Current walnut disease prevention and control technology
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June 24 11:15:20, 2025
In recent years, the problem of black walnuts has become more severe due to pests and diseases such as the walnut limb moth, anthracnose, and black spot. These issues have significantly impacted both the yield and quality of walnuts, causing great concern among farmers. As the peak season for these pests and diseases approaches, it is crucial for fruit growers to act promptly and implement effective prevention and control measures.
Regarding the walnut limb moth, also known as the walnut black caterpillar, adults typically appear between June and July, while the larvae cause the most damage in July. Fortunately, these pests have relatively low resistance to pesticides. Farmers can use non-polluting options like 10% hydropermethrin EC diluted 1500–2000 times or 15% imidacloprid diluted 3000 times. It's recommended to start spraying at the end of June, and then repeat the application every 7–10 days for better results.
For anthracnose and black spot, both are serious fungal diseases that lead to fruit rot and greatly affect walnut production. These diseases tend to peak during the rainy season, which usually occurs from July to August. To prevent them, farmers should apply fungicides such as 50% carbendazim diluted 800–1000 times or 50% thiophanate-methyl diluted 500–800 times before the rainy season begins.
It is essential for local authorities and agricultural departments to provide guidance and support to farmers, ensuring they are well-informed about the best practices for pest and disease management. By working together, we can protect the walnut industry and ensure sustainable production for future generations.
Government Office of Shangshidong Township, Xinglong County, Chengde City
Tension: 067300