The threshold temperature and effective accumulated temperature of each stage of Euchorthippus cheui Hsia were investigated under five constant temperatures of 20, 24, 28, 32 and 36 ℃.The results showed that threshold and effective temperatures of egg, 1st instar nymph, 2nd instar nymph, 3rd instar nymph, 4th instar nymph, and adult was (7.01±3.25), (11.89±6.68), (11.05±4.65), (15.02±4.45), (17.05±2.19), (14.16±3.02)℃ and (295.01±44.67), (132.93±53.55), (122.99±32.72),(95.36±31.22), (94.90±17.41), (847.73±96.92)day degrees, respectively. |