CN103734155A - Cockroach bait gel - Google Patents

Abstract

The invention provides cockroach bait gel. The cockroach bait gel comprises a stomach toxicity component, a phagostimulant, a thickening stabilizer, a preservative, a moisturizer and water, wherein the phagostimulant contains cassava starch. Compared with the prior art, the cockroach bait gel has the following beneficial effects that 1, the cassava starch is first used as the phagostimulant to be applied to the cockroach bait gel, the palatability is good, the attractive force is strong, and the safety is strong; 2, the gel is stable and looks fine, and the cockroach bait gel is unlikely to go bad and free from radiating unpleasant smell; 3, the cockroach is attracted to take the cockroach bait gel initiatively, and the purpose for killing the cockroach through the stomach toxicity component can be realized; 4, the cockroach bait gel is particularly suitable for preventing German cockroach and has a good effect.

Description

A kind of cockroach-killing gel bait

technical field

The invention relates to the technical field of insecticides, in particular to a bait for killing cockroaches.

Background technique

Cockroaches are one of the typical sanitary pests, and their excrement and molting can contaminate food in storage, transshipment and processing places. Cockroaches can carry many pathogens. It has been confirmed that people may have some diseases after contact with them, such as diarrhea, dysentery, cholera, leprosy, plague, typhoid fever, and viral diseases such as polio. In addition, cockroaches can carry parasite eggs, which can cause allergic reactions. The ubiquity of cockroaches seriously affects the normal production and life of mankind.

At present, with the improvement of living standards, the requirements for environmental quality are getting higher and higher, and the control of cockroaches is getting more and more attention. The control of cockroaches is an important goal of sanitary pest control. At present, chemical control is still an important means. Early commonly used cockroach-killing products mainly include cockroach-killing aerosols, propellants, smoke sheets, cockroach incense and other dosage forms with pyrethroids as active ingredients. pollute. In recent years, insecticidal companies at home and abroad have introduced many new cockroach-killing dosage forms, including cockroach-killing bait blocks, cockroach-killing gel baits, post-it notes, pastes, and granules. Mixing pesticides, using the active feeding behavior of cockroaches to apply pesticides at fixed points, with high efficiency and little impact on the environment, has gradually become the main means of cockroach control.

The active foraging of cockroaches is the prerequisite for the effectiveness of the cockroach-killing gel bait, which requires a formulation with good food-attracting properties, so special requirements are put forward for the design of the formulation. According to literature reports, there are many prescriptions for cockroach-killing gel baits directly related to cockroaches, but the insecticidal active ingredients of some cockroach-killing gel baits are boric acid, natural pyrethrins, and pyrethroids. Since this type of insecticide has a repelling effect on cockroaches, and long-term use will produce drug resistance, it cannot be used as an active ingredient in stomach baits for a long time. Most of the food attractants used in the cockroach-killing gel bait are food that people eat daily, including honey, brown sugar, peanut oil, butter, corn flour, flour and the like. Honey, brown sugar, peanut oil, cream and other food-attracting ingredients are easy to oxidize and deteriorate in the air, giving off an unpleasant smell. Corn flour, flour and other ingredients are highly viscous, and dry out after water volatilization, which affects the quality of the paste. The cockroach-killing gel bait made of the above-mentioned materials is prone to change after being placed for a period of time, and often has phenomena such as flowing, hardening, air-drying, and becoming smelly, and the stealing rate is obviously low. Therefore, it is necessary to research and develop moisture-retaining properties, and the cockroach-killing gel bait product with high stability.

Contents of the invention

The invention provides a cockroach-killing gel bait with good moisture retention, high stability and good cockroach-killing effect.

The cockroach-killing gel bait provided by the invention comprises gastric poisoning components, food attractant, thickening stabilizer, preservative, moisturizing agent and water, and the food attractant includes tapioca starch.

In the present invention, cassava starch is used as a food attractant for the first time, and through further tests, the combination of cassava starch and biscuits has a good effect of killing cockroaches, and when the ratio of the two is 3:4, the effect of killing cockroaches is the best.

As a preference, the thickener is hydroxyethyl cellulose.

As a preference, the preservative is paraben complex ester.

Preferably, the humectant is glycerin.

The cockroach-killing gel bait provided by the present invention is composed of the following components in mass percentage: 0.05-0.1% of fipronil, 0.2-0.5% of paraben complex ester, 0.2-0.5% of hydroxyethyl cellulose, and 10.0-20.0% of glycerin %, tapioca starch 9.0~15.0%, biscuits 12.0~20.0%, and the balance is water.

Fipronil is a phenylpyrazole insecticide with a wide insecticidal spectrum. It mainly has gastric toxicity to pests, and also has contact killing and certain systemic effects. Its mechanism of action is to hinder insect γ-aminobutyric acid Controlled chloride metabolism, so it has high insecticidal activity against important pests such as aphids, leafhoppers, planthoppers, Lepidoptera larvae, flies and Coleoptera, has no phytotoxicity to crops, and has high safety; Paraben complex ester is a broad-spectrum and high-efficiency food preservative, which acts as a preservative; hydroxyethyl cellulose acts as a thickener and is used to keep the paste stable; glycerin is a humectant and acts as a moisturizing agent; tapioca starch is the Compared with corn flour and flour, the powder obtained by dehydration and drying after starch extraction has the characteristics of not easy gelatinization, good fluidity, high stability, and the appearance of paste is more delicate. Similarly, biscuits are used as food-attracting ingredients, and the research data shows that they are mixed with tapioca starch in a ratio of 4:3 to the paste prescription, which has good effect and high cost performance.

Due to the adoption of the above technical scheme, the present invention has the following beneficial effects compared with the prior art: 1. For the first time in the present invention, tapioca starch is used as an attractant ingredient in cockroach-killing gel bait, which has good palatability, strong attraction, and safety High; 2. The paste is stable, delicate in appearance, not easy to deteriorate and emit unpleasant odors; 3. To lure cockroaches to eat actively, and cooperate with stomach poison ingredients to achieve the purpose of killing cockroaches; 4. The present invention is especially suitable for the control of German cockroaches. The effect is good.

Description of drawings

Fig. 1 is the low-temperature stability experiment result of cockroach-killing gel bait of the present invention;

Fig. 2 is the high-temperature stability experiment result of the cockroach-killing gel bait of the present invention. the

Detailed ways

Example 1

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

Fipronil 0.05g, paraben complex ester 0.2g, hydroxyethyl cellulose 0.4g, glycerin 18.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method of cockroach-killing gel bait of the present invention is as follows:

According to the weight ratio of each raw material mentioned above, weigh the weight of each raw material respectively. Dissolve hydroxyethyl cellulose in glycerin and disperse for 30 minutes, add water to fully dissolve, and set aside; put tapioca starch, biscuits, fipronil, etc. into the previously prepared solution, stir for 2 hours, add paraben complex ester , and stir evenly to get the cockroach-killing gel bait of the present invention.

Example 2

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

Fipronil 0.1g, paraben complex ester 0.2g, hydroxyethyl cellulose 0.40g, glycerin 15.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method is the same as in Example 1.

Example 3

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

Fipronil 0.05g, paraben complex ester 0.3g, hydroxyethyl cellulose 0.4g, glycerin 18.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method is the same as in Example 1.

Example 4

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.1g of fipronil, 0.5g of paraben complex ester, 0.4g of hydroxyethyl cellulose, 20.0g of glycerin, 10.5g of tapioca starch, 14.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 5

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

Fipronil 0.05g, paraben complex ester 0.2g, hydroxyethyl cellulose 0.2g, glycerin 18.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method is the same as in Example 1.

Example 6

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.1g of fipronil, 0.5g of paraben complex ester, 0.5g of hydroxyethyl cellulose, 20.0g of glycerin, 10.5g of tapioca starch, 14.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 7

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.1g of fipronil, 0.3g of paraben complex ester, 0.2g of hydroxyethyl cellulose, 10.0g of glycerin, 12.0g of tapioca starch, 16.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 8

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

 Fipronil 0.1g, paraben complex ester 0.3g, hydroxyethyl cellulose 0.2g, glycerin 15.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method is the same as in Example 1.

Example 9

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.05g of fipronil, 0.3g of paraben complex ester, 0.2g of hydroxyethyl cellulose, 15.0g of glycerin, 12.0g of tapioca starch, 16.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 10

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.05g of fipronil, 0.5g of paraben complex ester, 0.2g of hydroxyethyl cellulose, 15.0g of glycerin, 12.0g of tapioca starch, 16.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 11

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.05g of fipronil, 0.5g of paraben complex ester, 0.2g of hydroxyethyl cellulose, 20.0g of glycerin, 12.0g of tapioca starch, 16.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 12

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.05g of fipronil, 0.5g of paraben complex ester, 0.5g of hydroxyethyl cellulose, 20.0g of glycerin, 12.0g of tapioca starch, 16.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 13

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

0.05g of fipronil, 0.5g of paraben complex ester, 0.5g of hydroxyethyl cellulose, 20.0g of glycerin, 15.0g of tapioca starch, 20.0g of biscuits, and the rest of water.

The preparation method is the same as in Example 1.

Example 14

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

 Fipronil 0.1g, paraben complex ester 0.5g, hydroxyethyl cellulose 0.5g, glycerin 20.0g, tapioca starch 15.0g, biscuit 20.0g, water balance.

The preparation method is the same as in Example 1.

Example 15

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

 Fipronil 0.1g, paraben complex ester 0.5g, hydroxyethyl cellulose 0.5g, glycerin 20.0g, tapioca starch 12.0g, biscuit 16.0g, water balance.

The preparation method is the same as in Example 1.

Example 16

  To prepare 100 grams of cockroach-killing gel bait, the following weights of raw materials are required:

 Fipronil 0.1g, paraben complex ester 0.5g, hydroxyethyl cellulose 0.5g, glycerin 10.0g, tapioca starch 9.0g, biscuit 15.0g, water balance.

The preparation method is the same as in Example 1.

1. In order to obtain the best formula of the cockroach-killing gel bait of the present invention, the applicant has carried out tests including paste stability, food attraction, and cockroach-killing:

1. Screening of food attractants

Experimental design: The comparative method was used in the experiment to observe the differences in feeding of cockroaches to different food attractants (tapioca starch, corn flour, soybean flour, biscuits, milk powder, etc.). Operation method: put 40 healthy cockroaches, put 2.00g of tapioca starch, corn flour, soybean flour, biscuits, and milk powder on the four sides to supply sufficient water. After being placed in a dark environment at 25-35°C for 24 hours, the remaining food was weighed, and three groups were parallelized. The results are shown in Table 1:

Table 1 Screening results of attractants

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The attractiveness of the five food attractants to cockroaches was as follows: butter biscuit>tapioca starch>corn flour>soybean flour>milk powder. Therefore, biscuits and tapioca starch are selected as food attractants, and the appropriate ratio is selected through the palatability test. Wherein cassava starch is an abundant local resource in Guangxi, and there is no bibliographical report on being applied in the cockroach-killing gel bait. the

Determination of the ratio of attractant

Tapioca starch has the characteristics of not easy gelatinization, good fluidity, high stability, and the appearance of the paste is more delicate, etc., and has a good food-attracting effect. As an attractant, biscuits are highly attractive to cockroaches, but the biscuits are relatively coarse, which can easily affect the quality of the paste. In the experiment, different ratios of cassava starch and biscuits were added to the glue bait, and the quality, stability, and food-attracting effect of the paste were observed to determine the optimal ratio. See Table 2 for the results.

Table 2 Screening results of the optimal ratio of food attractants

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When the ratio of tapioca starch to biscuits is 3:4, the appearance and stability of the paste are good, especially the amount of food intake has a certain synergistic effect. At the same time, considering the cost performance, 3:4 is selected as the food attractant Optimum ingredient ratio.

Thickening Stabilizer Screening

By fixing the percentage of other ingredients in the cockroach-killing gel bait, changing the type of thickening stabilizer, observing the stratification and water separation of the cockroach-killing gel bait with different stabilizers, and determining the optimal thickening and stability of the cockroach-killing gel bait agent. See Table 3 for the results. the

Table 3 Thickening stabilizer screening results

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The experimental results show that, through the thermal storage stability investigation, in the gel bait formulation system, hydroxyethyl cellulose is used as the thickening and stabilizing agent without water separation, and the effect is good. the

Screening of humectants

When the percentages of other ingredients in the cockroach-killing gel bait remained unchanged, the types of moisturizers were changed, and the effects of different moisturizers on the moisturizing performance of the cockroach-killing gel bait were compared to determine the best moisturizer for the cockroach-killing gel bait. See Table 4 for the results.

Table 4 Screening results of moisturizers

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The experimental results show that the cockroach-killing gel bait prepared with glycerin has the best properties, so glycerin is selected as the best moisturizing agent. the

Screening of preservatives

Fix the percentage of other ingredients in the cockroach gel bait, and prepare cockroaches containing different preservatives (sodium propylparaben, sodium butylparaben, complex paraben, potassium sorbate, sodium benzoate, etc.) Glue bait, through thermal storage stability investigation, observe the initial spoilage time of cockroach-killing gel bait, compare the initial spoilage time of different preservatives cockroach-killing gel bait, the results are shown in Table 5:

Table 5 Screening results of preservatives

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The initial spoilage time of cockroach-killing gel baits containing different preservatives (sodium propylparaben, sodium butylparaben, compound paraben, potassium sorbate, and sodium benzoate) were 28d, 34d, 49d, and 17d, respectively , 14d, paraben complex ester has the longest antiseptic time and good effect, choose paraben complex ester as the best preservative.

Low temperature stability test

Take the cockroach-killing gel bait prepared in Example 1, seal it, put it in the refrigerator at -8°C, and take it out every 15 days to measure the content of active ingredients. The measurement results are shown in FIG. 1 . It can be seen from Figure 1 that after 90 days at -8°C, the content of fipronil in the bait decreased slightly, but the change was within an acceptable range.

High temperature stability test

Store the cockroach-killing gel bait prepared in Example 1 in an incubator at 50±2°C, and observe the properties of the paste after 30 days; take it out every 15 days, measure the content of active ingredients by HPLC, and calculate the decomposition rate of the active ingredients. The measurement results are shown in FIG. 2 . It can be seen from Figure 2 that after heat storage for 30 days, the content of fipronil in the bait decreased slightly, but the decomposition rate was lower than 10%. the

Two, the drug efficacy test of cockroach gel bait of the present invention

The killing effect of this cockroach-killing gel bait to Blattella germanica is shown in table 6.

Table 6

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From the results in the table, the cockroach-killing gel bait prepared by the present invention has a good trapping and killing effect on the German cockroach, and the effect is good.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A cockroach-killing gel bait, comprising gastric poisoning components, food attractant, thickening stabilizer, preservative and moisturizing agent and water, is characterized in that: said food attractant comprises tapioca starch. 2. The cockroach-killing gel bait according to claim 1, characterized in that: the food attractant is tapioca starch and biscuits. 3. The cockroach-killing gel bait according to claim 2, characterized in that: the mass ratio of tapioca starch to biscuits in the food attractant is 3:4. 4. The cockroach-killing gel bait according to claim 1, characterized in that: the thickener is hydroxyethyl cellulose. 5. The cockroach-killing gel bait according to claim 1, characterized in that: the preservative is paraben complex ester. 6. The cockroach-killing gel bait according to claim 1, characterized in that: the moisturizing agent is glycerin. 7. The cockroach-killing gel bait according to any one of claims 1-6, characterized in that: the cockroach gel bait is composed of the following components in mass percentage: 0.05-0.1% of fipronil, paraben complex ester 0.2~0.5%, 0.2~0.5% hydroxyethyl cellulose, 10.0~20.0% glycerin, 9.0~15.0% tapioca starch, 12.0~20.0% biscuits, and the balance is water.

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