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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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What is Carnation latent virus disease? Let us get to know this disease
[Symptoms] On carnation (Dianthus caryophyllus), symptoms are rarely produced or not produced at all. Infection of carnation by Carnation latent virus alone is not serious, but when co-infected with Carnation vein mottle virus, severe mosaic occurs. [Pathogen] Carnation latent virus (CarnationlatentCaravirus, CLV). It belongs to the genus Carlavirus. The virus particles are straight or slightly curved filaments, 652nm x 12-13nm, and some have reported 620-690nm x 10-12nm
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What kind of disease is Carnation latent virus disease?
[Pathogen] Carnation latent virus (Carnationlatantvirus, CaLV), thermal death point 60-65°C. Survival in vitro at 20°C is 2-6 days. [Symptoms] After this virus infects carnation, it generally shows no symptoms, but it can significantly reduce plant growth and flower quality. When co-infected with Carnation vein mottle virus, it can produce mosaic. On indicator plants, it can form obvious chlorotic mosaic patterns. [Occurrence pattern and epidemic characteristics] The above virus
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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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What is Tobacco ringspot virus disease of Carnation?
(Tobacco ringspot virus disease of Carnation) [Symptoms] Mottling, mild mosaic and plant decline appear on the affected leaf areas. [Pathogen] Tobacco ringspot virus (Tobacco ringspot Nepovirus, TRSV). It belongs to the family Secoviridae, genus Nepovirus. The virus particles are spherical, about 28 nm in diameter. The virus mainly has 3 types of particles: empty shells without RNA (T), non-infectious nucleoprotein (M), infectious nucleoprotein (B), and a satellite-like particle (SL), with sedimentation coefficients of 535 (T), 915 (M), 1265 (B), and 1225 (SL), respectively. The satellite is 359 nt in size. The coat protein accounts for 60% of the particle weight, and the nucleic acid accounts for 40% of the particle weight; it is single-stranded RNA, and the genome consists of 2 types of RNA, namely RNA1 and RNA2, with molecular weights of 2.73 x 106 and 1.34 x 106, respectively. The RNA1 genome is 7514 nt. The sedimentation coefficients are 32S for RNA1 and 24S for RNA2. When diluted 1:5 with distilled water, the thermal inactivation point is 65 degC, the dilution end point is 0.001-0.0001, and the longevity in vitro is 6-10 d at room temperature, 3 weeks at 18 degC, loses infectivity after several months at 2 degC, and retains activity after 10 years of storage under sealed conditions as a frozen low-temperature liquid; leaves dried with calcium chloride remain infectious after storage at -10 degC for more than 1 year. TRSV has good immunogenicity, and antiserum with a titer above 1:2000 is easily obtained; it has no serological relationship with viruses of the same genus, such as Tomato ringspot virus and Arabis mosaic virus.
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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 Key Points of Disease Prevention Techniques in Mushroom Cultivation
In late September, mushrooms begin to fruit one after another, which is also the time when pathogenic fungi in the mushroom house begin to multiply and cause damage. Mushroom walnut-flesh fungus (Diehliomyces microsporus) is one of the more serious pathogens in mushroom production. This fungus is also called "false truffle," and its pathogen is Microsporon. When the ascocarps are piled up, they appear walnut-flesh or cauliflower shaped, light yellow to cream colored, turning light brown when old and mature. The surface is covered with a scale-like substance, and the fungal flesh is dense and soft, with a fishy odor after being crushed, and large ones can reach over 10 cm. Once the mushroom house beds are infected by walnut-flesh fungus, water spraying on the bed surface should be stopped immediately to dry the substrate soil surface,
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How to prevent and control non-physiological diseases of mushrooms?
(1) Deformed mushrooms Deformed mushrooms are mostly induced by temperature differences or unfavorable environments; they may also be related to the strain used. Deformities mainly include the following types: 1. Hollow stipe. Mushrooms on the bed look normal, but when the base is cut off, part of the stipe is found to be hollow, usually with a ring-shaped cavity around a hard core. Afterwards, the cut surface of the stipe may crack and then curl backward, causing the mushrooms to lose their appealing appearance and decline in quality. This is mainly caused by low air humidity during the fruiting period, rapid evaporation of water from the mushroom bodies, excessively dry casing soil, and the fruiting bodies being unable to obtain water.
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Symptom Identification and Control Methods for Mushroom Brown Blotch Disease
Mushroom brown blotch disease, also known as dry bubble disease, is fairly widespread and occurs frequently on mushroom beds, causing great damage. Symptoms: When the disease occurs, brown spots usually form on the stipe, cap, and gills, and become sunken; the mushrooms often lose their firmness and become deformed. In severe cases, the mushrooms rot. Diseased young mushrooms are mostly deformed, with the edge of the cap appearing serrated, or the stipe bending; some look like garlic bulbs, with the stipe thicker than the cap. When large mushrooms are affected, localized brown spots usually appear; the diseased mushrooms later dry out and become leathery, and a gray mold layer forms on the diseased parts. Unlike white rot disease, the diseased mushrooms rot
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