title: [Three-dimensional spatial distribution patterns of Monochamus alternatus and its natural enemy Dastarcus helophoroides].
abstract: In 2003 to approximately 2005, the Monochamus alternatus-infected Pinus thunbergii, P. massoniana and P. elliotii in pure and mixed forests were selected as attractants and dissected with one meter section manner, and five aggregation indices were used to analyze the spatial distribution patterns of M. alternatus and its natural enemy Dastarcus helophoroides. The results showed that M. alternatus and D. helophoroides had the horizontal distribution indices of diffused coefficient C > 1, diffused index I delta > 1, Kuno index C(A) > 0, clump intensity index I > 1, and swarm index Iw > 1 in the two stands, suggesting their aggregated horizontal distribution patterns, and except D. helophoroides on the P. massoniana in mixed forest appeared assemble vertical distribution, these two insects all had an even vertical distribution, with their C < 1, I delta < 1, C(A) < 0, Iw < 1, and I < 0. The spatial distribution patterns of M. alternatus and D. helophoroides were consistent, and the latter was spatially following the former.
authors.affiliation: Provincial Key Laboratory for Microbial Control, Anhui Agricultural University, Hefei 230036, China. cxy700210@tom.com
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Chen
authors.forename: Yunding
authors.initials: Y
authors.lastname: Zou
authors.forename: Yuzhou
authors.initials: Y
authors.lastname: Ding
authors.forename: Houzhang
authors.initials: H
authors.lastname: Wu
authors.forename: Zhengzhi
authors.initials: Z
authors.lastname: Li
authors.forename: Xuefei
authors.initials: X
authors.lastname: Lin
authors.forename: Wenjun
authors.initials: W
authors.lastname: Wang
authors.forename: Fangxin
authors.initials: F
authors.lastname: Tian
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000502:physiology*; D017753:Ecosystem; D010572:Pest Control, Biological; D028223:Pinus / Q000469:parasitology*; D011157:Population Dynamics; D011235:Predatory Behavior / Q000502:physiology*