Investigation And Prevention Of Main Diseases And Pests Of Walnut In Matian Town,Zuoquan County

The culture of walnut planting in Zuoquan County has a long history.It is one of the key production bases of walnut in Shanxi Province.It is known as one of the " Hometown of Chinese Walnuts".The local" Zuoquan Mian Walnut " was designated as a national geographical landmark in 2008.By the end of 2016,the walnut planting area was 350,000 mu.In the development of walnut industry in the county,walnut pests and diseases have long been the main bottleneck restricting the development of walnut industry in Zuoquan County,and it has not been effectively solved.This study investigated the pests and diseases of walnuts in the main administrative areas of 15 administrative villages in Matian Town,Zuoquan County,and confirmed the types of major pests and diseases of walnuts in Matian Town,Zuoquan County,and the degree of pests and diseases in different periods.In response to the above problems,we actively explored the prevention and control methods of new pesticides for major pests and diseases of walnuts in Zuoquan County.1.I found out the main pests and diseases of walnuts in 15 administrative villages in Matian Town,Zuoquan County,such as brown spot disease,walnut rot disease,mulberry white mites,anthracnose,stalks,cloud spotted beetles,rotten roots and yellow leaf disease.2.Walnut rot,the disease occurred in Matian Town,Zuoquan County all year round,and the incidence time difference was obvious at different times,The incidence rates from March to November are:51.50%?55.97%?70.10%?71.64%?76.60%?74.63%?76.10%?75.00%?73.50%.The control experiment of walnut rot disease shows that control experiment on rot disease by using " 20%bactericidal king(40?60 times liquid)+ PingPing Plus(40 times liquid)" judging from the area of healing and the therapeutic effect,the effect of drug application after engraving is significant.3.Walnut brown spot disease,the incidence of the disease in Matian Town,Zuoquan County,shows an increasing trend throughout the year.The incidence rate in May was only 2.0%,the incidence rate was 9.0%in June,25.5%in July,65.0%in August,81.0%in September,and 84.5%in October.The results of the control experiment of walnut brown spot disease show that,use 43%of "tebuconazole" 3000 to 4000 times solution,it can effectively prevent the occurrence rate of walnut brown spot disease by more than 90%4.Mulberry,in Matian Town,Zuoquan County,the incidence rate reached its peak in September,the lowest value in May.The incidence rate gradually increased,and the highest incidence rate was 10.8%higher than the lowest incidence rate.The results of the control experiment of mulberry sputum show that the key to prevention and control is to actually observe,master the first nymph period of the sang baiji,within 1 to 2 weeks of nymph incubation period use separately 40%"killing phosphorus emulsifiable concentrate" 1000?1500 times liquid.It can effectively control the occurrence and damage area of mulberry.