Application of asarum extract in preventing and controlling agricultural mites

Abstract

The invention relates to application of an asarum extract in preventing and controlling two spotted spider mite. The asarum extract is prepared by the method comprising the following steps of: washing whole asarum herbs, drying in the shade, crushing by using a plant crusher, screening by using a 40-mesh sieve, adding 2-10 times of 95% ethanol, settling at room temperature, leaching for 1-7 days, stirring occasionally during leaching, and filtering to obtain a leach liquor; adding 2-10 times of 95% ethanol again into the filter residue, and extracting twice according to the above-mentioned method; and concentrating under reduced pressure by using a rotary evaporator to obtain the asarum extract. Various conventional auxiliary materials required by preparing different pesticide preparations can be added into the asarum extract, a pesticide missible oil solution can be prepared by using the conventional preparation process. Compared with chemically prepared pesticides, the asarum extract has the advantages of high effect, low residue and harmony with the environment and other living beings.

Description

technical field

[0001] The invention relates to a plant extract, in particular to the use of an asarum extract in preventing and controlling agricultural pest mites. Background technique

[0002] Herbivorous mites are the most common plant pests, which can seriously reduce the yield of many important economic crops, such as fruits, cotton, vegetables and ornamental plants, and are recognized as the most difficult pest community to control. Chemical pesticides have played an important role in controlling harmful mites in agricultural production, protecting crops from damage and ensuring agricultural economy. However, the long-term use of chemical pesticides has brought various disadvantages, such as excessive pesticide residues in agricultural products, and increased human and animal poisoning incidents. Pests have become resistant to pesticides, the number of natural enemies has plummeted, and the ecological balance has been disrupted. Therefore, the research and developmen...

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