Assessment of different rice varieties for resistance to granary weevil Sitophilus Granarium L. under laboratory conditions

The study was conducted to determine the population fluctuation of granary weevil, Sitophilus granarium on different rice varieties under laboratory conditions. The particular study was conducted in Department of Entomology, Faculty of Crop Protection Sindh Agriculture University Tando jam during 2016. The Ten different rice varieties i.e., T1 (Kainat Sela), T2 (Super Basmati), T3 (IRRI-6), T4 (IRRI White Pearl), T5 (Poona Basmati), T6 (Kernel Kainat Basmati), T7 (Punjab 86 Basmati), T8 (Kernel Super), T9 (Kernel Super Sela) and T10 (Sela 86 Tarazo) were tasted in the experiment. The observations were recorded at fortnight interval and the populations of alive S. granarium were counted. The results of the study revealed that the significant highest overall mean population of S. granarium was recorded in Super Basmati (28.43±15.3), however the lowest population was recorded in Sela 86 Tarazo (0.23±0.23). In accordance with the level of infestation, the highest percentage weight loss was recorded in Super basmati (3.74%) and the lowest weight loss was recorded in Sela 86 Tarazo (0.03%). The result would be useful for the IPM of storing the rice variety at different time interval.