Incidence Mechanism of Black Spot Disease of Jujube in Xinjiang Alar Reclamation Area(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Incidence Mechanism of Black Spot Disease of Jujube in Xinjiang Alar Reclamation Area

Author(s):: FAN Xiaodong1; FU Ze1; ZHONG Conghui2; LIU Xinxin2; HUANG Jiafeng2; GAO Feng1; 1.College of Agriculture,Shihezi University/Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization,Shihezi,Xinjiang 832003；2.Forestry Workstation,The First Production Division,Xinjiang Production and Construction Corps,Alar,Xinjiang 843300

Keywords:: black spot of jujube; primary infection sources; the dynamics of conidia; epidemic factors

Abstract:: Black spot disease of jujube is the main disease in fruit maturity.Incidence characteristics of the disease including primary infection sources,relationships between airborne conidial concentration and disease severity,and main factors affecting factors disease epidemic were investigated by capturing airborne technique and stepwise multiple regression analysis.The results showed that pathogenic fungi present in plant debris were primary infection sources of jujube black spot disease.The conidia initial diffusion was observed in later May and its epidemic was from middle July to middle August.Conidia mainly distributed in jujube canopy.Conidial diffusion peak of daily dynamics was 12:00.Airborne conidial concentrations were positively correlated with temperature,rainfall and disease severity.The identification for the resistance of cultivated jujube varieties to black spot disease showed that Zizyphus jujuba Mill.cv.Huizao was more resistant to Zizyphus jujuba Mill.cv.Junzao.Black spot disease grew worse when using flood irrigation in jujube orchard.Rainfall in September was one of the most important factors,which affect the epidemic scale of black spot disease.In conclusion,the amount of pathogenic fungi,varieties,irrigation,temperature and rainfall co-determine the incidence and epidemic of black spot disease of jujube.

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Last Update: 2017-10-11