Planting Technology Lists
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What are the symptoms of euonymus leaf spot disease?
Symptoms of Euonymus leaf spot disease: The disease occurs on the new leaves to produce small yellow spots, which expand into irregular large spots up to 1.5 mm, the edges of the spots are raised, the brown edges are wider, and there are extended yellow halos outside the raised edges. The center is yellowish brown or taupe, and the top is densely covered with black dots. That is, the pathogen's sub-seat, under a magnifying glass, the dot is black villous. In severe cases, the leaves fall off in the same year.
2019-01-15 -
Treatment of Leaf spot of Euonymus tomentosa
Euonymus tomentosa is a small evergreen shrub commonly used in gardens, which has many advantages, but the occurrence of leaf spot will cause early defoliation, bald branches and even death, which seriously affect the normal growth and ornamental effect of Euonymus tomentosa. Symptoms of leaf spot disease: at the beginning of the disease, there are small yellow spots on the leaves, which gradually become yellowish brown and enlarge into round or irregular spots with a diameter of 2 mm to 10 mm. The disease spot is grayish brown or grayish white in the later stage, and the edge is dark. There are many small black spots on the disease spot.
2019-01-15 -
Leaf spot of Euonymus tomentosa
The symptom is harmful to the young and old leaves of Euonymus tomentosa, with yellow-brown spots on the front, expanding into nearly round or irregular shape, 4mm~14mm in diameter, gray-white in the center, light brown concentric lines, dark brown margin slightly raised, and dense small black mildew spots in the disease spot. The spot passes through the back, but the color on the back is slightly lighter than that on the front. After the disease spot dried up, it split with the healthy part until the perforation was formed. Often cause early defoliation. Pathogenic fungus, half-known fungus, subphyllospora, cercosp
2019-01-15 -
Morphological characteristics of Euonymus tomentosa
Evergreen shrubs or small trees, to 5 m tall; branchlets subquadrangular. Leaf blade leathery, surface glossy, Obovate or narrowly elliptic, 3mur6cm long, 2MUE 3cm wide, apex pointed or obtuse, base cuneate, margin serrulate; petiole ca. 6mur12 mm. Flowers green-white, 4-numbered, 5-Mel 12 arranged in dense Cymes, axillary. Capsule subglobose, with 4 shallow grooves, ca. 1 cm in diam.; seeds brown, aril orange-red. The flowering period is from June to July, and the fruit ripening period is from September to October.
2019-01-15 -
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
2019-01-15 -
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, and there can be two kinds of disease spots on the same leaf.
2019-01-15 -
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.
2019-01-15 -
Cutting and Rapid Propagation of Euonymus tomentosa
Euonymus tomentosa is evergreen all the year round, strong adaptability, very resistant to pruning, is a good hedge material, easy to shape and anti-pollution, is one of the indispensable evergreen tree species for urban greening in northern China. Its seedling rapid propagation technology is particularly important, rapid propagation is mainly cuttage, tender wood cutting, the survival rate is more than 96%. 1. The nursery facilities and inserting bed are made of bricks and cement to form a seedbed with a height of about 20 centimeters and a width of 1 meter, with a matrix of 18 centimeters thick, with coarse sand 5 to 8 centimeters thick in the lower layer and fine sand in the upper layer. Set up a water pipe at a height of 50 cm from the bed
2019-01-15 -
Production and maintenance Management of Populus tomentosa Bonsai
Populus tomentosa alias: Holly spear, Zhenggi. Scientific name: BuxusmicrophyllaSieb.etZucc family: Populus tomentosa. Tree species characteristics: Populus tomentosa, also known as melon seeds, thousand-year-old dwarf, evergreen shrubs or small trees of the family Populus. The trunk is gray and smooth, with dense branches and four-angled branches. Leaves opposite, leathery, entire, elliptic or Obovate, apex rounded or retuse, surface bright green, abaxially yellowish green. Flowers clustered in leaf axils or branch ends, blooming from April to May, flowers yellowish green. Cucurbit fruit oval
2019-01-15 -
Modeling and maintenance of bonsai of Populus tomentosa
Euonymus tomentosa is an evergreen shrub or small tree of the Euonymus family, also known as Orthodox and Holly. Because its leaves are evergreen all the year round, it is also known as "holly" or "Daye holly". Populus tomentosa can be processed into straight dry type, oblique dry type, curved dry type, double dry type and other different forms of bonsai according to the stump shape. The seedling branches are soft and can be modeled from a small age, first banding the trunk, then the main branches and lateral branches, and pay attention to cutting off the excess branches in time. Because of its large leaves, small and medium-sized bonsai crowns mostly use chic self.
2019-01-15