CN113729018A

CN113729018A - Composite pesticide and preparation method thereof

Info

Publication number: CN113729018A
Application number: CN202111154416.5A
Authority: CN
Inventors: 陈文杰
Original assignee: Liyang Zhongnan Chemical Industry Co ltd
Current assignee: Liyang Zhongnan Chemical Industry Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-03

Abstract

The application relates to the technical field of pesticides, and particularly discloses a compound pesticide and a preparation method thereof. The composite pesticide is prepared from expanded powder and attractant according to the weight ratio of (1.2-1.6): 1, and the expansion powder comprises the following components in parts by weight: 150-250 parts of kaolin, 60-80 parts of expanding agent and 80-120 parts of poisoning agent. The expanding powder can damage the feeding membrane of lepidoptera pests, thereby reducing the barrier of the feeding membrane to the diffusion of the poisoning agent and improving the insecticidal efficiency of the compound insecticide.

Description

Composite pesticide and preparation method thereof

Technical Field

The application relates to the technical field of pesticides, in particular to a compound pesticide and a preparation method thereof.

Background

Lepidoptera is the second largest order of the insects next to coleoptera, most larvae of the lepidoptera feed on various plants, and common agricultural pests such as pieris rapae, cotton bollworms, fall webworms and soybean pod borers belong to the lepidoptera. A feeding membrane formed by compounding chitin and protein exists in the digestive tract of the lepidoptera insects, and after the lepidoptera insects feed, the food in the digestive tract is wrapped by the feeding membrane, and the food and food residues are discharged out of the body together after the food is digested.

In the related art, a compound pesticide is prepared from powder and an attractant according to the proportion of (8-10): 3, wherein the attractant is shortening, and the powder comprises the following components in parts by weight: 16-24 parts of a poisoning agent, 30-50 parts of flour, wherein the poisoning agent is dinotefuran or imidacloprid. When the composite pesticide is put into soil, the shortening oil attracts pests to eat the powder, and the poisoning agent in the powder is diffused into the pests through the alimentary canals of the pests to poison and die the pests, so that the effect of killing the pests is achieved.

In view of the above-mentioned related art, the inventors believe that although the poison of the related art can poison the pests, the powder is wrapped by the periphyton when the lepidoptera pests eat the powder. The powder is isolated from the digestive tract by the food-enclosing film, so that the diffusion of the poison is hindered, the effective speed of the poison is slowed down, and the insecticidal efficiency of the compound insecticide is influenced.

Disclosure of Invention

In the related technology, the powder is wrapped by the feeding film in the alimentary canal of the lepidoptera pests, so that the insecticidal efficiency of the compound insecticide is easily influenced. In order to improve the defect, the application provides a composite pesticide and a preparation method thereof.

In a first aspect, the present application provides a composite pesticide, which adopts the following technical scheme:

a composite insecticide comprising an expanding powder and an attractant in a ratio of (1.2-1.6): 1, and the expansion powder comprises the following components in parts by weight: 150-250 parts of kaolin, 60-80 parts of expanding agent and 80-120 parts of poisoning agent.

By adopting the technical scheme, compared with the related technology, the composite pesticide is obtained by adding the expanding agent into the formula of the powder, replacing flour with kaolin to obtain expanded powder, and mixing the expanded powder, the attractant and the flocculating agent. After the composite pesticide is put into soil, pests attract the expanded powder under the attraction of the attractant and wrap the expanded powder through the peritrophic membrane.

After the feeding film wraps the expansion powder, the kaolin in the expansion powder absorbs the water in the feeding film, so that the feeding film contracts, the expansion agent in the expansion powder expands, and the feeding film is subjected to expansion stress, so that the feeding film is broken due to local deformation. After the feeding membrane is broken, the expanded powder is aggregated in the alimentary canal of the pests to form powder agglomerates, the powder agglomerates after water absorption have enhanced viscosity, and the main component of the powder agglomerates is kaolin which cannot be digested and absorbed by the alimentary canal, so that the powder agglomerates can rapidly block the alimentary canal of the pests. After the alimentary canal of the pests is blocked, the appetite and the excretion function of the pests are inhibited, and the retention time of the poisoning agent in the pests is prolonged, so that the efficiency of killing the lepidoptera pests is improved.

Preferably, the expansion powder comprises the following components in parts by weight: 175-225 parts of kaolin, 65-75 parts of expanding agent and 90-110 parts of poisoning agent.

By adopting the technical scheme, the proportion of the expansion powder is optimized, and the efficiency of killing lepidoptera pests is improved.

Preferably, the poisoning agent is prepared from spinetoram and bacillus thuringiensis powder according to the ratio of 1: (2.2-2.6) by weight ratio.

By adopting the technical scheme, spinetoram has a paralysis effect on the nervous system of pests, can reduce the peristalsis frequency of the digestive tract of the pests, reduce the possibility that the pests discharge the powder agglomerate out of the body, and prolong the retention time of the powder agglomerate in the digestive tract of the pests. The bacillus thuringiensis preparation can perforate the alimentary canal of pests, and is helpful to enlarge the paralysis range of spinetoram on the nervous system of the pests. When spinetoram and bacillus thuringiensis powder are mixed according to the ratio of 1: (2.2-2.6) the ratio by weight is high in the efficiency of poisoning pests.

Preferably, the expanding powder also comprises 16-20 parts by weight of quartz powder.

By adopting the technical scheme, when the alimentary canal of the pests is blocked by the powder agglomerate, the quartz powder on the surface of the powder agglomerate cuts the inner wall of the alimentary canal of the pests, which is beneficial to accelerating the breaking speed of the alimentary canal of the pests, thereby promoting the absorption of the pests to the poisoning agent and improving the poisoning efficiency of the pests.

Preferably, the expansion powder also comprises 16-24 parts of persulfate by weight.

By adopting the technical scheme, the digestive tract of the lepidoptera insect can secrete strong alkaline digestive juice, and alkaline substances in the digestive juice can activate persulfate so as to decompose the persulfate to generate sulfate radicals. The sulfate radical free radical can destroy the protein in the feeding film, promote the separation of the protein and chitin in the feeding film, facilitate the acceleration of the cracking of the feeding film and improve the efficiency of killing lepidoptera pests.

Preferably, the expanding agent is formed by mixing nano iron powder and calcium bentonite according to the weight ratio of 1 (2.4-2.8).

By adopting the technical scheme, in the digestive tract of lepidoptera pests, the calcium bentonite expands after absorbing water and releases a part of calcium ions; persulfate is activated by alkaline substances in the digestive juice to generate sulfate radicals, and the sulfate radicals oxidize the nano iron powder into iron oxide and simultaneously generate sulfate ions; sulfate ions are combined with calcium ions released by the calcium bentonite to generate calcium sulfate, and the calcium sulfate absorbs water to form dihydrate gypsum crystals. The processes of converting calcium sulfate into dihydrate gypsum, absorbing water by calcium bentonite and converting iron powder into iron oxide all generate volume expansion, and the expansion of the calcium sulfate, the calcium bentonite and the iron powder can be mutually promoted, so that the damage to the peritrophic membrane is facilitated, and the insecticidal effect of the composite insecticide is improved.

Preferably, the expanded powder further comprises 20-40 parts by weight of a flocculant, and the flocculant is ferric chloride or fly ash.

By adopting the technical scheme, the fly ash reacts with alkaline substances in the alimentary canal to generate aluminosilicate gel, and the aluminosilicate gel is wrapped on the surface of the powder agglomerate, so that the cohesive force of the surface of the powder agglomerate is increased, the effect of blocking the alimentary canal of pests by the powder agglomerate is improved, and the efficiency of killing lepidoptera pests is improved. When the ferric chloride is used for replacing the fly ash, the ferric chloride reacts with the alkaline substance to generate ferric hydroxide gel, the ferric hydroxide gel can play the same role as aluminosilicate gel, and chloride ions released by the ferric chloride can catalyze the oxidation reaction of the nanometer iron powder, so that the expansion effect of the expanding agent is improved.

Preferably, the expanding powder further comprises 6-10 parts by weight of Congo red.

By adopting the technical scheme, congo red can compete with protein in the chitin structure of the feeding membrane to be combined, so that the combination degree of the protein and the chitin in the feeding membrane is reduced, and the decomposition of the feeding membrane is promoted. In addition, congo red can be decomposed to generate nitrogen under the action of persulfate, so that the air pressure inside the pest digestive tract is increased, the probability of perforation of the pest digestive tract is improved, and the insecticidal efficiency of the composite insecticide is improved.

Preferably, the attractant comprises the following components in parts by weight: 60-100 parts of shortening, 60-100 parts of soybean residue, 180 parts of corn flour 140-one, 60-100 parts of glycerol and 24-32 parts of alcohol.

Through adopting above-mentioned technical scheme, the attractant of this application compares with the attractant of correlation technique, uses shortening, soybean sediment and maize meal complex to be built, can provide sugar, grease and protein simultaneously, helps strengthening the effect of luring to the pest for the pest gets the speed of eating the inflation powder, improves the insecticidal efficiency of compound insecticide. In addition, the alcohol can paralyze nerves of pests, weaken the capability of the pests for distinguishing food and contribute to improving the feeding amount of the pests to the swelling powder. The glycerin can be absorbed by the kaolin in the expansion powder, thereby reducing the possibility of water loss from the expansion powder and improving the water retention effect of the expansion powder.

In a second aspect, the present application provides a method for preparing a composite pesticide, which adopts the following technical scheme.

A preparation method of a composite pesticide comprises the following steps:

(1) the poisoning agent and deionized water were mixed according to a 1: (5-7) preparing a mixed solution according to the weight ratio;

(2) uniformly mixing kaolin and an expanding agent to obtain mixed powder, spraying mixed liquid into the mixed powder for 8-12 times, immediately drying the mixed powder after each spraying, and obtaining the expanded powder after the mixed liquid is exhausted;

(3) and uniformly mixing the expanded powder with an attractant to obtain the compound pesticide.

By adopting the technical scheme, firstly, kaolin is taken as a carrier, a poisoning agent and an expanding agent are added to prepare an expanding powder, and then the expanding powder and an attractant are compounded to obtain the compound pesticide.

In summary, the present application has the following beneficial effects:

1. in the composite pesticide, the expansion powder consists of kaolin, an expanding agent and a poisoning agent, when pests eat the expansion powder, the kaolin in the expansion powder absorbs water to shrink the peritrophic membrane, and the expanding agent in the expansion powder applies expansion stress to the peritrophic membrane to promote the rupture of the peritrophic membrane. After the feeding membrane is broken, the powder block mass blocks the alimentary canal of the pests, thereby improving the efficiency of killing the lepidoptera pests.

2. The Congo red is preferably selected to be one of raw materials of the composite insecticide in the application, and on one hand, the Congo red can promote the decomposition of a feeding film, on the other hand, the Congo red can also generate nitrogen under the action of persulfate, so that the probability of perforation of the digestive tract of pests is improved, and the insecticidal efficiency of the composite insecticide is improved.

3. According to the method, firstly, kaolin is used as a carrier, a poisoning agent and an expanding agent are added to prepare expanded powder, and then the expanded powder and an attractant are compounded to obtain the compound pesticide.

Detailed Description

The present application will be described in further detail with reference to examples.

Examples

The raw materials used in the embodiment of the application can be obtained by market, wherein, ethyl pleocidin is purchased from Zhengzhou Ruichang chemical products Limited company, Bacillus thuringiensis powder is purchased from Guangzhou genuine microorganism technology Limited company (active content 32000 IU/mg), deionized water is purchased from Jinnanxin Yajing Yacheng chemical technology Limited company, kaolin is superfine kaolin (1250 mesh) produced by Jinnanzhengdong chemical industry Limited company, nanometer iron powder is spherical nanometer iron powder (average particle size 30nm) produced by Shanghai Xiaozhang nanometer technology Limited company, calcium bentonite is calcium bentonite (600 mesh) produced by Lingxian Lingxin mineral product processing factory, shortening oil is produced by Guangdong Hengzhun biological technology Limited company, soybean dregs are feed-grade soybean dregs produced by Lingzhou Yongduo feed factories, corn flour is grade 1 corn flour sold by Shanxi agricultural development Limited company, the glycerol is industrial-grade glycerol produced by Jinnan Xin Shuo chemical industry Co., Ltd, the alcohol is absolute ethyl alcohol produced by Jinnan Jun Teng chemical industry Co., Ltd, the quartz powder is 120-mesh quartz powder produced by Nanyang Hengsheng quartz sand filter material Co., Ltd, the persulfate is industrial-grade sodium persulfate produced by Guangzhou Deluo chemical industry Co., Ltd, the fly ash is first-grade fly ash of a processing plant sold by Wangwang mineral products in Lingshan county, the ferric chloride is anhydrous ferric chloride produced by Liangda water purifying agent plants in Lianspan of Huluo island city, and the Congo red is Congo red produced by Wuhan kang biological medicine science and technology Co., Ltd.

Examples 1 to 5

The following description will be given by taking example 1 as an example.

Example 1

The composite insecticide of example 1 was prepared according to the following procedure:

(1) 80kg of a poisoning agent and 450kg of deionized water are prepared into a mixed solution, wherein the poisoning agent is prepared from spinetoram and bacillus thuringiensis powder according to the weight ratio of 1:2 by weight ratio;

(2) uniformly mixing 150kg of kaolin and 60kg of expanding agent to obtain mixed powder, spraying mixed liquid into the mixed powder by 10 times, immediately drying the mixed powder after each spraying, and obtaining the expanded powder after the mixed liquid is exhausted; wherein, the expanding agent is formed by mixing nano iron powder and calcium bentonite according to the weight ratio of 1: 2.2;

(3) uniformly mixing 60kg of shortening, 60kg of soybean dregs, 140kg of corn flour, 60kg of glycerol and 24kg of alcohol, drying and crushing the mixture to obtain the attractant, mixing the expanded powder and the attractant according to the weight ratio of 1:1, and mixing uniformly to obtain the compound pesticide.

As shown in Table 1, examples 1 to 5 differ mainly in the raw material ratio of the expanding powder.

TABLE 1

Sample(s)	Poisoning agent/kg	Kaolin/kg	Expanding agent/kg
				Example 1	80	150	60
Example 2	90	175	65
				Example 3	100	200	70
Example 4	110	225	75
				Example 5	120	250	80

As shown in table 2, example 3 differs from examples 6 to 9 mainly in that the expanding powder and the attractant are mixed in different weight ratios.

TABLE 2

As shown in Table 3, example 7 differs from examples 10-13 mainly in the weight ratio of spinetoram to Bacillus thuringiensis powder in the biocide.

TABLE 3

Example 14

This example is different from example 11 in that 16kg of quartz powder was further included in the expanded powder, and the quartz powder was mixed with the dried mixed powder in step (2) to obtain an expanded powder.

As shown in Table 4, examples 14 to 18 differ mainly in the amount of the quartz powder used.

TABLE 4

Sample(s)	Example 14	Example 15	Example 16	Example 17	Example 18
						Quartz powder/kg	16	17	18	19	20

Example 19

This example differs from example 16 in that 16kg of sodium persulfate was also included in the expanded powder, and the sodium persulfate was mixed with the dried mixed powder in step (2) to obtain an expanded powder.

As shown in Table 5, examples 19 to 23 differ mainly in the amount of sodium persulfate used.

TABLE 5

Sample(s)	Example 19	Example 20	Example 21	Example 22	Example 23
						Sodium persulfate/kg	16	18	20	22	24

As shown in table 6, example 21 is different from examples 24 to 27 mainly in the weight ratio of nano iron powder to calcium bentonite in the swelling agent.

TABLE 6

Example 28

The difference between this example and example 25 is that 20kg of flocculant is also included in the expanded powder, the expanded powder is obtained by mixing the flocculant with the dried mixed powder in step (2), and the flocculant is fly ash.

As shown in Table 7, examples 28-32 differ primarily in the amount of fly ash used.

TABLE 7

Sample(s)	Example 28	Example 29	Example 30	Example 31	Example 32
						Fly ash/kg	20	25	30	35	40

Example 33

This example differs from example 30 in that ferric chloride was used as the flocculant.

Example 34

This example differs from example 33 in that 6kg of congo red was also included in the expanded powder, and the flocculated congo red was mixed with the dried mixed powder in step (2) to give an expanded powder.

As shown in Table 8, examples 34-38 differ primarily in the amount of Congo Red used.

TABLE 8

Sample(s)	Example 34	Example 35	Example 36	Example 37	Example 38
						Congo red/kg	6	7	8	9	10

Table 9 example 36 differs from examples 39-42 mainly in the proportion of the attractant.

TABLE 9

Sample(s)	Shortening/kg	Soybean dregs/kg	Corn flour/kg	Glycerol/kg	Alcohol/kg
						Example 36	60	60	140	60	24
Example 39	70	70	150	70	26
						Example 40	80	80	160	80	28
EXAMPLE 41	90	90	170	90	30
						Example 42	100	100	180	100	32

Comparative example

Comparative example 1

A composite pesticide is prepared by the following steps: (1) preparing 60kg of dinotefuran and 100kg of deionized water into a mixed solution; (2) spraying the mixed solution into 150kg of flour for 10 times, immediately drying after spraying, and obtaining powder after the mixed solution is completely exhausted; (3) and (3) uniformly mixing the shortening and the powder according to the weight ratio of 1:1.2, and then drying and crushing the mixture to obtain the composite pesticide.

Comparative example 2

This comparative example differs from example 3 in that no swelling agent is included.

Performance detection test method

The method for testing the insecticidal efficiency of the compound insecticide by using the hyphantria cunea larva test captured in the forest area of diseases and insect pests in Zhengdingcounty, Hebei province as a test object comprises the following steps:

(1) uniformly mixing 5kg of sandy loam and 2kg of humus, irradiating for 3h by using an ultraviolet lamp with the illumination intensity of 20mW/cm2 to obtain a soil matrix, and filling the soil matrix into a transparent observation box;

(2) broadcasting 200g of composite pesticide on the surface of the soil matrix in the transparent observation box;

(3) 5 fall webworm larvae of 25. + -.1 mm length were selected and grouped together, and the larvae were placed in a transparent observation box and the time taken for each larva to die from the start of feeding to completion.

After the test, the time taken from the beginning of feeding to the complete death of each group of larvae was averaged and recorded as the average effective time, and the test results of the average effective time are shown in table 10.

Watch 10

As can be seen by combining examples 1-5 with comparative example 1 and by combining Table 10, the average effect times measured for examples 1-5 are all shorter than for comparative example 1, indicating that the formulations prepared according to the present application are faster acting. In examples 1-5, the average effective time of example 3 was the shortest, indicating that the insecticidal efficiency of example 3 was the highest.

As can be seen by combining example 3 and comparative example 2 with table 10, the average effective time measured in example 3 is shorter than that in comparative example 2, indicating that the addition of the swelling agent contributes to the improvement of the pesticidal efficiency of the composite pesticide.

Combining example 3 with examples 6-9 and table 10, it can be seen that when the expanded powder and attractant are in accordance with (1.2-1.6): 1, the composite pesticide has higher insecticidal efficiency.

In combination with examples 7, 10-13 and Table 10, it can be seen that when spinetoram and Bacillus thuringiensis powders were mixed as described in 1: (2.2-2.6) the pesticidal efficiency of the composite pesticide is high when they are mixed in the weight ratio.

As can be seen by combining example 11, examples 14 to 18 and Table 10, the average effective time measured in examples 14 to 18 was longer than that in example 11, indicating that the quartz powder contributes to the improvement of the pesticidal efficiency of the composite pesticide.

As can be seen by combining example 16, examples 19-23 and Table 10, the average effect times measured for examples 19-23 were all longer than those measured for example 11, indicating that sodium persulfate helps to increase the insecticidal efficiency of the composite insecticide.

It can be seen from the combination of examples 21, 24 to 27 and Table 10 that the composite pesticide has high pesticidal efficiency when nano iron powder and calcium bentonite are mixed in a weight ratio of 1 (2.4-2.8).

As can be seen by combining example 25, examples 28-32 and Table 10, the average effective time measured in examples 28-32 is longer than that measured in example 11, indicating that the fly ash is helpful in improving the insecticidal efficiency of the composite insecticide.

As can be seen by combining example 33 with example 30 and by combining with Table 10, the average effective time measured in example 33 is longer than that measured in example 30, which shows that ferric chloride is more helpful to improve the insecticidal efficiency of the composite insecticide compared with fly ash.

As can be seen by combining example 33, examples 34 to 38 and Table 10, the average effective time measured in examples 34 to 38 is longer than that in example 33, indicating that Congo red contributes to the improvement of the insecticidal efficiency of the composite insecticide.

As can be seen by combining example 36, examples 39-42 and Table 10, the insecticidal efficiency of the composite insecticide was higher when the attractants were formulated according to the formulation systems of examples 39-41.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. A composite insecticide, characterized in that the composite insecticide comprises an expanding powder and an attractant according to the ratio of (1.2-1.6): 1, and the expansion powder comprises the following components in parts by weight: 150-250 parts of kaolin, 60-80 parts of expanding agent and 80-120 parts of poisoning agent.

2. The composite pesticide of claim 1, wherein the expansion powder comprises the following components in parts by weight: 175-225 parts of kaolin, 65-75 parts of expanding agent and 90-110 parts of poisoning agent.

3. The composite insecticide according to claim 1, wherein said insecticide is prepared from spinetoram and bacillus thuringiensis powder in a ratio of 1: (2.2-2.6) by weight ratio.

4. The composite pesticide of claim 1, wherein the expanding powder further comprises 16-20 parts by weight of quartz powder.

5. The composite insecticide according to claim 1, wherein said expanding powder further comprises 16 to 24 parts by weight of persulfate.

6. The composite pesticide of claim 5, wherein the swelling agent is prepared by mixing nano iron powder and calcium bentonite according to a weight ratio of 1 (2.4-2.8).

7. The composite pesticide of claim 6, wherein the expanded powder further comprises 20-40 parts by weight of a flocculant, and the flocculant is selected from ferric chloride or fly ash.

8. The composite pesticide of claim 5, wherein the expansion powder further comprises 6-10 parts by weight of Congo red.

9. The composite pesticide of claim 1, wherein the attractant comprises the following components in parts by weight: 60-100 parts of shortening, 60-100 parts of soybean residue, 180 parts of corn flour 140-one, 60-100 parts of glycerol and 24-32 parts of alcohol.

10. The method for preparing a composite pesticide according to any one of claims 1 to 9, characterized by comprising the steps of: