Hanging flower culture should pay attention to the following points:
1, don't water too often, let the soil surface dry before watering.
2. To increase the air humidity, you need to spray water to the growing environment or warm water (water temperature is about 20℃) on the leaves every day, or you can cover it with a transparent plastic film with several holes at the top to maintain a high air humidity!
3. During the winter of osmanthus, we must prevent the environment from being hot! The optimum temperature is about 10℃, and if it is osmanthus fragrans, it can be raised to 15 ~ 20℃, mainly floral. The high temperature in winter is very unfavorable to the growth of the next year!
Question 2: What is the reason why osmanthus leaves fall? Osmanthus fragrans is an evergreen tree species, but it will also shed leaves and have many leaves. There are reasons for this, some are normal phenomena, and some are problems that we should pay attention to in the process of planting osmanthus trees.
Generally speaking, we can be divided into three categories. The first time was caused by the freezing of osmanthus trees, which will not happen in the south, mainly in the north. It should be noted that osmanthus trees have certain cold resistance, but the low temperature in winter is too long, which makes osmanthus trees unbearable. It is best to take measures to prevent freezing. The second reason is that if there is too much water, the leaves will fall. Osmanthus fragrans needs a lot of water, not just watering it. We should drain osmanthus trees in time when it rains or rains heavily. If there is too much water in the body, osmanthus will also fall. The third reason is normal natural phenomena. The metabolic function of osmanthus trees can also cause defoliation. The metabolism of osmanthus trees will be the most obvious in April, and the leaves will increase, but this is normal. It will gradually increase from autumn to April.
We don't have to worry about normal metabolic defoliation, but we need to pay attention to two other reasons. In the fourth season, potted osmanthus can be placed in sunny places, and outdoor osmanthus can help straw ropes keep out the cold on trees. The second reason is also easy to solve. It is enough to control water properly and pay attention to flood prevention.
Question 3: What is the reason why osmanthus leaves fall? Your osmanthus may not keep up with nutrition and moisture or the soil is alkaline. In addition, the temperature difference between morning and evening is very large, especially in early spring, which can easily lead to a large number of old leaves falling off and new buds dehydrated and dried!
Question 4: What are the reasons for the leaves of osmanthus fragrans? Brown spot, Fusarium wilt and anthracnose of osmanthus fragrans are common leaf diseases, which can lead to premature defoliation of osmanthus fragrans, weaken its growth potential and reduce its flower yield and ornamental value.
Brown spot of osmanthus fragrans
At the initial stage of the disease, there are yellow macules on the leaves, which gradually expand into a nearly round lesion with a diameter of 2 ~ 10mm, or become irregular lesions due to the expansion of the lesion restricted by the veins. The focus is yellowish brown to grayish brown with yellow halo around it. Brown spot disease generally occurs from April to 10, and older leaves are more susceptible to disease than younger leaves. The pathogen overwinters on the diseased leaves with mycelium, and conidia are produced in the following spring for primary infection, and the conidia are spread by airflow and raindrops.
Osmanthus wilt
The pathogen of the disease mostly invades from the leaf margin and tip, and occurs at the leaf margin and tip. At the initial stage of the disease, light brown spots are produced on the leaves, which gradually expand into round or irregular lesions, and then expand into nearly round or irregular taupe spots with dark brown edges. Fusarium wilt occurred from July to 165438+ 10, which can occur all year round in the greenhouse with poor environmental conditions. Pathogens are spread and infected by conidia through wind and water. High temperature, high humidity and poor ventilation are conducive to the onset. Old leaves and leaves at the lower part of the plant are seriously ill when the plant grows weak and overwinters.
Anthracnose of osmanthus fragrans
This disease infects the leaves of osmanthus fragrans. At the early stage of the disease, small chlorosis spots appeared on the leaves, which gradually expanded to form round, semi-circular or oval lesions. The lesion is light brown to grayish white with reddish-brown ring at the edge. Under wet conditions, pink myxospore discs appear on the lesion. Anthrax occurs from April to June. Pathogenic bacteria overwinter in the diseased leaves of maple trees and spread through wind and rain.
Preventive and control measures
First of all, reduce the source of infection. Thoroughly remove diseased leaves in autumn. Potted sweet-scented osmanthus should remove the diseased leaves in time.
Secondly, strengthen cultivation management. Choose fertile and well-drained soil or substrate to plant osmanthus fragrans; Increase the application of organic fertilizer and potassium fertilizer; Planting density should be suitable for ventilation and light transmission, reduce leaf humidity and reduce diseases.
Scientific use of chemicals for prevention and control. At the initial stage of the disease, the Bordeaux mixture can be sprayed at a ratio of 1: 2: 200, and then 50% carbendazim wettable powder at a ratio of 1000 or 50% benomyl wettable powder at a ratio of 1000 to 1500 can be sprayed. Seedlings in seriously ill areas should be soaked and disinfected with 1000 times potassium permanganate solution when they leave the nursery.
Question 5: No one has touched the reason why osmanthus trees fall leaves. Generally speaking, greening is blown by the wind when transplanting, and the nutrition can't keep up after planting.
Question 6: What causes osmanthus leaves to become like this? The high ground temperature is caused by direct sunlight. Osmanthus fragrans needs a sunshade net at the hottest time every day in summer.
Question 7: What about the fallen leaves of osmanthus fragrans? I think it may be that the pot of osmanthus you bought has just been dug out of the ground and transplanted into the pot before it was sold. Because of too many damaged roots, it has been unable to grow new roots to absorb nutrients from potted soil for the nutritional needs of plant growth. At first, flowers, leaves and fruits depended on consuming nutrients in plants to maintain their growth. After a long time, the same situation as cut flowers will appear. The second reason is that there is too much water in the soil, which leads to lack of oxygen in the roots. You use a mixture of pond mud and crystal mud. There is a lot of water. If you water it every day, it will also make plants fall into flowers and leaves. Not every plant can grow well when watered every day. The biological characteristic of osmanthus fragrans is that it doesn't need much water. In winter and spring, it is enough to pour osmanthus in the basin once or twice a week.
I suggest you cut off more than half of the branches and leaves of the plants, leaving only thick branches. But keep a certain number of leaves. Place the plants in a sunny place to avoid direct blowing from the north wind. Be careful not to rush to fertilize the roots, spray foliar fertilizer on the leaves and keep the soil in proper humidity. When plants grow new roots again, new buds and leaves can be pulled out again. This part of the advice is based on the advice in the book. If you want to plant flowers and raise fish in the future, you must know in advance, and the same is true for doing things. )
Question 8: Regarding the defoliation of Osmanthus fragrans, you bought Osmanthus fragrans, and abscisic acid was produced at the base of petiole to prepare the defoliation field to adapt to the drought situation, reduce the evaporation of leaves, maintain life, and suddenly water branches to replenish water, resulting in cell bursting. It is a defoliation phenomenon that leaves leave leaves. This defoliation phenomenon is very harmful. It can be solved by dropping slowly with a bottle.
Question 9: Causes and pruning skills of osmanthus fragrans leaves 30 points.
First, the root system was seriously injured, and the foundation failed to grow new roots to absorb nutrients from the basin soil for the nutritional needs of plant growth. At first, flowers, leaves and fruits depended on consuming nutrients in plants to maintain their growth. Over time, leaves and flowers fell.
Second, it may be that there is too much water in the soil, which leads to lack of oxygen in the roots.
Pruning skills:
You cut off more than half of the branches and leaves of the plant, leaving only thick branches. But keep a certain number of leaves. Place the plants in a sunny place to avoid direct blowing from the north wind. Be careful not to rush to fertilize the roots, spray foliar fertilizer on the leaves and keep the soil in proper humidity. When plants grow new roots again, new buds and leaves can be pulled out again.