How to prevent and treat magnolia chlorosis? A detailed guide to the methods
How to prevent and treat magnolia chlorosis? Please give an introduction. Magnolia chlorosis, also known as chlorosis disease, is a common disease of magnolia, and it occurs even more commonly in areas where the soil is on the alkaline side. In the northern regions of our country, the disease is relatively severe. Symptoms: The diseased plant first begins to develop the disease at the young tender leaves at the tip of the shoots. The mesophyll tissue of the diseased leaves turns...
How to prevent and treat magnolia chlorosis? Please give an introduction
Magnolia chlorosis, also known as chlorosis disease, is a common disease of magnolia, and it occurs even more commonly in areas where the soil is on the alkaline side. In the northern regions of our country, the disease is relatively severe.
Symptoms
The diseased plant first begins to develop the disease at the young tender leaves at the tip of the shoots. The mesophyll tissue of the diseased leaves turns yellow or pale yellow, while the veins remain green. As the disease progresses, the entire leaf turns yellow to yellow-white, and the leaf margins turn gray-brown or brown and necrotic. The disease becomes increasingly severe, the plant grows weak, and it eventually dies.
Causes of the disease
Magnolia chlorosis is a non-infectious disease, that is, a physiological disease. Its main cause is soil that is heavy, moist, and on the alkaline side, which makes iron exist in an insoluble state, thus causing iron deficiency in the plant and leading to the disease.
Prevention and treatment methods
1. Magnolias should be planted in acidic soil that faces the sun, drains well, and is fertile and loose. For potted soil, acidic soil such as mountain soil should be used, and it is best to replace it with new soil once every 1-2 years.
2. In the early stage of the disease, ferrous sulfate (black alum) diluted 30-50 times can be used to irrigate the soil around the roots, or "alum fertilizer water" (made by mixing and composting 2.5 kg of ferrous sulfate, 5 kg of soybean cake, and 15 kg of pig manure, then applying it after 10-15 days of fermentation and decomposition ~~ the experience of flower farmers in Yanling, Henan) can be used alternately with clear water for irrigation. A 0.1-0.2% ferrous sulfate aqueous solution can also be sprayed on the leaf surface.
Click to get more magnolia cultivation techniques
Click to get more flower cultivation techniques