The effective accumulated temperature of Ips typographus
Author of the article:TONG Xue1 , YANG Bin2 , WANG Zhi - Ming1**
Author's Workplace：1.College of Agronomy , Jilin Agricultural University , Changchun 130118, China; 2.Foresty Pest Control and Quarantine Station of Yanbian Korean Autonomous Pref ecture, Jilin Province Yanbian 133001, China
Key Words：Ips typogr aphus , biology, effective accumulated temperature, threshold temperature
Abstract：The effective accumulated temperature and threshold temperature of bark beetle, lps typ ographus , were determined from adult boring through the bark to the new first adult emergence. The effective accumulated temperature was ( 195.4±10) degree- day, and the threshold temperature was ( 18.3±0.2)℃ .