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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2019年56 No.2

Morphological criteria for sexing different developmental stages of the Codling moth, Cydia pomonella (L.)
Author of the article:FENG Li-Kai1** LIU Zheng1 LI Guo-Fu2 CHEN Liu-Sheng3*** LIN Ke-Jian1, 4***
Author's Workplace:1. Institute of Plant Protection, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, China; 2. Agricultural Technology Service Center of Seventh Division 130th Regiment of Xinjiang Production and Construction Crops, Kuitun 834034, China; 3. College of Agriculture, Shihezi University, Shihezi 832003, China; 4. State Key Laboratory of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Science, Beijing 100193, China
Key Words:Cydia pomonella (L.); morphological; sex; character
Abstract: 

[Objectives]  To develop a fast, accurate method for sexing the mature larvae, pupae and adults, of the Codling moth, Cydia pomonella (L.). [Methods]  Sexually dimorphic features of mature C. pomonella larvae, pupae and adults were photographed and measured under a microscope. [Results]  A distinguishing feature of mature male larvae was the obvious renal spots on the dorsum of the 5th abdominal segment, which are absent in female larvae. Distinguishing features of male pupae include 4 distinct somatic lines behind the wing tip, and a longitudinal crack in the center of the ventral surface of the 9th abdominal segment with half round knobs on either side. Female pupae can be distinguished by 3 distinct somatic lines behind the wing tip and a lengthways crack in the front edge of the abdomen on the 8th abdominal segment that connects to the abdominal line to form a "Y" shape. The sides of female pupae are also flat without protuberances. A distinguishing feature of adult males is a dark brown streak on the posterior edge of the ventral surface anterior of the ventral mid-chamber which is absent in females. The male abdomen is also long and narrow, and the valvae are often open, like a pair of pliers. In contrast, the female has a cylindrical abdomen with a tapered end. [Conclusion]  Sexually dimorphic features of mature larvae, pupae and adults of C. pomonella allow these developmental stages to be rapidly, and reliably, sexed.

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