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In the field of mulberry pest control, there are specific pesticides designed for this purpose. According to the China Pesticide Network, here are some key options that have been registered and approved for use on mulberry trees:
1. **Green Plant 60% Dieldrin Emulsifiable Concentrate (formerly known as Double-Effect Phosphorus)** – This is a special pesticide registered by the Ministry of Agriculture for mulberry trees. It has a short residual period and offers strong contact action with good economic safety. When applying, mix 15 ml of the pesticide into 16 liters of water (dose rate: 400–600 mg/kg). It is particularly effective in controlling larvae, such as those of moths and crickets, up to 10 days before leaf harvesting.
2. **Green Plant 40% Duowei (Sangbao) EC** – This is the only pesticide specifically registered for mulberry trees by the Ministry of Agriculture. It is widely used in sericulture regions like Jiangsu and Zhejiang. The product comes in injection form, with 4 ml per dose. When using, mix 4 ml into 16 liters of water. Apply it 8 days before harvest in summer and up to 15 days in spring or autumn. It effectively controls lepidopteran larvae, including those of the mulberry and wild pheasant. Always follow the recommended dosage (50–100 mg/kg), as overuse can be harmful. The pesticide is safe for silkworms when used correctly.
Regarding **mulberry mites**, no specific pesticide is currently registered for this pest, both domestically and internationally. However, farmers in Haining and Huzhou have opted for **73% Acetamiprid Emulsifiable Concentrate**, which is registered for use on citrus and vegetables. It shows good efficacy against mites, but careful dosing is required. For optimal results, mix 4 ml of the concentrate into 16 liters of water, and apply it 15 days before harvesting.
The requirements for pesticides in sericulture are extremely strict. Farmers should consult local plant protection departments for guidance. There are very few pesticides registered for use on mulberry trees globally, and the available products vary in quality. Therefore, extra caution is necessary:
1. Always choose registered, specialized pesticides for mulberry protection. Verify the brand and manufacturer to avoid counterfeit or low-quality products that could lead to silkworm poisoning.
2. Use sprayers exclusively for sericulture. Sprayers previously used for other pesticides, such as chrysanthemum-based ones, can be highly toxic to silkworms. Make sure to thoroughly clean any sprayer before using it for mulberry treatment.
3. When selecting pesticides like **73% Acetamiprid Emulsifiable Concentrate**, opt for products from reputable manufacturers. Start with a low concentration to test effectiveness and ensure safety for silkworms.
4. Silkworms are highly sensitive to pesticides. Always adhere strictly to the recommended dosage to prevent prolonged residue on mulberry leaves, which could cause poisoning. Also, avoid pesticide drift onto other mulberry fields to protect the overall crop.
By following these guidelines, farmers can effectively manage pests while maintaining the health of their silkworms and ensuring the quality of their silk production.
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