Diversity of Drosophila parasitoid wasps and population dynamics in summer in Zijin Mountain of Nanjing, China

LONG Shiying, XI Xinqiang, WANG Hua, LIU Tiantian, CHEN Huayan

Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2026, Vol. 50 ›› Issue (1) : 241-246.

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Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2026, Vol. 50 ›› Issue (1) : 241-246. DOI: 10.12302/j.issn.1000-2006.202403015

Diversity of Drosophila parasitoid wasps and population dynamics in summer in Zijin Mountain of Nanjing, China

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Abstract

【Objective】 This study aims to investigate the diversity and population dynamics of Drosophila parasitoids in summer in Zijin Mountain National Forest Park in Nanjing, and to improve our understanding of the maintenance mechanism of parasitoid diversity, to provide a reference for the biological control of Drosophila pests.【Method】Three plots on the southern, northern and eastern slope of Zijin Mountain were selected from August to October 2023, eleven sites were randomly selected in each plot to investigate the diversity of Drosophila parasitoids, bananas were used to attract Drosophila to lay eggs, then Drosophila parasitoids were trapped. The external morphological characteristics of Drosophila parasitoids were observed under a stereomicroscope and the species were identified.【Result】In total, we collected 732 Drosophila parasitoids, belonging to four families, four genera and four species, including Trichopria drosophilae, Pachycrepoideus vindemiae, Asobara leveri and Leptopilina sp. The four parasitoid species accounted for 36.07%, 34.56%, 21.45% and 7.92% of the total number of the collected parasitoids respectively. The highest number of individual Drosophila parasitoids were collected in the northern slope plot, with a total of 269. There were significant differences in individual numbers among the four species of Drosophila parasitoids and the Drosophila parasitoids population change significantly cross the season, numbers of T. drosophilae, P. vindemiae and Leptopilina sp. decreased significantly over time. In addition, Simpson, evenness and richness of Drosophila parasitoids in three investigated plots in Zijin Mountain decreased over time while there were no significant differences in the number and diversity indexes of Drosophila parasitoids among different plots. 【Conclusion】A total of four species of Drosophila parasitoids were captured in Zijin Mountain area in summer, pupal parasitoids, P. vindemiae and T. drosophilae are dominant Drosophila parasitoids in the investigation area. The species distribution of Drosophila parasitoids in all slopes showed no significant variation.

Key words

parasitoid / Drosophila / species diversity / Trichopria drosophilae / Pachycrepoideus vindemiae / Asobara leveri / Leptopilina / Zijin Mountain, Nanjing City

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LONG Shiying , XI Xinqiang , WANG Hua , et al . Diversity of Drosophila parasitoid wasps and population dynamics in summer in Zijin Mountain of Nanjing, China[J]. Journal of Nanjing Forestry University (Natural Sciences Edition). 2026, 50(1): 241-246 https://doi.org/10.12302/j.issn.1000-2006.202403015

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