Cinnamon leaf drying
Answering netizens' questions about the introduction of osmanthus clinic, the leaves of osmanthus are drying, and the following is introduced by the editor of this site for everyone.
Osmanthus, also known as Sweet Olive or Rock Osmanthus, is an evergreen shrub or small tree of the Oleaceae family, but it seems not easy to cultivate. Summing up the experience of flower friends, it is found that many people encounter the problem of osmanthus leaves drying and even turning brown or black during the breeding process. The following is a simple analysis of the problem of osmanthus leaves drying and even turning brown or black based on the experience of predecessors and experts in osmanthus cultivation.
A simple analysis of the problems that cause osmanthus leaves to dry and even turn brown or black is as follows:
1. Watering issue: The soil for osmanthus should be permeable and afraid of waterlogging. It is best not to water when it is not dry and water thoroughly each time. It fears waterlogging and积水. If affected by waterlogging, the roots will turn black and rot, the leaves will first have dry tips, and then the whole leaves will turn yellow and fall off, leading to the death of the whole plant.
2. Light issue: Appropriate arrangement of the degree and duration of sunlight for osmanthus.
3. Humidity issue: In high temperature or dry environments, shading and spraying methods are adopted to improve environmental humidity. Generally, it is the tip of old leaves that dry, and it can improve as long as the humidity is increased to over 60%.
4. Temperature issue: The optimal growth temperature is between 15-28°C. Lower or higher temperatures may cause problems.
5. Ventilation issue: It is necessary to increase ventilation at the right time. It is suitable to plant in a well-ventilated and light place; it prefers a clean and ventilated environment and is not resistant to smoke and dust damage.
6. Fertilization issue: Usually, it is necessary to increase potassium fertilizer and humus fertilizer to improve its own disease resistance.
7. Disease issue:
Brown spot disease: At the beginning of the disease, small chlorotic spots appear on the leaves, which gradually expand into nearly circular lesions. Brown spot disease usually occurs from April to October, and old leaves are more susceptible than young leaves.
Leaf blight: The pathogen of this disease often invades from the leaf margin and tip, occurring at the margin and tip of the leaves. At the beginning of the disease, light brown spots appear on the leaves, which gradually expand into circular or irregular lesions, and then expand into nearly circular or irregular gray-brown large spots with deep brown edges. Leaf blight occurs from July to November and can occur throughout the year in greenhouses with poor environmental conditions.
(T-J) disease: This disease infects osmanthus leaves. At the beginning of the disease, small chlorotic spots appear on the leaves, which gradually expand to form circular, semi-circular, or elliptical lesions. The lesions are light brown to grayish white with a red-brown ring around the edges. Under humid conditions, pale peach-colored sticky spore plates appear on the lesions. (T-J) disease occurs from April to June.
Control measures: First, reduce the source of infection. Thoroughly remove diseased leaves in autumn. For potted osmanthus, remove diseased leaves in time. Secondly, strengthen cultivation management. Choose fertile and well-drained soil or substrates to plant osmanthus; apply organic fertilizer and potassium fertilizer; choose an appropriate planting density to facilitate ventilation and light, reduce leaf surface humidity, and reduce the occurrence of diseases. Use agents scientifically for disease control.
The above is all about what to do when osmanthus leaves dry, for your comprehensive understanding and reference!