Difference Analysis of Biological Characteristics of Valsa Canker Isolates in Jujube Orchard

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Difference Analysis of Biological Characteristics of Valsa Canker Isolates in Jujube Orchard

Author(s):: LIU Zhenya1; 2; ZHANG Wangbin1; 2; TANG Junyu2; SHAO Yanhui2; DAN Hongxia2; （1.Key Laboratory of Integrated Pest Management on Crop in Northwestern Oasis,Ministry of Agriculture,P.R.China,Urumqi, Xinjiang 830091;2.Southern Xinjiang Key Laboratory of IPM,Tarim University,Alar,Xinjiang 843300)

Keywords:: Valsa canker; tree species composition; cultivation characteristics

Abstract:: Valsa canker pathogen of jujube orchard and protection forest were used as materials,the isolates were isolated by tissue associated and confirmed by Koch′s postulates；the isolates were inoculated in the PDA medium and put under different conditions to observe and record biological characteristics.The sporophore were picked out and sliced.Biological characteristics of Valsa canker pathogen of jujube orchard and protection forest were studied to make clear the difference in biological characteristics.The results showed that the isolates of woods canker fell into three types in Aksu of Xinjiang；the aerial mycelia was none and pinnate type;the aerial mycelia was thin and wheel type;the aerial mycelia was thin and radiate type,the optimum temperature was 25-28 ℃;the optimum pH was 4-5;light had obvious stimulative effect on mycelial growth；all the isolates could grow on the carbon and nitrogen sources of sample tested,it indicated that the isolates had universality for nutrient requirements；the size of pycnidium longitudinal and cross section,high temperature tolerance and the adaptability of sun-light condition,which was related to host and geographical location；it had adaptability to acid-base which was related to host location,while nothing to do with geographical location.

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Last Update: 2018-06-29