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Find out why the application is not effective
Pest control is most commonly achieved through the use of **pesticides**. However, many farmers often find that the results are not as effective as expected. Even some products labeled as "high-quality" with complete certifications, new ingredients, and advanced formulations sometimes fail to deliver. These products may end up being labeled as "fake" or ineffective due to various reasons.
Several factors can influence the effectiveness of pesticides:
1. **Quality of the pesticide itself**: The formulation, active ingredients, and physical properties of the pesticide all play a role in its performance. Different dosage forms of the same ingredient can yield different results. Variations in production methods and quality control among manufacturers can also affect efficacy. In some cases, companies may exaggerate the concentration of active ingredients, which ultimately reduces the product’s effectiveness.
2. **Spray quality and application technique**: The way pesticides are applied has a significant impact on their effectiveness. Many farmers still use traditional spraying equipment that produces large droplets, which bounce off plant surfaces instead of adhering properly. This leads to up to 50% of the solution falling onto the ground rather than the crop. Reducing droplet size can significantly improve coverage and efficiency. However, increasing water volume to ensure full coverage is not always effective—excess liquid can cause droplets to merge into larger ones, reducing the amount of pesticide on the leaves. To improve spray quality, it's important to use fine nozzles, maintain a distance of at least 20 cm from the crop, and consider adding surfactants like silicone agents to reduce surface tension and minimize runoff, especially on waxy plants.
3. **Incorrect disease diagnosis and treatment**: Accurate diagnosis is crucial for effective pest and disease control. Farmers and dealers often rely on experience, which can lead to confusion between fungal and bacterial infections. Misdiagnosis can result in using the wrong type of pesticide, missing the optimal treatment window, and ultimately reducing the effectiveness of the product. This can create the impression that the pesticide isn't working when, in fact, the problem was misidentified.
4. **Misunderstandings about pesticide mixing**: Many farmers try to combine multiple pesticides in one application, hoping to treat all issues at once. However, improper mixing can cause chemical incompatibilities, such as acid-base reactions, precipitation, or reduced efficacy. It's important to dilute each pesticide separately before mixing, follow the correct order of application, and consider the pH levels of the solutions to maintain stability and effectiveness.
5. **Ineffective disease prevention strategies**: Some farmers adopt an “attack-first†approach, waiting until symptoms appear before applying treatments. This can lead to overuse of certain pesticides, promoting resistance and making future control more difficult. A better strategy is to focus on prevention, rotate pesticide types, and use protective agents to delay resistance development. Relying solely on a single compound for long periods can lead to serious problems when resistance becomes widespread.
6. **Environmental conditions**: Temperature and humidity also play a key role in pesticide effectiveness. Spraying when dew is still present can dilute the pesticide, while extreme temperatures can reduce its activity. The ideal temperature range for most applications is between 20°C and 30°C.
It's unrealistic to expect quick fixes or “magic†solutions. According to the **China Pesticide Network**, improving pesticide effectiveness requires addressing all possible limiting factors, making informed choices, and following best practices. By understanding these challenges and adjusting application methods accordingly, farmers can maximize the benefits of their pesticide use.