Causes of yellowing and curling of black-eyed Susan's leaves. Methods to prevent yellowing and curling of black-eyed Susan's leaves. Black-eyed Susan, as a common ornamental plant in my country, is deeply loved by people for its beautiful plant shape and unique color. During the maintenance process, yellowing and curling of black-eyed Susan's leaves occur from time to time, which seriously affects its ornamental value. This article will provide you with a detailed analysis of the causes and prevention methods of yellowing and curling of black-eyed Susan's leaves, and help you solve this problem. Reasons why Black-Eyed Susan's leaves turn yellow and curl 1. Improper water management Black-Eyed Susan has a higher demand for water, but too much water can cause root rot, which in turn affects the health of the leaves. If you water too much or too little, it may cause the leaves to become yellow and curl.
2. Insufficient light and black eyes Susan prefers semi-cloudy environments. If she is exposed to direct light or dark places for a long time, it will cause the leaves to turn yellow and curl.
3. Soil problems The soil is too hardened, poor drainage or insufficient soil fertility may cause the leaves of Black-eyed Susan to become yellowed and curled.
4. The pests and diseases Black-eyed Susan is vulnerable to pests such as aphids and red spiders. If not controlled in time, the leaves will be yellowed and curled.
5. Malnutrition for a long time without fertilization or improper fertilization will cause black-eyed Susan's leaves to turn yellow and curl. Prevention and control methods of black-eyed Susan's leaves from yellowing and curling 1. Appropriate watering According to the growth habits of black-eyed Susan, keep the soil moist. When watering, pay attention to watering the roots thoroughly to avoid stagnant water.
2. Place black-eyed Susan in a semi-cloudy environment with appropriate lighting to avoid direct strong light. During the period of vigorous growth, the lighting time can be appropriately increased.
3. Improve the soil and replace the soil regularly to keep the soil loose and well drained. You can choose soil with good air permeability such as murus and peat soil.
4. Regularly inspect Black-eyed Susan to prevent and control pests and diseases. If pests and diseases are found, treat them promptly. Pesticides, fungicides, etc. can be used for prevention and control.
5. Fertilization management According to the growth stage of Black-eyed Susan, reasonable fertilization can be applied. Nitrogen fertilizer can be applied during the vigorous growth period, and phosphorus and potassium fertilizers can be applied during the flowering period.
There are many reasons for the yellowing and curling of Black-eyed Susan's leaves. We need to prevent and control them according to specific reasons. Through reasonable water management, light, soil improvement, pest and disease control and fertilization management, this problem can be effectively solved, so that Black-eyed Susan is full of vitality.
References: [1] Zhang Wei, Li Na. Cultivation and maintenance of Black-eyed Susan [J]. Botanical Garden, 2018, 37 (2): 123-125.
[2]Wang Fang, Liu Yang. Research on pest control technology for black-eyed Susan [J]. Plant Protection, 2019, 45 (3): 45-47.