›› 2018, Vol. 61 ›› Issue (7): 877-884.doi: 10.16380/j.kcxb.2018.07.015

• 研究论文 • 上一篇    下一篇

大豆蚜虫龄鉴别特征

李慧1, 刘小侠1, 智海剑2, 李凯2, 张青文1, 李贞1,*   

  1. (1. 中国农业大学昆虫学系, 北京 100193; 2. 南京农业大学大豆研究所, 国家大豆改良中心, 南京 210095)
  • 出版日期:2018-07-20 发布日期:2018-07-20

Morphological characteristics for instar identification of Aphis glycines (Hemiptera: Aphididae)

LI Hui1, LIU Xiao-Xia1, ZHI Hai-Jian2, LI Kai2, ZHANG Qing-Wen1, LI Zhen1, *   

  1.  (1. Department of Entomology, China Agricultural University, Beijing 100193, China; 2. Soybean Research of Nanjing Agricultural University, National Center for Soybean Improvement, Nanjing 210095, China)
  • Online:2018-07-20 Published:2018-07-20

摘要: 【目的】明确大豆蚜Aphis glycines虫龄鉴别特征,达到准确快速识别的目的。【方法】在超景深显微镜观察的基础上,测定无翅与有翅型大豆蚜不同虫龄个体的体长、体宽、头壳宽、触角节数、触角长度、腹管长度、尾片长度和后足胫节长度8项指标。【结果】不同龄期大豆蚜形态特征存在差异,无翅型及有翅型个体的后足胫节长度在各龄期间均无重叠,无翅型个体的尾片长度及有翅型个体的体长、触角长度和尾片长度范围在各龄期间重叠程度较小,均可作为龄期鉴定的重要指标。此外,尾片形状可作为区分若蚜与成蚜的典型形态特征,触角节数可作为区分1龄、2龄若蚜与其他龄期蚜虫的形态特征。【结论】以无翅型个体后足胫节长度和尾片长度及有翅型个体后足胫节长度、体长、触角长度和尾片长度作为大豆蚜龄期鉴定的主要指标,配合触角节数、尾片形状、体宽、腹管长及翅基的发育程度,可准确鉴定不同翅型的各龄期大豆蚜。

关键词:  大豆蚜, 虫龄, 形态特征, 有翅型, 无翅型

Abstract:  【Aim】 This study aims to accurately determine the instars of the soybean aphid, Aphis glycines based on morphological characteristics. 【Methods】 Eight morphological indices of the wingless and winged A. glycines, including body length, body width, head width, the number of antennal segments, antenna length, cornicle length, cauda length and hind tibia length, were measured under the ultrawide area 3D microscope. 【Results】 The results indicated that the morphological characteristics are different among various instars of both wingless and winged A. glycines. The hind tibia length and cauda length of the wingless individuals and the hind tibia length, body length, antenna length, cauda length of the winged individuals displayed either no or low overlap between adjacent instars and thus could be regarded as remarkable criteria to identify instars of both morphs. Additionally, the cauda shape could be regarded as the representative morphological characteristics to differentiate the nymph and adult, and the number of antennal segments could be regarded as the morphological characteristics to differentiate the 1st instar nymph, 2nd instar nymph and the other instars. 【Conclusion】 The instars of A. glycine can be accurately and quickly identified according to the hind tibia length and cauda length of the wingless individuals and the comprehensive analysis about the hind tibia length, body length, antenna length and cauda length of the winged individuals. In addition, such morphological indices as the number of antennal segments, shape of cauda, body width, cornicle length and wing pad development facilitate the instar identification of this insect.

Key words: Aphis glycines, instar, morphological characteristics, winged morph, wingless morph