为防控早竹秆褐色条斑病,减少该病害对早竹产业造成的损失,笔者主要针对早竹秆褐色条斑病发病规律进行了研究。结果表明:早竹秆褐色条斑病发生的最适温度为20～25 ℃,温度低于5 ℃或高于30 ℃均不利于病害的发生; 适宜的湿度和降水量利于病害的发生; 病害流行的高峰期为5—7月。病原菌(芦苇节菱孢)孢子可在林地铺设的砻糠中越冬,通过气流或雨水飞溅传播,经过伤口侵染竹组织。铺设砻糠的林地病害率高于未铺设砻糠的林地; 密林中早竹的感病指数比疏林中早竹的高; 林缘早竹的感病指数高于林内早竹; 早竹秆褐色条斑病在3年生和4年生早竹上发病较为严重。
Abstract
In recent years, brown culm streak of Phyllostachys praecox occurred in the bamboo plantation commonly. We studied the disease regularity to control the development of the disease and reduce the loss of bamboo industry. The results showed that the optimum temperature of disease occurrence was 20 ℃ to 25 ℃. The temperature which was below 5 ℃ or above 30 ℃ was not conducive to the occurrence of the disease and the peak of the disease appeared between May to July. The spores of Arthrinium arundinis could overwinter in rice hulls, spread by airflow or rain and infect through the wounds. The infection index of brown culm streak in chaff and dense forest were higher. The Phyllostachys praecox in the forest edge or the older bamboo(such as 3 or 4 year-old bamboo)were infected easily.
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基金
收稿日期:2014-06-05 修回日期:2014-12-04
基金项目:国家林业公益性行业科研专项项目(201004061); 江苏高校优势学科建设工程资助项目(PAPD)
第一作者:陈凯,硕士。*通信作者:吴小芹,教授。E-mail: xqwu@njfu.edu.cn。
引文格式:陈凯,吴小芹,薛旗. 早竹秆褐色条斑病的流行规律[J]. 南京林业大学学报:自然科学版,2015,39(2):75-78.
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