瘿螨为害引起的缩枝症组织解剖观察

2005年以来,在福建产区发现一新病症,表现为：春梢抽生期新梢与新叶不能正常伸展发育,枝条侧芽丛生大量芽体,芽体不发育为枝条或花芽,新梢与新叶皱缩呈球团状,最终枯死,导致树势衰退与减产。该病症暂称为＂缩枝症＂。通过对患部组织进行解剖观察发现：丛生芽体为典型的枝芽结构,寄生性瘿螨导致的螨瘿是造成缩枝症的直接原因。经初步鉴定,寄生瘿螨为桃下毛瘿螨（Acalitus persicae）。建议生产上防治对象为瘿螨。

Histological Anatomy Observation on Branch Atrophy Disease Caused by Eriophyid Mitein Prunus salicina var.Cordata

A new disease symptom was found in production area of Prunus salicina var.Cordata in Fujian province since 2005.New shoot elongation and leaf expansion in spring shoot sprouting period were restrained.A great number of cluster buds germinated from lateral buds.However,the buds won＇t develop into branches nor flowers and finally withered,resulting in tree regression and yield reduction.The disease was called ＂branch atrophy＂ temporarily.Anatomical observation indicated that cluster buds were typical foliar buds.Parasitic mite infested the cluster buds leading to branch atrophy disease.The mite was identified as Acalitus persicae preliminarily.Eriophyid mite control is important for preventing branch atrophy disease in P.salicina var.Cordata.