Vol. 10, Issue 9 (2021)

Author(s):
Ajay Khatavkar, Sanjeev Bantewad and Milind Sonkamble

Abstract:
The present laboratory study was conducted to screen the different eight sorghum genotypes against rice weevil, Sitophilus oryzae (L.) for their resistance / susceptibility during 2020-21 at Dept. of Agril. Entomology, College of Agriculture, Parbhani. Among the eight genotypes some genotypes were slightly smooth, shiny, attractive, wrinkled and rough. Seed colors were pearly white, yellowish white to pale yellow and small, medium to bold size of seed. In different genotypes significantly lowest numbers of eggs (10 eggs/100 seeds) were laid on genotype Dagdi followed by M 45 (16.00 eggs/ 100 seeds) which was at par with PBN-Shakti (16 eggs/100 seeds) and PBN-Jyoti (18 eggs/100 seeds). In respect of adult emergence lowest per cent adult emergence was recorded in Dagdi (10 per cent) which was found significantly superior over other genotypes followed by PBN-Shakti (12.50 per cent) and M-45 (12.50 per cent) and developmental period range of 27.41 days on PBN-Super moti to 35.14 days on Dagdi. The range of seed infestation of sorghum genotypes was from Dagdi (8.20 per cent) to PBN-Supermoti (30.80 per cent) due to rice weevil. The genotype Dagdi followed by M 45 and Parbhani shakti was found tolerance genotype on the basis of damage, oviposition preference, and weight loss. This information is useful to improve grain protection in storage and varietal improvement and release programme.