Insecticidal activity of three cicuta L. plant extractives
A hemlock and insecticide technology, applied in the field of pesticides, can solve the problem of no insecticidal activity found, and achieve the effect of broad insecticidal spectrum and high insecticidal activity
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Embodiment 1
[0015] Example 1: Extraction of hemlock, hemlock and hemlock original variants with ethanol and the insecticidal activity of the extract
[0016] The whole plants of hemlock, hemlock and hemlock original varietal were collected, dried indoors, and then pulverized. Using the cold soaking extraction method, add analytical pure ethanol 4 times the weight of the whole plant dry powder of the three plants, soak in a dark place, stir from time to time, filter after 4 days, add the same amount of ethanol to the residue and continue soaking, repeat 3 times, Combine the filtrates and concentrate under reduced pressure to obtain the ethanol extracts of the whole plant of hemlock, hemlock and hemlock original variants.
[0017] Weigh an appropriate amount of the obtained ethanol extracts of hemlock, hemlock and hemlock varietal, dissolve them with a small amount of acetone, and then add them to dechlorinated tap water. The volume ratio of acetone / water is controlled below 2%, and 60 mL o...
Embodiment 2
[0019] Example 2: Using methanol to extract hemlock, hemlock and hemlock original variant whole plant and the insecticidal activity of the extract
[0020] Whole plants of hemlock, hemlock and hemlock original var. were collected, dried indoors, and then crushed. Using the cold soaking extraction method, add 3 times the weight of analytical pure methanol of hemlock, hemlock and hemlock original variant dry powder, soak in a dark place, stir from time to time, filter after 4 days, and add the same amount of methanol to the residue Continue to soak, repeat 3 times, combine the filtrates and concentrate under reduced pressure to obtain the methanol extract of the whole plant of hemlock, hemlock and hemlock varietal. Weigh an appropriate amount of the obtained methanol extracts of hemlock, hemlock and hemlock varietal, dissolve them with a small amount of acetone, and then add them into dechlorinated tap water. The volume ratio of acetone / water is controlled below 2%. solution, s...
Embodiment 3
[0021] Example 3: Extracting hemlock, hemlock and hemlock original variants with petroleum ether and the insecticidal activity of the extract
[0022] Whole plants of hemlock, hemlock and hemlock original var. were collected, dried indoors, and then crushed. Using the cold soaking extraction method, add petroleum ether 5 times the weight of the dry powder of the whole plant of the three plants and soak in a dark place, stir from time to time during the period, filter after 4 days, add the same amount of petroleum ether to the residue and continue soaking, repeat 3 times, Combine the filtrates and concentrate under reduced pressure to obtain the petroleum ether extracts of the whole plant of hemlock, hemlock and hemlock varietal. Weigh an appropriate amount of the obtained hemlock, hemlock and hemlock varietal whole plant petroleum ether extract, dissolve it with a small amount of acetone, then add it to dechlorinated tap water, the volume ratio of acetone / water is controlled b...
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