An application method of a walnut green skin extract and its application in tobacco aphid disease
A technology of walnut green husk and tobacco aphids, which is applied in the direction of botanical equipment and methods, application, preservation of human or animal bodies, etc., can solve problems such as no related reports, and achieve improved utilization rate, long duration of drug effect, and protection The effect of ecological environment
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Embodiment 1
[0024] (1) Take the outer layer of walnut green skin, ventilate and dry it to prevent the color from turning black, then dry it at 75°C, crush it after cooling, pass through a 60-mesh sieve to obtain walnut green skin powder, and store it at room temperature for later use;
[0025] (2) Weigh a certain amount of walnut green husk powder into the container, add petroleum ether at a volume ratio of 1:2, the boiling point range of petroleum ether is: 30-60°C, reflux extraction at 45°C for 2 hours, degrease, and cool to Filtrate after room temperature, recover the petroleum ether in the filtrate, and filter the residue for subsequent use;
[0026] (3) Take the filter residue in step (2), add 50% ethyl acetate solution according to the volume ratio of 1:5, reflux extraction at 70°C for 5 hours, filter, and use the filtrate and filter residue for later use;
[0027] (4) Add 80% ethyl acetate to the filter residue of walnut green skin in step (3) in a volume ratio of 1:3, extract, ref...
Embodiment 2
[0030] (1) Take the outer green skin of the walnut, ventilate and dry it to prevent the color from turning black, then dry it at 90°C, crush it after cooling, and pass through a 100-mesh sieve to obtain walnut green skin powder, which is stored at room temperature for later use;
[0031] (2) Weigh a certain amount of walnut green husk powder into the container, add petroleum ether at a volume ratio of 1:2, the boiling point range of petroleum ether is: 30-60°C, reflux extraction at 45°C for 2 hours, degrease, and cool to Filtrate after room temperature, recover the petroleum ether in the filtrate, and filter the residue for subsequent use;
[0032] (3) Take the filter residue in step (2), add 70% ethyl acetate solution according to the volume ratio of 1:10, reflux extraction at 80°C for 5 hours, filter, and use the filtrate and filter residue for later use;
[0033] (4) Take walnut green skin filter residue in step (3) and add 90% ethyl acetate in a volume ratio of 1:6, extrac...
Embodiment 3
[0036] (1) Take the outer layer of walnut green skin, ventilate and dry it to prevent the color from turning black, then dry it at 85°C, crush it after cooling, and pass through an 80-mesh sieve to obtain walnut green skin powder, which is stored at room temperature for later use;
[0037] (2) Weigh a certain amount of walnut green husk powder into the container, add petroleum ether at a volume ratio of 1:2, the boiling point range of petroleum ether is: 30-60°C, reflux extraction at 45°C for 2 hours, degrease, and cool to Filtrate after room temperature, recover the petroleum ether in the filtrate, and filter the residue for subsequent use;
[0038] (3) Take the filter residue in step (2), add 60% ethyl acetate solution according to the volume ratio of 1:5, reflux extraction at 75°C for 5 hours, filter, and use the filtrate and filter residue for later use;
[0039] (4) Take walnut green skin filter residue in step (3) and add 85% ethyl acetate in a volume ratio of 1:4, extra...
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