Characterization of larval instars of artemisia weevil,Adosomus sp.

作     者：WANG Jian-wei LUO You-qing ZONG Shi-xiang GAO Bi-qiang LI Yue-hua 

作者机构：Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing 100083 E R.China Forest Pest Control and Quarantine Station of Yanchi County Ningxia Province Yanchi 751500 P. R. China 

出 版 物：《Forestry Studies in China》 (中国林学（英文版）)

年 卷 期：2009年第11卷第1期

页      面：20-23页

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 0829[工学-林业工程] 09[农学] 0904[农学-植物保护] 0901[农学-作物学] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 0713[理学-生态学] 

基　　金：supported by the National Project of Science Technology for the 11th Five-Year Plan in China (Grant No. 2006BADO8A12) 

主　　题：Adosomus sp. larval instars head capsule Dyar's law regression equation 

摘      要：The artemisia weevil, Adosomus sp., has become an important wormwood （Artemisa ordosoca and A. sphaerocephala） pest in recent years in Ningxia Province, China. The number of larval instars should be determined before further studies on its life history, biology and integrate management of pest （IMP）. In this study, we measured the length and width of head capsule, based on frequency histograms and Dyar＇s law, from which we concluded that the larvae ofAdosomus sp. have four instars. Of the two variables measured, the width of head capsule provided the best division of instars. The average width of head capsule of the 1st instar larvae was 1.348±0.152 mm, the 2nd 2.109±0.199 mm, the 3rd 3.563±0.492 mm and the 4th 5.974±0.581 mm.