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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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What are the morphological characteristics of Euonymus japonicus (Japanese spindle)?
Evergreen shrub or small tree, up to 5 m tall; branchlets nearly four-angled. Leaves leathery, glossy on the surface, obovate or narrowly elliptic, 3-6 cm long, 2-3 cm wide, apex acute or obtuse, base cuneate, margins finely serrate; petiole about 6-12 mm long. Flowers greenish-white, in 4s, 5-12 arranged in dense cymes, axillary. Capsule nearly spherical, with 4 shallow grooves, about 1 cm in diameter; seeds brown, aril orange-red. Flowering period June-July, fruit ripening period September-October.
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Key Techniques for Rapid Autumn Propagation of Japanese Spindle (Euonymus japonicus)
Japanese spindle (Euonymus japonicus) is an evergreen shrub of the Celastraceae family, with dark green, glossy leaves. It is often used as a hedge in landscaping, and the demand for it in greening projects increases year by year. Because most of North China experiences drought and high temperatures in spring and summer and severe cold in winter, conditions are unfavorable for propagating and raising Japanese spindle. Over many years, the author has repeatedly experimented with rapid autumn propagation techniques, achieving autumn propagation, spring transplanting the following year, and producing marketable saplings in a single year, creating relatively good economic returns. The experience is described below: 1. Cuttings are best taken from late August to early October, preferably in mid-to-late September.
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Harvesting and Fresh-keeping Methods for Cut Leaves of Japanese Spindle
[Other Chinese Names] Yagi, Dongqing Weimao, Fufangshu, Haiweimao, Huangzhualongshu, Jiaweimao, Maixiang, Japanese Euonymus, Sijiqing, Zhengmu [Family and Genus] Celastraceae, Euonymus [Place of Origin] Japan, China [Plant Characteristics] Japanese spindle is an evergreen shrub or small tree. The plant height can reach 8 m. The branchlets are green. The simple leaves are opposite, obovate or narrowly oblong, 3-6 cm long, with an acute or obtuse apex, a broad wedge-shaped base, and finely blunt-toothed margins, smooth, leathery. [Cut Leaf Harvesting] Harvested part
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Potato spindle tuber disease
[Virus English name] Potato spindle tuber viroid [Host crops] Potato, tomato, etc. [Disease diagnosis] Diseased plants have upright stems with very few branches. Leaves are held upright, and the angle between the petiole and the stem becomes smaller; leaf margins are wavy or curl upward, and leaves are stiff and brittle with a dark green color; leaves become smaller and curl into a half-closed, twisted shape. At the bud stage, plant growth is noticeably delayed, leaf color becomes lighter and sometimes yellowed, and severely diseased plants are stunted. Tubers are elongated, or one end is more pointed, forming a spindle shape, with
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Is Chiyoda-no-matsu a succulent in the Crassulaceae family?
Chiyoda-no-matsu is a small succulent in the Crassulaceae family, genus Pachyphytum, also called a succulent plant, native to the state of Hidalgo in Mexico. The leaves of Chiyoda-no-matsu resemble spindles and are very cute. Currently there are very few species in this genus, so as one of the representative species of the genus it should be collected and cultivated. The veins on the leaves are inherent, making it a rare leaf
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