Honeysuckle, as a highly demanded medicinal herb on the market, is planted by many. However, during the cultivation of honeysuckle, powdery mildew may occur at times. Let's learn how to treat powdery mildew on honeysuckle together.
Symptoms of Powdery Mildew on Honeysuckle
Powdery mildew on honeysuckle mainly affects the leaves, sometimes also attacking the stems and flowers. Initially, the spots on the leaves are small and white, which later expand into powdery white patches. In the later stages, the entire leaf becomes covered with a layer of white powder, and in severe cases, the leaves turn yellow, deform, or even fall off. The spots on the stems are brown, irregular in shape, with white powder on top, and the flowers may become distorted and eventually drop off.
Pattern of Powdery Mildew on Honeysuckle
The pathogen of powdery mildew on honeysuckle is the fungus Erysiphe flexuosa, which overwinters as ascospores in diseased plant residues. The following year, ascospores are released from ascocarps for primary infection. After infection, conidia are produced on the diseased parts for secondary infection. Powdery mildew is more likely to occur in warm, dry conditions or in shaded areas between plants. Overuse of nitrogen fertilizer and alternating wet and dry conditions can exacerbate the disease.
Treatment of Powdery Mildew on Honeysuckle
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Use Disease-Resistant Varieties: Choose disease-resistant varieties of honeysuckle suitable for local conditions, and timely spray fungicides in the field to reduce the source of the pathogen.
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Enhance Management: Plant densely, pay attention to ventilation, apply fertilizers scientifically, increase the application of phosphorus and potassium fertilizers, improve plant resistance to diseases. Before the honeysuckle buds, timely spray Flower Strong Strengthening Agent to promote strong buds, large petals, bright colors, strong fragrance, and prolong flowering period. Timely irrigation and drainage after rain to prevent moisture retention.
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Chemical Control: Spray 50% colloidal sulfur 100g in 20kg of water or 15% triadimefon wettable powder 2000 times liquid when the disease occurs initially. Meanwhile, combine with spraying New High-fat Film 800 times liquid to improve the utilization rate of effective ingredients in the pesticide and consolidate the control effect.
In conclusion, powdery mildew is a common disease on honeysuckle, widely occurring in various planting areas across the country, and causing serious harm. Therefore, it is essential to implement preventive measures in advance.
