一株分离自茶轮斑病病叶的病原物鉴定

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中图分类号：S571.1；S435.711文献标志码：A

文章编号：1000-369X（2026）02-0311-07

Abstract： Tea grey blight is one ofthe most important diseases in tea producing areas in China， which is common in old leaves， mature leaves and young bud leaves.In this study，a strain L352 was isolated and purified from tea grey blight leaves in Duyun City，Guizhou.The strain L352 was identified based on morphological characteristics and a multi-gene phylogenetic tree was established using the ITS， β -tub and EF-1α genes. The results show that the conidia of strain L352 were mostly composed of 5cels with 4 transverse-septa， featuring three pigmented cells in the middle.Occasionally，6cells with 5transverse-septa were observed，containingfourpigmentedcellsinthe midle. The phylogenetic tree indicates that it was clustered into a relatively independent clade with Pestalotiopsis rosea， with a support rate of 100% . The pathogen was finally identified as Pestalotiopsis rosea，and it was the first discovery of this species causing tea grey blight disease in Camellia sinensis.

Keywords：teagreyblight，Pestalotiopsis，Pestalotiopsisrosea，identification

茶轮斑病又称茶稍枯死病，是一种严重影响茶叶产量和品质的茶树叶部病害[1]。（剩余9830字）