中国林学（英文版）2008，Vol.10Issue(2)：125-129,5.
Effective accumulated temperature and developmental threshold temperature for Semanotus bifasciatus (Motschulsky) in Beijing
Effective accumulated temperature and developmental threshold temperature for Semanotus bifasciatus (Motschulsky) in Beijing
摘要
Abstract
In order to understand the occurrence and development of Semanotus bifasciatus (Motschulsky), a borer insect of Platycladus orientalis in parts of northern and eastern China and to improve its prediction, the developmental threshold temperature (Ct) and effective accumulated temperature (K) of S. Bifasciatus were determined under conditions of constant and variable temperatures. The results show that under constant temperatures the value of Ct has a range of 8.90±1.77℃ and the value of K lies between 95.19±13.14 degree-day for eggs; the values for larvae are Ct = 13.26±3.06℃ and the number of degree-day is K = 2,885.07±187.87 degree-day; for pupae the ranges are Ct= 8.93±2.49℃ and K= 131.20±25.63 degree-day. Under the condition of ambient temperatures, the values for eggs are Ct= 17.33±1.24℃ and K= 70.79±8.99 degree-day. It is suggested that S. Bifasciatus adults over-winter in a state of dormancy, not at a diapause. Warm winter may accelerate the life cycle of S. Bifasciatus. Equations can be used to predict an early occurrence ofS. Bifasciatus.关键词
Semanotus bifasciatus (Motschulsky), developmental threshold temperature, effective accumulated temperature, eggs, larvae, pupaeKey words
Semanotus bifasciatus (Motschulsky), developmental threshold temperature, effective accumulated temperature, eggs, larvae, pupae分类
农业科技引用本文复制引用
MA Li-qin,GAO Shi-ji,WEN Jun-bao,ZONG Shi-xiang,XU Zhi-chun..Effective accumulated temperature and developmental threshold temperature for Semanotus bifasciatus (Motschulsky) in Beijing[J].中国林学（英文版）,2008,10(2):125-129,5.基金项目
This study was funded by the Beijing Science and Technology Planning Project (D0705002040291), the Program for Changjiang Scholars and Innovative Research Team at Universities (IRT0607) and the Beijing Education Committee Planning Project (JD100220648). （D0705002040291）
