Before purchasing pesticides, it's essential to first identify the specific pests and diseases you need to control. Understanding what needs to be treated and what needs to be cured will help you choose the right type of pesticide. When buying, always check the label and product description carefully. Legitimate pesticides should have clear information on their labels, including the pesticide name, active ingredient content, trademark, batch number, manufacturing date, shelf life, and three essential certificates: the pesticide registration certificate number, approval certificate number, and product standard number. A complete manual and certification documents should also be provided. Avoid buying any pesticide that lacks these certifications or has unclear labeling.
Additionally, inspect the outer packaging of the pesticide. If the powder, wettable powder, or soluble powder has clumped together, or if liquid formulations are cloudy, or emulsifiable concentrates appear opaque, these could be signs of poor quality or expired products. Similarly, if granular formulations contain too much dust, they may not be suitable for use. It's also important to be cautious when purchasing multiple-ingredient pesticides. For example, some products labeled as "Dagongchen," "Four Seasons Red," "One Pass Net," or "Phlegm" may all be 10% imidacloprid wettable powders, meaning they are essentially the same product under different names. Others might combine different active ingredients, such as a mix of pyrethroid and organophosphorus pesticides, or even a combination of several organophosphorus compounds. Even if the drug name is the same, the actual active ingredients can vary significantly, so always double-check the label before making a purchase.
When applying pesticides, farmers should follow several key guidelines. First, apply the pesticide based on the symptoms and timing of the infestation. Accurate identification of pests and diseases is crucial, as this helps determine the most effective pesticide and dosage form. For disease prevention, apply protective agents before the disease appears. Once the disease is present, switch to a curative agent. To control diseases effectively, follow the principle of early protection and timely treatment, ensuring that the application is done at the optimal time and repeated as necessary for best results.
Second, use pesticides wisely. Do not increase the dose, concentration, or frequency of application unnecessarily, as overuse can lead to plant damage or resistance. Always apply pesticides within the recommended concentration range, and use lower concentrations for preventive purposes where possible. The number of applications should be based on the residual effect of the pesticide and the severity of the pest or disease outbreak.
Third, pay attention to the method of application. Different pesticide formulations require different application techniques. Emulsions and wettable powders are typically sprayed or poured, while powders are mainly used for spraying. Granules are usually spread or incorporated into the soil, and liquid formulations can be sprayed, poured, or applied as a stem coating. Pesticides with different modes of action should also be applied in ways that maximize their effectiveness. Choose the right application method and timing based on the pest’s behavior, the disease’s progression, and the formulation type.
This article was originally published by the China Pesticide Network. Please cite the source if you use this information.
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