With the continuous expansion of research fields and depth of plant-derived pesticides , especially the progress of modern chromatographic separation, nuclear magnetic resonance and other chemical structure identification techniques and biological activity determination methods, it provides a powerful means for the research of plant-derived pesticides, many foundations. Sex research has achieved important results, and the active substances, effective doses, effects on pests and diseases and the mode of action of most plants have been clarified.
Most plant-derived active substances interfere with the normal behavior of pests, causing them to resist food, avoidance, hinder growth and development, resistance to spawning and even infertility. At present, the pesticides have obtained 0.65% of artemisinin insecticide, 0.20%, 0.36%, 0.60% matrine, 0.23% matrine emulsifiable concentrate, 1.1% matrine powder, 10% smoke. Alkali emulsifiable concentrate, 27% oleic acid nicotine emulsifiable concentrate, 0.5% horn horn water agent, 2.5% vine emulsifiable concentrate, 3.5% hypertonic rotenone emulsifiable concentrate, 0.5% linalool solution, 0.3%, 0.5% locust insecticide emulsifiable concentrate, 4.1%, 81% allicin EC, 0.002%, 0.004%, 0.010%, 0.040%, 0.100%, 0.150% and other series of brassinolide preparations, and more than 30 compound preparations using these plant-derived pesticides as main components .
The registration and control objects of these biological pesticides mainly focus on pests on vegetables and cotton, such as aphids, cabbage caterpillars, diamondback moths and cotton bollworms. However, due to the low content of active ingredients in the existing products of plant-derived pesticides, the effect of the drug is not ideal, the control effect is greatly affected by environmental factors (temperature, humidity), the quick-acting effect is insufficient, the storage stability of the preparation is poor, and the production process and The analytical methods are difficult to master, lack of unified standards, and the quality is not easy to control, and so on. The varieties available for industrial development are limited, and it is impossible to form influential products, which directly leads to the slow development of plant-derived pesticide industrialization. At the same time, due to the direct use of certain parts of plants as raw materials for the production of pesticides, excessive mining will result in depletion of resources and destruction of the ecological environment. Therefore, the China Pesticide Network suggests that research on plant-derived pesticides should optimize the structure and develop practical compounds based on the chemical structure and activity of the active substances.
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