Investigation And Control Strategy Of Tomato Plant Disease In Yongning County,Ningxia

Yongning county is an important vegetable producing area of facilities in Ningxia.In recent years,Yongning county has developed rapidly.The main planting varieties include tomatoes,peppers,cucumbers and so on.As the facility cultivation is carried out under semi-closed conditions,it has a unique water,fertilizer,gas and heat environment,forming its unique soil nutrients and ecological environment characteristics.In recent years,tomato diseases in facilities have become more and more serious,which directly affect the yield and quality of agricultural products and farmers' income.However,at present,the prevention and treatment of diseases are still dominated by chemical agents,ignoring the use of disease-resistant varieties,biological,physical,agricultural and other means of prevention and treatment,and failing to form comprehensive prevention and treatment measures suitable for local climate characteristics and cultivation methods.Based on the investigation of the occurrence of facility tomato disease in Yongning county,this paper analyzed the factors influencing the occurrence of the disease,and discussed the prevention and treatment strategies of facility tomato disease in Yongning county through the selection of disease-resistant varieties and disease control agents.The results are as follows:1?Facilities tomato diseases in Yongning county mainly include gray mold disease,leaf mold disease,late epidemic disease,early epidemic disease,viral disease,bacterial maculopathy and physiological diseases.Among them,the incidence of gray mould of tomato is the highest,virus disease,blight and bacterial maculopathy are also common.2?Investigation and data analysis showed that soil nutrient elevation,long-term blind fertilization and high temperature and humidity were conducive to the occurrence of diseases.3?The TY virus resistance screening test of tomato showed that three tomato varieties,including tfdy-006,borei no.1 and neunem 1618,had strong resistance to TY virus,which was worthy of promotion and utilization.Through the screening test of different agents to prevent and control gray mold,the results showed that the harm of gray mold could be effectively controlled by alternating 1000 times of shijiale solution and 1200 times of sukkerin solution.4?By disease types and occurrence and influence factors analysis and field experiments,the preliminary summary,formed the scientific fertilization low-toxin chemical grafting,use of disease-resistant varieties,crop rotation,cucumber,and intelligent micro environmental control and other agricultural measures,biological control,physical control and chemical control facilities to harmonize the integrated control strategy of tomato.