沈阳市油松松材线虫病发病规律观察  

Occurrence regularity of pine wilt disease of Pinus tabuliformis in Shenyang

作　　者：祁金玉[1] 秦世杰[1] 尹大川[1] 杨丽元 李硕 孙守慧[1] QI Jinyu;QIN Shijie;YIN Dachuan;YANG Liyuan;LI Shuo;SUN Shouhui(Collage of Forestry,Shenyang Agricultural University,Shenyang 110866,China)

机构地区：[1]沈阳农业大学林学院,辽宁沈阳110866

出　　处：《中国森林病虫》2023年第3期57-60,共4页Forest Pest and Disease

基　　金：沈阳市科学技术计划项目“沈阳市松材线虫病防治技术研究”(18−400−3−03)。

摘　　要：为了明确自然状态下油松感染松材线虫后的发病规律,采用直接观察法、流脂观察法、松材线虫分离鉴定等方法对沈阳市东陵公园内约70 a生油松大树发病过程及症状特征进行了持续性观察。结果表明:感病油松表现为当年、越1年和越2年枯死,以越1年枯死类型为主。油松受害初期,不同小枝的同一时间受害症状不同,枯死针叶在树冠上无规则星状分布,受害后期,树冠下小枝发病过程整齐统一。油松枯死5~6个月后针叶开始脱落。枯死油松胸径以下树皮上多有天牛危害痕迹,无流脂现象。该结果可为东北地区松材线虫病的防治提供依据。To clarify the occurrence regularity of pine wilt disease(PWD)after Pinus tabuliformis was infected with Bursaphelenchus xylophilus in natural condition,the occurrence and symptom characteristics of P.tabuliformis about 70-year-old in Dongling Park of Shenyang were continuously observed by direct observation,oleoresin exudation observation,isolation and identification of B.xylophilus.The result showed that P.tabuliformis infected would die in the current year,more than one year or more than two years and mainly died in more than one year.In the early stage of P.tabuliformis infected,different trees or different twigs of the same tree had different harmful symptoms at the same time,dead needles were distributed irregularly in the crown,and the process of disease of twigs under the crown was uniform in the late stage of damage.The needles of P.tabuliformis dead for 5-6 months began to fall off.There were many traces of longhorn beetle damage on the bark below the diameter at breast height of P.tabuliformis,and without resin and gum flow.This study provide a theoretical basis for prevention and control of PWD in Northeast China.

关 键 词：松材线虫 油松 发病规律 症状 

分 类 号：S763.16[农业科学—森林保护学]