Occurrence And Field Control Of Meloidogyne Incongnita On Angelica Dahurica In Qiaocheng County,Bozhou

This paper aims at developing a set of control tecnicques to Meloidogyne incongnita to meet the special requirements in Bozhou Qiaocheng county An Hui province and reducing applicaitons of chemical nematicides,find low toxicity,low residual prevention methods,based on seriers of investigations of plant diseased occrence patten,we carried out a series of field control effect experiment to find prevention methods,setcorreponding prevention measures preliminarily.Nematodes of four traditional chinese medicinal materials species hosts was identified using morphology identification method in Bozhou Qiaocheng county and all of root knot nematodes are M.incognita.Root knot intensity of four traditional chinese medicinal materials species hosts was compared by Duncan's multiple analysis method,Angelica dahurica root knot intensity was significantly greater than Platycodon grandiflorum,Atractylodes macrocephala and Divaricate Saposhnikovia Root(p < 0.05).Continuous cropping years of A.dahurica field nematode distribution types were investigated by diffusion coefficient C and other indicators,nematode distribution type is aggregated distribution.We also found root knot nematodes have 10 kinds of weeds for parasitism,such as parasitic Ixeris polycephala Cass,Portulaca oleracea.Angelica dahurica rhizosphere population dynamic was monitored,found that after soil flame disinfection treatment frequency inhibition rate was 66.88%,providing a theoretical basis for the effect of soil flame disinfection treatment on the nematode occurrence rules.Through determination of weeds control,soil flame disinfection treatment on the control effect of M.incongnita,found that inhibition of artificial weeding processing to J2 is 65.08%.M.incongnita control efficacy by TS preparations treatment is obvious,A.dahurica dry weight increasing rate is 17.5%.M.incongnita control efficacy by soil flame disinfection treatment is extremely obvious.A.dahurica dry weight increasing rate of is 115.64%.Influence on soil ecological environment and the physical and chemical properties were discussed in the field trials of soil flame disinfection treatment.We found that colony type of soil flame disinfection treatment is rich,the quantities of colony of per petri dish is highest,soil flame disinfection treatment on soil ecological and environmental impact can be recovered.Soil structure and the physical and chemical properties have some change,most of that is recoverable,but the change of the soil texture has the irreversibility.Through the above conclusions,in the course of agricultural production,choosing disease-free seedling or seeds before sowing,using soil flame disinfection treatment at the same time seeding time and change the way of planting adopt proper crop rotation,at later growth stage in plant source agent or low residual no residual chemicals to carry on the comprehensive measures for prevention and control of auxiliary line suppression.This experiment is the first to weeds host and population dynamic has carried on the investigation and monitoring,to provide a basis for the weed control and nematodes in laws.Evaluation for the first time the flame sterilize field control effect of root knot nematode and flame disinfection effect on soil ecological environment and the physical and chemical properties,to explore Bozhou Qiaocheng county root knot nematode harm,for the occurrence rules of root knot nematode disease prevention and control of Chinese medicinal materials and the special requirements,formulate corresponding solutions for the prevention and control of field,to establish a complete set of Chinese herbal medicine foundation soil borne disease control technology.