The effect of Elaeagnus angustifolia on the distribution of Anoplophora glabripennis
Author of the article:WANG Xuan1** YANG Zong-Ji1 HU Yu-Xiong1 REN Li-Li2 LUO You-Qing2 CHEN Yu-Lin3 WANG Dong-Xing4
Author's Workplace：1. College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China; 2. Beijing Key Laboratory for Forest Pest Control of Beijing Forestry University, Beijing 100083, China; 3. Forestry Pest Control and Quarantine Bureau of Xinjiang Bayingolin Mongol Autonomous Prefecture, Korla 841000, China; 4. Forestry Technical Service Centre, Suzhou District, Jiuquan City, Jiuquan 735000, China
Key Words： Anoplophora glabripennis; forest stand configuration; spatial pattern; geostatistics; clustered distribution
Abstract：
[Aim] To investigate the effect of
the trap-tree Elaeagnus angustifolia on the spatial distribution
of the Asian longhorn beetle, Anoplophora
glabripennis, with the aim of assessing the feasibility of controlling A.
glabripennis by planting E. angustifolia. [Methods] Geostatistical methods were employed to
analyze the spatial distribution pattern of A. glabripennis in mixed
forest stands that included E. angustifolia and the resistant tree
species Populus alba var. pyramidalis. [Results] The distribution of the A. glabripennis oviposition scars, frass holes + emergence holes, and oviposition scars + frass
holes + emergence holes were aggregated in different forest stands. The
distribution of these features best fitted exponential, Gaussian, and spherical
models, respectively. The aggregation of oviposition scars, oviposition scars +
frass holes + emergence holes was more pronounced in stands planted with E.
angustifolia than in a shelterbelt of pure P. alba var. pyramidalis.
The spatial dependence range of frass holes + emergence holes in a shelterbelt
of pure P. alba var. pyramidalis stands was the largest, with
clustering within a range of 2.89 m. The spatial dependence range of
oviposition scars was largest in stands with E. angustifolia; the
clustering range was 2.99 m in narrow shelterbelts comprised of E.
angustifolia, Salix wilhelmsiana, S. matsudana, and P.
alba var. pyramidalis, 12.98 m in wide shelterbelts containing E.
angustifolia and P. alba var. pyramidalis, and 12.37 m in
landscaping forests containing E. angustifolia and P. alba var. pyramidalis,
indicating a strong association between A. glabripennis and E.
angustifolia. A comparison of vector overlay maps of pest damage
characteristics in different forest stands with the results of field surveys
indicates that A. glabripennis tends to cluster around E.
angustifolia. Moreover, in stands containing both E. angustifolia and P. alba var. pyramidalis, A. glabripennis tends to be
more abundant on E. angustifolia, causing the A. glabripennis population to become more concentrated. [Conclusion] A. glabripennis has a clumped
distribution in different forest stands. Because A. glabripennis prefers
to lay eggs on E. angustifolia, planting the latter species may protect P.
alba var. pyramidalis.