Qingzhou Houtu Flower Seedlings Co., Ltd.



Contact: Manager Huang

Contact number: 18265367608


Address: East of Zhaosi Village, Huanglou Street Office, Qingzhou City, Weifang City, Shandong Province


Investigation on Leaf Diseases of Holly Euonymus

Holly Euonymus(EuonymusjaponicusThunb.) Also known as Euonymus japonicus, native to Japan, is an evergreen shrub and small tree species of the genus Euonymus (Celastraceae), due to its resistance to barren, drought, pollution, and fast growth. , Extensive management, pruning resistance and other characteristics, is one of the important tree species for garden greening, ornamental and environmental protection. However, in recent years, leaf diseases have been widespread and serious in China. The mild lesions affect the growth, and the severe ones die, die or even die in pieces, seriously affecting the ornamental value and greening effect. The epidemic year caused a large number of fall leaves of Holly Euonymus from 8 to 1 during the month of October, and the disease was particularly serious in areas with extensive management.
Therefore, it is of great significance to carry out a systematic investigation of Euonymus japonicus leaf diseases, grasp the occurrence and prevalence of diseases, and identify the main pathogens of pathogenic bacteria, to explore the germplasm resources of Euonymus japonicus and formulate targeted comprehensive control measures.
Diseases of the leaves of Holly Euonymus are common in China and seriously affect its ornamental value and afforestation. When the disease is severe, it can cause the whole plant to die. The system investigated the occurrence and damage of leaf diseases, and identified the main pathogens. The results show that the symptoms of leaf diseases mainly include 4 species: the infection of type I disease is early, and the period from 6 to {{2}} is the peak period; type II and Type Ⅲ disease often occurs mixedly, and the same leaf may have 2 kinds of disease spots, 8 ~ 10 months as the peak period of disease; Type Ⅳ disease can only invade from the wound, and the pathogen has no strict nutrition requirements , It has strong adaptability, and under the condition of high temperature and high humidity, it is easy to cause the prevalence of diseases. Combining morphological observation and molecular identification analysis of ITS sequence, the pathogen of type Ⅳ disease was identified as Neopest. £ ottopsisfoedans.