Suspending agent containing spinetoram and emamectin benzoate and application thereof

Abstract

The invention belongs to the technical field of insecticides, and particularly relates to a suspending agent containing spinetoram and emamectin benzoate and application of the suspending agent. The suspending agent comprises the following components in percentage by weight: 1-4% of spinetoram, 6-10% of emamectin benzoate, 2-6% of a synergist, 5-10% of a wetting dispersant, 0.1-1% of a thickening agent, 0.1-1% of a suspending aid, 0.1-1% of a defoaming agent, 1-5% of an anti-freezing agent, 0.05-0.3% of a preservative and the balance of deionized water. The synergist is prepared from silwet 618 and GY-Tmax (Glutathione Y-Tmax); the suspending agent prepared by the invention has excellent preparation performance, and the synergist GY-Tmax and silwet 618 or the combination of GY-Tmax and silwet 618 is added into the suspending agent, so that the field control effect of the suspending agent on crop pests can be remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of insecticides, and specifically relates to a suspension containing spinetoram and emamectin benzoate and application thereof. Background Art

[0002] Spinetoram is a new spinosyn insecticide produced by Dow Agrochemicals. Among the spinosyn insecticides, spinetoram is a new and unique active ingredient and a highly effective, broad-spectrum insecticide. It is mainly used to control lepidoptera and thysanoptera larvae, and has a good control effect on vegetable pests such as diamondback moth, beet armyworm, leaf miner, thrips, armyworm, and bean pod borer. It is widely used in the rotation of drug varieties for resistance management of vegetable pests.

[0003] Emamectin benzoate is the full name of emamectin benzoate. Compared with avermectin, its insecticidal activity is improved by 3 orders of magnitude. It has extremely high activity against lepidopteran larvae and many other pests. It has both stomach poisoning and contact killing effects. It has a very good effect at very low doses. In the process of pest control, it does not harm beneficial insects, which is conducive to the comprehensive control of pests. Emamectin benzoate has high biological activity against many pests, especially against Lepidoptera and Diptera, such as cotton bollworm, tobacco hornworm, diamondback armyworm, beet armyworm, dryland armyworm, leaf armyworm, cabbage silver moth, cabbage butterfly, cabbage heart borer, cabbage striped borer, tomato hornworm, potato beetle, etc.

[0004] Patent document CN102396474B discloses an insecticide composition containing spinetoram and a biogenic insecticide, wherein the biogenic insecticide is avermectin, avermectin benzoate or ivermectin; the weight ratio of spinetoram to the biogenic insecticide is 1:60-60:1; the composition can be used to control rice stem borers, vegetable diamondback moths, beet armyworms, and cotton bollworms. The composition not only expands the application scope of the insecticide, but also reduces the amount of the agent used while significantly increasing the efficacy and ensuring the optimal control effect, and reduces the amount used per mu, thereby reducing costs and reducing environmental hazards.

[0005] CN102578115A discloses a spinetoram-emamectin benzoate compound suspension, wherein the raw materials thereof comprise the following components in weight percentage: spinetoram 0.1-20%, emamectin benzoate 0.1-35%, dispersant 0.5-4%, wetting agent 0.5-5%, thickener 0.1-4.5%, antifreeze 0.5-5%, preservative 0.1-0.6%, defoamer 0.1-0.8% and water 42.0-83.0%. The prepared compound suspension has a broad pest control spectrum, and pests are unlikely to develop drug resistance. The preparation process is relatively simple and the production cost is relatively low. No large amount of organic solvent is required, which reduces the cost and reduces the irritation of the organic solvent to operators and the pollution to the environment.

[0006] The prior art discloses that a combination of spinetoram and emamectin benzoate has a significant synergistic effect, and also discloses a suspension preparation containing spinetoram and emamectin benzoate; however, the prior art does not have any relevant research on a synergist for a combination of spinetoram and emamectin benzoate, and in actual use, there is still room for improvement in the field control effect of the agent on crop pests. Summary of the invention

[0007] The present invention provides a suspension containing spinetoram and emamectin benzoate and application thereof. The technical solution of the present invention is:

[0008] A suspension containing spinetoram and emamectin benzoate comprises the following components in percentage by weight: 1-4% spinetoram, 6-10% emamectin benzoate, 2-6% synergist, 5-10% wetting dispersant, 0.1-1% thickener, 0.1-1% suspending agent, 0.1-1% defoamer, 1-5% antifreeze, 0.05-0.3% preservative, and deionized water to make up to 100%.

[0009] The synergist described in the present invention is composed of silwet 618 and GY-Tmax. Preferably, the mass ratio of silwet 618 to GY-Tmax is 1:1-1:7.

[0010] The suspension concentrate of the present invention comprises the following components in percentage by weight: 2% of spinetoram, 8% of emamectin benzoate, 4% of synergist, 5-10% of wetting and dispersing agent, 0.1-1% of thickener, 0.1-1% of suspending agent, 0.1-1% of defoaming agent, 1-5% of antifreeze agent, 0.05-0.3% of preservative, and deionized water to make up to 100%.

[0011] The suspension concentrate of the present invention comprises the following components in percentage by weight: 2% of spinetoram, 8% of emamectin benzoate, 4% of synergist, 2% of calcium lignin sulfonate, 5% of Tersperse 2700, 0.15% of xanthan gum, 0.3% of magnesium aluminum silicate, 0.3% of organic bentonite, 3% of glycerol, 0.1% of sodium benzoate, 0.25% of SAG1572, and deionized water to make up 100%; the mass ratio of the synergist Silwet 618 to GY-Tmax is 1:1-1:7.

[0012] The suspension concentrate of the present invention is used for preventing and controlling the diamondback moth, beet armyworm, cotton bollworm, leaf miner, thrips, armyworm, bean pod borer and fall armyworm.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects:

[0014] The 10% spinetoram·emamectin benzoate suspension prepared by the invention has excellent suspension rate performance, and the prepared suspension is qualified;

[0015] Adding the synergist GY-Tmax, silwet 618 or the combination of GY-Tmax and silwet 618 to the 10% spinetoram·emamectin benzoate suspension can significantly improve the field control effect of the suspension on crop pests, especially when the mass ratio of silwet 618 to GY-Tmax is 1:1-1:7, the control effect is particularly significant. DETAILED DESCRIPTION

[0016] The specific implementation manner of the present invention is further explained below in conjunction with specific embodiments.

[0017] Example 1: Preparation of 10% spinetoram-emamectin benzoate suspension

[0018] Test Materials:

[0019] Technical materials: spinetoram, emamectin benzoate; wetting and dispersing agents: calcium lignin sulfonate, Tersperse2700; synergists: silwet 618, GY-Tmax; thickeners: magnesium aluminum silicate, xanthan gum; suspending agents: organic bentonite; antifreeze: glycerol; preservatives: sodium benzoate; defoaming agent: SAG1572; solvent: deionized water;

[0020] Instruments: electronic balance, dispersion sand mill, pH meter, high performance liquid chromatograph, laser particle size distribution analyzer, water bath, etc.

[0021] Preparation method: according to the formula composition, first add part of deionized water, antifreeze, preservative, wetting dispersant and part of defoamer, use laboratory dispersion sand mill to shear for 5-10 minutes, then add thickener, spinetoram and emamectin benzoate, continue shearing for 10-15 minutes, transfer to dispersion sand mill for sand milling, sand milling time is 1.0-1.5h, particle size is controlled D90≤5μm, zirconium beads are filtered after sand milling, then add the remaining defoamer and the remaining deionized water, shear and mix evenly, and carry out detection and analysis of various technical indicators;

[0022] Detection method: The mass fraction of active ingredients was determined by HPLC; pH value, suspension rate, pourability, persistent foaming, wet sieving test, low temperature stability and heat storage stability test were all determined according to national standards.

[0023] Suspension formulation screening:

[0024] Table 1: Suspension formulation

[0025]

[0026]

[0027] Results and Analysis:

[0028] The 10% spinetoram·emamectin benzoate suspension prepared by the invention has excellent suspension rate performance, and the prepared suspension is qualified.

[0029] Table 2: 10% Spinetoram·Emamectin Benzoate Suspension

[0030]

[0031] Example 2: Field control effect of 10% spinetoram·emamectin benzoate on Plutella xylostella

[0032] Test crops: Cabbage, which grew basically the same and well in the test area;

[0033] Test pest: Diamondback moth

[0034] Test agent: Example 1 Formulation 1-7

[0035] Experimental design: Set up treatment groups and blank control groups, with 4 replicates for each treatment, arranged in random blocks, and set up protection rows around each plot.

[0036] Test method: When applying the pesticide, the diamondback moth in the field is in the peak egg hatching stage to the third instar larvae stage. Use a backpack sprayer to spray evenly according to the designed dosage, with a spray volume of 30L / 667m2.

[0037] Survey method: According to the relevant content of "GB / T17980.13-2000 Pesticide Field Efficacy Test Guidelines (I) Insecticide Control of Lepidoptera Larvae on Cruciferous Vegetables", the number of live larvae on 10 cabbages in each plot was investigated. During the trial period, the survey was conducted twice: the base number of insects was investigated before the application of pesticides, and the number of residual live insects was investigated 7 days after the application of pesticides, and the control effect was calculated.

[0038] Control effect (%) = [1-(number of live insects in the control area before drug administration × number of live insects in the treatment area after drug administration) / (number of live insects in the control area after drug administration × number of live insects in the treatment area before drug administration)] × 100.

[0039] Test results

[0040] As shown in Table 3, compared with Formulation 8, adding the synergist GY-Tmax or the combination of GY-Tmax and Silwet 618 to the 10% spinetoram·emamectin benzoate suspension can significantly improve the field control effect of the suspension against Plutella xylostella, especially when the mass ratio of Silwet 618 to GY-Tmax is 1:1-1:7.

[0041] Table 3: Field control effect of 10% spinetoram·emamectin benzoate on Plutella xylostella

[0042]

[0043] Example 3: Field control effect of 10% spinetoram·emamectin benzoate on fall armyworm in corn

[0044] Test crops: corn, which grew basically the same and well in the test area, and the test fertilizer and water management and tillage were the same as usual;

[0045] Test pest: Fall armyworm

[0046] Test agent: Example 1 Formulation 1-7

[0047] Experimental design: Set up treatment groups and blank control groups, with 4 replicates for each treatment, arranged in random blocks, and set up protection rows around each plot.

[0048] Test method: During the test, the growth period of corn was from seedling stage to jointing stage. A backpack sprayer was used to spray evenly according to the designed dosage, and the spray volume was 45L / 667m2.

[0049] Survey method: Investigate the insect population before applying the pesticide, investigate the number of remaining live insects 14 days after applying the pesticide, and calculate the control effect. Use the 5-point sampling method, investigate 10 plants at each point, and count the number of live insects in each plot. The insect population of each plot is 400-500 insects per plant, which is a medium occurrence. At the same time, observe the effects of different pesticide treatments on corn growth to determine whether pesticide damage and symptoms occur.

[0050] As shown in Table 4, compared with Formula 8, the addition of synergist GY-Tmax, silwet 618 or the combination of GY-Tmax and silwet 618 to the 10% spinetoram·emamectin benzoate suspension can significantly improve the field control effect of the suspension against corn fall armyworm, especially when the mass ratio of silwet 618 to GY-Tmax is 1:1-1:7. The control effect is particularly significant. Field observation is safe for crops.

[0051] Table 4: Field control effect of 10% spinetoram·emamectin benzoate on fall armyworm

[0052]

[0053]

[0054] Finally, it should be noted that the above examples are only some specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art are considered to be within the scope of protection of the present invention.

Claims

1. A suspension concentrate comprising spinetoram and emamectin benzoate, characterized in that: The invention comprises the following ingredients in percentage by weight: 1-4% of spinetoram, 6-10% of emamectin benzoate, 2-6% of synergist, 5-10% of wetting and dispersing agent, 0.1-1% of thickener, 0.1-1% of suspending agent, 0.1-1% of defoamer, 1-5% of antifreeze agent, 0.05-0.3% of preservative and 100% of deionized water; the synergist is composed of silwet 618 and GY-Tmax.

2. The suspending agent according to claim 1, characterized in that The mass ratio of silwet 618 and GY-Tmax is 1:1-1:

7.

3. The suspending agent according to claim 1 or 2, characterized in that Ethyl spinetoram 2%, emamectin benzoate 8%, synergist 4%, wetting and dispersing agent 5-10%, thickener 0.1-1%, suspending agent 0.1-1%, defoaming agent 0.1-1%, antifreeze 1-5%, preservative 0.05-0.3%, deionized water to make up 100%.

4. The suspending agent according to claim 1, characterized in that 2% spinetoram, 8% emamectin benzoate, 4% synergist, 2% calcium lignin sulfonate, 5% Tersperse 2700, 0.15% xanthan gum, 0.3% magnesium aluminum silicate, 0.3% organic bentonite, 3% glycerol, 0.1% sodium benzoate, 0.25% SAG1572, and deionized water to make up 100%; the mass ratio of the synergist Silwet 618 and GY-Tmax is 1:1-1:

7.

5. Use of the suspension concentrate according to any one of claims 1 to 4 for controlling crops such as diamondback moth, beet armyworm, cotton bollworm, leaf miner, thrips, armyworm, bean pod borer and fall armyworm.

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