The invention relates to the technical field of biological prevention and control of agricultural pests, and discloses a preparation method of a vegetable
aphid biological insecticide based on an
artemisia frigida extract. The preparation method comprises the following steps: S1, collecting raw materials: selecting stems and leaves of the overground part of fresh
artemisia frigida, and cleaning for later use; s2, crushing treatment: crushing the cleaned stems and leaves of the
artemisia frigida to obtain artemisia frigida
powder; s3, extraction: inorganic extraction: weighing 100g of cold artemisia
powder, adding 500ml 1%
alcohol and 500ml 1%
sodium carbonate, mixing, performing inorganic extraction, filtering after the inorganic extraction is completed, and collecting an inorganic extracting solution; organic extraction: taking 20ml of
terpenoid substances, mixing with 60g of vegetable
protein, and stirring for 15 hours to complete organic extraction, so as to obtain an organic extracting solution; and mixing and extracting: combining the inorganic extracting solution and the organic extracting solution, adding 15kg of water, and uniformly stirring. According to the preparation method and application of the artemisia frigida extract-based vegetable
aphid biological insecticide, the biological insecticide has an efficient prevention and
treatment effect on aphids on vegetables such as cucumbers, eggplants and peppers, and the harm of the aphids to the vegetables can be effectively reduced.