Botanical sterilization preparation and application thereof in prevention and control of blight of vegetables
A plant source and preparation technology, applied in the direction of fungicides, plant growth regulators, chemicals for biological control, etc., can solve the problems of polluted environment, pesticide residues, etc., and achieve simple production process, good quality and broad application prospects Effect
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Embodiment 1
[0036] The preparation of the double-sided needle extract comprises the following steps:
[0037] (1) Take the underground part of Liangmianzhen, clean it, drain it, dry it fully in the shade, and then crush it through a 60-mesh sieve;
[0038] (2) Weigh a certain weight of the double-faced needle powder prepared in (1) and pour it into a multi-functional extraction tank, take 95% ethanol with a weight / volume ratio of 1:4 times of the double-faced needle powder into the multi-functional extraction tank, and repeatedly percolate for 8 hour, then solid-liquid separation, repeated 3 times, combined liquid;
[0039] (3) Recover the ethanol from the liquid obtained in (2) under reduced pressure, and stop the distillation when the specific gravity of the concentrate reaches 1.1-1.2 to obtain the LMZ extract;
[0040] (4) Dilute the LMZ extract obtained in (3) with water with a weight-volume ratio of 3 times the extract, then add petroleum ether with a weight-volume ratio of 5 times...
Embodiment 2
[0043] The preparation of the double-sided needle extract comprises the following steps:
[0044] (1) Take the underground part of Liangmianzhen, clean it, drain it, dry it fully in the shade, and then crush it through a 60-mesh sieve;
[0045](2) Weigh a certain weight of the double-faced needle powder prepared in (1) and pour it into a multi-functional extraction tank, take 95% ethanol with a weight / volume ratio of 1:6 times of the double-faced needle powder into the multi-functional extraction tank, and repeatedly percolate for 10 hour, then solid-liquid separation, repeated 2 times, combined liquid;
[0046] (3) Recover the ethanol from the liquid obtained in (2) under reduced pressure, and stop the distillation when the specific gravity of the concentrate reaches 1.1-1.2 to obtain the LMZ extract;
[0047] (4) Dilute the LMZ extract obtained in (3) with water with a weight-to-volume ratio of 4 times the extract, then add petroleum ether with a weight-to-volume ratio of 6...
Embodiment 3
[0050] The method for preparing the plant-derived bactericidal preparation is: take 10 parts by weight of the LMZ extract prepared in Example 1 or 2, 1 part by volume of 95% ethanol and 20 parts by volume of sterile water, stir evenly, bottle and pack.
[0051] The application method of using the botanical bactericidal preparation prepared above to prevent and control vegetable wilt is as follows: take the above-mentioned botanical bactericidal preparation of the extract of Liangmianzhen, add 250 times the volume of clean water, and stir evenly to irrigate the roots.
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