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Journal of Biological Sciences

Year: 2003  |  Volume: 3  |  Issue: 2  |  Page No.: 247 - 252

Relationship of Environmental Conditions Conducive for Potato Virus X (PVX) Disease Development on Six Varieties/advanced Lines of Potato

Naveed Qamar and M.A. Khan

Abstract

Six varieties/advance lines viz FSD-Red, Sante, Desiree, Kiran, Diamont and SH-5 were sown for the disease development of PVX and to study relationship with environmental conditions (Maximum and minimum temperature, relative humidity, wind velocity, clouds, pan evaporation and wind direction). Maximum PVX disease severity was recorded at 25-27°C maximum and 10-12°C minimum temperature. There was an increasing trend of disease development at 15-31°C maximum and at 5-13°C minimum temperature as explained by log regression models indicated by higher r values (0.82 and 0.99), 80-86 relative humidity with increasing trend with higher r values (0.99) and the highest PVX disease severity was recorded at 1.7-2.3 mm pan evaporation as explained by log regression models indicated by higher r values (0.98). None of the variety had significant correlation with clouds, wind velocity and wind direction.

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