Kiwi Diseases Survey And Kiwi Bacterial Canker Control In Guanzhong Area Of Shaanxi Province

As a kind of high quality health fruit,kiwi has great potential in the fruit consumption market both at home and abroad.Shaanxi,as the main planting area of Kiwifruit in China,has the largest planting area and total output in china.Diseases caused by pathogens such as fungi and bacteria have always been an important problem in agricultural production.There are many kinds of kiwifruit diseases,among which there are more than 10 species.In recent years,with the continuous expansion of the planting area of Actinidia chinensis,the change of cultivation methods and varieties,the main diseases affecting the production of kiwifruit have also changed.Kiwifruit canker is a major disease faced by kiwifruit growing areas all over the world.It has already brought about a devastating effect on kiwifruit industry in the world.Therefore,this research in the period of 2015-2017 in the main planting areas of Shaanxi Province,Qishan,Zhouzhi,Meixian kiwifruit in Yangling and other places to carry out the census of the main types of disease and the occurrence of kiwifruit;characteristics of peptic ulcer were analyzed,further evaluation of the control effect of several chemicals.The main results are as follows:1.From 2015 to 2016,the diseases of peach and peach in Shaanxi Guanzhong area were investigated by field symptom observation,disease collection,isolation,culture and pathogen identification.The survey results show that: in the survey period,the occurrence of fungal diseases in Kiwi black rot,sclerotinia blight and anthracnose,leaf spot,root rot disease,but the incidence of various diseases is light.2.the occurrence and characteristics of kiwifruit canker in Guanzhong area of Shaanxi province were investigated in 2016-2017 years.The results showed that the disease of kiwifruit was still an important disease in the investigated counties,with an average incidence rate.The analysis of disease incidence characteristics further found that different varieties of disease were significantly different among varieties,the incidence rate is the highest,Hong Yang,Xu Xiang Hayward incidence was significantly lower than that of the red sun;in addition,in the same survey area,rate at different ages is significantly different between occurrence of ulcer disease,the disease occurred more orchard age more serious.3.the effects of 8 chemicals on the field control of kiwifruit canker were evaluated by two methods: tree spray and branch coating.The results showed that the 8 tested agents had certain effects on the prevention and control of Kiwifruit canker.Compared with the two methods of pesticide application,it was found that the stem coating agent showed better control effect on the disease.The control effect of different chemical differences greatly,the best control effect for 71-83% copper hydroxide.