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Plant agent for killing snails, prepn. method and use method thereof

A snail agent and snail technology, applied in the field of pesticides, can solve the problems of difficulty in large-scale and long-term use, high price, high toxicity, etc., and achieve the effects of simple preparation process, low cost, and easy popularization and application.

Inactive Publication Date: 2007-12-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium pentachlorophenate is an earlier molluscicide used in my country. It is effective in killing molluscs, but it is highly toxic and harmful to humans, poultry and aquatic animals, and its use has been gradually banned at present.
Bromoacetamide and niclosamide molluscicide recommended by the World Health Organization are highly toxic to non-target organisms such as fish and are expensive, so it is difficult to use in large areas and for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Weigh 100 g of dried ginkgo biloba exocarp and crush it, and ultrasonically extract with 5 times the amount of petroleum ether three times, 2 hours each time, combine the extracts, filter under reduced pressure, and evaporate the solvent to form a petroleum ether extract. The extract is dissolved in dimethylformamide to prepare a medicinal solution to be used, and added to the water in which the snails live, where the content of dimethylformamide does not exceed 0.5mL / 100mL of water.

Embodiment 2

[0029] Example 2: Weigh 100 g of dried ginkgo biloba exocarp, pulverize, and extract 5 times the amount of ethyl acetate under reflux at 75°C for three times, 2 hours each time, combine the extracts, filter under reduced pressure, and volatilize the solvent into ethyl acetate extract. The extract is dissolved in dimethylformamide to prepare a medicinal solution to be used, and added to the water in which the snails live, where 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, extract 5 times of ethanol under reflux at 70°C for 3 hours each time, combine the extracts, filter under reduced pressure, and volatilize the solvent to form an ethanol extract. The extract is dissolved in dimethylformamide to prepare a medicinal solution to be used, and added to the water in which the snails live, where the content of dimethylformamide does not exceed 0.5mL / 100mL of water.

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PUM

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Abstract

A vegetative insecticide for killing on comelania is the extract of the gingko exotesta in petroleum ether, or ethyl acetate, or alcohol, which is prepared through pulverizing and extracting.

Description

Technical field [0001] The present invention relates to pesticides, in particular to a plant molluscicide and its preparation method and use method. Background technique [0002] Schistosomiasis is a disease caused by humans or mammals infected with schistosomiasis. It is a severe acute infectious disease. If it is not effectively controlled, the patient will gradually lose the ability to work until life is endangered. [0003] Currently, there are approximately 810,000 schistosomiasis patients in China. According to statistics from the health department, the areas where schistosomiasis has not yet been controlled in China are mainly concentrated in the 110 counties (cities, districts) in the 7 provinces of Hunan, Hubei, Jiangxi, Anhui, Jiangsu, Sichuan, and Yunnan in the Yangtze River Basin. The population is about 60 million. The severely affected areas are mainly the Jianghan Plain, the Dongting Lake area, the Poyang Lake area, the beach areas along the Yangtze River, and some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/00A01P9/00A01N65/06
CPCY02A50/30
Inventor 杨小明陈盛霞陈钧张蓉仙谢吉民
Owner JIANGSU UNIV