Sheath blight is one of the most significant diseases affecting rice production. For many years, Jinggangmycin has been a widely used fungicide for managing this disease. However, with increasing resistance in the pathogen, especially in some regions, it's important to consider alternative effective treatments. The China Pesticide Network introduces several promising options that can be used as alternatives or in combination with traditional methods.
One such product is **Full Spike (240 g/L thifluzamide suspension)**. This fungicide works by inhibiting succinic acid dehydrogenase in the fungal respiratory chain, leading to the death of the pathogen. Unlike Jinggangmycin and azole fungicides, it offers a different mode of action. It has strong systemic activity, providing both preventive and curative effects. Its long-lasting effect—up to 30 days—makes it ideal for rice safety. It is recommended to apply 15–22.5 ml per acre, ideally 20 days before heading or at the early stages of infection, using 20 ml of the product in 20 liters of water.
Another option is **Good Lectra (43% tebuconazole suspension)**. This triazole fungicide is quickly absorbed through leaves and roots, and then translocated throughout the plant. It inhibits sterol demethylation, preventing the formation of the fungal cell membrane. It is effective against a wide range of pathogens, promotes plant growth, and improves yield and grain quality. Apply 12–15 ml per acre during the tillering stage, mixing with 30–40 kg of water. Always pre-dilute the concentrate before adding the rest of the water.
**Fine Grain (20% tricyclazole WP)** is another systemic fungicide that is highly effective against sheath blight. It is rapidly absorbed by rice plants and remains active even after rain, provided it has dried for at least four hours. With a long residual effect of 15–20 days, it outperforms Jinggangmycin in terms of duration. Use 40g per acre mixed with 45kg of water at the early stage of the disease. Avoid spraying during midday heat, maintain a 3–7 cm water layer, and ensure thorough mixing.
**Lice Grain Spirit (30% chlorothalonil + imidacloprid WP)** is a multi-functional formulation that targets both sheath blight and planthoppers. It has an efficacy of around 84% against sheath blight and over 90% against planthoppers. One application can control both pests and diseases. Use 25g per acre, first preparing a small amount of concentrated solution, then diluting with 40–50 kg of water. If the field is dry, double the water volume and spray evenly on the lower parts of the rice plants.
**Shensinmycin (1% Shensinmycin Suspension)** is an antibiotic-based fungicide that not only controls sheath blight but also helps promote plant growth. It is effective against various fungal and soil-borne diseases in vegetables and fruit trees. Apply 60–80 ml per acre with 45 kg of water during the early stages of infection for optimal results.
**Jin Lux (250 g/L propiconazole EC)** is another triazole fungicide that disrupts ergosterol synthesis, causing cell membrane damage and pathogen death. Domestic and imported versions are available, with dosages ranging from 6.25–7.5 ml per acre for domestic and 5–10 g per acre for imported products. Apply 25–30 ml per acre with 40 kg of water, depending on disease severity. Avoid applying too close to heading to prevent overuse.
**15% Jinggang-Propiconazole Wettable Powder** combines the benefits of Jinggangmycin and propiconazole, offering improved efficacy and longer protection. Field tests have shown it to control sheath blight effectively with a dosage of 20–35 g per mu. Maintain a 3–6 cm water layer in the field for best results.
Proper application is crucial. The China Pesticide Network recommends timely spraying based on disease occurrence. Since sheath blight often appears in the lower parts of the plant, especially in later growth stages, increase water volume to at least 50 kg per mu. Aim to drip the solution directly to the base of the rice plants for maximum effectiveness.
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