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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2017年54 No.2

The emergence thythm and copulation behavior of Atrijuglans hetaohei Yang (Lepidoptera: Oecophoridae)
Author of the article:NAN Xiao-Ning1** WANG Ying-Hong2 ZHANG Li-Yuan1 TANG Guang-Hui1***
Author's Workplace:1. College of Forestry, Northwest A&F University, Yangling 712100, China; 2. Walnut Research Institution of Luonan County, Luonan 726100, China
Key Words:Atrijuglans hetaohei, emergence rthythm, courtship behavior, field observation
Abstract:

[Objectives]  Atrijuglans hetaohei Yang is a major pest of walnuts, seriously affecting both the yield and commercial value of walnut crops. This study aims to provide a reference for further research on the sex pheromones of A. hetaohei by determining adult emergence rhythm and copulation behavior of this species in field. [Methods]  Emergence rhythm, mating behavior and other reproductive activities of A. hetaohei were observed under field conditions. [Results]  Adult A. hetaohei took 45 to 60 minutes to emerge. Yearly emergence peaks of A. hetaohei populations occurred from the last ten days of May to the first ten days of June, and had an obvious diel rhythm; adult emergence peaking between 10:00 and 13:00 with 73.99% of adults emerging during this period. Though the final sex ratio of adults was nearly 1∶1, there were 8.67% more males than females at the beginning of eclosion. The emergence process was influenced by rainfall and low temperature. Generally, adults were relatively sedentary, but crawled and flew more frequently between 16:30 and 19:30. Females were observed engaging in courtship and mating behavior during this period. Female adults laid an average of 22.6 eggs which were dispersed rather than laid in a single location. [Conclusion]  This study provides preliminarily data on the eclosion and reproductive behavior of adult A. hetaohei under field conditions, detailing the time, state and environmental conditions when female adults engage in courtship and mating.

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