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Studies On The Occurrence Dynamics Of Diseases And Insect Pests And Their Nonpollutant Control Techniques On Facility Vegetables

Posted on:2005-01-02Degree:MasterType:Thesis
Country:ChinaCandidate:A Z RenFull Text:PDF
GTID:2133360152999469Subject:Agricultural extension
Abstract/Summary:PDF Full Text Request
Base on LiaoCheng district ,We censused the garden plant diseases and insect pests , Summarized the problems which exist in the occurrence and control, Analysed the tendency, Studied the main species' activity regularity and Integrated Management.1. In all we meet more than 160 kinds of garden plants .MostOf them can be injuried by one or several diseases or insect pests .Few plant was not be injuried by diseases or insect pests, Such as Broussonetia papyrifera, Metasequoia glyptostroboides, B.thumbergii and Cedrus deodara etc. There are 113 varieties diseases, Include fungus disease, bacterial disease, vrus dieasemycoplasma-like organism disease and roundworm disease ;And thereare 127 varieties insect pests, belong to Lepidoptera, Coleoptera, Homoptera , Orthoptera, Hemiptera, Thysanoptera, etc , By identification to the specimen collected . Among them varieties were reported for the first time in the area. And more than 20 diseases and nearly 40 insect pests are bad species, such as Rose Black Spot and Root-knot Nematode, Euonymus japonicus Powdery Mildew, Leaf Spot and Corky Scab, Cherry Shot Hole, silktree Bright, Redbud Thracnose and Spot, Turfgrass Brown Spot, Rust and Fusarium Root Rot, etc. Branch-borers, such as Cossus orientalis Gacde , Agrilus sp., Eucryptorrhynchus brandti (Harold), and many Cerambyxida ; leaf-eating insects, such as Diaphania perspectalis, Semiothisa cinerearia, Sylepta derogata Fabricius, Megachile nipponica Cockerell and Nomophila noctuclla ; Piercing-sucking pects such as Phytophthria , Mites, Scale insects, Whitefly , Leafhopper, Thripand Syllap. And insect pest is more serious than disease.In different rigon or ecological environment, The community composition is different. In difference years or seasons , Thedominant species is different .2. By investigation, It was found that garden plant Protection is backward to afforesting, And they were seriously separated fromeach other. Corresponding input is scarce , And the technical force is weak . In the mean time .Some new tendency was appearing. First, Some new kinds appeared one after another, They were spreaded with plants introduced from elsewhere, becoming more and more serious , Such as Thysanogyna limbata, Agriius sp. and Semanotus bifascia t us, etc. Second, Liriomyza sativae and Bemisia argentifolii also settled down in city planting area, which are important quarantine agricultural pests. Third, With fruit trees introduced into city , Some diseases and pests such as Stephanitis nashi, Tetranychus viennensis, Erythroneura sudra and Cherry Shot Hole are getting more serious. Fouth,Along with the kinds of garden plant and planting distribution getting more , polyphagous insect pests, such as grub, Lygus lucorum andFrankliniella intonsa, etc. were getting very serious, Especcially some heteroecous diseases and insect pests, such as Pear Rust and Aphisgossypii were getting more and more serous .Because they can transfer from one host to another.3. By research, It was clear that some pests' life cycle, population fluctuation and influencing factor were in local area, such as Diaphania perspectalis , Agriius sp., Cossus oriental is and Eucryptorrhynchus brandti .By research, we also found that the specifics, distribution, Damages of disetises and insect pests on grandifoliate box and lawn, And the important kinds' population fluctuation and influencing factor .For example,There are 55 species of phytophagous insects and other animals in lawn in local area.By research ,Tt was clear that the pathogen, symptom,infection cycle and influencing factor of Rose black spot, Euonymus japonicus powdery mildew and Silktree bright were. 4. In conclusion, We devise control measures on Albizia julibrissin Bright, Rose Black Spot, Euonymus japonicus' s main diseases and insect pests and branch-borers. For example, we must carry out plant quarantine, physical & mechnical control, chemical control and biological control, etc. to manage branch-borers. Then put forward many proposals for the managrement to garden plant diseases and insect pests in local area, Such as we should pay attention to garden plant protect; Strengthen cor responding scientific research , Avoid the fruit tree diseases and insect pests which coming up to city speading to other garden plant;Allowing ecological principles to contral the garden plant diseases and insect pests, etc.
Keywords/Search Tags:LiaoCheng, Garden plantl Diseases and insect pestsl Species composition, Occurrence regularity, Management
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