叶斑病在广德市主要经济树种上的发生与防治  

The Occurrence and Control of Leaf Spot Disease on Major Economic Tree Species in Guangde City

作　　者：任建敏 REN Jian-min(Forestry Harmful Organism Control and Quarantine Station of Guangde City,Xuancheng,Anhui 242200)

机构地区：[1]广德市林业有害生物防治检疫站,安徽宣城242200

出　　处：《安徽农业科学》2024年第24期89-93,153,共6页Journal of Anhui Agricultural Sciences

摘　　要：2020—2023年在广德市主要经济树种毛竹和茶属(山茶花、茶树)上发生了较为明显的叶斑病,镜检后均发现链格孢属真菌。该研究调查了该病害的发生流行规律。通过对比调查,发现城市绿地种植的山茶花上病斑明显,危害重,在林地混交种植或林下种植的茶树上无典型病斑,危害轻微;发病毛竹林采取了适宜林分密度、留养乡土树种等措施,逐渐恢复健康。不当的栽培管理方式和生物多样性缺乏是该类病害发生流行的主要原因。From 2020 to 2023,significant leaf spot disease has occurred on the main economic tree species of bamboo and tea(Camellia L.),in Guangde City.After microscopic examination,Alternaria Nees was found.This paper investigates the prevalence patterns of this disease,through comparative investigation,it was found that camellia flowers planted in urban green spaces have obvious disease spots and serious harm,while tea trees planted in mixed forests or under forests have no typical disease spots and are less harmful.The diseased bamboo forest has gradually recovered its health by adopting measures such as suitable stand density and retaining local tree species.Improper cultivation management methods and lack of biodiversity are the main reasons for the occurrence and prevalence of this type of disease.

关 键 词：毛竹 茶 链格孢 生物多样性 

分 类 号：S763.15[农业科学—森林保护学]