When applying microbial living pesticides, it's essential to pay attention to environmental conditions. One key factor is temperature—using the product in excessively cold conditions can significantly reduce its effectiveness. Some farmers neglect this and apply the pesticide during cold weather, such as in winter or early spring, leading to poor pest control. This is because these biological pesticides perform best at higher temperatures. Studies have shown that their efficacy increases by 1-2 times when applied between 25-30°C compared to 10-15°C.
Another important consideration is humidity. Applying the pesticide during dry, hot weather—such as from 10 a.m. to 4 p.m.—is not ideal, as low humidity can negatively impact its performance. It's better to apply it when the air is more humid, like on cloudy days, during light rain, or in the early morning.
Strong sunlight should also be avoided. Applying the pesticide during midday, when both heat and UV rays are intense, can reduce its effectiveness. Microbial pesticides, especially those containing spores, are highly sensitive to ultraviolet radiation. Prolonged exposure can damage or kill the spores, reducing their ability to infect pests. Therefore, it’s best to apply them after 4 p.m. or on overcast days.
Heavy rain following application is another issue. The spores can be washed away by heavy rainfall, making the treatment ineffective. However, light rain that occurs a few hours after spraying can actually help. It promotes spore germination, which speeds up the infection process and enhances pest control. Always check the weather forecast before applying to avoid unexpected rain.
Lastly, avoid mixing microbial pesticides with fungicides. These products work through live spores, which can be killed if exposed to fungicides. Once the spores are destroyed, the pesticide loses its effectiveness. Therefore, it's crucial to keep them separate to ensure optimal results.
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