Vol. 10, Special Issue 12 (2021)

Author(s):
Kanchan Baghla, Balwant Singh Rathore, Sakshi Saxena and Jhabar Mal Tetarwal

Abstract:
The present study entitled ‘the effectiveness of inert dusts against lesser grain borer, R. dominica Fab.’ was conducted in the laboratory of Department of Entomology, College of Agriculture, Gwalior, Madhya Pradesh during the year 2019-2020.with a Number of 10 varieties. Seeds of 10 wheat varieties were collected from Department of Genetics and Plant Breeding, RVSKVV, Gwalior. Sound and healthy grains of each variety were stored in the same manner as those of stock culture grains were stored. The study is done by taking 100g of grains of each variety in plastic containers of 250g capacity for each replication to evaluate resistance/susceptibility against lesser grain borer. The observations were recorded at 30, 60, 90 and 120 days after storage to evaluate the per cent weight loss, per cent grain damage and progeny development (no. of adults emerged). The grain damage ranged from 0% to 8.18% in different inert dusts. There was no grain damage observed in the grains treated with silica 0.5 per cent and 1.0 per cent and rice husk ash 1 per cent. While, significantly maximum (8.18%) grain damage was observed in fly ash 0.5 per cent. While, weight loss ranged between 0% to 15.67% in wheat grains treated with different inert dusts. There was no weight loss observed in the grains treated with silica 0.5 per cent and 1.0 per cent and rice husk ash 1 per cent. Fly ash at 0.5 per cent (15.67%) was found least effective. The population build up ranged from 0 to 24.33 in different inert dusts. There was no population recorded in silica 1.0 per cent, 0.5 per cent 6.66 and rice husk ash at 1 per cent. While, significantly maximum (22.30) population was observed in grains treated with fly ash at 0.5 per cent.