Causes of blackening leaves of amaranth flowers. Methods to control blackening leaves of amaranth flowers. amaranth flowers, as a common indoor leaf-viewing plant, decorate many homes and offices with its elegant plant type and unique leaves. Many flower friends are in the maintenance process It was found that the leaves of amaranth flowers suddenly turned black, which not only affected the beauty of the plant, but also threatened its growth. This article will reveal the reasons for the blackening of amaranth flowers leaves and provide effective prevention and control methods. Reasons for blackening the leaves of sunflowers 1. Insufficient light Ssunflowers are native to tropical rainforests and prefer semi-shaded environments. If they are in the dark for a long time, the leaves cannot undergo adequate photosynthesis, which may easily lead to blackening of the leaves.
2. Improper watering watering is a key link in maintaining amaranth. Too much or too little watering may cause the leaves to turn black. Too much watering will cause the roots to lack oxygen and affect the plant's absorption of nutrients; too little watering will cause the leaves to lose water and cause the leaves to turn black.
3. The air humidity is low, sunflowers prefer humid environments. When the air humidity is low, the leaves easily lose water, which causes the leaves to turn black.
4. Diseases and insect pests of Sagittarius are vulnerable to pests such as red spiders and scale insects. The pests can cause the leaves to turn black.
5. Improper application of fertilizer. Excessive application of fertilizer or improper application of fertilizer may cause the leaves to turn black. Prevention and control methods of blackening of sunflowers leaves 1. Adjust the light and place sunflowers in a semi-shaded environment to avoid direct sunlight. If there is insufficient indoor light, artificial light can be used to supplement it.
2. Control watering timely watering according to the dryness and dryness of the soil to avoid too much or too little, keep the soil slightly moist, and should not accumulate water.
3. Increase the air humidity Place a basin around the sunflower, or use a humidifier to increase the air humidity.
4. Control pests and diseases Regularly inspect plants and treat pests and diseases in a timely manner. Pesticides, fungicides and other pesticides can be used for prevention and control.
5. Reasonable fertilization According to the growth stage and needs of sunflower, choose appropriate fertilizers to apply to avoid excessive fertilization and avoid causing the leaves to turn black.
There are many reasons why the leaves of amaranth sunflowers turn black, but as long as you master the correct maintenance methods, you can effectively prevent and treat them. I hope this article can help you maintain amaranth sunflowers and make your plants rejuvenate.
References: [1] Zhang Xiaofang, Yang Lili. Cultivation and management of indoor leaf-viewing plant Slancifera [J]. Botanical Garden, 2018, 37 (2): 1-3.
[2]Wang Ruifang, Zhang Xiaofang. Disease and insect pest control of indoor leaf-viewing plant Smelia latifolia [J]. Botanical Garden, 2017, 36 (3): 4-6.