Tips for using bacterial biopesticides

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Biopesticides are biologically-produced compounds with biological activity of pesticides. The exact formulation of biological pesticides should be bio-sourced pesticides, including plant-derived, microbial, and animal-derived pesticides. Bacterial pesticides are a kind of microbial pesticides in biological pesticides. They have a high insecticidal rate, do not pollute the environment, do not poison humans and animals, and do not induce pest resistance. They are the new types of pesticides that are popularized and used for pollution-free cultivation of vegetables. What should you pay attention to when using bacterial biological pesticides?

The insecticidal effect of bacterial pesticides is related to the number and activity of bacteria. When used, weather conditions can directly affect the activity of bacteria in bacterial pesticides, thus affecting the effect. Therefore, special attention must be paid to temperature, humidity, sunlight, rain, etc. during use. condition.

Suitable temperature

The suitable temperature for the application of bacterial biopesticides is between 20°C and 30°C. This is because the active ingredients of these pesticides are protein crystals and living spores. At low temperatures, spores propagate very slowly in insect pests and protein crystals are unlikely to occur. effect. The bacterial biopesticides were applied at 25-30°C, and the drug efficacy was 1-2 times higher than that at 10-15°C.

Humidity is great

The use of bacterial biological pesticides, the higher the environmental humidity, the higher the efficacy, especially the application of powdered biological pesticides, should be carried out in the morning and evening dew, in order to facilitate the bacteria stick to the base leaf, and promote spores reproduction Improve efficacy.

Avoid sunlight

Ultraviolet rays in the sun have a killing effect on spores. Direct sunlight for 30 minutes, the spores mortality rate of about 50%, the mortality rate of up to 80% in 1 hour irradiation. Therefore, it is best to apply biopesticides after 5 pm or on cloudy days.

Avoid heavy rain

Moderate to heavy rain will flush out the bacterial liquid sprayed on the leaves, reducing the efficacy, but if the light rain after 5 hours of application, will not reduce the control effect, but there are synergies.

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