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How to Prevent and Control Calyx Splitting in Carnations
In the cut-flower cultivation of carnations (also known as Dianthus caryophyllus or musk pink), a physiological disorder often occurs: calyx splitting. The physiological cause of calyx splitting is that the petals grow and quickly outpace the calyx, bursting it open, especially in large-flowered varieties with 60 or more petals. In addition, during the flowering stage, if continuous low temperatures occur, because the number of petals or flowers increases and the day-night temperature difference is large, calyx splitting occurs more often. Therefore, low temperatures, excessive watering or excessive fertilizer, especially excessive phosphorus, very easily cause calyx splitting. Methods to prevent calyx splitting:
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Key Techniques for Winter and Spring Cutting Propagation of Carnations
Carnations are generally propagated by cuttings, carried out in winter and spring, and can be done anytime from December to April of the following year. The lateral buds used as cuttings at this time grow robustly and are of the best quality. At the same time, cuttings taken during this period can control the plants to bloom at New Year's Day and the Spring Festival of the following year. First, the growing medium should be prepared, generally using garden soil mixed with 30%-40% rice husk ash or sandy soil, mixed evenly, then placed in cutting pots or wooden boxes. Cutting must be done in a greenhouse, selecting cuttings from mother plants that are vigorous in growth, uniform in flowering, and have thick, short-jointed branches.
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What is the fungal leaf spot disease of cut-flower carnations?
Symptoms: purple round spots 0.5-1.5 cm in diameter, surrounded by a yellow-green margin; the centers of the spots then turn brownish-gray and dry out, and finally the lesions enlarge, black spores appear, and the leaves begin to yellow and drop. Causes: watering from above the plant, poor ventilation, excessively high humidity at night, and overwatering and overfertilizing after planting are also among the causes of the disease. Control methods: keep the plants as dry as possible, preferably use drip irrigation, and maintain good ventilation. Use 1% Bordeaux mixture or 75% chlorothalonil wettable powder at 500 times dilution,
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How can cut-flower carnations be effectively protected against gray mold?
Symptoms: Elliptical, brown, large and wet spots first appear on the petals, then gray mold grows on them, and the petals and the whole flower rot as a result; the stems and flower buds can also be infected. Cause: Long-term exposure to low temperature and a humid environment. Control methods: Keep the plants as dry as possible, preferably using drip irrigation for fertilizer and water control; maintain good ventilation; spray 75% chlorothalonil at 500 times dilution, or carbendazim at 500 times dilution, alternating them, spraying once every 7 to 10 days; in the evening, a 10% procymidone
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How to cultivate carnations? Detailed explanation of planting methods and management key points
Carnation is also called musk carnation, and is also known as kangnaixin (carnation). It originated in southern Europe. It is a perennial herbaceous flower. Its leaves are opposite and linear. The branches are relatively long. The flowers are borne at the tips of the branches. The flowers may be single or double, and are fragrant; the colors include red, white, yellow, purple, and speckled gold, etc. Carnations can be propagated by cuttings, division, layering, or sowing. Cuttings are generally used, but although this method can preserve the characteristics of the variety, the propagation quantity is relatively small, and because the roots are shallow, lodging often occurs. Therefore, if the purpose is to produce cut flowers in large quantities, sowing is still better. The sowing time should be from Great Cold to the beginning of spring
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A Detailed Guide to Controlling the 3 Major Diseases of Carnations
Leaf spot, Fusarium wilt and viral diseases are the main diseases that occur on carnations. The control methods are as follows: Leaf spot mainly infects the leaves, and the disease usually starts on the lower leaves. On severely affected plants the diseased parts are distorted, and the diseased leaves wither, droop and hang down over the stem, but do not fall off. Old leaves are affected more often and more severely, while new leaves are affected less, and the disease occurs more in open-field cultivation than in greenhouses. Control methods: start spraying regularly from the early stage of the disease; spray a fungicide immediately after disbudding and cutting flowers for protection. A 75% chlorothalonil wettable powder solution diluted 800 to 1000 times can be used for spraying
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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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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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How much do you know about the basic facts of carnations?
Carnation, also known as Carnation (transliteration of the English word Caxnation) and musk carnation. It is a perennial herbaceous plant of the genus Dianthus in the family Caryophyllaceae, but it is usually cultivated as a biennial. The plant height is 60-100 cm, the stem is upright, the leaves are linear-lanceolate and opposite, the stems and leaves are elegant, and the flowers are beautiful with delicate colors. There are many flower colors, commonly including red, yellow, pink, white, purple, orange and various bicolor types. Because the flowers are beautiful and the colors are rich, their uses are extremely wide. The yield is high and the price is relatively cheap. The single-flower period is long, and it is cultivated in many countries around the world, along with roses, chrysanthemums, and gladioli
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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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