›› 1999, Vol. 42 ›› Issue (-1): 125-129.

• RESEARCH PAPERS • Previous Articles     Next Articles

OCCURRENCE AND CONTROL OF RUSSIAN WHEAT APHID, DIURAPHIS NOXIA (MORDVILKO), IN TACHENG, CHINA

Wen Yong-lin, Wang Guo-ping, Yan Ping, Fu Zhen-sheng, Wei Zheng-ming   

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

Abstract: The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), distributed in five of the seven counties in Tacheng, Xinjiang Uygur Autonomous Region. The aphid could cause great damage to wheat in some areas in certain years. The economic thresholds (RWA infestation rate) ranged from 2.8% to 11.9% for winter wheat and from 1.0% to 6.2% for spring wheat depending on their growing stages and incidence of the aphid. In most years, the aphid was controlled under natural regulators, especially its natural enemies and no insecticide application was needed.

Key words: Russian wheat aphid, economic threshold, Tacheng, natural regulation