Abstract: Development, survivorship and fecundity of the experimental populations of Microterys ericeri Ishii were observed at 15℃, 18℃, 21℃, 24℃, 27℃ and 30℃ respectively and their life tables at these temperatures were presented. The thermal threshold and thermal sum for development of M. ericeri were estimated at 12.1℃ and 499.4 day-degrees respectively. The shortest durations were recorded at 27℃ as follows: egg, 3.0 d; the 1st-2nd instar larva, 5.4 d; the 3rd instar larva, 3.2 d; the 4th instar larva, 3.5 d; the 5th instar larva, 4.1 d; pupa, 8.3 d; and the whole generation, 27.5 d. The highest survival rates of the 3rd, 4th and 5th instar larvae and pupae occurred at 24℃ while the maximal fecundity was observed at 27℃. The generation survival rates were 8.5%, 25.2%, 50.3%, 68.2%, 49.8% and 38.1% at 15℃, 18℃, 21℃, 24℃, 27℃ and 30℃ respectively. The maximums of the generation survival rate, population trend index, net reproduction rate and innate capacity of natural increase occurred at 24℃. The parasitic wasp failed to complete its life cycle at 15℃.

Key words: Microterys ericeri, temperature, experimental population, life table, population parameters