Management of Pulse Beetle Callasobruchus analis (Fabricius) (Coleoptera: Bruchidae) Under Modified Atmospheric Condition on Stored Pigeonpea

Studies on the management of pulse bruchid, Callasobruchus analis (Fabricius) (Coleoptera: Bruchidae) undermodified atmospheric condition was undertaken at the College of Agriculture, Raichur, Karnataka during 2010–11. Change in gas concentration was measured and there was gradual depletion of O₂ and increase of CO₂. This was mainly due to respiration of insects and grains during storage. There was no change in O₂ and CO₂ gas concentration where there was no O₂ hence there was no scope for insects as well as grains for respiration. The CO₂ concentrations of 15 and 20 per cent exposed for 45 days gave cent per cent mortality of insects; no adults survived at that concentration. Further, there was no adult emergence thereby egg laying and mass loss (%) were also nil.