Effect of epidemiological factors on the incidence of paddy blast (Pyricularia oryzae) disease
2011
Shafaullah (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology) | Khan, M.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology) | Khan, N.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology) | Mahmood, Y. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology)
The present study deals with the effect of epidemiological factors (temperature, relative humidity and rain fall) on the incidence and severity of paddy blast (Pyricularia oryzae), during the growing season 2008. The experiment was conducted at University of Agriculture Faisalabad. The temperature and incidence of paddy blast was negatively correlated i.e. -0.88, -0.80, -0.95, -0.84 respectively, this indicated that the disease incidence increases with the decrease of temperature. Humidity is positively correlated with Paddy blast i.e. 0.95, 0.90, 0.99, 0.89, 0.93 respectively that indicate increase in disease incidence as humidity increased. Rainfall was also positively correlated with incidence of disease i.e. 0.80, 0.90, 0.88, 0.93 and 0.84 respectively. However still more epidemiological studies are required to characterize the actual and critical factors to forecast and predict the blast disease of rice. This will help out to minimize the yield losses caused by paddy blast disease.
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