Common Disease Control Methods for米兰花
米兰花 is favored by horticulture enthusiasts for its elegant fragrance, but is often troubled by diseases during maintenance. This article deeply analyzes the key points of prevention and treatment for three typical diseases to help you scientifically care for the plants.
Complete Analysis of Disease Control for Milan花 (T-J)
Symptom Characteristics and Spread Patterns
(T-J) disease mainly affects the leaf edges and young branches, initially presenting brown spots accompanied by orange-red spore groups. This fungal disease spreads faster at temperatures between 28-32°C and humidity >80%, with July to September being the peak period.
Three-Level Prevention and Control System
① Environmental Control: Maintain a plant spacing of over 30 cm, and set up a rainproof shed during the rainy season. ② Nutritional Management: Apply a solution of monopotassium phosphate (0.2% concentration) every month. ③ Pharmaceutical Program: Alternate the use of benalaxazole (10% diluted 1500 times) and pyraclostrobin (25% diluted 2000 times).
Comprehensive Control of Milan花 Sooty Mold Disease
Disease Occurrence Mechanism
Sooty mold disease often occurs with aphid infestation, with black mold layers blocking the stomata. When the environmental temperature consistently exceeds 25°C and ventilation is poor, the incidence rate increases by 40%.
Biological + Chemical Combined Control
① Physical Removal: Use a soft brush dipped in rice vinegar solution (1:50) to wash off the mold spots. ② Introduction of Natural Enemies: Release ladybirds (3-5 per plant) to control aphid populations. ③ Combination of Medicines: Matrine (0.3%) + mancozeb (80% wettable powder) dual-effect treatment.
Systemic Solution for Milan花 Yellowing Disease
Diagnosis of Deficiency-Induced Yellowing
New leaves turn yellow often due to iron deficiency (iron is fixed when pH > 7.5), while old leaves turning yellow are often accompanied by magnesium deficiency. Using EDTA chelated iron (once a week, 0.05% concentration) can quickly alleviate symptoms.
Soil Improvement Strategy
① Substrate Reconstruction: Peat soil + pine needle soil + perlite mixed in a ratio of 5:3:2. ② Acidification Treatment: Irrigate with ferrous sulfate (0.2%) solution monthly. ③ Root Activation: Use seaweed extract (1000 times solution) for root irrigation when yellowing is severe.
By establishing a disease monitoring log (record temperature, humidity, and plant status weekly), implementing a preventive spraying plan (key points of germination stage/after flowering), the incidence of diseases can be reduced by over 60%. It is recommended to equip a professional pH/EC tester to achieve precise plant care.