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How to grow a large-leaf boxwood bonsai? Detailed explanation of shaping and care key points
Large-leaf boxwood is an evergreen shrub or small tree of the genus Euonymus in the family Celastraceae, also known as Zhengmu and evergreen euonymus. Because its leaves stay green all year round, it is also called "evergreen" or "large-leaf evergreen". Large-leaf boxwood can be processed into different bonsai forms such as straight-trunk style, slanting-trunk style, curved-trunk style, and double-trunk style according to the shape of the stump. The branches of young seedlings are soft and can be shaped from a young age. First wire the main trunk, then the main branches and side branches, and pay attention to promptly pruning excess branches. Because its leaves are relatively large, the crowns of small and medium-sized bonsai mostly use an elegant natural
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What tree is the large-leaf red-flowered black locust? An introduction to its cultivar characteristics
The large-leaf red-flowered black locust is a multi-purpose black locust cultivar bred in Germany. In 1999, Professor Yang Minsheng of Hebei Agricultural University introduced it to China from the Institute of Forest Genetics and Forest Tree Breeding in Germany. After nearly 5 years of introduction trials and demonstration planting, it was proven that the large-leaf red-flowered black locust has strong adaptability, can grow normally in the suitable areas for black locust in North China, and has shown very high economic value. The large-leaf red-flowered black locust has a fast growth rate, with a diameter at breast height reaching 9.5 cm at 3 years old; a large leaf yield, with pinnate leaves 45-60 cm long, longer than tetraploid black locust
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Symptoms, Identification and Control Methods of Pinellia Leaf Spot
It occurs in early summer. Purple-brown spots appear on diseased leaves, and later many small black dots form on the lesions. In severe cases, the lesions cover the entire leaf, causing the leaves to curl, scorch and die. Control methods: In the early stage of the disease, spray 1:1:120 Bordeaux mixture or 65% zineb 500-fold solution, once every 7-10 days, for 2-3 consecutive applications.
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Identification and Control Methods of the Tea Leaf-tier Moth
One of the boring pests of tea branches and trunks, also known as the tea branch sickle moth and tea stem borer, belonging to the order Lepidoptera, family Yponomeutidae (leaf-tier moths), with the scientific name Casmarapatrana Meyrick. It is distributed in all tea-producing provinces of China. Morphology: The adult has tea-brown body and wings, with a body length of 15-20mm and a wingspan of 32-40mm. The forewings are nearly rectangular, with a grayish-black outer margin, a large earth-yellow patch on the inner side, and a small red protruding spot near the center of the wing base. The egg is horseshoe-shaped, about 1mm long, and pale cream-yellow. The larva is slender, with a yellowish-white and slightly
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Control Methods and Technical Key Points for the Tea Green Leafhopper (Empoasca flavescens)
The tea green leafhopper, also known as the small green leafhopper, is one of the most important insect pests of tea in Fujian Province. It mainly feeds by piercing and sucking the sap of tender tea shoots with adults and nymphs, and female adults lay eggs inside the stems of tender shoots, causing stunted growth of tea plants. The damaged buds and leaves curl and harden, and the leaf tips and margins become reddish-brown and scorched, affecting the yield and quality of tea. This pest has multiple generations per year in Fujian Province, with overlapping generations. In low-mountain tea areas, it has 12 to 13 generations per year, with peak damage periods in May to June and September to October; in high-mountain tea areas, it has 8
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How to prevent and control barley yellow leaf disease? Detailed explanation of occurrence and control measures
In recent years, barley yellow leaf disease has become increasingly serious in the northern Jiangsu region, often leading to reduced yield and quality, and in some areas even severe seedling death, forcing plowing and replanting. From 1992 to 1995, the author conducted organized surveys of 1466.7-1866.7 hectares of two-row barley planted in the coastal reclamation area of northern Jiangsu and carried out trials of planting disease-resistant varieties, analyzing the relationship between the occurrence and spread of yellow leaf disease and factors such as variety, sowing date, tillage and cultivation, and climate. The report is as follows: 1 Main factors affecting the occurrence of barley yellow leaf disease
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What to Do About Golden Privet Leaf Drop During the Growing Season? Causes and Control Methods
Causes and Control Measures for Leaf Drop of Golden Privet During the Growing Season Caused by Disease According to expert research, this leaf spot disease is caused by the pathogenic fungus Alternaria (afternaria) of the order Moniliales, class Hyphomycetes, subdivision Deuteromycotina. In the early stage, small brown spots appear on the leaves, surrounded by purplish-red halos, and black mold-like growth is visible on the spots.
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Why do spider plant leaf tips turn brown and black?
Why do the leaf tips of potted spider plants (Chlorophytum comosum) turn black, dry up and shrivel? How can this be prevented? When potted spider plants show withered, blackened leaf tips, from a cultivation standpoint there may be the following causes. First, dry air, overly intense sunlight and excessively high temperatures. This situation mainly occurs in summer and autumn, because spider plants like to grow in humid, semi-shaded environments; once the air is too dry, the sunlight is unobstructed, and on top of that the temperature rises above 30°C, it is very easy to cause the leaf
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Golden Locust is an excellent colored-leaf tree species
Robinia pseudoacacia 'Frisia', of the Fabaceae family, genus Robinia, is a broadleaf deciduous tree. The twigs are thorny, with pinnate compound leaves; the foliage is golden yellow in spring, turning yellow-green in summer and orange-yellow in autumn, with rich and extremely beautiful color changes. It blooms in early summer, with white flowers. Native to northern America, it loves sunlight, tolerates slight shade when young, and can adapt to acidic, calcareous and alkaline soils; it has a shallow root system, is not tolerant of waterlogging, and grows rapidly. It is suitable for growing in the Three-North region. It is suitable as a specimen landscape tree and
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Are triploid large-leaf black locust and large-leaf fast-growing locust the same variety?
1. The tetraploid large-leaf black locust is an excellent variety selected through years of dedicated research and experimental comparison from among several superior polyploid black locust clones introduced from abroad. The tetraploid large-leaf black locust is an artificially induced tetraploid plant, with the characteristics of fast growth, large leaves and high biomass. Its leaf width is more than 2 times that of the common black locust, and its compound leaf dry weight, single leaf dry weight and total leaf dry weight are each 1.5 times or more than those of the common black locust. Compared with the common black locust, the tetraploid large-leaf black locust has a denser crown, thicker branches and a stronger photosynthetic capacity.
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