Research And Application On Physical Disease Prevention Technology In Flue-cured Tobacco Seedling Factory

Objective:Flue-cured tobacco intensive seedling prone to the spread of disease problems.In the past,-people used chemical control methods,which not only affect the quality of flue-cured tobacco and tobacco,but also pollute the environment.The seedling disinfection method,electric mist prevention promoting system on seedling physiological indexes,physical control technique of insect population,effects of atomic oxygen injection system on tobacco seedling pathogenic effects of the 4 aspects of the research,system integration of flue cured tobacco seedling workshop physical prevention technology system and application,The main results are as follows:1.Effect of different sterilization methods on the microbial test results:physical results for CK need of total phenolic content,25cm2 phenol/mg 0.23;total phenol content of the potassium chloride electrolyte needs,25cm2/mg phenolic content is 0.04.Potassium chloride electrolyte sterilization disinfection effect than traditional chemical methods,the ozone disinfection,high temperature disinfection method.Effects of different treatments on Miao Pan and matrix results:floating tray seedlings of early development and later developed rapidly,sustainability characteristics.Conventional breeding method and persistent growth capacity of vulnerable,when grow up to 4 leaf 1 heart,the weak showing more and more clearly.Results for the effect of different treatments on main diseases:long period stored seedlings can reduce chance of tobacco seedlings infected with mosaic virus and reduced conditions for seedling TMV test must be negative reaction initially,TMV has a strong positive reaction of disseminated.Effects of different treatments on biological indicators of results:floating seedling raising method and tray seedling method there are biological indicators of performance characteristics of a more balanced,tray seedlings to cultivate tobacco seedlings part index is particularly acute,it is a better method of flue-cured tobacco seedlings in floating system seedling raising method.(2)Test take 8 samples in the shed and a regular shed,same than only monitoring the situation of a virus,see test from the test results can be shed in the TMV virus was 20%,while regular rate 40%in the shed.Test house CMV and two virus PVY virus was 10%,while regular awning with a rate of 30%.Test house PVY virus was 10%,in the contrast of conventional Studio has the advantage,its rate of 0%.Two ways of cultivation are not detected with cucumber mosaic virus(CMV).(3)Research results show that the different physical control techniques in different environment after applying electric mist systems to control pests and diseases,powdery mildew incidence compared with traditional greenhouses 31.7%less compared with traditional greenhouses reduce incidence of Botrytis cinerea 19%;16.2%reduction in disease incidence compared with traditional greenhouses.Note electric mist systems for pest and disease control effect is more noticeable.Promoting systems for different types of electric mist prevention of airborne virms have a certain effect,with a 3DF-660 control works best in different environments for pathogenic bacteria to remove air rate of 40?99%,application area of up to 600 square meters,(4)Nanjiang 3rd after you apply atomic oxygen injection system diseases and pests in tobacco seedling test group and the Group of CMV and PVY are 0%,Yunyan,97 of the CMV virus is 0%,two varieties of cataplexy pathogen,anthrax bacteria inhibition rate of 100%.After planting in 30D,60d,90d,sample tobacco seedlings,respectively,disease control rate of 1.6%,6.6%,8.3%,higher than disease control rates were reduced,and 13.4%,and 11.7%.Description of atomic oxygen injection system for different varieties of tobacco seedling pathogens have a certain effect.