If the fallen leaves are round or spread inward, they are irregular patches, grayish brown to reddish brown, with dark brown edges and half of the fallen leaves are dry. Sometimes the affected part is curly and fragile. Then you should consider whether you have osmanthus wilt disease.
At the initial stage,1:1:100-200 bordeaux solution or 65% zineb 500 times solution can be sprayed first, and then 50% carbendazim wettable powder 800- 1000-60 can be sprayed.
Do osmanthus trees need pruning in spring? Osmanthus trees need pruning in spring.
Pruning osmanthus trees in spring has many benefits.
Pruning is an important measure to cultivate single-stem osmanthus trees. Through pruning, the nutrients of trees are redistributed in a planned way, so that the excessively dispersed nutrients are concentrated and mainly supplied to the growth center. To cultivate single-stem osmanthus trees, timely and reasonable pruning should be carried out to make the tree structure reasonable and form a single trunk, so that branches and leaves with strong assimilation ability can be planted in the favorable position of the trunk, and a large amount of nutrients can be promoted for the growth of the trunk to thicken, and the contradictions between the trunk and crown growth, flowering and vegetative growth, growth and aging and renewal can be regulated to make it grow into the required tree shape and reach the ideal height. It can also reduce pests and diseases, make sweet-scented osmanthus grow fast, the trunk is straight and the tree shape is beautiful, meet people's ornamental requirements and achieve the effect of beautifying the environment.
Different pruning methods can be used in different growth stages, such as seedling stage, young tree stage and adult tree stage. Because dried osmanthus fragrans has been in the nursery for a long time and needs to be transplanted many times, plastic pruning can be combined with transplanting pruning.
Osmanthus fragrans seedling stage is mainly to cultivate trunk. For one or two-year-old seedlings, let them grow freely, leaving upright branches as the trunk and branches and side branches as auxiliary branches. For 3-year-old seedlings, all the branches and side branches in the middle and lower part of the trunk are cut off. Branches and lateral branches on the upper part of the trunk can be selected according to the height of the trunk. In the first few years, thick branches will not be left on the trunk, but thin branches can be left. When the height of the trunk is suitable, choose 3 ~ 4 main branches on it. All selected branches should be lightly cut, destroying their original consumption centers, improving the transportation direction of nutrient solution, providing nutrients for the growth center at the top of the trunk, promoting the high growth of the trunk, and orienting the trees according to the cultivation purpose. On each branch, other branches may not be pruned, except that competitors appearing with the selected extended branch need to be controlled and pruned. If there are sprouts at the base of the trunk, they should be cut off as soon as possible, so as not to affect the growth of the trunk, concentrate water and nutrition, promote the development of the upper branches, and form an ideal ten-tree shape.
What happened to the leaves of osmanthus fragrans? Pay attention to watering in time. It is best to spray potassium dihydrogen phosphate on the leaves often, and the leaves will be greener, brighter, more and bigger. Osmanthus fragrans likes light and is drought-tolerant. It can be watered thoroughly and the soil is not dry. When watering with abundant water, add some nutrient solution to make the plants grow better and flourish.
The color of osmanthus trees is yellow, and many leaves have fallen off. What happened? It doesn't matter if the leaves are not sick. Plants also need metabolism. If some old leaves fall off, it can send out more new buds in spring. If the fallen leaves are round or spread inward, they are irregular patches, grayish brown to reddish brown, with dark brown edges and half of the fallen leaves are dry. Sometimes the affected part is curly and fragile. Then you should consider whether you have osmanthus wilt disease. At the initial stage,1:1:100-200 bordeaux solution or 65% zineb 500 times solution can be sprayed first, and then 50% carbendazim wettable powder 800- 1000-60 can be sprayed.
Is it normal for camellia to fall leaves in spring? It is normal for old leaves to fall off, especially when there are many leaves. When new leaves grow, some old leaves will fall off.
What flowers bloom in spring and fall leaves in autumn? There are many such flowers:
February to March is the magnolia period in Er Qiao; Peach blossoms bloom from March to April; March-April is the apricot blossom period; Cherry blossoms in central China in March; The flowering period of cherry is from March to April; Cherry blossoms in Yunnan from March to May; Wang Chunlan blooms in March; Magnolia grandiflora; The flowering period of Malus pendula is from March to April; Plum blossoms in March-April; Bauhinia blossoms from March to April. Wait, the autumn leaves have fallen.
How to deal with the fallen leaves of osmanthus trees with the wrong pesticides depends on what pesticides are used. It is generally found that the wrong pesticide is used, so it must be washed repeatedly with a lot of water to dilute the pesticide. Then spray the antidote according to the specific type of the wrong pesticide. If it is a herbicide, it can be degraded with herbicide safety additives; If it is a fungicide, use a plant cell repair agent to rescue it; Wait, it depends on what medicine it is.
Osmanthus fragrans is planted in spring. Is it easy to freeze to death in winter in the north? Answer (3) Enthusiastic friends 20 12-04- 15 generally not, except for extreme weather. Follow-up: Under what circumstances are you talking about extreme weather? A: Extreme weather means that the temperature is extremely low, which exceeds the previous weather and leaves and stems may freeze. Lesinoi 19 grade 20 12-04- 15 osmanthus trees can only be moved indoors in northern winter, otherwise it is likely to freeze to death. Follow-up: is it ok to put it in the greenhouse? Answer: Yes, then it won't freeze to death. Follow-up: Under what circumstances are osmanthus trees easy to survive? Answer: Weakly acidic soil will grow well with sufficient sunshine. Follow-up: What is the lowest temperature that Osmanthus fragrans can withstand? Answer: The lowest temperature can be minus 10 degrees. Follow-up: What kinds of osmanthus trees are there? Answer: The common ones are Jingui, Yin Gui, Dangui, Sijigui and Nissin. Follow-up: How about Sijigui? Better than others? Answer: Osmanthus fragrans can bloom many times a year, but there is no fragrance of the first three osmanthus fragrans. Follow-up: Hehe, mine is Sijigui. How many years will it take to grow into a big tree? Answer: It will take at least four or five years to grow bigger.
Osmanthus fragrans planted on the ground, how to solve the problem of falling leaves in winter? About 1.5m high. Put a big bag under it, and the fallen leaves float on it, so it's OK to pick it up.
Why don't osmanthus trees shed their leaves in autumn? It does not belong to deciduous plants! Only when new leaves grow in spring will the old leaves fall off.