கசவா தேமல் வைரஸ்

Class: வைரஸ்கள்
Common Name: கசவா தேமல் வைரஸ்
Potential Host:

Cassava (synonyms: yucca, manioc, and mandioca)

Symptoms:

The key infection period for the virus begins 2-3 weeks after planting crops and the formation of new leaves have emerged. The symptoms appear 3-5 weeks after the plant is infected.

The symptoms appear as a mosaic pattern and discolored of leaves. Plant stunting, mottling, misshaped and twisted leaflets, and a reduction in the size of plants and roots also occurs.

Who Am I?

Cassava mosaic virus is one of the most economically important threats to cassava-growing regions. Over the years, several different species of viruses have been identified and shown to possess the ability infecting cassava in various countries, such as India, Africa, and South America.

Cassava mosaic virus is a member of the geminiviruses family and is transmitted in a persistent manner; whitefly adults feed on infected plants for more than a couple of minutes, sometimes hours. After the uptake, the virus has to circulate in the adult whitefly before it can infect healthy plants. In other words, the virus is acquired and transmitted by its vector in long periods of time that are measured in hours. Other than adult whiteflies, the spread occurs due to contaminated planting materials and occasionally by mechanical means.

Whiteflies are attracted to new foliage and colonize them quickly. A single whitefly contracted with the virus only needs about 10 minutes of feeding time to infect young leaves. When multiple infected whiteflies feed on a plant, the chances of the plant acquiring the disease are significantly higher.

Control Measures

நோய்க்குத் தடுப்பாற்றலைக் கொண்ட தாவர வகைகள் மற்றும் விதைகளைப் பயன்படுத்துங்கள்.

துப்புரவு: களைச்செடிகள், தாவரக் குப்பைகள், சேதமடைந்த பாகங்கள், தேவையற்ற தாவர வளர்ச்சி மற்றும் சாகுபடி செய்யப்படாத மற்றும் பாதுகாக்கப்படாத அருகிலுள்ள தாவரங்களை அகற்றுவதன் மூலம் பயிர்களுக்கு அருகாமையில் உள்ள பகுதிகளைச் சுத்தமாக வைத்துக்கொள்ளுங்கள்.

வெள்ளை ஈக்களின் பெருக்கத்திற்கான பொதுவான கட்டுப்பாடானது சைப்பர்மெத்ரின், டெல்டாமெட்ரின், பைஃபெந்த்ரின், டையாஃபெந்தியுரான், தியாமெத்தோக்ஸாம், இமிடாக்ளோப்ரிட், அசெட்டமிப்ரிட், புப்ரோஃபெசின், ஸ்பைரோமெஸிஃபென், சயன்ட்ரானிலிப்ரோல், ஸ்பைரோடெட்ராமேட், மற்றும் செயற்கை டெர்பென்ஸ் செனோபோடியத்தின் சாரம் போன்ற பூச்சிக்கொல்லிகளின் அடிக்கடி பயன்பாடுகளைக் கொண்டிருக்கிறது.

*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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