author(s)
K Sunisha and T Pandiarajan

abstract
This study aims to demonstrate the effectiveness of ozone as a fumigant in paddy. The efficacy of ozone against Rhyzopertha dominica adults in paddy grain was studied at different concentrations and moisture contents. The results indicated that exposure time of ozone required to achieve 100 per cent mortality of Rhyzopertha dominica adults in paddy grains at a moisture of 12.40% (w.b.) were 540, 360 and 270 min at 500, 1000 and 1500 ppm of ozone. Grains at moisture content of 14.20% treated under the same conditions required 610, 390 and 300 min to achieve complete mortality.