抄録
The effect of temperature on the oviposition and development of the two Haemaphysalis species, H. longicornis and H. flava was observed under laboratory conditions. The mean number of the deposited eggs per mg body weight of H. longicornis female increased at a high temperature of 30℃, while it decreased at 30℃ in H. flava. The egg hatchability of H. longicornis was high at all temperatures from 15 to 30℃, but that of H. flava was reduced at 30℃. The survival rates during the larval and nymphal post-parasitic period of both species were not significantly different at all temperatures from 15 to 30℃. The pre-oviposition period was short at 30℃ in H. longicornis, but very long in H. flava. The incubation period of eggs became shorter with increasing temperature in H. longicornis, but in H. flava it was longer at 30℃ than at 27℃. The larval and nymphal post-parasitic periods of both species were short at higher temperatures. In H. flava, the larval post-parasitic period was shorter at high temperatures, but the nymphal post-parasitic period was longer at all temperatures, than in H. longicornis. In both species, the developmental zeros for each developmental stage were calculated from the regression equations between developmental velocity and temperature. The total effective temperatures from egg to adult excluding pre-parasitic and parasitic periods in each stage were 820.0 and 961.5 day-degrees for H. longicornis and H. flava, respectively.
