What to Do If the Epipremnum aureum Has Black Spots
The Epipremnum aureum, a common indoor foliage plant, often causes concern among caregivers when black spots appear on its leaves. This article systematically analyzes the three main causes of black spots on Epipremnum aureum and corresponding solutions to help you quickly diagnose the illness and revitalize the plant.
Analysis of Causes and Treatment Plan for Black Spot Disease in Epipremnum aureum
Black Spots Caused by Low Temperature Frostbite
When the ambient temperature remains below 10°C, the cell tissue of the Epipremnum aureum will undergo a browning reaction due to low-temperature frostbite. Initially, the leaf margins will turn yellow, and if not treated promptly, circular sunken black spots will form within 3-5 days. It is recommended to move the plant to an indoor environment with temperatures between 18-25°C, use a transparent insulating cover to maintain humidity, and gradually restore metabolic function.
Bacterial Spot Development Due to Poor Ventilation
In a closed environment with insufficient air circulation, the leaf stomata will accumulate dust and pathogen spores. Data shows that in a care environment with less than 2 hours of ventilation per day, the incidence of black spots on Epipremnum aureum increases by 67%. It is recommended to open windows for ventilation 30 minutes each in the morning and evening, use a circulating fan to promote air flow, and pay special attention to the cleaning and maintenance of the leaf backs.
Fungal Infection Treatment Plan
A high humidity environment (humidity > 80%) combined with temperatures between 28-32°C is the perfect breeding ground for (T-J) pathogens. Upon discovering diseased leaves, immediately cut them with alcohol-disinfected scissors 2 cm from the base of the petiole at an angle, and alternately use benalaxyl-m and mancozeb for prevention and control. Apply the pesticides at 7-day intervals for three consecutive times to eliminate the pathogen.
By adjusting temperature, improving ventilation, and using scientific medication, the triple protection system can effectively solve over 95% of black spot issues in Epipremnum aureum. It is recommended to use a garlic extract solution (1:50) for preventive spraying once a month in daily maintenance, combined with scattered light care, to keep the Epipremnum aureum in a healthy and attractive state.