Why do the lotus leaves withered? Did you enter the dormant period? Is it a lotus blight? What is the difference between lotus blight and lotus rot disease? How to maintain and manage lotus flowers without dead leaves and green leaves? Is it cut off? Is winter stored in the greenhouse? How to prevent pests and diseases? After the greenhouse is preserved, how should the depth of the water level be controlled?
Kang Lianping, Beijing Beihai Park, answered: I have summarized the following questions in three aspects. 1. Long-term daily management of lotus seeds should pay attention to matters. Potted lotus flowers in Beijing are generally planted in the middle of April to mid-April. When the soil is planted, the first time the water must be poured, and then the soil can be dried for a few days and then watered, which can promote rooting. Keep the soil moist in the early stage. After 7 to 10 days, water can be watered from 1 cm to 2 cm deep. The floating leaves grow and the leaves expand. As the temperature rises, the water level can be gradually deepened until the basin is full.
Lotus light, hi-fer, hi-friendly environment. Therefore, its conservation site must be well lit, at least for 6 hours of direct sunlight every day. The lotus flower pots should be placed at a distance of at least 20 cm, which is convenient for ventilation, light transmission and vertical leaf growth.
Lotus fertilizer, in addition to the base fertilizer when planting, in the growing season to properly topdress. Generally, before the leaves are grown and the flower buds are not released, the application is carried out once, and the compound fertilizer is mainly used. The ternary composite granular fertilizer, the compound fertilizer tablet or the raw bean cake can be applied, and the package is applied into the center of the basin. 2 places can also be applied directly. Observe its effect, generally effective after three days, pay attention to thin fertilizer, such as leaves yellow or light green, and thin, is lack of fat, usually 10 days or so. If the leaves are thick green and thick, it means that there is no shortage of fertilizer, but it can not be pursued. Generally, it can be applied for up to three times in one growing season. The fertilizer is excessive, the cockroach is easy to rot, and the lotus leaf is dead.
2. How to prevent pests and diseases.
In the growing period, the common diseases of the lotus flower are brown streak disease, which mainly damages the lobe, which is caused by the infection of the fungus Alternaria solani, and the other is the spot blight, which also damages the lobe, caused by the fungus leaf spot infection. The symptoms of the two diseases are very similar, and they are connected by plaques to form plaques, which make the mesophyll green and yellow. It is generally concentrated in the rainy season, mainly due to factors such as high temperature, high humidity, weak growth of lotus flowers, poor lighting and ventilation conditions. When it is more serious, it can be used for 800 times of zinc or thiophanate. Take prevention as the mainstay, remove the diseased leaves in time, and adjust the density reasonably.
Insect pests generally include aphids, chafers, and moths. The aphids are more powerful. They are more than 20 years old. They are clustered on leaves, petioles and young flower buds by nymphs and adults. They can suck the juice and kill it. Off. A small amount can be pinched by hand or sprayed with leaves during daily watering.
3. Winter storage methods.
In the Beijing area, the lotus flower is generally in a period of decline in the middle and late September. The leaves gradually turn yellow and dry, and the dry yellow leaves should be cut off in time to prepare for storage.
The pool storage can be placed in the pool before and after the “Eleventhâ€. Water is injected to keep the water temperature under the ice layer of 0 ° C to 8 ° C for winter.
Cold storage in the late October to early November, put the potted water into the cold simmer, keep the temperature between 0 ° C and 8 ° C, keep the soil moist, you can safely winter.
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