A list of the contents of this article:

What if the four seasons cinnamon leaves fall off?

1. Solution: buckle water, spray water to the leaves every day to increase air humidity, open windows for ventilation in good days, and spray 800 times of carbendazim to the leaves may also be saved. Lack of fertilizer the new growth of cinnamon leaves will also wither the leaves, indicating the lack of fertilizer. Lack of certain trace elements, it is recommended to apply trace elements.

2. The sweet-scented osmanthus pot plant suddenly lost all its leaves, which must be caused by the shedding of yellow leaves caused by too much watering. We should stop watering, loosen the soil urgently, and move to a dark and ventilated place indoors. The correct cultivation method of sweet-scented osmanthus is balcony cultivation. Young plants are the most suitable for balcony cultivation.

3. Try root first aid, change the soil, wash the flowerpot, cut off the right amount of dry branches, do not expose yourself to the sun, and cut off the wound with sterilized scissors.

4. How to ensure the temperature when the leaves of the cinnamon fall in winter: the leaves of the cinnamon will fall because of the cold in winter, so it needs to be moved to a warmer place indoors for maintenance in time, so that the situation of its fallen leaves can be improved.

Key words: leaf blight of four seasons laurel and its control

1. It can be mancozeb wettable powder or chlorothalonil wettable powder, and double Bordeaux solution of lime can also have effect on bacterial blight. Spray three or four times and the withered leaf disease will be cured.

2. It can be mancozeb wettable powder or chlorothalonil wettable powder. Lime double Bordeaux solution also has effect on leaf blight. After spraying three or four times, the withered leaf disease will improve.

3. Control methods of cinnamon leaf blight in the four seasons after diseased leaves are found to be suffering from leaf blight, the diseased leaves should be found and removed in time, and it is best to burn all these leaves to avoid infecting other leaves.

4. Soil cinnamon is suitable to grow in slightly acidic soil, and is not resistant to alkali. If the soil is too acidic or alkaline, it will cause the leaves to dry up.

5. Yellow leaves of potted sweet-scented osmanthus. The soil is too sour or too alkaline. Four seasons cinnamon likes slightly acidic soil. If the acidity is too strong, it will lead to slow growth and yellowing of leaves. If it is alkaline soil, the leaves of Cinnamomum chinense will wither or even die after 2-3 months.

6. prevention and control methods: the seedlings transplanted by pressing should be carefully removed from the diseased leaves. Eliminate the source of primary infection. When taking seedlings from serious disease areas, it is best to spray 1000 times potassium permanganate solution when coming out of the nursery.

How to improve the leaf disease of sweet-scented osmanthus in the four seasons

1. Strengthen the management of Osmanthus fragrans. Select fertile and well-drained soil or substrate to plant sweet-scented osmanthus; increase the application of organic fertilizer and potassium fertilizer; planting density should be suitable for ventilation and light transmission, reduce leaf humidity and reduce the occurrence of diseases.

2. Sterilization, sterilization and disinfection are mainly aimed at the transplanted osmanthus, which should not only remove the diseased leaves, but also dilute 50% carbendazim wettable powder 500 times and spray the transplanted seedlings for disinfection. 0.1% potassium permanganate solution can also be used for sterilization.

3. Management, increasing the application of phosphorus and potassium fertilizer, often loosening the soil and weeding, preventing soil consolidation or stagnant water, watering and spraying water in time in case of high temperature and drought, so as to increase the disease resistance of sweet-scented osmanthus plants.

Control of Diseases and insect pests of Osmanthus fragrans

1. Prevention and control methods: 10% gram line Dan granule can be used to prevent and cure. When applying the pesticide, the soil 3-5 cm deep under the crown is pulled out, spread evenly to the ground, and then covered with soil. Strengthen cultivation management and increase the application of organic fertilizer.

2. The common diseases of sweet-scented osmanthus include leaf blight, brown spot and angular spot, which can be sprayed with Bordeaux solution or 1000 times of carbendazim wettable powder. Common pests include red spiders, whitefly, shell insects, military insects, etc., which can be sprayed with 1000 times omethoate EC.

3. Brushing raw lime paste on the technical branches of sweet-scented osmanthus trees can prevent stem borer from laying eggs in summer, relieve the skin of branches from being burned by the hot sun, eliminate diseases and insect pests on branches in winter, and prevent freezing injury of branches and stems.

4. There are whitefly, shell worm, diamondback moth, sweet-scented osmanthus leaf wasp and so on. The methods of prevention and control are as follows: digging overwintering cocoons in winter; wiping eggs or insect leaves during the full egg period; spraying 50% phoxim emulsion 1000-1500 times, or 80% dichlorvos emulsion, 1500 times water.

5. high temperature, high humidity, windy and rainy, the disease occurred seriously, and the disease spots were dense, resulting in withering and yellow shedding (figure 14). Fig. 14 symptom spores and conidia of sweet-scented osmanthus pseudocercus brown spot (2) the diseased leaves were removed in time and burned centrally. When the seedlings in the seriously diseased area came out of the nursery, 1000 times of potassium permanganate solution was sprayed for disinfection.

Sweet-scented osmanthus withered leaf disease can be improved by changing pot sterilization?

Breeders can give first aid by changing potted soil, increasing humidity, pruning branches and pruning leaves, adjusting temperature and so on, so that sweet-scented osmanthus leaves can quickly recover from dead leaves.

The leaves of potted sweet-scented osmanthus are black because they are infected with sweet-scented osmanthus leaf blight. After we recognize the source of the disease, we should remove the infected branches and leaves and burn them in time, loosen the soil and change the basin in time, change the basin soil and trim the roots according to the situation, spray with chemicals, strengthen ventilation and light, and promote recovery.

In the case of ventilation, germs are not easy to breed and will not spread quickly. In addition, in order to improve the disease resistance of sweet-scented osmanthus, it should be watered in time when hot and dry. If the sweet-scented osmanthus is seriously ill, spray the medicine for withered leaves every half a month from June.

Therefore, in this case, it is not necessary to wash the roots and change the pot of the plant. The dried leaves appeared in the sweet-scented osmanthus plant after transplanting, the main reason was that the root system of sweet-scented osmanthus tree was seriously damaged or there was too little soil, and the plant appeared serious slow seedling after planting.

What are the control methods of sweet-scented osmanthus diseases?

The meticulous maintenance of control methods and the application of phosphorus and potassium fertilizer can make the plant grow strong and enhance the disease resistance of the plant.

The common diseases of sweet-scented osmanthus include leaf blight, brown spot and angular spot, which can be sprayed with Bordeaux solution or 1000 times of carbendazim wettable powder. Common pests include red spiders, whitefly, shell insects, military insects, etc., which can be sprayed with 1000 times omethoate EC.

Brown spot, cut off the diseased leaves on the plant, spray with mancozeb and carbendazim 800 times solution, once every 5-7 days, spray 2-3 times successively. The disease can be prevented by spraying with 1000 times of the above-mentioned medicine twice before spring bud and once every 15 days during June.

During the onset of the disease, 50% thiophanate methyl 800-1000 times dilution can be sprayed for prevention and treatment. Scale insects often appear in the plum rain season, which can be brushed off pests manually, or sprayed with a 700-fold dilution of 20% dicofol; red spiders mostly occur in high-temperature and dry climate conditions, and the leaves become curled or scorched after damage, and finally fall off.