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In ginkgo tree cultivation, what is ginkgo stem rot?
What is ginkgo stem rot? What harm does ginkgo stem rot cause? At what tree age does ginkgo stem rot mainly occur? How is ginkgo stem rot prevented and controlled? Please give an introduction. Ginkgo stem rot mainly occurs in seedling-raising areas, generally in 1- to 2-year-old ginkgo seedling trees grown from seed, and is especially severe in one-year-old seedlings, often causing large numbers of seedlings to...
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Detailed Explanation of the Cultivation Methods and Technical Key Points for Single-Stem Chrysanthemums
Golden autumn is the season for admiring chrysanthemums, and among ornamental chrysanthemums, single-stem chrysanthemums are the finest. To cultivate single-stem chrysanthemums, the following steps must be done well: Select a plant with excellent flower shape, flower color, and plant form, as well as a vigorous plant that has already flowered, as the mother plant, and strengthen the care of the old roots. To ensure the health of the next generation of cuttings, spray 500-800 times diluted chlorothalonil or carbendazim once every 2 weeks before harvesting cuttings. Take vigorous young shoots from the second or third generation as cuttings. Cuttings are best taken from late May to mid-to-late June. Choose a seedling pot or an eggshell clay pot as the
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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 control methods for stem rot in Japanese euonymus?
Rot is a major disease that Japanese euonymus is prone to, and in severe cases it can cause the entire plant to die. Affected by the special climate of winter and spring, Japanese euonymus does not green up well, and some dead branches appear, weakening the growth vigor of the euonymus and thereby reducing the plant's disease resistance. Some Japanese euonymus is prone to stem rot. One- and two-year-old branches are especially the most severely affected: in the early stage the stem turns brown, the leaves lose their green color, the tender shoots droop, and the leaves do not fall off; in the later stage the affected part of the stem turns black, the cortex shrinks, the inner bark tissue rots, and many tiny black
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How to prevent and treat stem rot in Impatiens?
Impatiens stem rot is also known as Impatiens southern blight. [Pathogen] Sclerotium rolfsii Sacc., a fungus belonging to the genus Sclerotium, subdivision Deuteromycotina. [Symptoms] Brown water-soaked lesions appear at the base of the stem of affected plants, followed by a white silky mycelial layer. In the later stage, sclerotia the size of rapeseed grains can be seen on the rotted cortex at the stem base. [Disease pattern] The pathogen overwinters in diseased plant residues or in the soil, and can be spread by diseased soil, diseased seedlings, or water flow.
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How to prevent and control stem soft rot in lilies?
This disease occurs during the storage and transport of lily bulbs. Symptoms: In the early stage of infection, the affected scales develop water-soaked spots, which later turn dark brown, and the bulb softens and rots. In the late stage, a thick mold layer grows on the surface of the lesions, and within the mold layer many sporangia are produced that are initially white and later turn black. Pathogen: The pathogens are Rhizopus stolonifer (Ehrenb. ex Fr.) Vuill. and Rhizopus nigricans Ehrenb.
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Control Methods for Rhizoctonia Stem Rot of Carnation
It mainly attacks the root crown area of the plant, and infected plants dry up and die quickly. The pathogen infects the root crown of seedlings near the soil surface, initially causing brown or dark brown spots that gradually spread to the surrounding area. The base of the seedling rots and constricts, causing lodging. When older seedlings at the stem base are affected, the cortex near the soil surface rots and becomes slimy. The leaves of diseased plants turn pale white, wilt and droop, and finally the whole plant dies. Control methods: (1) Before cuttings are taken, flower pots and soil must be disinfected. (2) Plants should be grown on raised beds, and watering should be controlled so that the potting soil does not become too wet. (3) Disinfection
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Symptoms and Control Methods of Black Stem Rot in Geraniums
Black stem rot of geranium is a disease that occurs on the stems of geraniums, causing the stems to rot and even the whole plant to wither and die. Symptoms: The disease occurs on both cuttings and mature plants. Infected cuttings begin to rot from the base of the stem, and the rot gradually spreads upward, eventually leading to death. After mature plants are infected, the diseased part turns black and rots, gradually spreading upward, and eventually the leaves fall off. In severe cases, the diseased part girdles the stem, causing the plant to die. Pathogen: The pathogen is Pythium splendens
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Control methods for stem-boring pests damaging cherry blossoms
The stem-boring pests that damage cherry blossoms include longhorn beetles and the coffee wood moth (Zeuzera coffeeae). Their control methods are: 1. Longhorn beetles. The longhorn beetles that damage cherry blossoms usually include the citrus longhorn beetle (Anoplophora chinensis), the glossy green longhorn beetle (Anoplophora glabripennis), and the peach red-necked longhorn beetle (Aromia bungii). ① Citrus longhorn beetle. One generation occurs per year. When adults emerge from late May to early June, capture the adults: before laying eggs, the citrus longhorn beetle adult first bites a notch about 2 mm deep and about 8 mm long in the bark in the shape of the Chinese character "eight" or "ding", then lays eggs inside it. During the peak egg-laying period in mid-to-late July, search for the notches on the trunk and crush the eggs.
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Why are the tulip stems short and the flowers small?
For tulips grown at home, the quality is not as good as those sold at flower markets, usually shown as short stems and small flowers. The main reasons: first, varieties with different genetic backgrounds differ greatly in flower stem length and flower diameter; second, 2 to 3 consecutive years of cultivation causes variety degeneration, because the cultivation environment differs greatly from the ecological conditions of the tulip's place of origin, especially factors such as excessively high summer temperatures and unreasonable fertilization during the growing period, which easily cause bulb degeneration; generally, commercial bulbs can only be planted for 1 to 2 years without corresponding rejuvenation measures; third, bulb storage
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