Common Diseases and Control Methods of Burdock
As a highly ornamental variety in the family of succulent plants, burdock is deeply favored by horticulture enthusiasts for its vigorous vitality and unique reproductive characteristics. However, in actual maintenance, diseases such as gray mold and powdery mildew often lead to leaf lesions and root rot. This article will provide an in-depth analysis of the three most common diseases and offer a systematic control plan.
Key Points for the Control of Gray Mold
Symptom Characteristics and Identification
This disease commonly occurs during the plum rain season, initially presenting as translucent watermark spots on the leaf edges, which expand to gray-brown rot areas within 48 hours. Affected plants will produce a downy gray mold layer on the back of the leaves in an environment with humidity >75%.
Chemical Control and Physical Treatment
Immediately isolate the affected plants and use disinfected scissors to cut off the lesioned part 2cm outside the healthy tissue. Alternate spraying 50% metalaxyl wettable powder 1500 times liquid and 25% pyraclostrobin suspension 800 times liquid, once a week for 3 weeks.
Systematic Prevention and Control of Powdery Mildew
Disease Symptom Diagnosis
The typical feature is the appearance of round white powdery spots on both sides of the leaves, which can thicken to become felt-like when severe. This disease is spread through the air, and the risk of outbreak increases 3 times when the day-night temperature difference is >10℃.
Biological Control Plan
preferably use 2% Agricultural Antibiotic 120 water agent 200 times liquid for biological control, combined with spraying 1 time of baking soda solution (5g/L) per week to change the leaf surface pH. Apply 80% sulfur dry suspension agent 600 times liquid 15 days before the peak period of the disease.
Optimization of Maintenance Environment
Temperature and Humidity Control
Control the daytime temperature to be within the range of 18-25℃, and not lower than 12℃ at night. Use the bottom watering method to supply water, maintain the substrate humidity between 40%-60%, and install a circulating fan to ensure the air flow rate is >0.3m/s.
Light Management
Ensure 4-6 hours of direct sunlight in spring and autumn, and use a shading net to filter 50% of the strong sunlight in summer. Regularly rotate the flowerpot to make the plant receive uniform light and prevent stem bending caused by phototropism.
By establishing a three-dimensional protection system of disease monitoring, chemical control, and environmental regulation, the incidence of burdock diseases can be effectively reduced by 82%. It is recommended to conduct a full plant check every month, detect and treat early, combined with scientific fertilization to enhance plant disease resistance, in order to achieve long-term healthy maintenance.