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Conference paper2022Peer reviewed

Identifying Nematode-Induced Wilt Using Hyperspectral Drone Images and Assessing the Potential of Early Detection

Li, Niwen; Zhang, Xiaoli; Huo, Langning


Since the pine wilt nematode spread and was discovered in China in 1982, it has caused severe damage to the pine forest and has caused a substantial finical loss. Detecting infected trees and removing them from the forest as early as possible is crucial to prevent its spread by the insect vector longhorn-beetles. This study aims at developing methods to detect and map infections using hyperspectral drone images. We inventoried 391 pines in middle east China and recorded them as healthy or early-, middle-, late-stage infected trees. The hyperspectral drone images were obtained with 0.11 m resolution and wavelength from 400 to 1000 nm, covering from red band to near-infrared (NIR). We used the successive projections algorithm (SPA) to select the sensitive bands and the support vector machine (SVM) algorithm to classify trees into different health statuses. The classification resulted in high accuracy during the middle and late-stage infection, while separating healthy and the early -stage infection was challenging. The developed method could map Pine wilt nematode infections and guide the sanitation felling as a crucial disease control measure.


support vector machines; Image resolution; Insects; Geoscience and remote sensing; Vegetation; Forestry; Machine learning

Published in

IEEE International Geoscience and Remote Sensing Symposium proceedings
2022, pages: 512-515
Title: IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium : proceedings
eISBN: 978-1-6654-2792-0
Publisher: Institute of Electrical and Electronics Engineers


IEEE International Geoscience and Remote Sensing Symposium (IGARSS), JUL 17-22, 2022, Kuala Lumpur, MALAYSIA

      SLU Authors

    • Associated SLU-program

      SLU Plant Protection Network
      SLU Forest Damage Center

      UKÄ Subject classification

      Remote Sensing
      Forest Science

      Publication identifier


      Permanent link to this page (URI)