What are the symptoms of anthracnose of Euonymus tomentosa?
Symptoms of anthracnose of Populus tomentosa: the disease occurs on leaves and shoots. The disease spot on the leaf is oval or round, the size is 3 to 12 mm, the edge of the disease spot has a narrow dark brown bulge, the center is gray-white, and the thick round or oval black spots are formed in the gray-white place in the later stage, which are sparsely arranged on the front of the leaf, sometimes in a wheel-like arrangement, that is, the conidium disk of the pathogen. On the tender shoots, the disease spots are striped and grayish white, with black dots on them, which can also cause branches to die. The disease often occurs mixed with Populus tomentosa. There can be two kinds of disease spots on the same leaf, which is that there is no yellow halo ring around the disease spot. On the other hand, there is a halo on the edge of brown spot.
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Control Techniques of Anthracnose and Leaf Spot of Euonymus Japonica
Euonymus chinensis is often used as hedge in garden. It has strong resistance to various toxic gases and smoke. However, the occurrence of anthracnose and leaf spot will make the plant defoliate ahead of time or even die, which seriously affects the ornamental effect of Euonymus chinensis. The two diseases often occur together, and there are two kinds of disease spots on the same leaf, but they can be prevented and treated simultaneously. 1. Anthracnose 1. Symptoms The disease occurs on leaves and young shoots. The leaf spots are oval or round and about 3 to 12 mm in diameter. There are narrow dark brown ridges on the edge of the lesion, medium
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Rapid Seedling raising technique of Euonymus tomentosa in Autumn
Euonymus tomentosa is an evergreen shrub of Celastraceae, its leaves are dark green and glossy, and it is often used as a hedge in landscaping, and the demand for greening is increasing year by year. Due to the drought and high temperature in spring and summer and severe cold in winter in North China, it is not conducive to the propagation and breeding of Euonymus tomentosa. The author has repeatedly tried the rapid seedling raising technique in autumn for many years, realized the seedling raising in autumn, transplanted it in the next spring, and bred commercial tree seedlings in one year, which created better economic benefits. The experience is introduced as follows: first, the cutting time should be carried out at the end of August and the beginning of October, preferably in the middle and late September.
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