An attractant, insecticidal gel bait and a brush-on insecticide

Abstract

The present application relates to a kind of attractant, insecticidal gum bait and brush type insecticide, it is related to daily chemical technical field.The attractant includes at least one of caryophyllene, 1, 3-dihydroxypropanone or 2-amino-3-methylbutyric acid.The attractant is colorless and transparent and has good fluidity, has strong attractant to cockroach, using the attractant can be prepared to obtain the appearance transparent insecticidal gum bait, to solve the problem that conventional bait has color, leading to ground, wall is not beautiful.The insecticidal gum bait can be distributed in many places by the way of brushing, not only can be film-formed in ground, wall and other areas, make drug component adhere to the surface of application area, but also can be washed clean afterwards, improve the convenience of use, and compared with conventional bait box, gum bait, granular point distribution mode, has higher killing rate to cockroach or other pests, provide a kind of new insecticidal gum bait product.

Description

Technical Field

[0001] This invention relates to the field of daily chemical technology, and in particular to an attractant, an insecticidal gel bait, and a brush-on insecticide. Background Technology

[0002] Cockroach bait is a type of pesticide formulation containing insecticidal ingredients that is attractive and palatable to cockroaches. Compared to commonly used cockroach-killing formulations such as aerosols, sprays, and suspensions, it has advantages such as long-lasting effect, environmental friendliness, safety and convenience, and a better user experience. It is an irreplaceable cockroach-killing product, especially in places where aerosols, sprays, and suspensions are used in a sensitive manner, such as home kitchens, commercial kitchens, food storage rooms, and shopping malls.

[0003] Cockroach bait comes in several forms. First, there are boxed cockroach baits, which come in a plastic box and contain solid attractants. Because of the protective box, they are less likely to be accidentally ingested by children and pets, making them particularly suitable for families with children and pets. The disadvantages are that they can only be distributed at a limited number of locations and are relatively expensive. Second, there are cockroach gel baits, where the contents are a semi-fluid colloid, packaged in syringes or open boxes. The advantage is that they can be distributed at multiple points, but the disadvantages are that application is time-consuming and laborious, inconvenient to use, and unsightly. Third, there are cockroach granules, where the contents are powder or small granules. The advantage is that they are low-cost and inexpensive, but the disadvantage is that they are not clean and can be easily ingested by children or pets. To solve the problem of the unsightly appearance of commonly used cockroach baits, cockroach gel baits need to be made colorless and transparent without losing their attractant effect. However, currently commonly used attractants mostly use grains or proteins that attract cockroaches, and these are generally colored. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an attractant that is colorless and transparent with good fluidity and strong attraction to cockroaches. Using this attractant, transparent insecticidal gel baits can be prepared, thus solving the problem that conventional baits are colored, resulting in unsightly surfaces such as floors and walls.

[0005] The present invention provides an attractant comprising at least one of caryophyllene, 1,3-dihydroxyacetone, or 2-amino-3-methylbutyric acid.

[0006] During the research process, the inventors discovered that to solve the problems of conventional insecticide baits being colored and having an unclean appearance, the insecticide gel bait needs to be transparent. Considering that the insecticide gel bait is a water-based fluid colloid, attractants such as grains and proteins cannot be added. After a large number of experiments, the inventors screened out the above-mentioned water-soluble raw materials other than sugars to form the attractant, which not only requires a low dosage but also has a strong attraction.

[0007] In one embodiment, the attractant comprises the following raw materials in parts by weight:

[0008]

[0009] The attractant formed by combining the above-mentioned ingredients has a strong attraction power and a good overall attraction effect on various cockroaches (German cockroach, American cockroach, Australian cockroach, and their larvae, which have different feeding preferences).

[0010] The present invention also provides an insecticidal gel bait, comprising an insecticide, a film-forming agent and the attractant, wherein the film-forming agent comprises polyvinyl alcohol and polyvinyl alcohol copolymer, and the polyvinyl alcohol copolymer comprises polyvinyl alcohol-octanoic acid copolymer and / or polyvinyl alcohol-lactic acid copolymer;

[0011] The weight ratio of the insecticide, attractant, and film-forming agent is (0.1-10) parts: (0.1-1.0) parts: (2-10) parts.

[0012] During their research, the inventors discovered that a film-forming agent in the formulation is crucial for achieving the aforementioned transparent, spreadable insecticidal gel bait. On one hand, the film-forming agent needs to be water-soluble so that users can easily clean the gel bait adhering to the floor or walls. On the other hand, considering that the application areas of the insecticidal gel bait are places prone to pests and cockroaches, and these areas are mostly wet areas such as near floor drains, sewer pipes, and bathroom corners, if the film-forming agent is too easily dissolved in water, the insecticidal gel bait will be quickly washed away by water in the application area, resulting in poor durability. Therefore, a polyvinyl alcohol copolymer is used to improve the water solubility of polyvinyl alcohol, allowing the insecticidal gel bait to be coated on surfaces such as floors and walls to form a film containing the drug, and then easily removed by washing after killing cockroaches. This insecticidal gel bait can be applied to multiple areas by brushing. It can form a film on surfaces such as the ground and walls, allowing the drug ingredients to adhere to the surface of the application area. It can also be washed off with water afterward, improving the convenience of use. Compared with conventional bait boxes, gel baits, and granular dot distribution methods, it has a higher killing rate for cockroaches or other pests, providing a new type of insecticidal gel bait product.

[0013] In one embodiment, the weight ratio of the polyvinyl alcohol copolymer to the polyvinyl alcohol is 1 part: (0.8-1.2) parts; the polyvinyl alcohol copolymer includes polyvinyl alcohol-octanoic acid copolymer and polyvinyl alcohol-lactic acid copolymer.

[0014] In one embodiment, the method for preparing the polyvinyl alcohol copolymer includes the following steps: adding polyvinyl alcohol to an organic solvent, mixing, heating, dispersing and melting, adding octanoic acid and lactic acid, and heating to azeotropic under the action of a catalyst to carry out an esterification reaction.

[0015] The organic solvent (e.g., toluene) is chosen in the above-mentioned preparation method of polyvinyl alcohol copolymer mainly because the thermal decomposition temperature of polyvinyl alcohol is low, which is 130-200℃, while the melting temperature is 200℃. By using an organic solvent (e.g., toluene) to azeotropically react with water, octanoic acid, and lactic acid, the intermolecular forces of polyvinyl alcohol can be reduced, thereby lowering the melting temperature of polyvinyl alcohol.

[0016] Meanwhile, the preparation method of the above-mentioned polyvinyl alcohol copolymer uses octanoic acid and lactic acid to form a copolymer with polyvinyl alcohol because: copolymerizing polyvinyl alcohol (PVA) with organic acids can improve the hydrophilicity of PVA polymers, allowing for better integration with water-based components in the formulation. Conventional polyvinyl alcohol copolymers, such as those formed from polyvinyl alcohol and acetic acid, have an odor that repels cockroaches. This is partly due to the irritant properties of residual acetic acid, and partly due to the solvents and additives used in the polymerization of polyvinyl alcohol and acetic acid. Therefore, although other acids such as hydrochloric acid and acetic acid may modify polyvinyl alcohol, they will also affect the overall attractiveness of insecticidal gel baits. Octanoic acid and lactic acid are acidic substances that, when used in appropriate amounts, have a certain attraction effect on cockroaches. These two acids are relatively volatile; after copolymerization with PVA, due to incomplete reaction, the free organic acids remaining between the copolymer molecules still have an attractant effect. Furthermore, these two acids are encapsulated within the copolymer, significantly reducing volatility and extending the effective period. Simultaneously, using octanoic acid and lactic acid instead of other organic acids such as acetic acid can reduce the irritant properties of the PVA copolymer. Polyvinyl alcohol and its octanoic acid or lactic acid copolymers have appropriate water solubility, good biocompatibility, and low repellent properties. Appropriate water solubility specifically means that these polymers can dissolve in water at room temperature within minutes or tens of minutes, allowing for the preparation of water-based solutions. Water is one of the main substances cockroaches consume during foraging; water-containing baits are more likely to become targets for cockroaches when water is scarce. Good biocompatibility is manifested in the fact that when cockroaches feed on or pass over the gel bait coating, the gel bait easily adheres to the cockroach's skin, forming a film that does not easily detach from the insect's body. This prolongs the contact time between the drug and the cockroach's skin, making the cockroach more susceptible to poisoning and death. Low repellency is manifested in the fact that cockroaches do not readily exhibit repellent behavior towards such polymeric compounds; that is, they do not exhibit avoidance, repulsion, or rejection behavior due to the odor of the polymer material. This lays the foundation for the attractant to exert its attraction properties.

[0017] In one embodiment, the organic solvent is toluene, and in the preparation method of the polyvinyl alcohol copolymer, the weight ratio of polyvinyl alcohol, octanoic acid, lactic acid and catalyst is (90-110) parts: (10-25) parts: (15-25) parts: (4-8) parts; the molecular weight of the polyvinyl alcohol is 25,000-35,000.

[0018] Polyvinyl alcohol copolymers prepared using polyvinyl alcohols with the molecular weights specified above can significantly improve the water solubility of polyvinyl alcohol.

[0019] In one embodiment, the method for preparing the polyvinyl alcohol copolymer further includes concentration and washing after esterification reaction;

[0020] The heating includes oil bath heating to 115-125°C, and the esterification reaction takes 2-3 hours.

[0021] In one embodiment, the insecticidal gel bait further includes a thickener, a sweetener, a preservative, and a humectant;

[0022] The weight ratios of the insecticide, attractant, film-forming agent, thickener, sweetener, preservative, and humectant are shown below:

[0023]

[0024] In one embodiment, the insecticide includes fipronil, the thickener includes at least one of carrageenan, xanthan gum, guar gum, and sodium carboxymethyl cellulose, the sweetener includes at least one of honey, maltose, fructose, and lactose, the preservative includes at least one of sodium benzoate and potassium sorbate, and the humectant includes at least one of glycerin and sorbitol.

[0025] The present invention also provides a brush-applied insecticide, comprising a brushing device and the insecticidal gel bait, wherein the brushing device comprises:

[0026] The bottle body includes a bottle frame and a bottle bottom. One end of the bottle frame is connected to the bottle bottom, and the other end of the bottle frame has an opening. The bottle frame and the bottle bottom together enclose a cavity for holding the insecticidal gel bait.

[0027] A brush includes a connector and a brush head. The brush head is connected to the bottle body via the connector, which is rod-shaped or tubular. If the connector is rod-shaped, it passes through the bottle opening and is inserted into the bottle body. The brush head is connected to one end of the connector near the bottom of the bottle. If the connector is tubular, one end of the connector communicates with the bottle opening, and the other end of the connector faces the same direction as the bottle opening and is connected to the brush head.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention discloses an attractant, an insecticidal gel bait, and a brush-applied insecticide. The attractant is colorless, transparent, has good fluidity, and strong attraction. The insecticidal gel bait prepared using this attractant is transparent and a fluid colloid, solving the problem of conventional colored baits causing unsightly surfaces like floors and walls. This insecticidal gel bait can be applied in multiple locations by brushing, forming a film on surfaces such as floors and walls, allowing the drug components to adhere to the surface of the application area. It can also be washed off with water afterward, improving ease of use. Furthermore, compared to conventional bait boxes, gel baits, and granular dot-distribution methods, it has a higher kill rate against cockroaches and other pests, providing a novel insecticidal gel bait product. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the coating device in Example 2, where 1 is the bottle body, 21 is the brush handle, 211 is the handle, and 22 is the brush head;

[0031] Figure 2 The graph shows the test results of the cockroach knockdown experiment in Experiment Example 1. The curves from top to bottom are: Sample Insecticide Gel Bait 1, Control Insecticide Gel Bait 6, and Bayer. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] source:

[0035] Unless otherwise specified, all reagents, materials, and equipment used in this embodiment are commercially available; unless otherwise specified, all experimental methods are conventional experimental methods in this field.

[0036] Example 1

[0037] An insecticidal gel bait.

[0038] I. Preparation of polyvinyl alcohol copolymer.

[0039] 1. The preparation method of polyvinyl alcohol copolymer includes the following steps:

[0040] Toluene (an organic solvent) is added to a container, followed by polyvinyl alcohol. The mixture is stirred and heated in an oil bath to 120°C to disperse and melt the mixture, thus obtaining a mixed solution.

[0041] Slowly add organic acids (such as octanoic acid, lactic acid, etc.) to the mixed solution, using concentrated sulfuric acid as a catalyst, and continue to heat slowly to azeotropically to carry out the esterification reaction. After reacting for 2-3 hours, stop heating to obtain the reaction solution.

[0042] The reaction solution was concentrated by rotary evaporation to obtain a distilled substrate, which was then cooled, washed with ethanol, and then washed with an ice-water mixture to obtain a polyvinyl alcohol copolymer.

[0043] Three polyvinyl alcohol copolymers were prepared using the above method. The raw materials and their weight proportions are shown in the table below:

[0044] Table 1. Raw materials and dosage of polyvinyl alcohol copolymers

[0045]

[0046] 2. Test water solubility.

[0047] (1) Detection method: Take the polyvinyl alcohol copolymer prepared in the previous step as the test sample, add 5 parts of the test sample to 100 parts of water, stir at 300 rpm for several minutes, and observe whether the system is uniform and clear every 5 minutes.

[0048] (2) The results of the water solubility test are shown in the table below:

[0049] Table 2 Water solubility test results

[0050]

[0051] Results analysis: The copolymers had longer dissolution times, but all of them were soluble, meeting the product requirements.

[0052] 3. Test biocompatibility.

[0053] (1) Detection method: Ten adult German cockroaches (half male and half female) were anesthetized with carbon dioxide. The test solution (5 parts of raw material were weighed according to the table below, added to 97 parts of water, and stirred slowly for 3 hours to form the test solution) was pipetted onto the abdomen of the German cockroaches. The amount of liquid added was 2 μL, and the weight was measured. After waiting for 30 minutes, the insects were rinsed with 3 ml of water three times. After waiting for 60 minutes, the weight was measured again to obtain the weight of polyvinyl alcohol and its copolymer remaining on the abdomen of the German cockroaches.

[0054] (2) The results of the biocompatibility test are shown in the table below:

[0055] Table 3 Biocompatibility test results

[0056]

[0057] Results Analysis: As shown in the table above, polyvinyl alcohol copolymers have a high residue rate, indicating that after dissolving in water, they penetrate the cockroach's exoskeleton, gradually forming a film that is not easily washed away by water, demonstrating good biocompatibility. Although polyvinyl alcohol has better water solubility, it is easily washed away after film formation, and its biocompatibility is not as good as its copolymers. Xanthan gum and carrageenan have poor biocompatibility, and their active ingredients are easily detached when used alone.

[0058] 4. Detect biological repellency.

[0059] (1) Detection method: Filter paper was laid at the bottom of a plastic test box with dimensions of 0.4m*0.6m*0.5m. The filter paper was tightly bonded to the bottom of the test box with double-sided tape around the edges. A dividing line was drawn horizontally along the center. One half of the filter paper was left untreated as the control end, and the other half was coated with the sample as the sample end. The amount of the sample coated was controlled by the reduction method to be 2g±0.05g. Thirty German cockroaches, half male and half female, were placed in the test box and left to stand for 2 hours. The number of German cockroaches that remained on the sample end was observed.

[0060] (2) The results of the biological repellency test are shown in the table below:

[0061] Table 4 Results of biological repellency test

[0062]

[0063] Note: Experiments 1-5 above were performed in parallel for each raw material 5 times.

[0064] Results Analysis: Based on biological repellency data, polyvinyl alcohol (PVA), PVA-octanoic acid copolymer, and PVA-lactic acid copolymer exhibit good biological properties, meaning cockroaches do not show significant repellency towards these polymers. In contrast, raw materials such as PVA-acetic acid copolymer and polyacrylic acid provide some repellency to cockroaches, indicating that cockroaches dislike the odor of these polymers. The PVA-octanoic acid copolymer and PVA-lactic acid copolymer of SR-2 can be polymerized individually or co-polymerized.

[0065] II. Preparation of insecticidal gel baits without pesticides.

[0066] The components including polyvinyl alcohol-octanoic acid copolymer and polyvinyl alcohol-lactic acid copolymer are selected as polyvinyl alcohol copolymer.

[0067] Dissolve the preservative in water (solvent), then add the thickener and film-forming agent (a mixture of polyvinyl alcohol and polyvinyl alcohol-octanoic acid copolymer, polyvinyl alcohol-lactic acid copolymer), stir for 1-2 hours, then add the sweetener, attractant, and humectant, and stir evenly to obtain an insecticidal gel bait without pesticides. Since this gel bait is used to test attraction and palatability, if pesticides are added, the lethality rate will be too fast, making it impossible to conduct effective attraction and palatability tests. Therefore, this insecticidal gel bait does not contain pesticides and is stored in a sealed container.

[0068] Meanwhile, conventional insecticidal gel baits often use sugary substances such as grains and proteins to attract cockroaches, and these substances are basically colored, so the attractants cannot achieve a colorless and invisible effect. In order to solve the problem that conventional insecticidal gel baits are colored, resulting in an unclean appearance after application and easy accidental ingestion, the inventors required that the insecticidal gel bait be transparent and colorless. At the same time, since the application method is to brush the bait, the fluidity of the insecticidal gel bait system must also be taken into account. Therefore, the inventors screened a large number of raw materials and obtained the following water-based raw materials to form the attractant. The following shows some of the attractant formulations. The attraction effect of the insecticidal gel bait without insecticide formed by using this attractant will be tested through biological testing.

[0069] In this embodiment, the raw materials and dosages of the attractant, film-forming agent, thickener, sweetener, preservative, and humectant are shown in the table below.

[0070] Table 5. Raw materials and weight parts of insecticide-free insecticidal gel bait

[0071]

[0072] III. Preparation of insecticidal gel bait.

[0073] The components selected include polyvinyl alcohol-octanoic acid copolymer and polyvinyl alcohol-lactic acid copolymer as polyvinyl alcohol copolymer.

[0074] The insecticide and preservative are dissolved in water (solvent), then a thickener and a film-forming agent are added, and the mixture is stirred for 1-2 hours. Next, a sweetener, attractant, and humectant are added, and the mixture is stirred until homogeneous to obtain the insecticidal gel bait. In this embodiment, the raw materials and dosages of the attractant, film-forming agent, thickener, sweetener, preservative, and humectant are shown in the table above. The insecticide raw material is fipronil, and the dosage is 5 parts.

[0075] The prepared insecticidal gel baits are sample insecticidal gel bait 1, sample insecticidal gel bait 2, sample insecticidal gel bait 3, sample insecticidal gel bait 4, sample insecticidal gel bait 5, sample insecticidal gel bait 6, and control insecticidal gel bait 1, control insecticidal gel bait 2, control insecticidal gel bait 3, control insecticidal gel bait 4, control insecticidal gel bait 5, and control insecticidal gel bait 6.

[0076] Example 2

[0077] A type of insecticide that can be applied by brushing.

[0078] I. The brush-applied insecticide includes the insecticidal gel bait prepared in step three of Example 1 and the matching brushing device.

[0079] In this embodiment, the coating device is as follows: Figure 1 As shown, it includes: bottle body 1 and brush.

[0080] Bottle 1 consists of a body and a bottom. One end of the body is connected to the bottom, and the other end has an opening for inserting a brush. The cavity formed by the body and bottom together is used to hold the insecticidal gel bait.

[0081] The brush consists of a rod-shaped connector (i.e., brush handle 2) and a brush head 22. The brush handle 2 passes through an opening and is inserted into the bottle body 1. The brush head 22 is fixed to the end of the brush handle 2 facing the bottom of the bottle. A handle 211 is also provided at the end of the brush handle 2 facing away from the bottom of the bottle. The handle 211 is a sphere, a cube, or other easily grippable free body, and its cross-section is larger than the bottle opening. When the brush is not in use, the handle 211 can block the bottle opening, making it sealed. In this embodiment, the handle 211 is a cube.

[0082] II. Instructions for using this brush-on insecticide.

[0083] When using, dip the brush head 22 into the insecticidal gel bait inside the bottle and apply it evenly in a line to areas where cockroaches are likely to pass through or inhabit, such as corners of walls, cabinet corners, ceiling edges, drain pipe openings, sewer openings, around trash cans, around doorways, around balconies, and the inner edge of dining tables.

[0084] When not in use, insert the brush back into the bottle and use the handle at one end of the brush to block the bottle opening, thus sealing the bottle and preventing the insecticide gel bait from evaporating, oxidizing, or becoming contaminated.

[0085] This embodiment utilizes a brush-applied insecticide, offering several advantages: Cockroach baits with protective cases are less prone to multi-point application, are located further from cockroach habitats, and are less likely to be encountered or consumed by cockroaches. Existing cockroach gel baits employ a "spot-like" application method, which is labor-intensive, difficult to control in dosage, results in a small contact area with cockroaches, and has an unattractive appearance. Sprays (aerosols, sprays) have a strong odor, are unfriendly to humans and the environment, and have poor persistence. The insecticide gel bait of this embodiment is invisible and transparent, applied in a comprehensive, brush-applied manner, making it easy for cockroaches to access and consume. The insecticide kills cockroaches rapidly with a high mortality rate, has no unpleasant odor, is transparent as if nothing is there, has high aesthetic appeal, and offers convenient application and easy dosage control. It is a novel formulation that can replace existing baits and gel baits.

[0086] Example 3

[0087] A type of insecticide that can be applied by brushing.

[0088] The brush-applied insecticide includes the insecticidal gel bait prepared in step three of Example 1 and the matching brushing device.

[0089] In this embodiment, the coating device includes a bottle and a brush.

[0090] The bottle consists of a body and a bottom. One end of the body is connected to the bottom, and the other end has an opening. The cavity formed by the body and bottom together is used to hold the insecticidal gel bait.

[0091] The brush consists of a tubular connector and a brush head. One end of the connector is open and connected to the opening of the bottle body, while the other end is open in the same direction as the opening of the bottle body. It is a hole and is fixedly connected to the brush head.

[0092] II. Instructions for using this brush-on insecticide.

[0093] When using, squeeze the bottle, and the insecticidal gel bait inside will be squeezed out through the perforated opening via the tubular connector, soaking the brush head. The user holds the bottle and applies the insecticidal gel bait in a line evenly to areas where cockroaches are likely to pass by or inhabit, such as corners of walls, cabinets, ceiling edges, drain openings, sewer openings, around trash cans, around doorways, around balconies, and the inner edge of dining tables.

[0094] When not in use, stop squeezing the bottle, and the insecticidal gel bait inside will retract from the tubular connector back into the cavity of the bottle.

[0095] Experimental Example 1

[0096] I. Biological tests were conducted on the insecticide gel bait samples 1-6 and control samples 1-6 prepared in Example 1 that do not contain insecticides.

[0097] 1. Attractant test of cockroach bait without insecticide.

[0098] (1) Test insects.

[0099] Cockroaches: German cockroach, 2-week-old adults, half male and half female, fasted in conical flasks or beakers for 12-24 hours; American cockroach, adults, half male and half female.

[0100] (2) Test conditions.

[0101] Temperature: (26±1)℃, Relative humidity: (60±10)%

[0102] (3) Instruments and reagents.

[0103] Plastic box (0.4m*0.6m*0.5m), petri dish (9cm inner diameter), stopwatch, scissors, cotton, mouse feed, petroleum jelly.

[0104] (4) Test steps.

[0105] Feed count method: Take two of the bait to be tested and two of the standard bait, cut off the lid of the bait box with scissors, weigh them 10 minutes before the test, and keep 3 decimal places;

[0106] Take two plastic boxes, label them A and B. Apply a ring of Vaseline 5cm from the top of each box, and place absorbent cotton balls with a diameter of 1cm in the center of each box.

[0107] Place 30 cockroaches (fasted for 12-24 hours) in each box. 10 minutes after placing the cockroaches, place the bait to be tested on both sides of the cotton ball at 15cm intervals and start timing. The bait placement in box B should be reversed from box A, but otherwise the same.

[0108] The number of cockroaches that feed on each bait is recorded every 1 minute, and the experiment ends after 15 minutes.

[0109] After the test is completed, weigh each bait within (30-40) minutes, keep 3 decimal places, and calculate the total number of cockroaches consumed.

[0110] After the experiment, the cockroaches inside the box were killed with boiling water, and the box was cleaned.

[0111] Swap the bait positions and repeat the experiment (they can be done simultaneously), and take the average of the two experimental results.

[0112] (5) Calculation method.

[0113] The formula for calculating the ratio of food intake to number of food items is as follows:

[0114]

[0115] In the formula: T is the number of feeds taken – the attractiveness of the test bait relative to the standard bait; NA is the number of cockroaches that feed on the test bait in box A within 15 minutes; NA is the standard bait in box A within 15 minutes; NB is the number of cockroaches that feed on the test bait in box B within 15 minutes; NB is the standard bait in box B within 15 minutes.

[0116] The formula for calculating the food intake ratio is as follows:

[0117]

[0118] In the formula: MA (Test) – Amount of test bait consumed in box A, g; MA (Standard) – Amount of standard bait consumed in box A, g; MB (Test) – Amount of test bait consumed in box B, g; MB (Standard) – Amount of standard bait consumed in box B, g.

[0119] 2. Results of seduction test.

[0120] Table 6 Results of Seduction Tests

[0121]

[0122] Note: The numbers 1-15 in the table header represent the minutes.

[0123] II. The insecticidal gel bait samples prepared in Example 1, including insecticidal gel bait 1, comparative insecticidal gel bait 6, and Bayer 2.15% imidacloprid cockroach bait (purchased from JD.com), were tested.

[0124] The specific testing method follows the national standard GB / T13917.1. On the first day, count the number of German cockroaches knocked down (including those killed) every 1-2 hours. Continue counting daily until the 5th day. On the 12th day, count the number of dead German cockroaches. The results are shown in the table below. Figure 2 As shown.

[0125] Table 7. Test results of sample insecticidal gel bait 1, comparative insecticidal gel bait 6, and Bayer product.

[0126]

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0130] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An insecticidal gel bait, characterized in that, Including insecticides, attractants, film-forming agents, thickeners, sweeteners, preservatives, and humectants; The weight ratios of the insecticide, attractant, film-forming agent, thickener, sweetener, preservative, and humectant are shown below: Insecticide 0.1-10 parts Attractant 0.1-1.0 parts 2-10 parts of film-forming agent Thickener 20-50 parts 150-350 parts sweetener 5-15 parts of preservative 50-150 parts of moisturizer; The attractant comprises the following raw materials in parts by weight: Caryophyllene 0.01-0.1 parts 1. 0.01-0.1 parts of 3-dihydroxyacetone 0.05-3 parts of 2-amino-3-methylbutyric acid; The film-forming agent includes polyvinyl alcohol and polyvinyl alcohol copolymer, wherein the weight ratio of the polyvinyl alcohol copolymer to the polyvinyl alcohol is 1 part: (0.8-1.2) parts; the polyvinyl alcohol copolymer includes polyvinyl alcohol-octanoic acid copolymer and polyvinyl alcohol-lactic acid copolymer; The insecticide includes fipronil; the thickener includes at least one of carrageenan, xanthan gum, guar gum, and sodium carboxymethyl cellulose; the sweetener includes at least one of honey, maltose, fructose, and lactose; the preservative includes at least one of sodium benzoate and potassium sorbate; and the humectant includes at least one of glycerin and sorbitol.

2. The insecticidal gel bait according to claim 1, characterized in that, The preparation method of the polyvinyl alcohol copolymer includes the following steps: adding polyvinyl alcohol to an organic solvent, mixing, heating, dispersing and melting, adding octanoic acid and lactic acid, and heating to azeotropic under the action of a catalyst to carry out an esterification reaction.

3. The insecticidal gel bait according to claim 2, characterized in that, The organic solvent is toluene. In the preparation method of the polyvinyl alcohol copolymer, the weight ratio of polyvinyl alcohol, octanoic acid, lactic acid and catalyst is (90-110) parts: (10-25) parts: (15-25) parts: (4-8) parts; the molecular weight of the polyvinyl alcohol is 25,000-35,000.

4. The insecticidal gel bait according to claim 2, characterized in that, The method for preparing the polyvinyl alcohol copolymer also includes concentration and washing after esterification reaction; The heating includes oil bath heating to 115-125°C, and the esterification reaction takes 2-3 hours.

5. A brush-applied insecticide, characterized in that, The invention includes a brushing device and an insecticidal gel bait according to any one of claims 1-4, wherein the brushing device comprises: The bottle body includes a bottle frame and a bottle bottom. One end of the bottle frame is connected to the bottle bottom, and the other end of the bottle frame has an opening. The bottle frame and the bottle bottom together enclose a cavity for holding the insecticidal gel bait. A brush includes a connector and a brush head. The brush head is connected to the bottle body via the connector, which is rod-shaped or tubular. If the connector is rod-shaped, it passes through the bottle opening and is inserted into the bottle body. The brush head is connected to one end of the connector near the bottom of the bottle. If the connector is tubular, one end of the connector communicates with the bottle opening, and the other end of the connector faces the same direction as the bottle opening and is connected to the brush head.

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