An insecticidal composition containing bicyclopyrone and flucycloxuron

Abstract

The present invention discloses an insecticidal composition containing alfuracarb and flucycloxuron, which comprises an active ingredient alfuracarb, an active ingredient flucycloxuron, a compound synergist, an auxiliary agent and a filler. Among them, the mass content of alfuracarb is 2% - 50%, the mass content of flucycloxuron is 2% - 50%, and the mass content of the compound synergist is 3% - 35%. The compound synergist in the insecticidal composition of the present invention can significantly improve the comprehensive control effect of the alfuracarb and flucycloxuron composition on the eggs, nymphs and adults of vegetable whiteflies, so that the insecticidal composition of the present invention shows excellent control efficacy against vegetable whiteflies.

Description

Technical Field

[0001] The present application relates to the technical field of insecticides, and particularly relates to an insecticidal composition containing bicyclopyrone and novaluron. Background Art

[0002] Bemisia tabaci belongs to the order Homoptera, the family Aleyrodidae, and the genus Bemisia. It was discovered by Gennadius on tobacco in Greece and named Bemisia tabaci. Bemisia tabaci is an important pest on vegetables in China. Bemisia tabaci likes to cluster on the back of young leaves of plants to suck sap, and as new leaves grow, it continuously transfers to the upper new leaves. Bemisia tabaci secretes a large amount of honeydew, which affects the photosynthesis of plants and the quality of vegetables. Bemisia tabaci lays a large number of eggs, generally on the back of vegetable leaves, and rarely on the front. Bemisia tabaci reproduces more than 10 generations a year, with serious generation overlap and rapid population growth. Its adults are good at flying, which brings many difficulties to the prevention and control work. In the prevention and control of Bemisia tabaci, the large use of chemical agents has made Bemisia tabaci highly resistant to many chemical agents such as pyrethroids, carbamates, and nicotine. At present, the chemical agents for preventing and controlling Bemisia tabaci have the problem of single control insect stage, and eggs, nymphs and adults cannot be taken into account, resulting in poor persistence of chemical control and unsatisfactory control effect.

[0003] Bicyclopyrone is a new type of insecticide developed by BASF for controlling piercing-sucking mouthpart pests. Its mode of action is unique and it can effectively control piercing-sucking mouthpart pests such as aphids, whiteflies and some psyllids. The action mechanism of bicyclopyrone is different from that of conventional insecticides. By interfering with the regulation of the vanilloid transient receptor potential channel complex in target insects, it causes insects to lose their senses of gravity, balance, sound, position and movement, lose coordination and sense of direction, and then cannot feed, ultimately leading to the death of insects from starvation. Although bicyclopyrone can stop insects from feeding after application, its knockdown effect is slow. Bicyclopyrone is effective against both adults and larvae.

[0004] Novaluron, also known as diflubenzuron, is a new type of fluorine-containing insect growth regulator that can inhibit the chitin synthesis of target pests and cause their death. It is known as the third generation of insecticides or a new type of insect control agent. It mainly has a stomach toxicity effect on pests, a very small contact toxicity effect, and also has an ovicidal effect. It has high selectivity. Humans, livestock and poultry do not have chitin, so it has very low toxicity to humans and livestock, little killing effect on natural enemies and aquatic animals such as fish and shrimp, and is safe for bees. It has a wide insecticidal spectrum and can control many agricultural pests of Lepidoptera, Coleoptera and Homoptera.

[0005] Bicyclopyrone is effective against adults and larvae, and novaluron is effective against larvae and eggs. The combined use of the two can take into account the control of eggs, larvae and adults. However, due to the unique action mechanisms of bicyclopyrone and novaluron, the control effect is slow and the control effect is average, and there is a need for further improvement. Summary of the Invention

[0006] In order to improve the above technical problems, the present application provides an insecticidal composition containing bicycloprofen and flucycloxuron.

[0007] The specific technical solution is as follows:

[0008] 1. An insecticidal composition containing bicycloprofen and flucycloxuron provided by the present invention includes active ingredients bicycloprofen, active ingredient flucycloxuron, a compound synergist, an auxiliary agent and a filler. Among them, the mass content of bicycloprofen is 2% - 50%, the mass content of flucycloxuron is 2% - 50%, and the mass content of the compound synergist is 3% - 35%.

[0009] The compound synergist includes orange peel essential oil and isomeric tridecyl alcohol ether carboxylate, and the mass ratio is: orange peel essential oil: isomeric tridecyl alcohol ether carboxylate = 1:1 - 2:3.

[0010] The preparation forms of the insecticidal composition can be suspension concentrate, emulsion in water, microemulsion, wettable powder, water dispersible granule, dispersible oil suspension concentrate, etc., and suspension concentrate is preferred.

[0011] When the preparation form of the insecticidal composition is suspension concentrate, the total mass content of the active ingredients bicycloprofen and flucycloxuron is 4% - 30%, and the mass content of the compound synergist is 3% - 20%.

[0012] When the preparation form of the insecticidal composition is suspension concentrate, the auxiliary agents include a dispersant, a wetting agent, an antifoaming agent, an antifreezing agent, a thickening agent, and a preservative.

[0013] The preparation method of the suspension concentrate provided by the present invention: Mix deionized water, a dispersant, and a wetting agent evenly, then add an antifoaming agent, an antifreezing agent, and a preservative under stirring, mix evenly by high-speed shearing, then add the technical material of bicycloprofen, the technical material of flucycloxuron and the compound synergist, continue to shear and mix evenly, then enter a horizontal sand mill for primary sanding and secondary sanding, so that the particle size of the material is all below 5 μm, and then add a thickening agent and shear evenly to obtain the suspension concentrate product of the present invention.

[0014] The insecticidal composition provided by the present invention is used to control agricultural pests, preferably vegetable whiteflies, etc.

[0015] The beneficial effects of the present invention: The compound synergist in the insecticidal composition of the present invention can significantly improve the comprehensive control effect of the bicycloprofen and flucycloxuron composition on the eggs, nymphs and adults of vegetable whiteflies, so that the insecticidal composition of the present invention shows excellent control efficacy on vegetable whiteflies. The knockdown speed of the insecticidal composition of the present invention on whiteflies is not only fast, but also has a long-lasting effect, improving the control effect of pests and having no adverse effect on the growth of vegetables themselves. Detailed implementation mode

[0016] The present invention will be further explained and illustrated below in conjunction with specific embodiments.

[0017] Formulation Examples

[0018] Example 1 12% Amphicyclaniliprole·Flucycloxuron Suspension Concentrate

[0019] Formulation: Amphicyclaniliprole 8%, Flucycloxuron 4%, compound synergist 8% (orange peel essential oil 3.2% + isomeric tridecyl alcohol ether carboxylate 4.8%), lignosulfonate 4.0%, sodium dodecyl sulfate 3.0%, silicone 0.2%, xanthan gum 0.2%, ethylene glycol 3%, sodium benzoate 0.2%, deionized water to make up 100%.

[0020] Example 2 4% Amphicyclaniliprole·Flucycloxuron Suspension Concentrate

[0021] Formulation: Amphicyclaniliprole 2%, Flucycloxuron 2%, compound synergist 3% (orange peel essential oil 1.5% + isomeric tridecyl alcohol ether carboxylate 1.5%), lignosulfonate 4.0%, sodium dodecyl sulfate 3.0%, silicone 0.2%, xanthan gum 0.2%, ethylene glycol 3%, sodium benzoate 0.2%, deionized water to make up 100%.

[0022] Example 3 30% Amphicyclaniliprole·Flucycloxuron Suspension Concentrate

[0023] Formulation: Amphicyclaniliprole 10%, Flucycloxuron 20%, compound synergist 20% (orange peel essential oil 8% + isomeric tridecyl alcohol ether carboxylate 12%), lignosulfonate 4.0%, sodium dodecyl sulfate 3.0%, silicone 0.2%, xanthan gum 0.2%, ethylene glycol 3%, sodium benzoate 0.2%, deionized water to make up 100%.

[0024] Preparation method: Mix deionized water, lignosulfonate, and sodium dodecyl sulfate evenly. While stirring, add silicone, ethylene glycol, and sodium benzoate, and mix evenly by high-speed shearing. Then add the technical amphicyclaniliprole, technical flucycloxuron, and compound synergist, continue to shear and mix evenly, and then enter a horizontal sand mill for primary and secondary sand grinding to make the particle size of all materials below 5 μm. Then add xanthan gum and shear evenly to obtain Example 1, Example 2, and Example 3.

[0025] Comparative Example 1

[0026] Formulation: Amphicyclaniliprole 8%, Flucycloxuron 4%, lignosulfonate 4.0%, sodium dodecyl sulfate 3.0%, silicone 0.2%, xanthan gum 0.2%, ethylene glycol 3%, sodium benzoate 0.2%, deionized water to make up 100%.

[0027] Comparative Example 2

[0028] Formulation: 8% of bipropyl dicylclaniliprole, 4% of flucycloxuron, 8% of orange peel essential oil, 4.0% of lignosulfonate, 3.0% of sodium dodecyl sulfate, 0.2% of silicone, 0.2% of xanthan gum, 3% of ethylene glycol, 0.2% of sodium benzoate, and deionized water to make up 100%.

[0029] Comparative Example 3

[0030] Formulation: 8% of bipropyl dicylclaniliprole, 4% of flucycloxuron, 8% of isomeric tridecanol ether carboxylate, 4.0% of lignosulfonate, 3.0% of sodium dodecyl sulfate, 0.2% of silicone, 0.2% of xanthan gum, 3% of ethylene glycol, 0.2% of sodium benzoate, and deionized water to make up 100%.

[0031] The preparation methods of Comparative Example 1, Comparative Example 2, and Comparative Example 3 are the same as above.

[0032] Examples of indoor bioassay tests

[0033] Dilute the above Examples 1, 2, 3, Comparative Example 1, Comparative Example 2, and Comparative Example 3 with water to prepare 20 ppm liquid medicine for standby.

[0034] For the tests of Bemisia tabaci eggs and nymphs, refer to "Pesticide Indoor Bioassay Test Guidelines - Insecticide Bioassay - Agar Moisture Retention Leaf Immersion Method" (NY / T 1154.16 - 2013). Preparation of agar plate: Add 0.90 g of agar powder to a 100 mL Erlenmeyer flask, then add 60 mL of deionized water, heat and dissolve it in a microwave oven until clear to prepare 15 g / L agar, and then measure 15 mL and pour it into a petri dish with a diameter of 9 cm to cool and solidify for standby. Leaf immersion: Take tomato leaves containing appropriate amounts of eggs or nymphs and soak them in the liquid medicine for 5 s, take them out, blot the residual liquid with absorbent paper, and place them on the agar for cultivation, with water as the control. Cultivation: Place the treated tomato leaves in a light incubator, and the cultivation conditions are (26 ± 2) °C, relative humidity 70% - 80%, L:D = 14 h:10 h. After treating the eggs for 10 d, check the results when all the eggs in the control group have hatched, record the total number of eggs and the number of hatched eggs. Hatching standard: After the eggs of Bemisia tabaci hatch, a yellow or light yellow dot will be formed on the leaf, and the number of hatched eggs is counted according to the number of dots. Check the results after treating the nymphs for 48 h, and record the total number of nymphs and the number of dead nymphs. Death standard: The disappearance of the insect body or the appearance of dark black is regarded as death. The test results are shown in Table 1.

[0035] Table 1 Indoor bioassay results of the formulated examples on Bemisia tabaci eggs and nymphs

[0036]

[0037]

[0038] As can be seen from Table 1, the mortality rates of Bemisia tabaci eggs and nymphs in Example 1, Example 2 and Example 3 are all higher than those in Comparative Example 1, Comparative Example 2 and Comparative Example 3, indicating that the compound synergist added in the composition of the present invention can significantly improve the control effect of the bixafen and flucycloxuron composition on Bemisia tabaci eggs and nymphs, and the improvement effect of the compound synergist is more obvious than that of the single synergist.

[0039] Example of field efficacy test

[0040] The test crop was greenhouse tomatoes with basically the same growth, and Bemisia tabaci infestation was relatively serious. Seven treatments were set up, namely Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 of the present invention and a water control. Each treatment was replicated 4 times, the plot area was 20 square meters, and the random block arrangement was used. The medicine was applied once at the 4-5 leaf stage of tomatoes, the liquid volume was 40 L / mu, and a knapsack manual sprayer was used.

[0041] The insect population base was investigated before applying the medicine, and the investigation was carried out once at 1 day, 7 days and 21 days after applying the medicine. Five plants were randomly investigated in each plot, and all the Bemisia tabaci adults on each plant were investigated before 7:00 in the morning. According to the insect population base before applying the medicine and the number of surviving adults after applying the medicine, the insect population reduction rate and the control effect were calculated, and the results are shown in Table 2.

[0042] Insect population reduction rate (%) = (number of adult insects before applying the medicine - number of surviving adult insects after applying the medicine) * 100 / number of adult insects before applying the medicine

[0043] Control effect (%) = (insect population reduction rate in the treatment area - insect population reduction rate in the blank control area) * 100 / (100 - insect population reduction rate in the blank control area)

[0044] Table 2 Control effect of the formulation example treatment on adult Bemisia tabaci of tomatoes

[0045]

[0046] As can be seen from Table 2, the insecticidal composition of the present invention shows excellent control effects on adult Bemisia tabaci of tomatoes, both in terms of quick-acting property and long-lasting property. The control effects of Example 1, Example 2 and Example 3 on adult Bemisia tabaci are significantly improved compared with those of Comparative Example 1, Comparative Example 2 and Comparative Example 3, indicating that the compound synergist added in the insecticidal composition of the present invention can significantly improve the control effect of the bixafen and flucycloxuron combination on adult Bemisia tabaci, and the improvement effect of the compound synergist is significantly better than that of the single synergist.

[0047] This specific embodiment is only an interpretation of the present application, and it does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. An insecticidal composition containing bicycloprofen and flucycloxuron, comprising the active ingredient bicycloprofen, the active ingredient flucycloxuron, a compound synergist, auxiliaries and fillers; wherein the mass content of bicycloprofen is 2% - 50%, the mass content of flucycloxuron is 2% - 50%, and the mass content of the compound synergist is 3% - 35%; the compound synergist includes orange peel essential oil and isomeric tridecyl alcohol ether carboxylate, and the mass ratio is orange peel essential oil:isomeric tridecyl alcohol ether carboxylate = 1:1 - 2:

3.

2. The pesticidal composition according to claim 1, wherein The insecticidal composition can be formulated into suspension concentrates, emulsifiable concentrates, microemulsions, wettable powders, water-dispersible granules, dispersible oil suspensions.

3. The pesticidal composition according to claim 2, wherein, The insecticidal composition can be formulated into suspension concentrates.

4. The pesticidal composition according to claim 3, characterized in that, In the suspension concentrate, the total mass content of the active ingredients bicycloprofen and flucycloxuron is 4% - 30%, and the mass content of the compound synergist is 3% - 20%.

5. The pesticidal composition according to claim 3, characterized in that, In the suspension concentrate, the auxiliaries include dispersants, wetting agents, defoamers, antifreezing agents, thickeners, preservatives.

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