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Why is Taoyuan Large-leaf Tea so popular among tea farmers?
At the Hunan Provincial Tea Work Conference held on March 26-27, participants frequently mentioned a distinctive tea variety - Taoyuan Large-leaf. It is understood that "Taoyuan Large-leaf" evolved from wild large-leaf tea in the deep mountains of Lujiachong, Taipingpu Township, Taoyuan County. In 1969, senior agronomist Lu Wanjun and others carried out selection, breeding and experimental demonstration of wild large-leaf tea. The selected variety passed scientific and technological achievement appraisal in 1989 and passed the approval of the Hunan Provincial Crop Variety Approval Committee in 1992.
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Technique for Rapidly Cultivating Ball-and-Stem Shaped Nursery Stock of Large-leaf Euonymus through Long-branch Cuttings
Large-leaf euonymus, also known as evergreen euonymus, is an evergreen shrub or small tree of the Celastraceae family. It generally grows 60-90 cm tall, and can reach up to 3 m. Large-leaf euonymus has dense branches and leaves, glossy young foliage, stays green through all four seasons, and is fresh and elegant, making it much loved as a common foliage ornamental plant. Large-leaf euonymus is native to Japan, and is now widely cultivated across the northern and southern provinces of China. It likes light and tolerates shade, and is suited to growing in warm, humid climates and loose, fertile sandy loam; it is also fairly cold-tolerant, and except for non-lignified new shoots sometimes suffering frost damage in winter, it can generally overwinter safely even when planted in the open in northern regions.
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What are the leaf propagation methods for Japanese euonymus (Euonymus japonicus)?
Propagating Japanese euonymus (Euonymus japonicus) from leaves can solve the problem of insufficient propagation material. The specific method is as follows: 1. Cutting time and leaf selection. The best time for cutting is in mid-to-late April, when the temperature is stable at around 20°C. In a greenhouse it can be done year-round. Choose old leaves that are more than one year old; leaves removed when taking cuttings can also be used. The leaves should be picked off by hand, taking care to include a heel; do not cut the leaves off with scissors. 2. Medium and cutting bed. The medium is best made of coarse river sand; a half-and-half mix of peat soil and perlite is also acceptable, as long as the principle is water retention and aeration without waterlogging
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What to Do When Wheat Seedlings Show Abnormal Leaf Color? A Full Analysis of Causes and Solutions
After wheat is sown and the seedlings emerge, various abnormal discolored seedlings often form due to the influence of natural conditions and cultivation practices. To make it easier to manage according to the specific seedling condition and the specific cause, they are introduced separately below: Yellow-leaf seedlings - the causes of yellowing of wheat leaves. First, soil drought. This situation mostly occurs in wheat fields with insufficient subsoil moisture or where moisture escapes through cracks. Its characteristics are: tillers emerge slowly, leaf color is grayish green, the central leaf is short and small, growth is slow or stagnant (people call this "shrunken-heart seedlings"), the middle and lower leaves gradually turn yellow and dry up, and roots are few and fine. Management
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A Detailed Guide to Managing Wheat Seedlings Before Winter by Leaf Color
1. Causes of yellow leaves in wheat seedlings and their management. First, soil drought, which mostly occurs in wheat fields with insufficient subsoil moisture or where moisture escapes through cracks in the soil. Its characteristics are slow tiller emergence, grayish-green leaf color, short and small heart leaves, slow or stalled growth (known as "shriveled-heart seedlings"), gradual yellowing and drying of the middle and lower leaves, and few, thin roots. The key management point is to apply 15 kg of ammonium bicarbonate per mu along with irrigation. Second, nitrogen deficiency, in which seedlings are thin and weak and grow upright, tillering is reduced, leaves are narrow and short, and the lower leaves gradually turn yellow and dry starting from the leaf tips and progressing upward. The key management point is to use urea per mu
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What are the key points of mulberry leaf feeding techniques in young silkworm co-rearing?
In the process of young silkworm co-rearing, mastering feeding techniques and ensuring proper nutrition is the key to ensuring young silkworms develop robustly and uniformly. Carefully select mulberry leaves according to the leaf standards for each instar, selecting in the field and selecting on the tree. Choose non-toxic, pollution-free, insect-free, appropriately mature leaves from the upper new shoots. Before leaf preparation, perform a second careful selection, removing leaves that are too old, too tender, wilted, or secondarily contaminated and thus below standard. Planned preparation and storage of leaves for young silkworms During leaf preparation and storage, keeping mulberry leaves fresh and with sufficient moisture is very important. Low-temperature running-water leaf storage
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What are the symptoms of leaf spot disease on Japanese euonymus?
Symptoms of leaf spot disease on Japanese euonymus: the disease occurs on new leaves, producing small yellow spots that later expand into irregular large spots up to 1.5 mm; the edges of the spots are raised, with a relatively wide brown margin, and beyond the raised edge there is an extended yellow halo. The center is yellowish-brown or grayish-brown and densely covered with small black dots. These are the stroma of the pathogen; under a magnifying glass, the dots appear as black downy tufts. In severe cases, the leaves drop off within the same year.
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How to deal with leaf spot disease on Euonymus japonicus? Detailed explanation of prevention and control methods
Euonymus japonicus is a commonly used evergreen small shrub grown for its foliage in landscaping, and it has many advantages, but the occurrence of leaf spot disease causes the plant to drop its leaves prematurely, resulting in bare branches and even death, seriously affecting the normal growth and ornamental effect of Euonymus japonicus. Symptoms of leaf spot disease: In the early stage of the disease, there are small yellow spots on the leaves, which gradually turn yellowish-brown and expand into round or irregular spots. The diameter of the spots is 2 mm to 10 mm. In the later stage, the spots are grayish-brown or grayish-white with darker edges, and many small black dots grow on the spots.
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Symptom Identification and Control Methods for Leaf Spot Disease on Japanese Spindle (Euonymus japonicus)
Symptoms: The disease affects the young and old leaves of Japanese spindle (Euonymus japonicus). Yellow-brown spots appear on the upper surface of the leaves and expand into nearly circular or irregular shapes, 4 mm to 14 mm in diameter, with a grayish-white center, light brown concentric rings, and a dark brown slightly raised edge. Dense tiny black mold dots form within the lesions. The spots show through to the underside, though the color on the underside is slightly lighter than on the upper surface. After the lesions dry up, they crack apart from the healthy tissue, eventually forming holes. This often causes early leaf drop. Pathogen: fungus, Cercospora destructiva Rav. of the order Moniliales, class Hyphomycetes, subdivision Deuteromycotina.
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How to prevent and control anthracnose and leaf spot on Japanese euonymus?
Japanese euonymus is commonly used as a hedge in gardens. It is drought-tolerant and tolerates pruning well, and has strong resistance to various toxic gases and smoke and dust. However, the occurrence of anthracnose and leaf spot causes the plants to drop leaves prematurely, or even die, seriously affecting the ornamental effect of Japanese euonymus. The two diseases often occur together, with two types of lesions on the same leaf, but they can be prevented and controlled together. 1. Anthracnose 1. Symptoms The disease occurs on leaves and young shoots. Leaf lesions are elliptical or round, about 3 to 12 mm in diameter. The lesion margins have a relatively narrow dark brown raised edge, with a grayish-white center.
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