The effects of different temperature on the respiratory metabolism of the 4^th instar larvae of Diaphania angustalis were studied.The insects were collected from Alstonia scholaris L.on the east campus of Guangxi University.The results showed that the CO2 release rate of the 4^th instar larvae of Diaphania angustalis changed obviously in different temperatures.The release rate of CO2 at 15 ℃ and 35 ℃ were significantly different from that at the other temperatures（P〈0.01）.In the range of 20 ℃ to 30 ℃,however,the CO2 release rates of the 4^th instar larvae of Diaphania angustalis changed within a small range,which were not significant（P〈0.01）.The sensitivity of respiration rate of insects to temperature was also calculated.Within 20 ℃ to 30 ℃,the value of Q（10） was minimum.It was concluded that the temperature range between 20 ℃ to 30 ℃ was the optimal condition for the growth and development of the 4-（th） instar larvae of Diaphania angustalis.