Screening of rice cultivars against Angoumois grain moth, Sitotroga cerealella (Olivier) (Lepidoptera, Gelechiidae)

Abstract

A study was conducted to screen twenty-five different rice cultivars against Angoumois grain moth, Sitotroga cerealella (Olivier) under laboratory conditions during 2020 - 2021 and 2021-2022 at Navsari Agricultural University, Navsari. From the pooled data of two year, it is observed that the cultivar IET-25470 recorded lowest number of adult emergence (72.83 adults) whereas the cultivar GNR -4 recorded highest number of adult emergence (119.33 adults) followed by the cultivar Ratnagiri-4 (110.50 adults). Regarding susceptibility index, the cultivar GNR 4 recorded highest susceptibility index (15.36) whereas cultivar IET- 25470, IET-25453, IET-24336, and IET-28713 recorded the lowest susceptibility index. The damage caused by S. cerealella to the grains of different rice cultivars revealed that the percentage of loss in grain weight was ranging between 4.08 to 8.19 per cent in different paddy cultivars. Further, Ratnagiri5 recorded the lowest weight loss (4.08%) while the maximum weight loss was recorded in GNR 4 (8.19%).