Study On Disease And Pests Of Forestation Plants In Changzhi City

Landscaping is becoming an indispensable part of the development of a city, which can not only beautify environment, but also a preferable measure to keep the ecological balance to some extent.The Changzhi City had already become the symbol of landscaping in recent year, which keeps 40.61% of green space and 45.32% green coverage rate. However, with the development of landscaping, the plant diseases and insect pests becoming more active than before.This paper had finish the research of the type of green plants, plants diseases and insect pests in Changzhi from March 2012 to October 2014, and gave a detail exploration of the source of plant diseases and insect pests, the results are as follows:1.There were 150 kinds of green plants in the Changzhi City, include 48 branches,100 categories,6 kinds of evergreen trees,69 kinds of deciduous tree,5 kinds of manzanita,54 kinds of sheepberry,9 kinds of liana and 7 kinds of lawn grass.2. There were 15 kinds of Common plant diseases.They were:black spot disease,crown gall disease,rust disease, powdery mildew,dry rot,blight,anthracnose,sooty mould,root rot,pythium disease,brown blotch,peach leaf curl,outer velum breaking disease,sophora japonica linn,begonia rot.The majoy plant disease in the Changzhi City were powdery mildew (about 62.5% infected plants were white clover, boxwood, crape myrtle, Chinese rose and Platanus orientalis); blight (most common disease between green plants, the morbidity of the most typical case is 9.6% to 21.3% on euonymus japonicas) and leaf curl (host plant are flowering peach, nearly 59.2% incidence rate).3. There were 31 kinds of Common plant pests. They were Aphis gossypii Glover,Myzus persicae,Hyalopterus arundimis Fabricius,Tuberocephalus momonis,Cinara pinitabulaeformis Zhang,Aphis citricola Vander Goot,Mcrosiphum rosirvorum Zhan,Aphis sophoricola Zhang,Chaito phorus populeti) ,Drosicha contrahens,Parthenolecanium corni (Bouche),Ericerus pela Chavannes,Eriococcus legerstroemiae Kuwana,Ceroplastes japonicas Guaind,Cnidocampa flavescens(Walker),Phalera flavescens Breneret Grey,Telphusa chloroderces Meyrich,Porthesia similis(Fueszly),Parocneria furva(Leech),Helicoverpa armigera Hubner,Semiothisa cmerearia (Bremer et Grey),iaphania perspectalia,Bradybaena ravida (Benson),Tetranychus cinnbarinus,Empoasca flavescens(Fab.) ,Lycorma delicatula,Dendroctonns valensLe Conte,Trialeurodes vaporariorum (Westwood),Lampralimbata Gedler,Anomala corpulenta Motsch,Holotrichia diomphalia Bates.The time of occurrence and the main victims of plants are:Semiothisa cmerearia (Bremer et Grey): May to September, affected plant is sophora japonica. Drosicha contrahens:February to May, affected plants are malus spectabilis, sophora japonica, Chinese rose etc. Bradybaena ravida (Benson):May to October, affected plants is clover. Diaphania perspectalia:April to October, affected plants are euonymus japonicas, buxus microphylla and ectMoreover,Myzws persicae:March to October,affected plants are flowering peach ect.