What kind of pesticides does mancozeb belong to?
Mancozeb is a highly effective protective fungicide known for its low toxicity to mammals. It is widely used in agriculture, but many consumers are not fully aware of what mancozeb is or how it works. This article aims to provide a detailed explanation of the pesticide and its proper usage.
1. Function and Characteristics
Mancozeb is a broad-spectrum protective fungicide that works by inhibiting the oxidation of pyruvate in fungal cells. It appears as a gray-yellow powder and is prone to decomposition when exposed to moisture and high temperatures. While it is relatively safe for humans and animals, it can cause mild irritation to the skin and mucous membranes. It is toxic to aquatic life, such as fish, but no "three effects" (carcinogenic, mutagenic, or reproductive toxicity) were observed at tested doses.
2. Formulations
Mancozeb is available in various formulations, including 70% and 80% wettable powders, as well as 42% suspension concentrates. The effectiveness of each formulation may vary depending on the fineness of the powder and the type of adhesives used during production. These differences can influence the performance and coverage of the product on crops.
3. Target Pests and Application Methods
It is commonly used to control a wide range of fungal diseases, including those affecting melons, such as blight, downy mildew, leaf spot, and black spot. For optimal results, apply a 70% wettable powder solution diluted 400–600 times at the early stages of infection. Reapply after 7 to 10 days, with a total of 2 to 3 applications. Alternatively, you can use 80% Dasheng M45, Xinwansheng, or similar products, diluted 600–800 times. Spray at the first sign of disease, and repeat every 6 to 7 days for 2 to 3 times.
4. Safety Precautions
1. Do not mix Mancozeb with alkaline substances or copper-based products. However, it can be safely combined with many insecticides, fungicides, and acaricides.
2. Avoid applying the pesticide during the hottest part of the day, especially in summer, to prevent damage to plants and reduce exposure risk for applicators.
3. When using products like Dasheng M45, Xinwansheng, or similar, do not need to reapply after rain. Ensure even and thorough spraying for maximum effectiveness.
Proper handling and application of Mancozeb can help protect crops from fungal infections while minimizing risks to human health and the environment. Always follow the manufacturer’s instructions and safety guidelines when using any pesticide.
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