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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 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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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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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 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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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 Carnation Wilt
[Symptoms] The external symptoms of this disease are very similar to those of Fusarium wilt. The leaves of affected plants turn grayish-green, then yellow, and dieback of the shoot tips occurs. The stems split, causing the plants to wilt and die. When the central column (stele) is examined, yellow to light brown stripes can be seen. While the aboveground parts are affected, the roots also disintegrate accordingly. The onset of the disease can be divided into two types: the acute type develops very rapidly, and is especially pronounced when young plants in hotbeds are affected; when the damage is mild, the leaves appear twisted. [Pathogen] Pseudomonas caryophylli
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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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Identification and Control Methods for Southern Blight in Carnations
[Distribution]Shanghai, Hangzhou. [Symptoms]The disease occurs at the base of the stem near the soil surface, turning brown and rotting; when the diseased stem tissue is cut open, a tea-brown or dark brown rot develops from the outside toward the center; the xylem also discolors upward, and white mycelium growing in a feathery, radiating pattern can spread to the surrounding soil surface; afterward, on the diseased area and the surrounding soil surface mycelium, sclerotia form that are initially white and later turn yellow-brown, the size of rapeseeds; after a plant is infected, it usually collapses and dies as a whole. On cutting beds, wet rot begins at the callus formation area of the cuttings and can also cause severe root
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