Natural pyrethrin flower powder preparation and preparation method

Abstract

The invention provides natural pyrethrins pollen and the preparation method thereof. The natural pyrethrins pollen is prepared by natural assistant, and the materials has the weight rations that: thecontent of natural pyrethrins pollen is 0.1-1 percent of the total weight, plant derived potentiator is 1-5 times of the content of pyrethrins, plant derived antioxidant is 1-3 percent of the contentof natural pyrethrins, and the rest is fillings. The success of the preparing of the natural pyrethrins pollen of the invention greatly improves the stability of the pyrethrins in the air, and improves the prevention effect and the utilizing rate of the pollen. The natural pyrethrins pollen has excellent preventing effect on most agricultural vegetable pests such as pieris rapae, diamondback moth,and so on; and is ideal insecticide for producing pollution-free food, green food and organic food.

Description

technical field [0001] The invention relates to an insecticide, specifically (0.1-1%) natural pyrethrin pollen agent and a preparation method. Background technique [0002] Natural pyrethrins have been used as insecticides for a long time, and can be used for the control of household hygiene pests and agricultural pests. Natural pyrethrin is an insecticide extracted from pyrethrum flowers. It is easy to decompose in light and air, and is highly toxic to agricultural harmful insects. It is safe to warm-blooded animals, has no pollution to the environment, and has no residue. In the control of agricultural pests, natural pyrethrins mostly appear in the form of oil, wettable powder and emulsifiable concentrate. Moreover, pyrethrin oils and emulsifiable concentrates mostly use chemical organic solvents and plant-derived solvents, which not only pollute the environment, but also waste resources. [0003] The patent No. applied by our company in 2002 is: 02113260.7 "Pyrethrum dr...

AI Technical Summary

Problems solved by technology

Moreover, pyrethrin oils and emulsifiable concentrates mostly use chemical organic solvents and plant-derived solvents, which not only pollute the environment, but also waste resources

[0003] The patent No. applied by our company in 2002 is: 02113260.7 "Pyrethrum dry pollen and wettable powder" invention patent has the following deficiencies: 1) In the formula, after the dried pyrethrum is crushed, diatomite or talcum powder is added to make pyrethrum dry pollen. In the absence of antioxidants, pyrethrins have poor stability and are easily degraded; after 2 years of storage under airtight conditions at room temperature, the degradation of pyrethrum dry pollen has reached more than 25%, exceeding the national standard for the degradation of active ingredients within 5%. In high cases, the decomposition reaches 50%, and the product quality is difficult to guarantee

2) In terms of formula, there is no synergist added to the dry pollen of pyrethrum, which only acts as a repellant to insects, but cannot achieve the effect of killing insects, and the drug effect cannot be fully exerted

3) Since the formula requires that the dried pyrethrum pollen has a finer particle size, the dried pyrethrum pollen has to be pulverized twice, the processing time is long, the power consumption is high, the cost is increased, and a large amount of active ingredients of pyrethrins are degraded. As the particle size becomes smaller, the degradation speed of pollen is accelerated, and when the secondary crushing is performed, the machine will generate heat, and the increase in temperature will also accelerate the degradation of pyrethrins

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