The influence of variety, fertilizer levels and water management on the stem borer incidence in summor rice revealed that neither fertility levels nor continuous standing water or alternate irrigation at 10 days interval had a profound influence on the dead heart (DH) incidence mainly due to low borer population in the early vegetative growth stage. The third dose of fertilizer applied at pre-booting stage of the crop had a distinct effect on the white earhead (WE). The N:P:K dose of 120:60:60 resulted significantly. higher (169%) WE as compared to the lower doses and/or no fertilizers. Both from the point of low infestation and higher yield N:P:K level of 90:45:45 was the best. Between the rice varieties, Jaya and Daya the latter one was more succeptible to the borers.
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Tamil Nadu, India.
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