The development of Schizaphis graminum (Rondani) was studied at various constant temperatures ranging from 15 to 32.5℃, with 65±5% RH, and a photoperiod of 16L:8D. Mortality of the 1<SUB>st</SUB>-2<SUB>nd</SUB> and the 3<SUB>rd</SUB>-4<SUB>th</SUB> stage nymphs were similar at most temperature ranges while at high temperature of 32.5℃, more 3<SUB>rd</SUB>-4<SUB>th</SUB> stage individuals died. The total developmental time ranged from 13.8 days at 15℃ to 4.9 days at 30.0℃ suggesting that the higher the temperature, the faster the development. However, at higher end temperature of 32.5℃ the development took 6.4 days. The lower developmental threshold temperature and effective accumulative temperatures for the total immature stage were 6.8℃ and 105.9 day-degrees, respectively and the nonlinear shape of temperature related development was well described by the modified Sharpe and DeMichele model. The normalized cumulative frequency distributions of developmental period for each life stage were fitted to the three-parameter Weibull function. The attendance of shortened developmental times was apparent with 1<SUB>st</SUB>-2<SUB>nd</SUB> nymph, 3<SUB>rd</SUB>-4<SUB>th</SUB> nymph, and total nymph stages in descending order. The coefficient of determination r² ranged between 0.80 and 0.87.

To construct a life table and development model Schizaphis graminum (Rondani), its adult longevity and fecundity were studied at various constant temperatures ranging from 15 to 32.5℃, with 65±5% RH, and a photoperiod of 16L:8D. Adult longevity of the greenbug gradually increased with decreasing temperature below 32.5℃. Total fecundity was not significantly different at all temperatures except at 32.5℃. Daily fecundity gradually increased from 25.0℃. It was 3.6 at 27.5℃ and as temperatures either went down or up, it decreased to 1.4 at 15.0℃ and 0.4 at 32.5℃. Net reproduction rate (Ro) was highest with 47.6 at 25.0℃. The intrinsic rate of increase per day (r<SUB>m</SUB>) and the finite rate of increase per day (λ) were highest with 0.4 and 1.5 at 30.0℃, respectively and the doubling time (Dt) was shortest with 0.98 at 32.5℃. The mean generation time (T) was 8.41 at 30.0℃.