Abstract: In order to clarify the relationship between the hatching process of Asiatic Migratory Locust and heat conditions in the grassland of northeast China, the influence of temperature and effective accumulated temperature on the overwintering hatching of Asiatic migratory locust was analyzed using an artificial climate box. The results show that the number of hoppers, the output rate of hoppers, the accumulated hoppers and the accumulated output rate of hoppers increase with the mean daily temperature rising. The locusts begin to sprout and hatch when the daily minimum temperature exceeds 25.0 ℃ for three consecutive days. It hatches rapidly when the daily minimum temperature is about 26.0 ℃, while the output rate of locust hoppers slow down when the daily minimum temperature is below 25.0 ℃. When the effective accumulated temperature higher  than 25 ℃ reaches 11.6 ℃•d and the active accumulated temperature is 211.6 ℃•d, the locust eggs begin to hatch. When the effective accumulated temperature increases to 20 ℃•d and the active accumulated temperature exceeds 320.0 ℃•d, the hatching speed slows down and reaches the second small peak of hatching immediately, then the hatching process is over.

Key words: Asiatic migratory locust, Artificial climate box, Hatching