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Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (5): 140-150.doi: 10.11707/j.1001-7488.20210513

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The First Discovery and Infective Characteristics of A Major Invasive Pest Hylurgus ligniperda (Coleoptera: Scolytidae) in China

Lili Ren1,Jing Tao1,Haiwei Wu2,Shixiang Zong1,Chuanzhen Wang3,De Hua4,Juan Shi1,Yizhou Liu1,Youqing Luo1,*   

  1. 1. Beijing Key Laboratory for Forest Pest Control, Beijing Forestry University Beijing 100083
    2. Shandong Academy of Forestry Jinan 250014
    3. Yantai Service Center of Forest Resources Monitoring and Protection, Shandong Province Yantai 264003
    4. Muping Bureau of Natural Resources of Yantai, Shandong Province Yantai 264100
  • Received:2021-03-19 Online:2021-05-25 Published:2021-07-09
  • Contact: Youqing Luo

Abstract:

Objective: This study aims to clarify the invasion, colonization, and severe damage of the major international forest quarantine pest Hylurgus ligniperda in China. The morphological characteristics, molecular identification, and damage characteristics were studied, so as to provide a theoretical basis for the monitoring and control of this pest. Method: The morphological characteristics of the larvae, pupae, and adults H. ligniperda collected from the roots of Pinus thunbergii in Muping District, Yantai City, Shandong Province were observed, photographed, and compared. The genomic DNA was extracted, and the sequences of the large ribosomal subunit 28S and mitochondrial cytochrome oxidase subunit Ⅰ(COⅠ) were amplified and sequenced using general primers of the subfamily. The sequences were compared with the existing sequences in the NCBI database. The damage characteristics of H. ligniperda were preliminarily investigated. Result: The morphological characteristics of the adults were completely consistent with the description of H. ligniperda. The phylogenetic tree (ML tree) based on the 28S gene sequences showed that the samples from Yantai Shandong, Xiamen Port intercepted samples from Australian Radiata Pine logs, the German samples, and the American samples were clustered into one branch with 100% confidence. The Yantai Shangdong samples shared the same haplotype with the H. ligniperda samples intercepted from New Zealand Radiata Pine logs based on COⅠ sequence, indicating that the invasive alien species H. ligniperda has been established in China. This insect seriously damages roots of the host trees. Conclusion: It is the first time to find the colonization and serious damage of the major invasive pest, H. ligniperda, in China. The main morphological characteristics have been identified, and the infestation characteristics have been preliminarily clarified. The results of gene sequence analysis provide a basis for developing rapid identification technology and traceability analysis. This study would provide a theoretical basis and technical support for its detection and monitoring.

Key words: Hylurgus ligniperda, morphological characteristics, molecular identification, damaging characteristics

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