What are the precautions for applying biological pesticides?
What should be noted when applying biological pesticides? How can biological pesticides improve their efficacy? Experienced netizens are also asked to help explain. Biological pesticides refer to formulations that use living organisms (fungi, bacteria, insect viruses, genetically modified organisms, natural enemies, etc.) or their metabolites to kill or inhibit agricultural pests,...
What should be noted when applying biological pesticides? How can biological pesticides improve their efficacy? Experienced netizens are also asked to help explain.Biological pesticides refer to formulations that use living organisms (fungi, bacteria, insect viruses, genetically modified organisms, natural enemies, etc.) or their metabolites to kill or inhibit agricultural pests. They also have the characteristics of being effective at managing pests and having minimal adverse environmental impact. However, biological pesticides are easily affected by external factors during application, so Zhongdiwang has compiled the precautions to note when applying biological pesticides, listed below for netizens' reference.
Point one, temperature requirements for biological pesticides:
Because the active ingredients of biological pesticides are mainly composed of protein crystals and living spores, they have relatively high temperature requirements. Therefore, when using biological pesticides, the temperature must be controlled above 20°C. Once biological pesticides are sprayed below the optimal temperature, spore reproduction is very slow, and protein crystals can hardly play their role, often making it difficult to achieve the best control effect.
Tests have shown that under conditions of 20-30°C, the control effect of biological pesticides is 1-2 times higher than at 10-15°C. For this reason, the optimal temperature must be mastered to ensure the control effect of sprayed biological pesticides.
Point two, humidity requirements for biological pesticides:
Biological pesticides are extremely sensitive to humidity requirements. The greater the humidity of the farmland environment, the more obvious the efficacy, especially for powdered biological pesticides.
Therefore, when spraying bacterial powder, be sure to seize the moment just after the morning and evening dew has dried. When using it on edible agricultural products such as vegetables, melons and fruits, be sure to spray the agent evenly on the stems, leaf surfaces and undersides of leaves, so that the biological bacterial community can reproduce quickly, produce efficacy immediately, and achieve a very good control effect.
Point three, biological pesticides should avoid strong light:
Because ultraviolet rays in sunlight have a fatal killing effect on biological bacteria.
Scientific experiments have shown that after 60 minutes and 120 minutes of direct sunlight exposure, the mortality rate of biological bacteria can actually reach more than 30% and 50%, and ultraviolet radiation can also cause deformation and reduced efficacy of parasporal crystals. Therefore, avoid strong sunlight, enhance the vitality of biological bacteria, and give play to the control effect of biological bacteria.
Point four, applying biological pesticides should avoid being washed away by rain:
Biological bacterial agents are most afraid of being washed away by heavy rain. Heavy rain will wash away the bacterial liquid sprayed on crops such as vegetables, melons and fruits, affecting the killing power against pathogens.
If light rain occurs 5-8 hours after spraying, it is beneficial to the rapid reproduction and decomposition of biological bacteria, speeds up the killing of harmful bacterial groups, and can improve the control effect. For this reason, agricultural technicians in all regions are required, when guiding farmers in the use of biological pesticides, to use biological pesticides at the right time according to local weather forecasts, and strictly prohibit application during heavy rain, so as to ensure their killing effect.
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