期刊
PLANT DISEASE
卷 105, 期 10, 页码 2955-2963出版社
AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/PDIS-07-20-1424-RE
关键词
fungal pathogens; forest pathology; fungi
资金
- National Key R&D Program of China [2017YFD0600104]
In 2019, leaf spot and dieback were observed on box elder in a nursery in Tai'an city, Shandong Province, China, with a disease incidence of 86%, and 75% of isolates from shoots and 66.6% from leaves were identified as Exserohilum rostratum. Experimental results suggest that the pathogen may worsen under conditions of strong winds, sudden temperature drops, or insect infestations.
Leaf spot and dieback were observed on box elder (Acer negundo) grown in a nursery in Tai'an city, Shandong Province, China, in 2019, with a disease incidence of 86%. The incidences of Exserohilum rostratum isolation were 75% from the shoots and 66.6% from the leaves of field-infected plants. Isolates were identified at the species level on the basis of morphological characteristics and through phylogenetic analysis of concatenated partial sequences of the internal transcribed spacer (ITS) region and cam, gapdh, tef1, rpb2, tub2, and his genes from the Exserohilum isolates. The effects of temperature on the mycelial growth of the Exserohilum rostratum isolates were also characterized. In greenhouse tests, seedlings inoculated with the pathogen exhibited systemic symptoms similar to those observed in the field. In pathogenicity experiments on shoots, wounded seedlings were observed to be blighted, suggesting that leaf spot and dieback may develop into more severe blight or dieback when high winds, sudden temperature decreases, or insect infestations occur. To our knowledge, this is the first report of dieback and leaf spot caused by E. rostratum on a species of A. negundo.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据