Biological pesticides and chemical fungicides cannot be mixed

What are the cross-use models for implementing pesticides in agriculture? According to the China Pesticide Network, there are four commonly used pesticide cross-use methods that farmers can apply to enhance effectiveness and reduce resistance. These strategies not only improve pest control but also help in saving time and labor. Here's a detailed look at each of them:

1. Cross-use between biological, mineral, and synthetic pesticides. For instance, in cabbage cultivation, different types such as Bt emulsion, fish vine essence, chlorpyrifos, cypermethrin, and trichlorfon can be alternated based on the specific needs of the crop and the type of pest present. This helps prevent resistance development and ensures more sustainable use.

2. Combining protective and systemic agents. In cases like downy mildew in vegetables, it's important to use different types of pesticides before and after the disease occurs. Protective agents may be applied early to prevent infection, while systemic agents are used later to treat the existing infection. This approach allows for more comprehensive disease management.

3. Using spray and fumigation agents together. Greenhouses and plastic sheds offer good sealing conditions, which make fumigation an effective method. Alongside regular spraying, fumigants can be used to target pests in hard-to-reach areas or during high infestation periods. This dual approach improves coverage and efficiency.

4. Other forms of cross-use include combining foliar and soil treatments, or using insecticides without ovicidal properties alongside ovicides. This ensures that both adult pests and their eggs are targeted, leading to better long-term control.

Proper mixing of pesticides can save time and resources while achieving simultaneous treatment and enhancing the overall effect. It also helps delay the development of pesticide resistance. However, it's crucial to follow guidelines when mixing. Bio-pesticides should not be mixed with chemical fungicides, and certain combinations—like organophosphorus or pyrethroid insecticides with dithiocarbamate fungicides—should be avoided when alkaline pesticides are involved. Always check compatibility before mixing to ensure safety and effectiveness.

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