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Question
Observe the figure and answer the questions that follows.
- Write the name of the disease.
- Name the causative agent of this disease?
- How does the disease spread from one plant to another?
- Name any two plant diseases and the microbes that cause them.
Answer in Brief
Solution
- The disease is yellow vein mosaic of the lady’s finger/okra. The disease is characterised by alternating green and yellow patches and chlorosis in veins. Severity of disease leads to complete yellowing of leaves.
- Bhindi yellow vein mosaic virus.
- The disease transmission occurs via the insects sitting on another of diseased plant and moving to others,
- Plant disease occurring commonly are :
- Common rust Puccinia graminis (fungus) brown pustules which can be elongated or ovule develops on both the leaf surfaces. On rupturing they release spores.
- Citrus canker Xanthomonas spp (bacteria) lesions on leaves, stems and fruits of citrus trees which fruit and leaves drops prematurely from trees.
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