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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 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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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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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 are the two main diseases of carnations?
Carnations are most susceptible to leaf spot and stem wilt, and calyx rot. The fungal spores of leaf spot and stem wilt persist in carnation plants and in decayed, rotting plants, and spread through the air. When water remains on the plant surface for 8-10 consecutive hours, the pathogen can penetrate through the moisture. The symptoms of leaf spot and stem wilt are: grayish-brown leaves or spots with purple edges appearing on the petals. The spots are formed by clusters of black spores, and the stems begin to yellow and wither from the internodes, then develop into a wilt that encircles the stem completely. The pathogen of calyx rot persists in the old leaves, lower stems and branches, or decayed and rotting plants of carnations. High
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What kind of disease is carnation Fusarium wilt
Carnation Fusarium wilt occurs in all carnation-growing areas and causes widespread damage. [Pathogen]Fusarium oxysporum f. sp. dianthi (Prill. et Del.) Snyd. et Hans, a fungus belonging to the Deuteromycotina and the genus Fusarium. [Symptoms]The disease mainly invades through the roots of carnations and colonizes the vascular system. Affected plants show chlorosis, yellowing, browning and wilting of the lower leaves or stem internodes, initially usually only on one side of the plant;
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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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Symptom Identification and Control Methods of Carnation Viral Diseases
Carnation viral disease is a worldwide disease, occurring in all cultivation regions. The common viral diseases are vein mottle disease, necrotic spot disease, etched ring disease, and latent disease. Viruses often cause carnations to grow weakly, with short flower stems, smaller flowers, mottled petals, and split calyces, severely affecting the quality and yield of cut flowers. (1) Carnation necrotic spot disease: the middle leaves of infected plants turn grayish-white, showing pale yellow necrotic mottling, or irregularly shaped streaks or stripes. The lower leaves often show purplish-red streaks or stripes. As the plant
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Symptoms and Control Methods of Carnation Vein Mottle Disease
[Pathogen] Carnation vein mottle virus (CaVMV). Thermal inactivation point 60-65°C. [Symptoms] Affected plants show numerous chlorotic spots and mottling on the leaves, presenting systemic mosaic symptoms; dark green spots are especially visible on the veins of young leaves, and symptoms are often masked on old leaves in winter. Affected flowers develop color breaking and are sometimes distorted and deformed.
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What to Do When Carnations Get a Viral Disease? Detailed Control Measures
A. Strict quarantine should be carried out when importing carnation seedlings to avoid the spread of virus-carrying plants. B. Large-scale production bases should use shoot-tip virus-free seedlings to establish virus-free mother plant gardens for cutting propagation. C. Remove infected plants as much as possible to reduce sources of infection. During cultivation and management, care should be taken to disinfect and clean tools used for taking cuttings, cutting flowers and pruning, to avoid contact transmission. D. Pay attention to controlling the transmission vector, aphids. Spray 50% menazon wettable powder at 1500 times dilution or 2.5% deltamethrin emulsifiable concentrate at 5000 times dilution to kill aphids. E. Heat treatment
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