Rosé New Leaves Wrinkled and Withered
Rosé new leaves wrinkling and withering is a common problem that troubles gardeners, often indicating that the plant is suffering from disease or improper care. This article will analyze the three core causes of the problem, accompanied by high-definition diagnostic charts, to teach you how to quickly identify the symptoms and take targeted emergency measures.
Diagnostics of Abnormal Leaf Diseases in Rosé
1. Fungal Powdery Mildew Infection
When both old and new leaves show curling and are covered with white powdery substances, it can be determined as powdery mildew infection. This disease spreads rapidly in environments with humidity >65%, leading to hindered photosynthesis and, in severe cases, causing bud drop. It is recommended to immediately cut off the diseased leaves and spray 2000 times liquid of 25% propiconazole wettable powder, while increasing phosphorus and potassium fertilization to enhance plant resistance.
2. Sucking Insect Infestation
New leaves curling with honeydew secretion, and red spiders/aphids visible on the back of the leaves indicate the爆发 of pest infestations. It is recommended to use a compound of螺虫乙酯 (spinetoram) + 阿维菌素 (abamectin), focusing on spraying the back of the leaves. For severely infected plants, a three-step treatment is needed: pruning diseased branches → drenching roots with insecticide → replacing the substrate, to block the overwintering route of eggs.
3. Root Suffocation Due to Waterlogging
Continuous rain or excessive watering leading to soil moisture content >40% will cause the capillary roots to rot due to lack of oxygen. This is manifested by curled leaf edges and dull leaf color. For emergency treatment, create drainage ditches or elevate the pot, and for severe waterlogging, immediately remove the pot, prune the roots, and soak them in 800 times liquid of carbendazim before changing to a new substrate of perlite: peat = 1:3.
Advanced Maintenance Prevention Plan
In addition to the above emergency measures, it is recommended to apply seaweed extract root strengtheners monthly to enhance stress resistance, maintain an environmental ventilation rate >1.5 m/s, and spray 800 times liquid of mancozeb before the plum rain season to prevent diseases. Monitor the cultivation environment in real-time with a thermometer and humidity gauge, maintaining ideal day temperatures of 25-28°C and night temperatures of 15-18°C.
Systematic maintenance management can reduce the incidence of rosé diseases by 80%. When leaves show abnormalities, it is recommended to follow the process of 'observe symptoms → compare with charts →分级处理 (分级处理 =分级 treatment levels)' in a timely manner. Remember that healthy rosé leaves should have a waxy luster, with flat edges at an angle of 15-30°. Mastering these characteristics can help you detect issues earlier.