The population trend of C. medinalis larval and adult/moth were observed on the commercial rice cultivar ‘Kashmir Basmati-100’. The Larvae infestation was recorded as average number of larvae per 10 hills at weekly interval from its initial appearance at vegetative stage till the maturity of the crop in paddy field. During the month of August noticeable larval infestation was observed on plants. The number of larvae increases gradually and reached to its peak during the third and fourth week of September (last two weeks of September). After that the larval population started to decrease and disappeared in the beginning of November. The moth’s appearance was observed during the last week of July onward. The population of moths increases and reached to its peak during September (17-23). After that the moth’s population gradually started decreasing till and disappeared in the beginning of November.

Keywords: Rice Leaf Folder, Population trend, paddy field.