminated tools on workers clothes and hands. The disease favors relatively high temperatures (24-29 degrees Celsius) and a high relative humidity (80% and above).

Bacterial canker symptoms usually manifest on lower foliage first and include: curling and wilting of leaves and branches. Chlorosis, brown necrosis, and the shriveling of leaf tissue are also common and may develop only on one side of the leaf. With time, vascular tissue turns tan in color and eventually red-brown.

Observing fruit symptoms is useful in diagnosing bacterial canker. Small, round white to yellow spots with brown centers may develop on green fruits.

In advanced stages, pith separates from the vascular tissue along the stem, and as a result, hollowing of the stem occurs.

Control Measures

समय-निर्धारण : आरंभिक अवस्थाओं में संक्रमण से बचना अधिक सरल और किफ़ायती होता है खेत की नियमित रूप से देख-रेख करें और उपरोक्त चिन्हों को खोजें।

उच्च गुणवत्ता वाले पौधे लगाने व रोग-मुक्त बीज की सदैव अनुशंसा की जाती है।

रोग प्रतिरोधक पौधों की भिन्न प्रकारों और बीजों का प्रयोग करें।.

संक्रमित गीले पौधों को न छूयें। पत्तियों के पूरी तरह सूखने तक खेत में निर्धारित अभ्यास स्थगित कर दें।.

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

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।

*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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