Lee: Biological pesticides are prepared by using bacteria, fungi, and nematodes that are harmless to humans and poultry. It has a good effect on the disease, is targeted, non-polluting and non-toxic, killing the disease through external adsorption or internal adsorption. Residues also do not destroy soil and crops.
Disadvantages: Biological pesticides take a long time to work, less than a few hours, half of them are more than 5 days. There are many precautions for use. Incorrect is like spraying water on the crop once, without any effect. It requires high levels of pesticides, suitable dosage forms, suitable control periods, climatic conditions, and scientific blending. Because of its specificity, it is bacteria, fungi, and nematodes; therefore, there are many precautions. Strong sunlight contains a lot of ultraviolet light, killing microorganisms in microbial pesticides . Mixing with chemical pesticides will inactivate the microorganisms and die, with no effect.
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