Bioassay Studies on Carbon Dioxide and Oxygen Gas Concentrations against Rice Weevil Sitophilus oryzae (L.) in Storage Mekali Jayashree*, Pavithra S Department of Agricultural Entomology, University of Agricultural Sciences, Raichur-584 102, Karnataka, India *email: jayamekali@gmail.com
Online published on 13 January, 2016. Abstract The treatments included T1(95% CO2: 0%O2), T2 (90% CO2: 5%O2), T3(85% CO2: 10%O2), T4(80% CO2: 15%O2), T5(75% CO2: 20%O2), T6(70% CO2: 25% O2), keeping N2 gas as constant at five per cent in all the treatments and T7 untreated check. Results revealed that Cent per cent mortality of S. oryzae was recorded after exposure period of 6, 12, 24 and 36 hrs; with CO2 concentration of 85, 90, and 95 per cent LC50 of values for adults was 78.22, 73.82 and 71.22 per cent for an exposure period of 12, 24 and 36 hours respectively. Top Keywords LC50Lethal concentration, Modified atmosphere (MA), Rice weevil, Sitophilus oryzae, Sorghum, Storage. Top |