CN104255824A - Method for preparing cockroach insecticide tablets by Sichuan pepper essential oil - Google Patents

Abstract

The invention relates to a method for preparing cockroach repelling tablets from prickly ash essential oil. According to the ratio of 10-15ml of Zanthoxylum essential oil extract, 400ml of absolute ethanol, Tween 80100ml and 100-150g of agar, the Zanthoxylum bungeanum is pulverized with a pulverizer, soaked in distilled water, and extracted by steam distillation to obtain the Zanthoxylum essential oil extract for later use. ; First mix absolute ethanol and Tween 80 evenly, and then add pepper essential oil extract to obtain pepper essential oil insect repellent slow-release agent; add agar to distilled water, heat to dissolve, after cooling, the essential oil prepared in step 2 insect repellent slow-release agent; Add the release agent to the agar solution, stir while heating, mix well, and slowly pour it into a hollow cylindrical molding mold to make a columnar round strip; cut it into tablets; glue one side of the tablet to make a cockroach repellent tablet . The preparation process of the invention is simple, the cost is low, the application environment is diverse, and the repelling rate of the American cockroach and the German cockroach reaches 88-100%.

Description

Method for preparing cockroach repellent tablet from pepper essential oil

technical field

The invention relates to a method for preparing an insect-repelling tablet with the function of repelling cockroaches from prickly ash essential oil, and belongs to the technical field of preparation of anthelmintic drugs.

Background technique

Cockroach belongs to Insecta, Blattata, is a class of insects with a long history, and original cockroach appeared on the earth in the Silurian Period about 400,000,000 years ago. At present, there are mainly Periplaneta americana, Blattella germanica, Blattella black breast, Periplaneta australis and Periplaneta japonica that are closely related to human life. The most common ones in China are Periplaneta americana and Blattella germanica.

Cockroaches not only spread diseases, but also often bite other items, such as cotton and wool products, leather products, paper, books, etc. Therefore cockroach is not only a kind of sanitation pest, but also file pest and textile pest. Cockroaches also often get into electrical appliances such as computers, refrigerators, and communication equipment, causing electrical appliances to short-circuit and burn down.

One of the ways that humans deal with cockroaches at present is to clean the environment and cut off the food source of cockroaches, which is difficult to fully accomplish in real life; the 2nd is to use insecticides to kill cockroaches. Cockroaches are insects with very strong reproduction and survival abilities. Insecticides have never really solved the problem, and have also caused environmental pollution and drug resistance of cockroaches. The use of pesticides in certain places such as kitchens, food kitchens, food warehouses, etc. will have safety problems. For Buddhists, the concept of not killing animals also prevents them from using pesticides to deal with cockroaches. Therefore, the research on cockroach repellent has its practical significance. It can not only prevent cockroaches from invading target places, but also can be used in places where cockroaches are seriously infested and are not suitable for large-scale spraying of insecticides or complex environmental conditions or high hygiene requirements. , and can also be used to consolidate the control effect after intensive killing.

There has been some research on cockroach repellents. In 2002, Peterson studied the repelling activity of nepetalactone on German cockroaches. At a dose concentration of 80 μg/cm, E, Z-nepetalactone could achieve a repelling rate of 79.4%. In 1984, U.S. ScfivenR. etc. reported that eucalyptol contained in bay leaves and a nine-carbon chain compound contained in cucumber skin had a certain repelling effect on cockroaches. Singaporean Ngoh et al. studied the repellent activity of the main components of 9 kinds of plant volatile oils to Periplaneta americana, and the results showed that the order of repellent activity was: safrole > isosafrole > methyl eugenol > eugenol > isoeugenol; Some monoterpenoid volatile substances such as citronellal, citral, and geraniol also have good repellency to Periplaneta americana (Hao Huiling. Research progress of repellents in cockroach control. China Sanitation Insecticide Equipment, 2007, 13(6)). Domestic Hao Huiling (the repelling effect of four kinds of plant essential oils to German cockroach. Insect Knowledge, 2008, 45 (3)) has studied the repelling cockroach effect of four kinds of plant essential oils such as linalool, Han Zhaojiu etc. Research on the repellent activity of cockroaches. Zhonghua Sanitary Insecticide, 2012, 18 (4)) studied the repellent effect of 43 terpenoids. But regrettably do not see the commodity of repelling cockroach to come out at present. One of the reasons may be that most of the current research uses the filter paper immersion method, which tests the short-term response of cockroaches to direct stimulation of drugs, which has serious defects and cannot truly reflect the repellency of cockroaches to drugs. For this reason, on the basis of long-term research, we have invented a device and method that can relatively objectively and truly test the repellency of cockroaches to drugs in the actual living environment. Using this method, we studied the repellency of various plant essential oils to cockroaches, and invented a prickly ash essential oil product with good repellency to cockroaches.

Zanthoxylum bungeanum is a food seasoning commonly used by our people, and it can also be used as medicine, which has moderate effects of dispelling cold and warming. There are also manufacturers who extract its essential oil as a food flavoring agent, and among the people there is also the practice of adding pepper essential oil to hot water to soak their feet.

Invention content:

The object of the present invention is to provide a method for preparing an insect repellent that is non-toxic to human body and has repellent effect on cockroaches from prickly ash essential oil.

The technical scheme adopted for realizing the object of the present invention is as follows:

formula

preparation

1. Put the peppercorns in the refrigerator for 8 hours, crush them with a pulverizer, pass through a 40-mesh sieve, add distilled water to soak for 2-4 hours according to the ratio of solid-liquid volume ratio of 1:1, and extract the peppercorn essential oil extract by steam distillation spare.

The temperature adopted in the steam distillation method is controlled between 100°C and 110°C.

2. First mix the absolute ethanol and Tween 80 evenly, then add the reserve Zanthoxylum bungeanum essential oil extract, and after mixing evenly, make Zanthoxylum bungeanum essential oil deworming slow-release solution.

3. Add agar into distilled water at a ratio of 1 g: 30 ml of distilled water, heat to dissolve the agar completely, and when the agar solution is cooled to 35-50°C, add the essential oil deworming slow-release solution prepared in step 2 to the agar solution During heating, stir while heating, so that the essential oil insect repellent slow-release agent and the agar solution are evenly mixed, and then slowly poured into a hollow cylindrical molding mold, and after natural cooling and solidification, it is made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 5-10mm; apply adhesive to one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent containing pepper essential oil piece.

When in use, cut off the plastic film, peel off the covering film and stick the adhesive side to the corner of the wall, the bottom of the cabinet, etc., to play the role of repelling cockroaches.

The invention has simple preparation process, low cost and various applicable environments. The experimental results of the repelling rate of the cockroach repelling tablet prepared by the invention to the American cockroach show that the repelling rate of the cockroach repelling tablet to the American cockroach and the German cockroach reaches 88-100%, and the validity period of the tablet reaches more than 90 days.

Detailed ways

The present invention will be further described in the form of examples to facilitate a better understanding of the present invention, but the scope of the present invention will not be limited thereby.

Example 1:

formula

preparation

1. Put 100g of Zanthoxylum bungeanum in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add 100ml of distilled water, soak for 4 hours, and extract by steam distillation to obtain the Zanthoxylum bungeanum essential oil extract for later use.

The temperature used in the steam distillation method is 110°C.

2. First mix 400ml of absolute ethanol and 100 Tween 80 evenly, then add 15ml of Zanthoxylum bungeanum essential oil extract, mix well to make Zanthoxylum bungeanum essential oil insect repellent slow-release agent.

3. Add 450ml of distilled water to 150g of agar, and heat to dissolve the agar completely. When the agar solution is cooled to 45°C, add the essential oil insect repellent slow-release solution prepared in step 2 of 60 to the agar solution, and stir while adding, so that The essential oil insect repellent sustained-release liquid is mixed evenly with the agar solution, and then slowly poured into a hollow cylindrical molding mold, cooled naturally to solidify and made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 8 mm; glue one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent tablet containing pepper essential oil.

The insect repelling tablet prepared by the invention is used to carry out a control test, and the effect is good. When comparing, cut the plastic film, peel off the covering film, and stick the adhesive side to the corner, cabinet, etc. of a 10-square-meter family kitchen 1, and use 12 pieces in total; choose another 8 pieces next door. For a family kitchen of 2 square meters, this insect repellent patch is not used. The comparison time starts from June 20, and every 10 days is a statistical day. Every statistical day is counted and recorded at 11 o'clock and 12 o'clock in the evening to drive out cockroaches The effect is as follows:

Example 2

formula

preparation

1. Put 300g of Chinese prickly ash in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add 300ml of distilled water, soak for 3 hours, and use steam distillation to extract the Chinese prickly ash essential oil extract for later use.

The temperature used in the steam distillation method is 100°C.

2. First mix 1600ml of absolute ethanol and 400ml of Tween 80 evenly, then add 40ml of Zanthoxylum bungeanum essential oil extract, mix well to make Zanthoxylum bungeanum essential oil insect repellent slow-release agent.

3. Add 1200ml of distilled water to 400g of agar, and heat to dissolve the agar completely. When the agar solution is cooled to 35°C, take 40ml of the essential oil deworming slow-release solution prepared in step 2 and add it to the agar solution. Stir while adding to make the essential oil The insect repellent sustained-release solution is mixed evenly with the agar solution, and then slowly poured into a hollow cylindrical molding mold, cooled and solidified naturally, and made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 5mm; glue one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent tablet containing pepper essential oil.

The insect repelling tablet prepared by the invention is used to carry out a control test, and the effect is good. When comparing, cut the plastic film, peel off the covering film, and stick the adhesive side to the corner of a family kitchen 1 of 8 square meters, the bottom of the cabinet, etc., and use 8 pieces in total; choose another 8 pieces close to the next door. For a family kitchen of 2 square meters, this insect repellent patch is not used. The comparison time starts from June 15, and every 10 days is a statistical day, and every statistical day is counted and recorded at 11 o'clock and 12 o'clock in the evening to drive out cockroaches The effect is as follows:

Example 3

formula

preparation

1. Put 100g of Zanthoxylum bungeanum in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add 100ml of distilled water, soak for 2 hours, and extract by steam distillation to obtain the Zanthoxylum bungeanum essential oil extract for later use.

The temperature adopted in the steam distillation method is 105°C.

2. First mix 2000ml absolute ethanol and 500ml Tween 80 evenly, then add pepper essential oil extract, mix well to make pepper essential oil deworming slow-release liquid.

3. Add 1895ml of distilled water to 650g of agar, and heat to dissolve the agar completely. When the agar solution is cooled to 50°C, take 60ml of the essential oil deworming slow-release solution prepared in step 2 and add it to the agar solution, and stir while adding to make the essential oil The insect repellent sustained-release solution is mixed evenly with the agar solution, and then slowly poured into a hollow cylindrical molding mold, cooled and solidified naturally, and made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 10mm; glue one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent tablet containing pepper essential oil.

The worm sheet prepared by the invention is used to carry out the control test, and the effect is good. For comparison, cut the plastic film, peel off the covering film, and stick the adhesive side to the corner, cabinet, etc. of a 12-square-meter family kitchen 1, using a total of 15 pieces; choose another 6.5 pieces next door. For a family kitchen of 2 square meters, this insect repellent patch is not used. The comparison time starts from June 15, and every 10 days is a statistical day, and every statistical day is counted and recorded at 11 o'clock and 12 o'clock in the evening to drive out cockroaches The effect is as follows:

Example 4

formula

preparation

1. Put 200g of Zanthoxylum bungeanum in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add 200ml of distilled water, soak for 3 hours, and extract by steam distillation to obtain the Zanthoxylum bungeanum essential oil extract for later use.

The temperature used in the steam distillation method is 110°C.

2. Mix absolute ethanol and Tween 80 evenly, then add pepper essential oil extract, and mix well to make pepper essential oil insect repellent slow-release agent.

3. Add 450 ml of distilled water to 150 g of agar, heat to dissolve the agar completely, and when the agar solution is cooled to 35°C, add the essential oil insect repellent slow-release agent prepared in step 2 into the agar solution, and stir while adding to make the essential oil The insect repellent slow-release agent is evenly mixed with the agar solution, and then slowly poured into a hollow cylindrical molding mold, cooled and solidified naturally, and made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 5mm; glue one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent tablet containing pepper essential oil.

The worm sheet prepared by the invention is used to carry out the control test, and the effect is good. When comparing, cut the plastic film, peel off the covering film, and stick the adhesive side to the corner, cabinet, etc. of a 12-square-meter family kitchen 1, using a total of 25 pieces; choose another 12 pieces next door. For a family kitchen of 2 square meters, this insect repellent patch is not used. The comparison time starts from June 15, and every 10 days is a statistical day, and every statistical day is counted and recorded at 11 o'clock and 12 o'clock in the evening to drive out cockroaches The effect is as follows:

Example 4

formula

preparation

1. Put 300g of Chinese prickly ash in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add 300ml of distilled water, soak for 3 hours, and use steam distillation to extract the Chinese prickly ash essential oil extract for later use.

The temperature used in the steam distillation method is 100°C.

2. First mix the absolute ethanol and Tween 80 evenly, then add the extract of Zanthoxylum bungeanum essential oil, and after mixing evenly, make Zanthoxylum bungeanum essential oil insect repellent slow-release agent.

3. Add 450 ml of distilled water to 150 g of agar, heat to dissolve the agar completely, and when the agar solution is cooled to 40°C, add the essential oil insect repellent slow-release agent prepared in step 2 into the agar solution, and stir while adding to make the essential oil The insect repellent slow-release agent is evenly mixed with the agar solution, and then slowly poured into a hollow cylindrical molding mold, cooled and solidified naturally, and made into a columnar round bar.

4. Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 7 mm; glue one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach repellent tablet containing pepper essential oil.

The insect repelling tablet prepared by the invention is used to carry out a control test, and the effect is good. When comparing, cut the plastic film, peel off the covering film, and stick the adhesive side to the corner, cabinet, etc. of a 6.5-square-meter family kitchen 1, and use 15 pieces in total; choose another 6.5-square-meter next door. The family kitchen of 2 square meters does not use this insect repellent patch. The comparison time starts from June 15, and every 5 days is a statistical day. Every statistical day is counted and recorded at 11 o'clock and 12 o'clock in the evening to drive out cockroaches The effect is as follows:

Claims (3)

1. a kind of Zanthoxylum bungeanum essential oil prepares the method for cockroach deworming sheet, it is characterized in that: formula Zanthoxylum bungeanum essential oil extract 10～15ml Absolute ethanol 400ml Tween 80 100ml Agar 100～150g; preparation 1) Put the pepper in the refrigerator for 8 hours, crush it with a pulverizer, pass through a 40-mesh sieve, add distilled water to soak for 2 to 4 hours according to the ratio of solid to liquid volume ratio of 1:1, and use steam distillation to extract the pepper essential oil extract spare; 2) First mix absolute ethanol and Tween 80 evenly, then add pepper essential oil extract, and mix well to make pepper essential oil insect repellent slow-release agent; 3) Add agar to distilled water, heat to dissolve the agar completely, and when the agar solution is cooled to 35-50°C, add the essential oil insect repellent slow-release agent prepared in step 2 into the agar solution, and stir while adding to make the essential oil The insect repellent slow-release agent and agar solution are mixed evenly, then slowly poured into a hollow cylindrical molding mold, cooled naturally and solidified, and made into a columnar round bar; 4) Use a slicer to cross-cut the columnar round bar to make a coin-shaped tablet with a thickness of 5-10mm; apply adhesive to one side of the tablet, stick a film, and encapsulate it with a plastic film to make a cockroach-repellent containing pepper essential oil. Insect patch. 2. The method for preparing cockroach repelling tablets from Zanthoxylum bungeanum essential oil according to claim 1, characterized in that the temperature used in the steam distillation method is controlled between 100°C and 110°C. 3. the method that pepper essential oil according to claim 1 prepares cockroach deworming sheet is characterized in that described agar is added to distilled water, and the ratio of agar and distilled water is 1 gram of agar: 30 milliliters of distilled water.