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Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (5): 131-139.doi: 10.11707/j.1001-7488.20220514

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Investigation on Parasitic Natural Enemy Resources of Yponomeuta padella (Lepidoptera: Yponomeutidae) in Wild Fruit Forest of Western Tianshan Mountains, Xinjiang

Ouyan Xi,Dan Zhu,Wen Zhong,Chenri Wang,Hongying Hu*   

  1. College of Life Science and Technology, Xinjiang University Xinjiang Key Laboratory of Biological Resources and Genetic Engineering Urumqi 830046
  • Received:2021-02-09 Online:2022-05-25 Published:2022-08-19
  • Contact: Hongying Hu

Abstract:

Objective: Yponomeuta padella is a defoliator and one of the main pests in wild fruit forest of Western Tianshan Mountains in Yili Valley, Xinjiang. Investigation on its parasitic natural enemies could lay a foundation for the biological control of the pest. Method: The larvae and pupae of Y. padella were collected in the occurrence place during the field investigation from 2016 to 2017 and artificially reared in the laboratory, in which its life history and morphological characteristics were observed. The parasitic natural enemies of the pest were classified and identified, and the biological characteristics of dominant parasitoids were recorded. Result: 1) The life history of Y. padella was clarified, and five parasitic enemies of Y. padella, including four parasitic wasps and one parasitic fly, Tachinidae, were obtained. Among them Ageniaspis fuscicollis and Bessa parallela attacked its larval stage, Monodontomerus sp., Iseropus sp. and Aprostocetus sp. attacked the pupae. 2) Through the comparison of parasitism rate, A. fuscicollis was considered as the dominant parasitic natural enemy of Y. padella, with an average parasitism rate of 69.77%, and could be a potential biological control agent of this pest. The ratio of female to male was about 3.5∶1. The development process of A. fuscicollis was preliminarily clarified. 3) The parasitic wasp in the pupal stage of Y. padella was recorded for the first time. Conclusion: In this study, we have found out the parasitic natural enemy resources of the main apple pest, Y. padella, and determined the development period, parasitic rate and sex ratio of dominant parasitoid A. fuscicollis, and firstly recorded Aprostocetus sp., the pupal parasitic natural enemy of the pest. All the results will provide important references for the protection of the biodiversity of the natural enemies in wild fruit forest and for biological control of the pest by using native natural enemies.

Key words: Yponomeuta padella, Ageniaspis fuscicollis, Monodontomerus sp., parasitology, biological control

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