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How to Use Biopesticides
Biopesticide is a kind of pesticide with high insecticidal performance, which does not pollute the environment and poison humans and animals, does not harm natural enemies, and does not induce drug resistance. It is also called "bacterial pesticide" and has a wide range of biological pesticides. Development prospects. However, you must pay attention to the following issues when using it. When temperature bio-pesticides are sprayed, be sure to master the control at an ideal temperature above 20 degrees Celsius. The active ingredient of this type of pesticide is composed of protein crystals and living spores. Once sprayed at a temperature lower than the above temperature, the rate of propagation of spores in insect pests is very slow, and protein crystals are also difficult to exert their effects. After spraying, no control effect was shown. According to experiments, the effect of biological pesticides after spraying at a temperature of 25-30 degrees Celsius is 1-2 times higher than the insecticidal efficiency between 10-15 degrees Celsius. Hygroscopic biological pesticides are also extremely sensitive to humidity. According to some research data, the greater the environmental humidity, the more pronounced the efficacy of pesticides sprayed with biological agents, especially for powdered biological agents. This tells us that when spraying bacterial powders must be firmly grasp the morning and evening dew, the use of the vegetable crop can not be ignored, so that the drug can adhere to the stems and leaves, will quickly reproduce the spores, As soon as the pests eat any of the leaves, they will be able to call. Ultraviolet rays in the sun's sunlight have a lethal effect on spores. Scientific experiments tell us that in only 30 minutes under direct sunlight, the spores will be killed by 50% at one stroke, and when they are irradiated for 1 hour, their spores mortality rate will be as high as 80%, and ultraviolet radiation can produce parasporal crystals. Deformation and de-escalation effects, so choose to use after 4 o'clock in the afternoon or on cloudy days. Rainwater spores are most afraid of rainstorms, so they should be carried out according to the weather forecast, because rainstorms will wash out the bacteria liquid sprayed on the vegetables and will lose their lethality. However, if they encounter 5 or 6 hours of light rain after spraying, they will not only reduce Efficacy, but can improve control efficiency. Light rain is good for germination of spores, and pests accelerate their death once they eat.