Plant agent for killing snails, prepn. method and use method thereof
A snail agent and plant technology, applied in the field of pesticides, can solve the problems of difficulty in large-scale and long-term use, high price, toxicity and the like, and achieve the effects of simple preparation process, low cost and convenient use.
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Embodiment 1
[0028] Example 1: Weigh 100 g of dried Ginkgo biloba testa and pulverize it, ultrasonically extract 5 times the amount of petroleum ether three times, each time for 2 hours, combine the extracts, filter under reduced pressure, and evaporate the solvent to obtain a petroleum ether extract. Dissolve the extract in dimethylformamide to prepare a medicinal solution and add it to the living water of Oncomelania snails, wherein the content of dimethylformamide does not exceed 0.5mL / 100mL of water.
Embodiment 2
[0029] Example 2: Weigh 100 g of dried Ginkgo biloba testa and pulverize it, extract 5 times the amount of ethyl acetate under reflux at 75° C. for three times, each time for 2 hours, combine the extracts, filter under reduced pressure, and evaporate the solvent to form an ethyl acetate extract. The extract is dissolved in dimethylformamide to prepare a medicinal solution, which is added to the living water of Oncomelania snails, wherein the content of dimethylformamide does not exceed 0.5mL / 100mL of water.
Embodiment 3
[0030] Example 3: Weigh 100 g of dried Ginkgo biloba exocarp and pulverize it, extract 5 times the amount of ethanol under reflux at 70°C for three times, each time for 3 hours, combine the extracts, filter under reduced pressure, and evaporate the solvent to form an ethanol extract. The extract is dissolved in dimethylformamide to prepare a medicinal solution, which is added to the living water of Oncomelania snails, wherein the content of dimethylformamide does not exceed 0.5mL / 100mL of water.
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Abstract
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