Humidity is closely related to grasp the micro-biological activity of pesticides and humidity. Generally, the greater the environmental humidity, the more obvious the effect, especially the powdery microbial pesticides. It is best to apply the medicine when the dew is not dry in the morning and evening, so that the microorganisms can rapidly multiply and play a better control effect.
Mastering the temperature The activity of microbial pesticides is directly related to temperature. The suitable temperature for the use environment should be above 15 °C and below 30 °C. Below the appropriate temperature, the bio-pesticides sprayed are slow to propagate in the pests, and it is also difficult to function, resulting in poor product efficacy. Generally, the control effect of microbial pesticides at 20-30 ° C is 1-2 times higher than that at 10-15 ° C.
Avoiding light rain after spraying rainwater is beneficial to the reproduction of active tissues in microbial pesticides , and will not affect the efficacy. However, the rainstorm will wash away the liquid sprayed on the crops, affecting the control effect. According to the local weather forecast, timely application of drugs, avoid heavy rain and heavy rain to ensure insecticidal effect.
Avoid strong light UV rays have a lethal killing effect on microbial pesticides. When exposed to sunlight for 30 to 60 minutes, the microbial mortality rate can reach 50% and 80%. Therefore, it is best to choose cloudy or evening application.
In addition, the virus-based microbial pesticides are highly specific and generally only act on one pest and have no effect on other pests. For example, the Plutella xylostella granulosis virus can only be used to control Plutella xylostella. Before use, we must first investigate the occurrence of pests in the field, arrange the prevention and treatment period according to the occurrence of pests, and timely use the medicine.
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