Biology of rhizome fly, Mimegralla coeruleifrons under laboratory conditions at Kittur Rani Channamma College of Horticulture, Arabhavi over four generations revealed that the total life cycle to occupy 28.30 to 38.00 days with an incubation period of 11.0 to 21.0 days. The average fecundity was 83.80 to 110.60 eggs with a hatching percentage of 87.07 to 89.87 at a temperature range of 19.80 to 32.56° C and relative humidity of 60.33 to 78.56 per cent. Life fecundity tables developed for M. coeruleifrons indicated 27.54 days of mean length of generation (T₀) with an innate capacity to increase in number by 0.18 with a finite rate of increase 1.19 females per day and population multiplication of 3.40 times every week.