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THE CROP DISEASES OF SIKKIM
HIMALAYAS |
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CROP:
POTATO
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Scientific Name |
Solanum tuberosum |
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State/World wide |
World wide: South America; States: U.P, W.B, Bihar, H.P, T.N,
Punjab, Gujrat, Sikkim, Meghalaya, etc.
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Common Name of Disease:
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1. LATE BLIGHT |
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Local Name of Disease |
- Pilsiney
bimar |
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Causal Organism |
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Phytopthora
infestens |
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Distribution of Disease in Sikkim
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-Late blight is the most serious disease in potato in the
hills where the weather condition in comparatively more
congenial.
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Disease Incidence |
-Low to medium |
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Site of Infection |
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The pathogen attacks all parts of the plant
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Dissemination of the Disease |
- Tuber
borne disease when stored in low temperature. It is neither
seed nor soil borne. The pathogen take shelter in infected
potato tubers kept in cold storage remains dormant inside it
till next season.
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Symptoms
Symptoms appear on
leaves, stems, fruits, tubers.Irregular
black lesions appear near leaf margin.
On the lower surface of leaf, flour like
white zone is seen at the periphery of
lesion.On petiole or stem, purple or black
lesions appear.
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Favourable environmental condition for
disease
Phytopthora is a low temperature fungus- cool temperature
(5-12 degree centigrade) and muggy weather is most
favourable. Pathogen is susceptible to bright sun (>24
degree centigrade).
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Life cycle of Organism
Tuber borne disease when stored in cold
temperature.
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Life cycle of
Organism -
Pathogen is transmitted through planting of
infected tubers.
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Plant Protection
Measures
Grow
tolerant variety.
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| Bioinformatics Sub- DISC, SSCS&T |
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