The Research Of Pests On Landscape Trees In Hebei

With the accelerated process of urbanization, the landscape of Hebei province further accelerate the pace of construction, the introduction of a large number of new varieties of plants change the original structure of plant community in the city, making the original ecological environment changes, and provide certain conditions for the occurrence of pests to. At the same time, because of climate change, and improper maintenance management measures, the city garden tree pests occur frequently, but for the species, occurrence of pests of garden trees, and the regularity of the biological characteristics of some important pests in Hebei Province are still unknown, we cannot take scientific measures to prevent and control.This article first carried on the investigation research of pest species and occurrence degree on the landscape trees in Hebei. Secondly it has carried on the detailed investigation and study to Anoplophora glabripennis from six aspects: the tree species selection, the choice of city, the choice of location, the choice of small environment, with plants number choice and tree diameter at breast height range selection. And the paper has carried on the correlation analysis, multiple linear regression analysis, factor analysis about the host trees and Anoplophora glabripennis damage physical traits by using SPSS. The main results are as follows:1. Species of insect pests on landscape trees in HebeiIn April 2014 to October 2014, after extensive investigation of 26 parks, 6 scenic areas or campus green space, found that the main insect pests 190 species, belonging to 69 families, 10 orders. This paper has also described the pest species distribution and the damage degree. It has found the native tree species from the dangers of the pest is most serious. We put forward some suggestions on the prevention and control of main pests.2.Occurrence regularity of Anoplophora glabripennisThis paper has carried on the detailed investigation and study to Anoplophora glabripennis which is serious harm to landscape trees. The weeping willows and sycamore are widely used in the landscaping. So the study chose the weeping willows and sycamore which are easy to harm by Anoplophora glabripennis as the research object. Occurrence rule of A.glabripennis are as follows:(1)Through the comparative investigation on Anoplophora glabripennis hazard degree to weeping willows and sycamore, this paper studied on tree species selection of Anoplophora glabripennis. Results: the degree of harm of A.glabripennis of weeping willow is far greater than the harm to the sycamore.(2)Through the investigation on the damage of A.glabripennis in 4 cities in Hebei Province, this article studied Anoplophora glabripenni’s choice of different cities. Results: the damage of Anoplophora glabripennis in 4 city has significant differences.(3)Through the comparative study on A.glabripennis hazards in different direction s, this paper explored the A.glabripennis to light intensity selection. Results: the har m of it on different position from strong to weak as follows: West>East >North>So uth.(4)Based on the comparative study of Anoplophora glabripennis hazard degree in different position on the road, and the comparative survey of the degree of harm to the road and the water’s edge, this paper studied on the choice of environment of Anoplophora glabripennis. Results: Anoplophora glabripennis is more biased in favor of the intersection of the complex environment and it is more serious in the harm degree of the water’s edge.(5) Plant species planted with host trees were divided into three groups:<5,5~10,≧10,and compared the degree of harm of Anoplophora glabripennis in all 3 groups.Results: A.glabripennis harm degree within the range of 5 to 10 is minimal.(6)In this investigation, the host tree DBH was divided into 3 groups:<20cm,20cm-40 cm,≧40cm.This paper studied the A.glabripennis occurrence and DBH correlation. R esults: the degree of harm of willow and sycamore were damaged in the 20cm-40 cm dia meter range of Anoplophora glabripennis reached the maximum.3. Statistical analysis of quantitative traits of Anoplophora glabripennis(1)Using the Spearman rank correlation coefficient to the physical properties of Anoplophora glabripennis hazards in the trees and the host tree breast-height diameter, tree height for correlation analysis. Results: there was a significant correlation between the physical characters of Anoplophora glabripennis hazards in the trees and the host age.(2)Using multiple linear regression analysis method regression analysis on the physical properties of Anoplophora glabripennis hazards in the trees and the host tree breast-height diameter, tree height. Results: the relationship between the number of larvae of Anoplophora glabripennis andother traits were not significant linear.(3)Using principal component analysis method and orthogonal rotation method with the Kaiser standard to carry on the factor analysis to the physical properties of Anoplophora glabripennis hazards in the trees. Results: the degree of harm of Anoplophora glabripennis on host trees can be evaluated by the method of factor analysis.In this study, making full use of experts knowledge, ideas, principles and methods to solve problem, the research conducted a survey on the insect pests of garden trees in Hebei Province and studied the occurrence rules of Anoplophora glabripennis from several aspects. Provide a comprehensive theoretical basis for the prevention and treatment of insect pests of garden trees in Hebei province.