What to Do When Huangli Leaves Turn Yellow and Rot
Multi肉 Huangli is loved by gardening enthusiasts for its bright yellow waxy leaves, but when the leaves turn yellow and rot, it often leaves caretakers at a loss. This article will systematically analyze the causes of the disease and provide professional treatment solutions to help you save your beloved multi肉 plants.
Analysis of the Three Main Causes of Huangli Leaf Lesions
Overhydration Leading to Hydration Reaction
Huangli's thick leaves can store water for 15-20 days, and excessive watering can cause cell walls to break and form transparent water spots. It is recommended to use the 'soak-dry' method, watering once every 10 days in spring and autumn, and extending to 15 days during the high-temperature summer period.
Fungal Black Rot Infection
The appearance of black infiltrating spots at the base of the stem is a typical symptom, and this disease can spread rapidly within 24-72 hours. Microscopic observation reveals Fusarium spores, with the optimal reproduction temperature being 25-28°C, and the risk of outbreaks doubles when humidity is over 70%.
Physical Damage Leading to Infection
Small wounds caused by transplanting or daily maintenance can become entry points for pathogenic bacteria. Experimental data shows that the infection rate of cuts made by unsterilized tools can reach 83%, so it is recommended to use a flame sterilization method to treat knives.
Four-Step Precise Treatment Implementation Plan
Urgent Isolation Treatment
Immediately move the affected plants out of the growing area and establish a 50cm isolation zone. Use 70% alcohol to wipe the operating table and prepare sterilized potting soil and high-temperature calcined granular media.
Scientific Lesion Removal
Make an oblique cut 2cm from the edge of the healthy tissue and apply wood vinegar liquid to the cut to form a protective film. The remaining stem sections need to be soaked in a 50% carbendazim solution (800 times dilution) for 20 minutes, and the drying time should be controlled between 48-72 hours.
Rebuilding the Root System
Select a mixture of vermiculite and red jade soil in a 1:3 ratio, and add 5% bamboo charcoal particles to enhance breathability. After potting, place it in a scattered light environment and maintain a day-night temperature difference of 8-10°C to stimulate new root growth.
Environmental Parameter Adjustment
During the recovery period, maintain an air humidity of 40-50%, and install a circulating fan to maintain an air flow velocity of 0.5m/s per hour. Control the light intensity to be between 10,000-15,000 lux and avoid direct sunlight that may burn new tissues.
Through systematic diagnosis and scientific intervention, the success rate of treating Huangli can reach 78% or more. It is recommended to apply Bacillus subtilis biological agents every quarter to establish a long-term protective mechanism. Regularly observe the fullness of the leaves and the growth point status, as early detection and treatment are key to maintaining the health of multi肉 plants.