How to manage water-saving and drought-tolerant plant Populus tomentosa in Hokkaido
Hokkaido boxwood is a small evergreen broad-leaved tree of the genus Euonymaceae. Hokkaido boxwood is grafted with silk cotton as rootstock, the tree posture is tall and straight, evergreen all the year round, and the ripe fruit is cracked after winter, showing red aril, green leaves and red fruit, which is of high ornamental value. It is a rare evergreen broad-leaved tree in the cold region of the north.
Lax requirements on the soil, in the soil organic matter content of more than 0.8% of sandy soil, sandy loam, loam, soil can grow well. It is suitable for soils with pH 6 to 9 and total salt content less than 2 ‰. The high connection height is 1 to 1.8 meters and the low connection height is 30 to 50 centimeters. The row spacing of street trees is 3 to 6 meters, and the row spacing of color block seedlings is 20 to 30 centimeters, 15 to 25 trees per square meter.
Before planting, 2 to 3 kg of rotten basic fertilizer was applied to each plant, irrigated 3 to 4 times a year in areas with rainfall of 180 to 400 mm, and 2 to 3 times a year in areas with rainfall greater than 400 mm. Hokkaido boxwood is resistant to pruning, so it is necessary to top the strong branches at the right time, increase the number of branches and make the tree full.
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How to distinguish between Euonymus tomentosa and Jiaodong Euonymus
Euonymus tomentosa and Euphorbia angustifolia are evergreen plants of the same genus and different species, and both are good materials for hedgerows. Their leaves are leathery and have no obvious difference in leaf shape, so many people confuse them with each other. The main differences between the two are as follows: first, the plant shape of Euonymus tomentosa is compact, the branch is erect, and the natural branching point of lateral branch is higher; the plant shape of Jiaodong Euonymus is loose, the natural branching point of lateral branch is low, and the base branch is creeping and can take root. 2. although the leaves of both leaves are leathery, the leaf margin of Euonymus tomentosa is more serrulate.
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How to control 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: in the early stage 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. In the later stage, the lesions are grayish brown or grayish white, with dark edges, and there are many small black spots on the disease spots. In severe cases, the disease spots are linked together.
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