Bacterial pesticides are biological pesticide preparations. The insecticidal effect is related to the quantity and activity of bacteria. When used, the climatic conditions are more stringent. When using, you must pay attention to the following matters. Electric Hammer Drill,Hammer Electric,Breaker Hammer,Electric Air Hammer Ningbo Hoya Electronic Commerce Co., LTD , https://www.jauhitools.com
First, the temperature: suitable temperature is above 20 °C. If the temperature is low, the active spores of bacterial pesticides are slow to breed in the pests, and the active protein is not easy to function. According to the experiment, the application at 25-30 °C is 1-2 times higher than that at 12-15 °C. .
Second, humidity: the greater the environmental humidity, the higher the efficacy, especially the application of powdery bacterial pesticides . The main cause is that the spores of bacteria are not monotonous. Therefore, the application of powdery bacterial pesticides should be carried out in the morning and evening when there is dew, so that the bacteria can adhere well to the stems and leaves of the crops, and promote the spore breeding and increase the chance of contact with the pests.
3. Sunlight: Ultraviolet rays in the sun have a killing effect on spores. When the sun shines directly for 30 minutes, the spores die 50%, and shine for 1 hour. The mortality rate is as high as 80%. In addition, ultraviolet radiation also has a deformation-reducing effect on the parasporal crystals. Therefore, it is advisable to apply the medicine after 4 pm or on cloudy days.
4. Rainwater: After heavy application, heavy rain will reduce the efficacy, but after 5 hours of application, drizzle will not only reduce the efficacy, but also have the effect of increasing the efficacy. The drizzle has an effect on the spore activity, which accelerates the death of the pest. Therefore, the application of bacterial pesticides should be linked to local weather forecasts to ensure that there is no moderate or heavy rain within 1-2 days after application. China's pesticide network suggests that in case of heavy rain after application, it should be applied immediately after the rain; at this time, the insecticidal effect is better.