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Symptom Identification and Control Methods of Carnation Necrotic Fleck Disease
[Pathogen] Carnation necrotic fleck virus (Carnationnecroticfiackvirus, CaNFU), thermal death point 40-45°C, in vitro survival period 2-4 days at 20°C. [Symptoms] Grayish-white, pale yellow, or purplish-red necrotic spots or streaks appear on the leaves, and the streaks are often parallel to the leaf veins. Older leaves are more severely affected, and the disease spreads upward. In severe cases, the entire leaf turns yellow and necrotic.
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Symptoms and Control Methods of Gray Mold in Carnations
[Introduction] This disease is a common disease of carnations grown in greenhouses and plastic tunnels. It can cause brown spots on petals or cause petals to rot, seriously affecting the quality of cut flowers. [Symptoms] Gray mold in carnations mainly begins at the edges of petals, where light brown water-soaked spots appear, after which several petals become entangled together by the growth of gray fungus. If the environment is humid, the petals rot and bear gray mold. When flower buds are affected, there are irregular water-soaked spots, which become soft and rot, and gray mold also develops.
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How to prevent and control gray mold in carnations? These methods are very practical
Carnation gray mold, also known as carnation flower blight, is a common disease of carnations grown in greenhouses and plastic tunnels. The disease damages the petals of the plant, causing brown spots and rot on the petals, and seriously affects the quality of cut flowers. Symptoms: The disease mainly occurs on petals and flower buds, and occasionally stems and leaves are also affected. In the early stage of the disease, affected flowers begin to show light brown water-soaked areas from the petal edges, and then several petals become tangled together by gray fungal growth. In the later stage of the disease, if the environment is humid, the petals rot, and a gray
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Symptoms and Control Methods of Carnation Vein Mottle Virus Disease
[Symptoms] Systemic mosaic, vein mottling, symptoms masked in old leaves in winter. Flower color breaking, especially severe petal color breaking in red varieties. [Pathogen] Carnation vein mottle potyvirus (CaVMV). Particles are filamentous, 790nm×18-19nm, also reported as 600-710nm×13nm. Sedimentation coefficient approximately 144S. A260/280=1.15. Antiserum tests
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Detailed Guide to Carnation Cutting Propagation Methods and Techniques
For carnation cutting propagation, from September to March, cut healthy, slightly hardened side shoots 6 to 9 cm long from the middle of the plant and use them for cuttings. Keep the room temperature at 10°C to 13°C; roots form in about 20 days. In terms of care, apply more fertilizer during the seedling stage, and pinch off the growing tip when the seedlings are 1.5 cm tall, so that they will branch more and bloom profusely. When flowering, keep the terminal flower buds and remove the axillary flower buds. In summer, water frequently, mist the leaves once a day, avoid strong direct sunlight, and ensure good air circulation. In winter, place it indoors or in a hot
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Symptoms and Control Methods of Carnation Etched Ring Disease
[Pathogen] Carnation etched ring virus (CaERV), thermal death point 80-85°C. Survival in vitro 140 days. [Symptoms] Ring-shaped or broad linear necrotic spots appear on the leaves, more obvious on seedlings. In severe cases, the necrotic spots join together and the leaves twist and curl.
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Symptom Identification and Control Methods for Carnation Rust
[Pathogen] Uromyces caryophyllinus (Schrank) Wint., belonging to the fungal subphylum Basidiomycotina, genus Uromyces. It is a heteroecious rust fungus. [Symptoms] The disease mainly damages leaves, and also damages stems and calyx. The affected parts initially show pale small raised spots, which later turn yellow around the edges. In severe cases, leaves and stems become distorted. During the growing season, brown small powdery masses appear on the underside of infected leaves or on stems and calyx lobes; these are the uredinia of the pathogen. In autumn and winter
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Symptoms and Control Methods of Carnation Leaf Spot Disease
There are many types of pests and diseases that harm carnations, and unsuitable cultivation environments and management mistakes can both aggravate pests and diseases. Carnation leaf spot disease, also known as carnation white star disease, can harm many flowers of the Caryophyllaceae family. [Pathogen] Septoria dianthi Desm., belonging to the fungi Deuteromycotina, genus Septoria. [Symptoms] The disease harms leaves and stems. Nearly round small spots form on leaves and stems, with a diameter of about 5 mm; the spots are light brown with purple edges,
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What are the methods for controlling Phytophthora disease in carnations?
Symptoms The stems and roots are affected. When infected at the seedling stage, it causes root rot and the plants die. After planting out, the main stem and branches become infected; the affected areas appear water-soaked and turn grayish-white when dry, and the stems and leaves above the affected area wither. The pathogen Phytophthora nicotianae Breda is called tobacco Phytophthora and belongs to the fungal subdivision Mastigomycotina. The sporangiophores emerge from the stomata and measure 10-744 microns long; the sporangia are borne singly, long elliptical or oval, measuring 28.8-67.5 x 12.5-30 mic
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Detailed Explanation of Carnation Seedling Cultivation Methods and Technical Key Points
Propagation Methods For carnation cut flower production, seedlings can be propagated by cuttings, layering, tissue culture, and other methods, usually with cuttings as the main method. Cuttings can be taken at any time except in the heat of summer, but in production it is best to do so from January to March, especially from late January to early February, when the results are best and the survival rate is highest. Morning, evening, or cloudy days are best for taking cuttings. Through cultivar cultivation trials, select lateral buds (i.e., the 3rd and 4th buds) from robust, high-quality mother plants as cuttings. Take them when the terminal bud is 1 cm in diameter, pulling downward along the stem so
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