CN113575608A - Insecticidal composition and application thereof - Google Patents
Insecticidal composition and application thereof Download PDFInfo
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- CN113575608A CN113575608A CN202110997597.1A CN202110997597A CN113575608A CN 113575608 A CN113575608 A CN 113575608A CN 202110997597 A CN202110997597 A CN 202110997597A CN 113575608 A CN113575608 A CN 113575608A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
- A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
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Abstract
The invention relates to an insecticidal composition comprising: a main agent and an auxiliary agent; the main agent comprises: the composition comprises rhamnolipid and acetamiprid, wherein the mass ratio of the rhamnolipid to the acetamiprid is 1:40-40: 1; the main agent accounts for 2 to 80 percent by mass; the auxiliary agent is 20-98% by mass percent. The acetamiprid has the characteristics of wide insecticidal spectrum, high activity, small dosage and long lasting effect, mainly takes contact killing and stomach poisoning effects during insecticidal action, can act on insect nerves, enables the insects to be excited abnormally through combination with acetyl receptors until the whole body is paralyzed and died, has good fungus inhibiting effect on rhamnolipid, has no pollution to the environment, is prepared and used with the acetamiprid, reduces the cost, has no pollution to the environment, and has good control effect on aphids by a compound preparation after the combination of the rhamnolipid and the acetamiprid.
Description
Technical Field
The invention relates to the technical field of pesticide disinsection, and particularly relates to an insecticidal composition and application thereof.
Background
Aphids, a kind of phytophagous insects, are also crop pests, are one of the most destructive pests on the earth, adult aphids or aphids clustered on the back of plant leaves, tender stems, growing points and flowers, and the juice of the plants is sucked by a needle-shaped sucking mouth device, so that cells are damaged, the growth is unbalanced, leaves are curled and shrunk to the back, the growth of heart leaves is blocked, the plants stop growing when the growth is serious, and even the whole plants wither and die. When aphids are harmful, a large amount of water and honeydew are discharged and drop on lower leaves to cause mycosis, so that physiological functions of the leaves are hindered, and accumulation of dry matters is reduced. At present, the prevention and control difficulty of aphids is getting bigger and bigger, and the prevention and control effect is not good.
Disclosure of Invention
Based on this, there is a need for an insecticidal composition and its use.
The technical scheme for solving the technical problems is as follows: an insecticidal composition comprising: a main agent and an auxiliary agent;
the main agent comprises rhamnolipid and acetamiprid, and the mass ratio of the rhamnolipid to the acetamiprid is 1:40-40: 1;
the weight of the main agent accounts for 2 to 80 percent of the weight of the insecticidal composition; the weight percentage of the auxiliary agent in the insecticidal composition is 20-98%.
In one embodiment, the adjuvant comprises modified montmorillonite, and the preparation method of the modified montmorillonite comprises the following steps:
adding montmorillonite into ultrapure water to obtain a montmorillonite aqueous solution, adding the montmorillonite aqueous solution into an ultrasonic cleaning machine, and performing ultrasonic dispersion for 12min to obtain a primary solution;
providing didodecyl dimethyl ammonium bromide, adding the didodecyl dimethyl ammonium bromide into water, heating and stirring to dissolve the didodecyl dimethyl ammonium bromide to obtain a didodecyl dimethyl ammonium bromide solution, adding the didodecyl dimethyl ammonium bromide solution into the primary solution, and performing shearing and emulsifying operation to obtain a secondary solution;
cooling the secondary solution to room temperature, performing freeze drying operation, performing grinding operation, and sieving with a 200-mesh sieve to obtain a mixture;
providing emamectin benzoate, and mixing the mixture with the emamectin benzoate to obtain the modified montmorillonite.
In one embodiment, the adjuvant comprises a foliar feed.
In one embodiment, the foliar feed comprises ammonium nitrate, potassium chloride and diammonium phosphate.
In one embodiment, the adjuvants further include dispersing agents, wetting agents, disintegrating agents, and fillers.
In one embodiment, the filler is at least one of kaolin, diatomaceous earth, bentonite, attapulgite, white carbon, and precipitated calcium carbonate.
In one embodiment, the insecticidal composition comprises, in parts by weight: 1-40 parts of rhamnolipid, 1-40 parts of acetamiprid, 2-8 parts of a dispersing agent, 1-10 parts of a wetting agent, 1-4 parts of a disintegrating agent, 1-4 parts of a filler, 3-8 parts of modified montmorillonite and 1-10 parts of a leaf fertilizer.
In one embodiment, the weight ratio of the rhamnolipid and the acetamiprid is 1:20-20: 1.
In one embodiment, the weight ratio of the rhamnolipid and the acetamiprid is 1:10-10: 1.
There is provided the use of an insecticidal composition as described in any one of the preceding examples for controlling aphids brassicae. ' Qiyi
The invention has the beneficial effects that: the invention provides an insecticidal composition, which is prepared from acetamiprid and rhamnolipid, wherein the acetamiprid has the characteristics of wide insecticidal spectrum, high activity, small dosage and long lasting effect, mainly takes contact killing and stomach poisoning effects during insecticidal, can act on insect nerves, enables insects to be excited abnormally by combining with acetyl receptors until the insects die due to general spasm and paralysis, has good fungus inhibiting effect on rhamnolipid, has no pollution to the environment, is prepared and used by combining the rhamnolipid and the acetamiprid, reduces the cost, has no pollution to the environment, improves the control effect by a compound preparation after the combination of the rhamnolipid and the acetamiprid, and has good control effect on aphids.
Detailed Description
The present invention may be embodied in many different forms and is not limited to the embodiments described herein for ease of understanding. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, an insecticidal composition comprises: a main agent and an auxiliary agent; the main agent comprises rhamnolipid and acetamiprid, and the mass ratio of the rhamnolipid to the acetamiprid is 1:40-40: 1; the weight of the main agent accounts for 2 to 80 percent of the weight of the insecticidal composition; the weight percentage of the auxiliary agent in the insecticidal composition is 20-98%.
In this example, the main agents constituting the pesticidal composition were rhamnolipid, which is a non-toxic and non-polluting anionic biosurfactant, and acetamiprid, which has both good chemical and biological properties. Has oil and water amphipathy. Acetamiprid belongs to a nicotine chloride compound, and can act on a nicotine acetylcholine receptor at a synaptic part of an insect nervous system, interfere stimulation conduction of the insect nervous system, cause obstruction of a nervous system channel, cause accumulation of neurotransmitter acetylcholine at the synaptic part, and further cause paralysis and death of the insect. After the two are mixed, the obtained insecticidal composition has no pollution to the environment, has excellent insecticidal effect and has high-efficiency control effect on semi-pterous aphids.
In order to make the mixing of the main agent more complete, in one embodiment, the auxiliary agent comprises modified montmorillonite, and the preparation method of the modified montmorillonite is as follows: adding montmorillonite into ultrapure water to obtain a montmorillonite aqueous solution, adding the montmorillonite aqueous solution into an ultrasonic cleaning machine, and performing ultrasonic dispersion for 12min to obtain a primary solution; providing didodecyl dimethyl ammonium bromide, adding the didodecyl dimethyl ammonium bromide into water, heating and stirring to dissolve the didodecyl dimethyl ammonium bromide to obtain a didodecyl dimethyl ammonium bromide solution, adding the didodecyl dimethyl ammonium bromide solution into the primary solution, and performing shearing and emulsifying operation to obtain a secondary solution; cooling the secondary solution to room temperature, performing freeze drying operation, performing grinding operation, and sieving with a 200-mesh sieve to obtain a mixture; providing emamectin benzoate, and mixing the mixture with the emamectin benzoate to obtain the modified montmorillonite.
Specifically, 1g of montmorillonite is dissolved in 100mL of ultrapure water, and then the montmorillonite is placed in an ultrasonic cleaning machine for ultrasonic dispersion for 12min to obtain a primary solution; completely dissolving didodecyl dimethyl ammonium bromide at 70-80 ℃, adding the didodecyl dimethyl ammonium bromide solution into the primary solution to obtain a mixed solution, keeping the temperature at 40 ℃, and shearing the mixed solution at 13000r/min for 20min by using a high-speed shearing emulsifying machine to obtain a secondary solution; and after the secondary solution is cooled to room temperature, freeze-drying and grinding the secondary solution, sieving the secondary solution by using a 200-mesh sieve to obtain a corresponding mixture, and then mixing the mixture with emamectin benzoate to obtain the modified montmorillonite. Montmorillonite has very strong adsorption capacity and cation exchange performance, on this basis, modifies montmorillonite through surfactant active, thus has improved the load performance of modified montmorillonite, makes its interlamellar spacing increase, modified montmorillonite also becomes lipophilicity from hydrophilicity, has strengthened the affinity of modified montmorillonite to organic pesticide, when modified montmorillonite mixes with rhamnolipid and acetamiprid and prepares, modified montmorillonite with rhamnolipid mixes more evenly, is convenient for the insecticidal composition poisons aphid, improves the prevention and cure effect of insecticidal composition to aphid.
In order to fertilize crops while killing insects, in one embodiment, the auxiliary agent comprises a foliar fertilizer, specifically, the foliar fertilizer is a fertilizer for directly applying nutrients required by crops to the foliar surface by taking foliar absorption as an aim, the leaf of the plant has an upper epidermis and a lower epidermis which are composed of epidermal cells, and a horny layer and wax on the outer side of the epidermal cells can protect mesophyll cells under epidermal tissues from photosynthesis, respiration and the like and are not influenced by changes of external adverse conditions. Therefore, the foliar fertilizer has the advantages of quick absorption, strong action, dosage saving and high efficiency.
Further, the foliar fertilizer comprises ammonium nitrate, potassium chloride and diammonium hydrogen phosphate. Specifically, when the ammonium nitrate, the potassium chloride and the diammonium hydrogen phosphate are used as foliar fertilizers, nutrients directly enter crops from leaves, so that the absorption speed is high, nutrient elements in the crops can be greatly increased in a short time, the fertilizer deficiency condition of the crops can be rapidly relieved, the maximum benefits of the ammonium nitrate, the potassium chloride and the diammonium hydrogen phosphate can be brought into play, the progress of various physiological processes in the crops can be effectively promoted through foliar fertilization, the photosynthesis intensity is remarkably improved, the activity of enzyme is improved, the synthesis, conversion and transportation of organic matters are promoted, the accumulation of dry matters is facilitated, the yield can be improved, and the quality can be improved.
In order to make the bonding between the main agents tighter, in one embodiment, the auxiliary agents further include a dispersing agent, a wetting agent, a disintegrating agent, and a filler. Specifically, the dispersing agent, the wetting agent, the disintegrating agent and the filler are uniformly mixed with the main agent of the insecticidal composition, so that the main agent can be mixed more uniformly and stably under the action of the dispersing agent, the wetting agent, the disintegrating agent and the filler, and the preparation and the use of the insecticidal composition are facilitated.
In order to make the rhamnolipid better mixed with the acetamiprid, in one embodiment, the filler is at least one of kaolin, diatomaceous earth, bentonite, attapulgite, white carbon and light calcium carbonate. Specifically, by adding the filler to the insecticidal composition, the insecticidal composition can occupy a certain space when mixed, the physical properties of the insecticidal composition can be improved, and the main agent can be pulverized and dispersed.
In one embodiment, the insecticidal composition comprises, in parts by weight: 1-40 parts of rhamnolipid, 1-40 parts of acetamiprid, 2-8 parts of a dispersing agent, 1-10 parts of a wetting agent, 1-4 parts of a disintegrating agent, 1-4 parts of a filler, 3-8 parts of modified montmorillonite and 1-10 parts of a leaf fertilizer. Specifically, the rhamnolipid, the acetamiprid, the dispersant, the wetting agent, the disintegrant, the foliar fertilizer and the filler are ball-milled by a ball mill according to a proportion to obtain a primary mixture, the primary mixture is put into a mixer to be uniformly mixed to obtain a secondary mixture, and the secondary mixture is crushed by a jet mill to obtain the insecticidal composition which is wettable powder.
In one embodiment, the dispersant is at least one of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene ether methyl ether condensate sulfate, alkyl sulfonate calcium salt, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene, fatty acid polyoxyethylene ester, fatty amine polyoxyethylene ether and glycerin fatty acid ester polyoxyethylene ether. Specifically, the dispersing agent is added into the main agent, so that the dispersing effect of the main agent is better, the main agent is uniformly dispersed in a system and is in a stable state, and the insecticidal effect of the insecticidal composition is more sufficient.
In one embodiment, the wetting agent is at least one of sodium dodecyl sulfate, calcium dodecyl benzene sulfonate, nekal, wetting penetrant, alkyl benzene sulfonate polyoxyethylene triphenyl-ethylene phenyl phosphate, Chinese honeylocust fruit powder, silkworm excrement and soapberry powder. Specifically, the wetting agent can reduce the surface tension or interfacial tension of water, so that the solid surface can be wetted by the water, and the main agent can be wetted and spread on the surfaces of crops and insects, thereby improving the control effect and reducing the occurrence of phytotoxicity.
In one embodiment thereof, the disintegrant is at least one of bentonite, urea, ammonium sulfate, aluminum chloride, citric acid, succinic acid, and sodium bicarbonate. Specifically, the disintegrant can achieve disintegration by eliminating binding force due to a binder or high compression, and when the disintegrant is mixed with the main agent, agglomeration of the main agent can be prevented, thereby improving the pesticidal effects of the rhamnolipid and the acetamiprid.
In one embodiment, the weight ratio of the rhamnolipid and the acetamiprid is 1:20-20: 1. Particularly, the rhamnolipid and the acetamiprid have stably improved insecticidal effect under the condition of the proportion, and the rhamnolipid has no pollution to the environment, so that the insecticidal effect of the insecticidal composition is improved, and the environment is protected.
In one embodiment, the weight ratio of the rhamnolipid and the acetamiprid is 1:10-10: 1. Specifically, the acetamiprid causes damage to the nervous system of aphids, the rhamnolipid can be biodegraded after being sprayed, and after the rhamnolipid and the rhamnolipid are combined, the spraying amount of pesticides is effectively reduced, the cost required by pesticide degradation is reduced, and the method is environment-friendly and pollution-free.
In one embodiment, the adjuvant further comprises pyrethrin, which is a poison to a variety of insects. After the insect contacts with the pyrethrin, the insect can be excited and dyskinesia within two minutes, and the insect can be knocked down and paralyzed rapidly. Pyrethrin is a typical nerve poison, directly acts on excitable membrane, interferes with ion conduction of the membrane, mainly affects sodium channels of the nerve membrane, delays disappearance process of sodium conduction increase during excitation, prolongs transmembrane sodium ion flow, causes repeated activity of sensory nerve fibers and motor nerve axes, depolarizes transient nerve cells and continuously contracts muscles, and inhibits ion conduction of the nerve membrane at high concentration to block excitation. When the composition is combined with the rhamnolipid and the acetamiprid for use, aphids are quickly killed, the synergistic effect is obvious, and the composition can be decomposed into water and carbon monoxide after being exposed to light in the environment and is harmless to people and livestock.
In one embodiment, the adjuvant further comprises matrine, specifically, matrine is a botanical pesticide with specific and natural characteristics, and can be rapidly decomposed in nature, and the final products are carbon dioxide and water. The matrine is not easy to cause the pest to generate drug resistance due to the combined action of a plurality of chemical substances, can be used for a long time, can not directly and completely poison the corresponding pest, but can not seriously influence the production and the multiplication of the plant population by controlling the number of the pest biological populations. The matrine and the rhamnolipid are combined with the acetamiprid for use, the dosage of the rhamnolipid is reduced to a certain extent, and the insecticidal effect of the insecticidal composition is more excellent, the prevention and treatment effect on aphids is excellent, and the insecticidal composition is non-toxic and harmless to the environment.
In one embodiment, there is provided the use of an insecticidal composition as described in any one of the above embodiments for controlling aphids brassicae. Specifically, the acetamiprid acts on a nicotinic acetylcholine receptor of the brevicoryne brassicae to interfere stimulation conduction of an insect nervous system, so that the brevicoryne brassicae is killed, and the rhamnolipid has a synergistic effect on the insecticidal effect of the acetamiprid and can effectively prevent and treat the brevicoryne brassicae.
Examples 1 to 9 and comparative examples 1 to 2
The insecticidal compositions of examples 1-9 and comparative examples 1-2, wherein the insecticidal compositions comprise the components shown in table 1 in parts by mass.
TABLE 1 compounding ratio of examples and comparative examples
The formulations of examples 1-9 in table 1 were prepared according to the following procedure:
mixing rhamnolipid, modified montmorillonite, acetamiprid, dispersant, wetting agent, disintegrating agent, filler, matrine and pyrethrin according to a ratio, and performing ball milling by using a ball mill to obtain a primary mixture; then putting the first-stage mixture into a mixer and uniformly mixing to obtain a second-stage mixture; and crushing the secondary mixture by a jet mill to obtain the insecticidal composition.
The preparation method of the modified montmorillonite comprises the following steps:
dissolving 1g of montmorillonite in 100mL of ultrapure water, and placing the montmorillonite in an ultrasonic cleaning machine for ultrasonic dispersion for 12min to obtain a primary solution; completely dissolving didodecyl dimethyl ammonium bromide at 70-80 ℃, adding the didodecyl dimethyl ammonium bromide solution into the primary solution to obtain a mixed solution, keeping the temperature at 40 ℃, and shearing the mixed solution at 13000r/min for 20min by using a high-speed shearing emulsifying machine to obtain a secondary solution; and after the secondary solution is cooled to room temperature, freeze-drying and grinding the secondary solution, sieving the secondary solution by a 200-mesh sieve to obtain a corresponding product, and mixing the product with the emamectin benzoate to obtain the montmorillonite.
Comprehensive virulence determination
Comprehensive toxicity measurements were performed using the insecticides prepared in examples 2, 4 to 9, and 1 to 2 as examples.
The test method comprises the following steps: the insect immersion method is adopted by referring to 'indoor bioassay test criteria for pesticides NY/T1154.6-2006'.
Carrying out statistical analysis by using DPS statistical analysis software, calculating EC50 of each medicament, and calculating the co-toxicity coefficient (CTC value) of the mixture according to a Sun Yunpei method, wherein, a single dose of rhamnolipid is taken as a standard reagent, namely, the insecticidal composition of comparative example 1 is taken as the standard reagent, and the co-toxicity coefficient (CTC) is more than or equal to 120 and shows a synergistic effect; the co-toxicity coefficient (CTC) is less than or equal to 80, and the antagonism is shown; 80 < co-toxicity coefficient (CTC) < 120 showed additive effects.
TABLE 2 determination of the Integrated virulence of Rhamnioglycolipids and acetamiprid and their Mixed combinations on Brassica oleracea aphids
As can be seen from the table 2, the invention takes the combination of the rhamnolipid and the acetamiprid as effective components, when the rhamnolipid and the acetamiprid are combined in the proportion range of 1-40 to 40-1, the insecticidal effect of each example is higher than that of the comparative example 1 and the comparative example 2, and the insecticidal effect of the compound preparation is greater than that of a single agent; the insecticidal compositions show obvious synergistic effect within the proportion range of 1-40 to 40-1, and the co-toxicity coefficients are all larger than 120, wherein the insecticidal compositions prepared by the rhamnolipid and the acetamiprid in the proportion of 10:1 have the most obvious synergistic effect, and the co-toxicity coefficients are far higher than 120; after the rhamnolipid and the acetamiprid are mixed with the modified montmorillonite, the matrine and the pyrethrin according to the proportion of 10:1, the insecticidal effect and the synergistic effect are more obvious, and the insecticidal effect of the insecticidal composition is favorably improved.
Field test
The test method comprises the following steps: at 5 random points in the test treatment area, 3 plants were investigated at each point, each marked with 1 leaf with sufficient aphid number to count the aphids in the whole leaf.
Investigation time and number of times
The test is carried out for 3 times, and the number of the living aphids is investigated for the base number before the drug and 1 day, 3 days and 7 days after the drug.
Drug effect calculation method
Phytotoxicity investigation method
After the pesticide is applied, whether the pesticide has phytotoxicity to crops is continuously visually observed.
TABLE 4 field Effect of rhamnolipid and acetamiprid and their blend combinations on Brassica oleracea aphids
As can be seen from table 4, after the rhamnolipid and the acetamiprid are compounded, the control on cabbage aphids is better than that of comparative example 1 and comparative example 2, the insecticidal action of the rhamnolipid and the acetamiprid is more remarkable after the modified montmorillonite is added, and the cabbage grows normally after observation, which indicates that the insecticidal composition is harmless to the cabbage, i.e. the insecticidal composition is not toxic to the cabbage while killing the aphids.
With the combination of tables 2-4, the insecticidal composition prepared according to the proportion of example 5 has excellent control effect, the insecticidal composition prepared according to example 8 by adding the modified montmorillonite is more excellent in control effect, the insecticidal composition prepared according to example 9 by adding the modified montmorillonite, the pyrethrin and the matrine is most excellent in control effect, the co-toxicity coefficient of the three is higher than that of other examples and comparative examples, the synergistic effect is very obvious, and the insecticidal composition is harmless to cabbage as can be seen from field tests, so that the insecticidal composition containing rhamnolipid and acetamiprid has good control effect on cabbage aphids. The application range is widened while the control effect is improved, the cost is reduced, the effect of treating multiple pests by one drug is achieved, manpower and material resources are reduced, and the production benefit is improved. The acetamiprid has the characteristics of wide insecticidal spectrum, high activity, small dosage and long lasting effect, mainly takes the effects of contact killing and stomach poisoning during insecticidal action, can act on insect nerves, enables the insects to be excited abnormally through combination with acetyl receptors until the whole body is paralyzed and paralyzed, has good fungus inhibiting effect on rhamnolipid, has no pollution to the environment, and has good control effect on aphids by preparing the rhamnolipid and the acetamiprid.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An insecticidal composition comprising: a main agent and an auxiliary agent;
the main agent comprises rhamnolipid and acetamiprid, and the mass ratio of the rhamnolipid to the acetamiprid is 1:40-40: 1;
the weight of the main agent accounts for 2 to 80 percent of the weight of the insecticidal composition; the weight percentage of the auxiliary agent in the insecticidal composition is 20-98%.
2. An insecticidal composition according to claim 1 wherein said adjuvant comprises a modified montmorillonite prepared by a process comprising:
adding montmorillonite into ultrapure water to obtain a montmorillonite aqueous solution, adding the montmorillonite aqueous solution into an ultrasonic cleaning machine, and performing ultrasonic dispersion for 12min to obtain a primary solution;
providing didodecyl dimethyl ammonium bromide, adding the didodecyl dimethyl ammonium bromide into water, heating and stirring to dissolve the didodecyl dimethyl ammonium bromide to obtain a didodecyl dimethyl ammonium bromide solution, adding the didodecyl dimethyl ammonium bromide solution into the primary solution, and performing shearing and emulsifying operation to obtain a secondary solution;
cooling the secondary solution to room temperature, performing freeze drying operation, performing grinding operation, and sieving with a 200-mesh sieve to obtain a mixture;
providing emamectin benzoate, and mixing the mixture with the emamectin benzoate to obtain the modified montmorillonite.
3. An insecticidal composition according to claim 2 wherein said adjuvant further comprises a foliar feed.
4. An insecticidal composition according to claim 3 wherein said foliar feed comprises ammonium nitrate, potassium chloride and diammonium hydrogen phosphate.
5. An insecticidal composition according to claim 3, wherein said adjuvants further comprise dispersing agents, wetting agents, disintegrating agents and fillers.
6. The insecticidal composition according to claim 5, wherein the filler is at least one of kaolin, diatomaceous earth, bentonite, attapulgite, white carbon and light calcium carbonate.
7. The insecticidal composition as claimed in claim 5, wherein the insecticidal composition comprises, in parts by weight: 1-40 parts of rhamnolipid, 1-40 parts of acetamiprid, 2-8 parts of a dispersing agent, 1-10 parts of a wetting agent, 1-4 parts of a disintegrating agent, 1-4 parts of a filler, 3-8 parts of modified montmorillonite and 1-10 parts of a leaf fertilizer.
8. An insecticidal composition according to claim 1 wherein the weight ratio of said rhamnolipid and acetamiprid is 1:20-20: 1.
9. An insecticidal composition according to claim 1 wherein the weight ratio of said rhamnolipid and acetamiprid is 1:10-10: 1.
10. Use of the insecticidal composition according to claim 9 for controlling brevicoryne brassicae.
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