›› 1999, Vol. 42 ›› Issue (-1): 35-39.

• RESEARCH PAPERS • Previous Articles     Next Articles

DEVELOPMENT, SURVIVAL AND REPRODUCTION OF THE RUSSIAN WHEAT APHID AT CONSTANT TEMPERATURES

Zhang Run-zhi, Liang Hong-bin, Zhang Jun, Qiu Zhuo   

  • Online:1999-12-20 Published:1999-12-20

Abstract: The Russian wheat aphid, Diuraphis noxia (Mordvilko), was reared at 9 constant temperatures from 4.5℃ to 33℃ respectively to examine effects of temperature on its development, survival and fecundity. The low temperature threshold for nymphal development was estimated to be 3.27℃, with an effective temperature accumulation of 152.55 day-degrees. The optimal temperatures for its development ranged from 15℃ to 20℃ and the high lethal temperature was 33℃. The aphid survival rates at 7.5℃, 10℃ and 15℃ were higher than that at other temperatures. Survival rates of the first and second instar nymphs were generally lower than that of latter instars. Adult aphids showed greater fecundity at temperatures from 15℃ to 24℃.

Key words: Russian wheat aphid (Diuraphis noxia (Mordvilko)), temperature, development, reproduction