Abstract
In the present study, the effect of different types of soil, pH and phosphorus levels on root, shoot development and browning extent on shoot of wheat seedlings growth in soil inoculated withPythium graminicolum; was studied. Out of the four soil types the development of root and shoot was better in Domatta soil where as the disease development was more in black clay soil. The pH values below 5.5 and above 8.0 are favourable for the root and shoot development whereas these values are unfavourable for the development of the Pythium and consequently for infection by it. The percentage of browning of the collar region was more in soils near neutral (pH 6.5–7.1) and it was less in acidic (pH 5.0) or alkaline (pH 8.6) soils. The development of wheat roots and shoot in soil with 30 lb/acre phosphorus was good as compared to that in soil with P0, P15,45 and P60 lb/acre in inoculated soil. The percentage of extent of browning on collar region was less at 15 lb and 30 lb/acre P, due to less development of the disease.
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