The reasons why spring sword leaves are black and green, and the prevention and maintenance techniques for the black and green of spring sword leaves. Spring sword, as a traditional and precious flower in our country, is deeply loved for its elegant posture and unique fragrance. During the maintenance process, many flower friends will find that the leaves of spring sword appear black and green, which not only affects the ornamental value of spring sword, but also brings certain problems to maintenance. This article will explain the reasons for the black and green of spring sword leaves, prevention and maintenance skills, and help you solve this problem. Reason why the leaves of Chunjian are black and green 1. Disease infection The leaves of Chunjian appear black and green, which may be caused by disease infection. Common diseases include leaf spot disease, black spot disease, etc. These diseases will damage the leaves of Chunjian, causing the leaves to appear black and green spots or patches.
2. Improper maintenance and improper maintenance are also one of the reasons for the dark green appearance of spring sword leaves. For example, too much watering, insufficient light, and accumulated water in the soil may cause damage to the root system of spring sword, which in turn affects the normal growth of leaves.
3. Insufficient nutrition Spring swords need sufficient nutrients during their growth. If the soil is poor or the fertilization is improper, spring swords cannot absorb enough nutrients, and the leaves will appear black-green. Prevention and maintenance skills for black and green leaves of spring sword 1. Prevention and control of diseases (1) Clean up the sick leaves in time: After the sick leaves are found, they should be cut off in time to avoid the spread of the disease.
(2) Reasonable fertilization: Apply organic fertilizers and compound fertilizers to ensure sufficient nutrient supply for Chunjian.
(3) Spraying fungicides: In the early stage of the disease, spray 1000 times of 75% thiophanate-methyl wettable powder or 800 times of 50% carbendazim wettable powder for prevention and control.
2. Improve maintenance conditions (1) Watering: Keep the soil moist, but avoid stagnant water. Watering time should be in the morning or evening, and avoid watering during the high temperature period at noon.
(2) Lighting: Spring Jian is in a semi-cloudy environment. Direct strong light should be avoided and placed in a place with sufficient scattered light.
(3) Ventilation: Maintain indoor air circulation to avoid the breeding of diseases.
3. Nutritional supplement (1) Fertilization: Spring and autumn are the periods of vigorous growth of spring swords, and appropriate amounts of nitrogen, phosphorus and potassium compound fertilizers can be applied to promote leaf growth.
(2) Foliar spraying: A 0.2% potassium dihydrogen phosphate solution can be used for foliar spraying to supplement nutrients and improve Chunjian's disease resistance.
The black-green phenomenon of spring sword leaves is a common problem during the maintenance process. Understanding the reasons and adopting corresponding prevention and maintenance measures can effectively solve this problem. I hope this article can help the majority of flower lovers and help you raise beautiful and healthy spring sword.