摘要
桉树焦枯病是广西近年来较严重的桉树病害之一。经常规组织分离鉴定确定广西桉树焦枯病病原菌主要有5种:Cylindrocladium quinqueseptatum,Cy.floridanum,Cy.scoparium,Calonectria sulawesiensis,Ca.hongkongensis。其中Ca.sulawesiensis和Ca.hongkongensis是国内新发现的2种焦枯病菌。在广西,桉树焦枯病4月下旬开始发病,12月初结束,高峰期在7—8月。病害的发展与当地气候条件关系密切,尤其是降雨量、相对湿度和温度直接影响病害的发生程度。该病的发生程度与桉树的树龄、品种、所处地理位置、坡向、坡位有关。一年生以下桉林或桉苗、北坡和山脚洼地的树林发病较重;广西的两大主栽无性系中,广林9号抗病性较强,而DH 32-29相对较感病。
In recent years,dieback is one of the serious diseases on Eucalyptus in Guangxi of China. The pathogens of Eucalyptus dieback were identified as five species： Cylindrocladium quinqueseptatum,Cy.floridanum,Cy. scoparium,Calonectria sulawesiensis and Ca. hongkongensis,of which Ca. sulawesiensis and Ca. hongkongensiswas were firstly found in China based on morphological characters and DNA sequences comparison. Eucalyptus dieback occurred in the last ten days of April with a peak between July and August,then the disease gradually stopped in early December. The development of the disease was closely related to local climatic conditions,especially to the rainfall,relative humidity and temperature. The incidence degree was related to varieties,the geographic location,forest age,directions of slope and position of slope. The trees of one year old and belowgrown on north slope and at the foot of mountain were infected more seriously. Among two main clones grown in Guangxi,Guanglin No. 9 was more resistant and DH 32-29 was more susceptible.
出处
《中国森林病虫》
北大核心
2014年第6期30-34,共5页
Forest Pest and Disease
基金
广西自然科学基金重大项目(2010GXNSFD169007
2011GXNSFD11166-01
2011 GXNSFD1123014)资助
关键词
桉树
焦枯病
发病规律
eucalyptus
dieback disease
epidemic regularity
