A kind of botanical pesticide surfactant and its preparation method and application
A technology for surfactants and botanical pesticides, applied in the field of pesticides, can solve the problems of carcinogenic activity, high toxicity of fish, and difficult to biodegrade, and achieve the effects of low toxicity, low cost and convenient use.
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Embodiment 1
[0037] Embodiment 1 botanical pesticide surfactant
[0038] This example is used to illustrate the botanical pesticide surfactant of the present invention and its preparation method.
[0039] The raw material is Sophora flavescens, and the source is Sophora flavescens residue left after extracting total alkaloids of Sophora flavescens with ethanol by Inner Mongolia Qingyuanbao Biotechnology Co., Ltd.
[0040] The preparation method of botanical pesticide surfactant is preferably as follows:
[0041] (1) adding bitter bean dregs into water, soaking at 45°C for 24 hours, grinding for 3 hours, to obtain bitter bean dregs slurry A; wherein, the mass ratio of bitter bean dregs to water is 1:5;
[0042] (2) Dissolve pepsin, papain or bromelain in warm water at 30°C to obtain protease solution B;
[0043] (3) Put the bitter soybean dregs slurry A into the heating reaction kettle, adjust the pH to 2 with dilute hydrochloric acid, add protease solution B, heat up to 60°C, stir once e...
Embodiment 2
[0046] The emulsification property of embodiment 2 botanical pesticide surfactants
[0047] 1. Experimental materials and instruments:
[0048] 1. Experimental raw material: peanut oil
[0049] 2. Instruments: centrifuge (Xiangyi TDZ5-WS), beaker, measuring cylinder
[0050] 2. Experimental method:
[0051] Emulsion Stability Determination
[0052] Oil: water=1:9 ratio, add 1% botanical pesticide surfactant obtained in Example 1, stir and mix evenly, prepare emulsion, move the emulsion to a graduated centrifuge tube, and centrifuge at 4000rpm for 15min After reading the emulsified phase volume, calculate the result according to the following formula:
[0053] Emulsion stability % = emulsified layer height / total liquid height × 100%
[0054] The resulting value is: 76.3%.
[0055] It is proved that the botanical pesticide surfactant provided by the invention has strong emulsifying ability and stability.
Embodiment 3
[0056] Embodiment 3 plant source surfactant field test
[0057] 1. Demonstration purposes
[0058] Through experiments, taking 7.5% rotenone EC as an example, the control effect of plant-derived surfactant and traditional agricultural surfactant Nongru 500# on vegetable aphids was tested in the field.
[0059] 2. Demonstration drugs
[0060] 1. Demonstration agent: 7.5% rotenone emulsifiable concentrate A;
[0061] Taking 100 grams of 7.5% rotenone emulsifiable concentrate A as an example, its preparation method is:
[0062] (1) Accurately weigh 7.5 grams of rotenone and put it into a 200mL beaker;
[0063] (2) In the weighed rotenone beaker, add 30 grams of cyclohexanone, fully stir for 15 minutes, all the solids are dissolved;
[0064] (3) in the cyclohexanone solution that dissolves, add the botanical pesticide surfactant of 15 gram embodiment 1 gains, stir 15 minutes;
[0065] (4) Continue to add 47.5 grams of xylene and stir for 30 minutes to obtain 7.5% rotenone emuls...
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