Abstract
Survey was carried out on the incidence of rice yellow stem borer Scirpophaga incertulas on two rice cultivars (Thanu and IT sanna) in two locations of Shivamogga district, i.e., Purle and Holehunnur areas during kharif 2016. Infestation in the form of dead hearts and white ear when analysed for seasonal variations, it was observed that dead hearts were maximum during the first week of August and white ears during the first week of September. Among the two locations, incidence was comparatively high in Purle area, and dead hearts and white ears were to an extent of 13.4 and 7.3% on Thanu cultivar; and it was 9.9 and 7.6% for IT (sanna) at the Holehunnur area, respectively.
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