Preparation method of botanical insecticide
A plant insecticide and insecticide technology, which is applied in the fields of botanical equipment and methods, insecticides, plant growth regulators, etc., can solve the problems of micro-toxicity, environmental pollution, and the easy formation of drug resistance of animals and plants. To achieve the effect of safe and extensive use, no pollution to the environment, and easy to degrade naturally
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[0009] When preparing, the Chinese herbal medicine plants should be selected first, and each raw material should be pure dry product to avoid mildew, moth-eaten, discoloration, staleness, deterioration and other fake and inferior products, that is, the raw materials are selected according to the routine.
[0010] The preparation process of the tobacco concentrate is as follows: the raw materials are air-dried or dehydrated and air-dried in other ways and then pulverized into 1-6 mm, strips, sheets or other shapes, and the pulverized raw materials are soaked in water with a temperature above 20 ° C for 20-48 hours. The weight ratio with water is 1: 4, then dewatering with a centrifuge, the filter press squeezes out the active ingredient with a specific gravity of 0.02-0.04 of 2800-3000 purpose, and then the filtrate is concentrated and refined in the reactor for 3-4 hours, and the temperature is 90 ℃. -110°C, that is, a concentrated solution with a specific gravity of 0.04-0.11 ...
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