Pesticide preparation for preventing and treating aphids on apple trees

Abstract

The invention relates to a pesticide preparation for preventing and treating aphids on apple trees, which is prepared from neonicotinoid insecticides, pyrethroid insecticides, cosolvents, synergists, nano silicon dioxide dispersing agents, organic silicon surfactants, sodium lignin sulfonate, penetrating agents JFC, xanthan gum and deionized water. A nano silicon dioxide dispersing agent is sprayed on apple leaves to construct a micro-rough surface, the contact area of the liquid medicine and the apple leaves is increased, the sprayed liquid medicine is prevented from rapidly sliding off from the apple leaves, the adhesion of the liquid medicine to the apple leaves is enhanced, meanwhile, an organic silicon surfactant can reduce the surface tension value of the liquid medicine, and the effect of preventing the liquid medicine from falling off is achieved. The problem that the aphid control effect is affected due to the poor attachment effect after the traditional pesticide is sprayed is avoided as far as possible.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide preparations, and particularly relates to a pesticide preparation for preventing and controlling aphids in apple trees. Background Art

[0002] Aphids are a collective term for all members of the superfamily Aphidoidea in the order Hemiptera. Currently, there are approximately 4,400 species of aphids in 10 families, most of which belong to the family Aphididae. Aphids are usually divided into three parts: head, thorax, and abdomen. Their bodies are smooth or covered with wax powder or wax threads. Their hairs are pointed or blunt-tipped, sometimes swollen into a head or fan-shaped shape. Their abdominal tubes are absent, annular, or tubular. Their tails are often semicircular, tuberculate, conical, triangular, or pentagonal, of varying lengths.

[0003] Existing aphid pesticide formulations generally use imidacloprid emulsifiable concentrate as the main control ingredient and lakai powder as a surfactant. Due to the presence of a waxy layer on the surface of apple leaves, the HLB value of lakai powder has a low match with the characteristics of the apple leaf surface, resulting in poor adhesion of traditional aphid pesticide formulations after spraying. Some formulations also use lignin sulfonate for synergy, but the problem of penetration into hydrophobic leaves is not solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a pesticide formulation for controlling apple tree aphids with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A pesticide preparation for controlling apple tree aphids comprises a neonicotinoid insecticide, a pyrethroid insecticide, a cosolvent, a synergist, a nano-silica dispersant, an organosilicon surfactant, sodium lignin sulfonate, a penetrant JFC, xanthan gum and deionized water, wherein the mass percentages of the components are as follows: 0.5%-15% of the neonicotinoid insecticide, 0.1%-10% of the pyrethroid insecticide, 5%-10% of the cosolvent, 0.1%-5% of the synergist, 3-5% of the nano-silica dispersant, 2-4% of the organosilicon surfactant, 1-2% of the sodium lignin sulfonate, 0.5-1% of the penetrant JFC, 0.1-0.3% of the xanthan gum, and the balance is deionized water.

[0007] As a further optimization scheme of the present invention, the neonicotinoid insecticide is selected from one of imidacloprid, thiamethoxam, acetamiprid, and dinotefuran, and the pyrethroid insecticide is selected from one of cypermethrin, deltamethrin, cyfluthrin, and high-efficiency chlorflucythrinate.

[0008] As a further optimized solution of the present invention, the cosolvent is formed by mixing emulsifiable concentrate, suspending agent, water-dispersible granules and microemulsion in the same proportion.

[0009] As a further optimized solution of the present invention, the synergist is a natural plant extract and a microbial metabolite, and is selected from at least one of azadirachtin, rotenone, and Bacillus subtilis fermentation broth.

[0010] As a further optimization solution of the present invention, the particle size of the nano-silicon dioxide dispersant is 50-100 nm, and the specific surface area is ≥380 m 2 / g, and the surface was modified with γ-aminopropyltriethoxysilane.

[0011] As a further optimization solution of the present invention, the organosilicon surfactant is polyether-modified polydimethylsiloxane, and the HLB value of the polyether-modified polydimethylsiloxane is 11-13.

[0012] As a further optimized solution of the present invention, the pesticide formulation for controlling apple tree aphids further comprises 0.5%-5% of an antifreeze agent, wherein the antifreeze agent is one of glycerol, ethylene glycol or urea.

[0013] The beneficial effects of the present invention are: nano-silicon dioxide dispersant is sprayed on apple leaves to construct a micro-rough surface, which increases the contact area between the medicine liquid and the apple leaves, prevents the medicine liquid from sliding quickly off the apple leaves after spraying, and enhances the adhesion of the medicine liquid to the apple leaves. At the same time, the silicone surfactant can reduce the surface tension value of the medicine liquid, further improve the adhesion effect of the medicine liquid, and try to avoid the problem of poor adhesion effect after spraying traditional agents, which affects the aphid control effect. DETAILED DESCRIPTION

[0014] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] Example 1

[0016] Two experimental groups: 3g of nano-silica dispersant was ultrasonically dispersed in 15ml of deionized water, and 5g of neonicotinoid insecticide, 1g of pyrethroid insecticide, 5g of cosolvent, 1g of synergist, and 2g of sodium lignin sulfonate were added. After stirring at 60℃ for 45 minutes, 4g of silicone surfactant and 1g of penetrant JFC were added in sequence. After adjusting the pH to 6.0, 1g of xanthan gum was added and high-pressure homogenization was performed to obtain a viscous liquid preparation. The preparation was then diluted 800-1000 times and sprayed on the liquid surface using the secondary dilution method during the growth period of new shoots of apple trees. The nozzle pressure was controlled at 0.3-0.5Mpa. After spraying, the surface tension and contact angle of the preparation adhered to the apple leaves were tested. One hour after spraying, clean water was artificially sprayed to simulate the natural rainfall process, and the retention of the preparation on the surface of the apple leaves and the control effect were regularly tested.

[0017] Two control groups: the traditional aphid pesticide preparations on the market were diluted by the same multiple and then sprayed on the liquid surface using the secondary dilution method during the growth period of the new shoots of apple trees. The nozzle pressure was controlled at 0.3-0.5Mpa. After spraying, the surface tension of the preparations adhered to the apple leaves was tested and the contact angle was measured. One hour after spraying, clean water was manually sprayed to simulate the natural rainfall process, and the retention of the preparations on the surface of the apple leaves and the control effect were regularly tested.

[0018] Example 2

[0019] Two experimental groups: 5g of nano-silica dispersant was ultrasonically dispersed in 15ml of deionized water, and 5g of neonicotinoid insecticide, 1g of pyrethroid insecticide, 5g of cosolvent, 1g of synergist, and 2g of sodium lignin sulfonate were added. After stirring at 60℃ for 45 minutes, 6g of silicone surfactant and 1g of penetrant JFC were added in sequence. After adjusting the pH to 6.0, 1g of xanthan gum was added and high-pressure homogenization was performed to obtain a viscous liquid preparation. The preparation was then diluted 800-1000 times and sprayed on the liquid surface using the secondary dilution method during the growth period of new shoots of apple trees. The nozzle pressure was controlled at 0.3-0.5Mpa. After spraying, the surface tension and contact angle of the preparation adhered to the apple leaves were tested. One hour after spraying, clean water was artificially sprayed to simulate the natural rainfall process, and the retention of the preparation on the surface of the apple leaves and the control effect were regularly tested.

[0020] Two control groups: the traditional aphid pesticide preparations on the market were diluted by the same multiple and then sprayed on the liquid surface using the secondary dilution method during the growth period of the new shoots of apple trees. The nozzle pressure was controlled at 0.3-0.5Mpa. After spraying, the surface tension of the preparations adhered to the apple leaves were tested and the contact angle was tested. One hour after spraying, clean water was sprayed manually to simulate the natural rainfall process, and the retention of the preparations on the surface of the apple leaves and the control effect were regularly tested.

[0021] Test method:

[0022] 1. Contact angle measurement: using DSA25 contact angle meter;

[0023] 2. Adhesion rate test: refer to NY / T1460.1-2007 standard;

[0024] 3. Evaluation of lasting effect: According to GB / T17980.13-2008 field efficacy test guidelines;

[0025] The experimental data are shown in Table 1 below:

[0026]

[0027]

[0028] Table 1

[0029] It can be concluded from the experimental data in Table 1 that the pesticide formulation for controlling apple aphids by adding nano-silica dispersant, silicone surfactant and xanthan gum is compared with the traditional pesticide reagent on the market which uses imidacloprid emulsifiable concentrate as the main control ingredient and cyclopentane as a surfactant. After spraying at the same concentration, the surface tension and contact angle of the solution are significantly reduced, and the 48-hour solution adhesion rate, lasting period and prevention effect are significantly improved. Moreover, the surface tension, contact angle, 48-hour solution adhesion rate, lasting period and prevention effect after spraying are all proportional to the concentration of nano-silica dispersant and silicone surfactant.

[0030] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A pesticide formulation for controlling apple aphids, characterized by: The invention comprises neonicotinoid insecticide, pyrethroid insecticide, cosolvent, synergist, nano-silica dispersant, silicone surfactant, sodium lignin sulfonate, penetrant JFC, xanthan gum and deionized water, wherein the mass percentage of each component is as follows: neonicotinoid insecticide 0.5%-15%, pyrethroid insecticide 0.1%-10%, cosolvent 5%-10%, synergist 0.1%-5%, nano-silica dispersant 3-5%, silicone surfactant 2-4%, sodium lignin sulfonate 1-2%, penetrant JFC-0.5-1%, xanthan gum 0.1-0.3%, and the balance is deionized water.

2. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The neonicotinoid insecticide is selected from one of imidacloprid, thiamethoxam, acetamiprid, and dinotefuran, and the pyrethroid insecticide is selected from one of cypermethrin, deltamethrin, cyfluthrin, and lambda-cyhalothrin.

3. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The cosolvent is formed by mixing emulsifiable concentrate, suspending agent, water-dispersible granules and microemulsion in the same proportion.

4. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The synergist is a natural plant extract and a microbial metabolite, and is selected from at least one of azadirachtin, rotenone, and Bacillus subtilis fermentation broth.

5. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The particle size of the nano-silicon dioxide dispersant is 50-100nm, and the specific surface area is ≥380m 2 / g, and the surface was modified with γ-aminopropyltriethoxysilane.

6. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The organosilicon surfactant is polyether-modified polydimethylsiloxane, and the HLB value of the polyether-modified polydimethylsiloxane is 11-13.

7. The pesticide formulation for controlling apple aphids according to claim 1, characterized in that: The pesticide formulation for controlling apple tree aphids further comprises 0.5%-5% of an antifreeze agent, which is one of glycerol, ethylene glycol or urea.

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