Bacterial pesticides refer to the use of biological organisms (fungi, bacteria, insect viruses, genetically modified organisms, natural enemies, etc.) or their metabolites (pheromone, auxin, naphthaleneacetic acid, 2,4-D, etc.) to kill agricultural pests or Inhibitory preparation. A class of pesticide preparations for the control of pests, or a pesticide preparation with a specific effect by biomimetic synthesis.
Characteristics of Bacterial Pesticides Bacterial pesticides are often used in agricultural production because of their low toxicity, low environmental pollution and low resistance to pests. Because of the different insecticidal principles of bacterial pesticides, chemical pesticides will reduce the use of drugs. The effect is even completely ineffective. Therefore, what should be paid attention to when using bacterial pesticides can improve the use of bacterial pesticides.
Precautions for the use of bacterial pesticides In general, the use of bacterial pesticides should take into account factors such as temperature, humidity, sunlight and rain.
First, the suitable temperature for the spraying of bacterial bio-pesticide is 20-30 degrees Celsius. This is because the active ingredients of such pesticides are protein crystals and living spores. At low temperatures, spores are very slow in the growth of pests, and protein crystals are not easy. It works.
Second, the use of bacterial biologics pesticides, the greater the environmental humidity, the higher the efficacy, especially with powdered biological pesticides.
Because the bacterial spores are not resistant to dry environmental conditions, the sprayed bacterial powder should be carried out in the morning and evening when dew is present, so as to facilitate the adhesion of the microbial agent to the base leaves, and promote spore reproduction and improve the efficacy.
3. Application of biologic pesticides after 5 pm or on cloudy days UV rays in the sun have a killing effect on spores. Direct sunlight exposure for 30 minutes, the spore mortality rate of about 50%, the death rate of up to 80% after 1 hour of irradiation.
4. Medium to heavy rain will cause the bacterial and pesticide efficacy to decrease. The heavy rain will wash away the bacterial liquid sprayed on the foliage, reducing the efficacy, but if it is light rain after 5 hours of application, it will not reduce the control effect. There is synergy.
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