| Abstrakt: |
The study of the impact of age of rice popular cultivars on the incidences of Nymphula depunctalis (Guenee) in Cauvery command area was conducted at College of Agriculture, V. C. Farm, Mandya, Karnataka, India during Summer of 2021 by using 10 popular rice cultivars, such as Jaya, Jyothi, BR-2655, Thanu, MTU 1001, MTU1010, IR-64, Rajamudi, Gangavati Sona, and KRH-4. The percent leaf damage by N. depunctalis started at 20 days after planting and gradually increased with increasing rate of leaf damage in all the popular cultivars. Whereas peak leaf damage was noticed when the crop was between 30 to 40 days old, later it gradually disappeared, when the crop became older. Live cases were also recorded, and it started appearing within 20 days after transplanting (DAT) and it reached maximum, when the crop was at 40 DAT and in subsequent observations gradually disappeared. However, both the percent leaf damage and live cases due to paddy caseworm drastically decreased in all the popular cultivars, with an increase in the age of the crop. So, it clearly indicated that early age plants were more susceptible to paddy caseworm larvae. And it helps to explore IMP strategies in the early stage of crop. [ABSTRACT FROM AUTHOR] |
