Prevent the calyx of carnation from breaking
In the cut flower cultivation of carnation (also known as carnation and carnation), a physiological disease-calyx rupture often occurs. The physiological cause of calyx rupture is the growth of petals, which quickly exceeds that of sweet potatoes and breaks the calyx, especially in large rotation with more than 60 petals. In addition, in the flowering stage, calyx cracks often occur due to the increase in the number of petals or flowers and the large temperature difference between day and night. Therefore, low temperature, too much watering or too much fertilizer, especially too much phosphorus, can easily cause calyx rupture.
Ways to prevent calyx cleft:
First, increase the temperature of the cultivation room at night, fully ventilate during the day, reduce the temperature difference between day and night, and water properly to avoid dryness and dryness.
2. Within 2 weeks of flowering, wrap a plastic belt around the calyx into a bowl, or install an iron wire ring
Third, treat soybean-sized buds with 30-50PPM gibberellin.
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Control of Sclerotinia sclerotiorum stem blight of carnation
It mainly affected the root and neck of the plant and dried up and died quickly after infection. The pathogen infected the root neck of the seedlings near the soil surface, and brown or dark brown spots appeared at the initial stage, and gradually spread to the periphery. The base of the seedlings rotted and constricted, resulting in lodging. The seedlings with more aging stem base were damaged, and the cortex of the near soil surface was rotten and sticky. The leaves of the diseased plant were pale and drooping, and finally the whole plant withered and died. Control methods: (1) flowerpots and soil should be disinfected before cutting. (2) the plant should be planted in the high seedling bed, and the watering should be controlled so as not to make the basin soil too wet. (3) Disinfection
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Cutting carnation in winter and spring
Carnation is generally propagated by cuttage, which is carried out in winter and spring and can be carried out from December to April of the following year. At this time, the lateral buds used as cuttings grow strongly and have the best quality. At the same time, cutting during this period can control the flowering of plants in the second year New Year's Day and the Spring Festival. First of all, the culture soil should be prepared, and the garden soil should be mixed with 30%-40% rice bran ash or sandy soil. after mixing evenly, it should be put into a basin or wooden box. The cuttings should be carried out in the greenhouse, and the cuttings should be selected from the mother plants with strong growth, neat flowering and thick nodes and short branches.
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