The effect of different levels of potassium (0,50,100, 150 and 200 kg/ha) at each of the two nitrogen levels of 75 and 125 kg/ha and Sarocladium oryzae inoculation on growth and yield was studied in rice variety IR. 50. The disease incidence increased with increase in nitrogen level but decreased with increase in potassium application Grain and straw yields, tiller height, length of the panicle, and 1000 grain weight were found to increase with increase in application of potassium and nitrogen. Compared to the healthy plants the inoculated ones showed considerable reduction in height of the tillers, length of the panicle and 1000 grain weight. But the reduction was minimised with increased application of potassium at both the levels of nitrogen.
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