The Biological Characters of Sternoplax setosa setosa (Coleoptera:Tenebrionidae)
Zhang Jianying 1,Yu Youzhi 2,Zhang Fengju 3 (1.School of Agricultural , Ningxia University, Yinchuan 750021,China; 2.Educational Administration Office, Ningxia University, Yinchuan 750021,China; 3.Applied Research and Development Center for New Technology, Ningxia University, Yinchuan 750021,China)
Morphological characters, living habits and life cycle of Sternoplax setosa setosa are described In this paper. Sternoplax setosa setosa is one of dominant insect species of Tenebrionidae in Ningxia region. It is known that Sternoplax setosa setosa completes one generation in 2 years or 3 years in labosatory condition. This insect hibernates with adult and larva of different instars in soil and has generations overlapping. The egg appears from the early-April to mid-September, the egg stage is 12~15 days. In general, the larva has 6 or!8 instars, and the larva stage is during 1 or 2 years. Some of the exarate pupas pupate from the middle ten days of June to the middle ten days of August in next year, but some of the exarate pupas appear from the middle ten days of June to the middle ten days of August in the third year. The pre-pupa stage is during 6 to 8 days, and the pupa stage is during 10 to 13 days. The adult begins to mate and oviposit after developing to sex mature for 220 to 280 days.