CN115606595A - Pesticide composition and application thereof - Google Patents
Pesticide composition and application thereof Download PDFInfo
- Publication number
- CN115606595A CN115606595A CN202211261652.1A CN202211261652A CN115606595A CN 115606595 A CN115606595 A CN 115606595A CN 202211261652 A CN202211261652 A CN 202211261652A CN 115606595 A CN115606595 A CN 115606595A
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- CN
- China
- Prior art keywords
- pesticide
- bacillus thuringiensis
- composition
- diamide
- pesticide composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Images
Classifications
-
- 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
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
-
- 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
- A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
- A01N63/20—Bacteria; Substances produced thereby or obtained therefrom
- A01N63/22—Bacillus
- A01N63/23—B. thuringiensis
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P7/00—Arthropodicides
- A01P7/04—Insecticides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The application relates to the technical field of pesticides, and provides a pesticide composition which comprises effective components and auxiliary components acceptable in pesticides, wherein the effective components contain m-diamide pesticides and bacillus thuringiensis, 50000 IU/mg of the bacillus thuringiensis is set as 100% of the raw pesticides, and the mass ratio of the m-diamide pesticides to the bacillus thuringiensis is (1-50): (50-1). The m-diamide pesticide contained in the pesticide composition provided by the application acts on the nervous system of pests to destroy the normal conduction of nerve impulses of the insects, so that the insects can be killed by overexcitation and convulsion; the bacillus thuringiensis acts on the intestinal tract of pests, grows and multiplies in a proper alkaline environment in the intestinal tract, so that intestinal paralysis, perforation, insect body paralysis and the like are caused, and the pests stop eating and are killed; therefore, the pesticide composition has the advantages of good control effect, less pesticide application times, low cost and the like under the synergistic effect of the m-diamide pesticide and the bacillus thuringiensis.
Description
Technical Field
The application belongs to the technical field of pesticides, and particularly relates to a pesticide composition and application thereof.
Background
Rice borers, such as chilo suppressalis, have been the major pests of most single and double cropping rice in the Yangtze river watershed since the 80's of the 20 th century; with the use of efficient medicaments such as triazophos, monosultap, chlorantraniliprole and the like, the chilo suppressalis gradually declines to become the third largest pest behind the rice leaf rollers and rice planthoppers. However, with the adjustment of high-efficiency agriculture and planting industry structures and the generation of drug resistance to conventional medicaments such as triazophos, monosultap, chlorantraniliprole and the like, the chilo suppressalis has a continuous rising situation, and the rice production in China is greatly threatened.
In the actual agricultural production process, the application of chemical pesticide preparation is the most effective means for controlling plant diseases and pests, such as cyflumetofen (molecular formula: C) 28 H 17 BrF 12 N 2 O 2 ) Developed by Shanghai Tahe chemical industry Co., ltd, broflanilide is developed by the cooperation of Mitsui agricultural chemical company and Pasteur in Japan as a new generation of bisamide insecticide, and can be used for preventing and treating lepidoptera and coleopteran pests of vegetables, perennial crops and grains, and sanitary pests such as termites, mosquitoes, flies, cockroaches and the like. However, when chemical pesticide preparations are used for preventing and controlling pests, the pests are very easy to generate drug resistance, and a series of environmental problems such as residue and pollution of the pesticide preparations are easily caused by continuously applying a single chemical pesticide preparation with high dose for a long time.
Bacillus thuringiensis (Bt for short) is used as microbial pesticide, and its main active component is one or several insecticidal lattice proteins, also called delta-endotoxin, and is effective for lepidoptera, coleopteran, diptera, hymenoptera and homoptera insects, and possesses the advantages of specificity, high efficiency and safety for human body and animals. However, bt preparations are greatly influenced by the environment, are insensitive to old larvae, have short field lasting period, are unstable in the genetic character of recombinant engineering strains and the like in production and prevention, and limit the popularization and the application of Bt.
Therefore, the development of pesticide compositions for controlling lepidopteran pests such as borers and the like, which are efficient and are not easy to generate drug resistance, is urgently needed.
Disclosure of Invention
The application aims to provide a pesticide composition and application thereof, and aims to solve the problems that the existing single chemical pesticide is easy to cause drug resistance of pests, causes pesticide preparation residues and pollutes the environment.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the application provides a pesticide composition, which comprises an effective component and auxiliary components acceptable in pesticides, wherein the effective component contains a m-diamide pesticide and bacillus thuringiensis, the mass ratio of the m-diamide pesticide to the bacillus thuringiensis is (1-50): (50-1).
In a second aspect, the present application provides the use of a pesticidal composition for controlling an agricultural pest.
Compared with the prior art, the method has the following beneficial effects:
the pesticide composition provided by the first aspect of the application contains the effective components of the m-diamide insecticide and bacillus thuringiensis, wherein the m-diamide insecticide is mainly used as a nerve poison, acts on the nervous system of pests, destroys the normal conduction of nerve impulses of the insects, can cause the insects to be over excited and twitch to kill the insects, and has the advantages of good permeability, quick response, small dosage and good control effect by means of stomach toxicity and contact killing; the bacillus thuringiensis acts on the intestinal tract of pests and grows and breeds in a proper alkaline environment in the intestine, and the crystal toxin is hydrolyzed by protease in the intestinal tract of the pests to form smaller toxic subunits which can act on the epithelial cells of the midgut of the pests, so that intestinal paralysis, perforation, paralytic of the pests and the like are caused, and the pests stop eating and are killed; therefore, the pesticide composition contains the m-diamide insecticides and the bacillus thuringiensis which have different action mechanisms, the advantage complementation between the microbial pesticide and the excellent variety of the chemical pesticide is utilized, the mechanism complementation between the nerve toxicant and the stomach toxicant is utilized, the quick-acting property and the lasting property of the m-diamide insecticides are exerted, the defect of slow action effect of the bacillus thuringiensis is overcome, the increase of action sites is facilitated, the prevention and treatment spectrum is enlarged, the drug resistance of pests is delayed, the remarkable synergistic effect is achieved, the prevention and treatment effect is obviously higher than that of a single dose, the application amount and the application frequency of the m-diamide insecticides on rice and vegetables can be reduced, the risks of pesticide residue and environmental pollution are reduced, and the tendency of reduced application is met.
The pesticide composition provided by the second aspect of the application has different action mechanisms of the m-diamide insecticides and the bacillus thuringiensis, and the m-diamide insecticides and the bacillus thuringiensis contained in the pesticide composition are compounded to achieve complementary and synergistic effects, so that the pesticide composition provided by the embodiment of the application can be widely applied to prevention and treatment of agricultural pests, and has the advantages of being small in application frequency and application amount, low in cost, few in pesticide residue, good in prevention and treatment effect and good in resistance delaying effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a structural formula of a m-diamide insecticide contained in a pesticide composition provided by an embodiment of the application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
In this application, the term "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (one) of a, b, or c," or "at least one (one) of a, b, and c," may each represent: a, b, c, a-b (i.e. a and b), a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The first aspect of the embodiments of the present application provides a pesticide composition, including an active ingredient and an acceptable auxiliary ingredient in a pesticide, the active ingredient contains a m-diamide pesticide and a bacillus thuringiensis, the bacillus thuringiensis is set to be 100% of raw pesticide with 50000 IU/mg raw pesticide, and the mass ratio of the m-diamide pesticide to the bacillus thuringiensis is (1-50): (50-1). Wherein IU is a unit of medical potency, 50000 IU/mg in the examples of the present application means that the content of Bacillus thuringiensis per mg of Bacillus thuringiensis bulk drug is 50000IU.
The pesticide composition provided by the embodiment of the application contains the effective components of the m-diamide insecticide and bacillus thuringiensis, wherein the m-diamide insecticide is mainly used as a nerve poison, acts on the nervous system of pests, destroys the normal conduction of nerve impulses of the insects, can cause the insects to be over excited and twitch to kill the insects, and has the advantages of good permeability, quick response, small dosage and good control effect by means of stomach toxicity and contact killing; the bacillus thuringiensis acts on the intestinal tract of pests, grows and breeds in a proper alkaline environment in the intestine, and the crystal toxin is hydrolyzed by protease in the intestinal tract of the pests to form a smaller subunit with toxic effect which can act on the epithelial cells of the midgut of the pests, so that intestinal paralysis, perforation, paralysis and the like of the pests are caused, and the pests stop eating and are killed; therefore, the pesticide composition contains the m-diamide insecticides and the bacillus thuringiensis which have different action mechanisms, the advantage complementation between the microbial pesticide and the excellent variety of the chemical pesticide is utilized, the mechanism complementation between the nerve toxicant and the stomach toxicant is utilized, the quick-acting property and the lasting property of the m-diamide insecticides are exerted, the defect of slow action effect of the bacillus thuringiensis is overcome, the increase of action sites is facilitated, the prevention and treatment spectrum is enlarged, the drug resistance of pests is delayed, the remarkable synergistic effect is achieved, the prevention and treatment effect is obviously higher than that of a single dose, the application amount and the application frequency of the m-diamide insecticides on rice and vegetables can be reduced, the risks of pesticide residue and environmental pollution are reduced, and the tendency of reduced application is met.
In a preferred embodiment, the mass ratio of the m-diamide insecticide to the bacillus thuringiensis is (1-20): (20-1), for example, 1: 20. 1: 1. 2: 3. 3: 5. 4: 3. 5: 4. 5: 16. 15: 4. 20:1. within the mass ratio range, the m-diamide pesticide has the most obvious synergistic effect with the bacillus thuringiensis, and can have the most excellent control effect under the condition of the minimum application amount, so that the control cost is low, and the drug resistance is well delayed.
In the embodiment, the weight of the m-diamide insecticide accounts for 1-50%, preferably 5-30%, more preferably 5% and 20% of the total weight of the pesticide composition, based on 100% of the total weight of the pesticide composition; the mass of the bacillus thuringiensis accounts for 1 to 50 percent of the total mass of the pesticide composition, preferably 5 to 30 percent, and more preferably 16 percent and 32 percent. Within the mass percentage content range of the m-diamide pesticide and the bacillus thuringiensis provided by the embodiment of the application, the pesticide composition has a remarkable synergistic effect, and has the advantages of small unit dosage, good quick-acting performance, long lasting period and the like, so that the pest control effect is good.
In an embodiment, the m-diamide insecticide comprises at least one of cyflumetofen and bromofenoxanil. For example, the m-diamide insecticide can be flubendiamide, and can also be cyflumetofen. Wherein the IUPAC name of cyhalothrin is 3' - [ ({ 2-bromo-4- [1, 2-tetrafluoro-1- (trifluoromethyl) ethyl group)]-6- (trifluoromethyl) phenyl } amino) carbonyl]-N- (cyclopropylmethyl) -2', 4-difluorobenzanilide; CAS name: n- [3- [ [ [ 2-bromo-4- [1, 2-tetrafluoro-1- (trifluoromethyl) ethyl ] methyl ] ethyl]-6- (trifluoromethyl) phenyl]Amino group]Carbonyl radical]-2-fluorophenyl group]-N- (cyclopropylmethyl) -4-fluorobenzamide with the molecular formula C 28 H 17 BrF 12 N 2 O 2 Relative molecular mass 721.33; the fluorine content was 31.61%. The chemical name of the flubendiamide is 3-benzamido-N- (4-heptafluoro isopropyl aniline-2-methyl) phenyl) benzamide, and the molecular formula is C 25 H 14 F 11 BrN 2 O 2 . The cyflumetofen and the brobendiamide both belong to insect GABA (Gamma amino acid butyric acid) gated chloride channel allosteric modulators and can be used for treating insect pestsThe normal conduction of insect nerve impulse is damaged, so that the insects die due to overexcitation and twitch, and the control effect on agricultural pests is achieved.
The source of Bacillus thuringiensis is not particularly limited, and commercially available products of Bacillus thuringiensis commonly used in the art can be used. Bacillus thuringiensis (Bt), a group of crystal bacilli that includes many varieties, produces two major classes of toxins, including endotoxins (parasporal crystals) and exotoxins (alpha, beta, and gamma exotoxins). The parasporal crystals are main toxins, and in the alkaline midgut of pests, the intestinal tracts of the pests can be paralyzed within a few minutes, so that the pests stop eating and quickly destroy the intestinal intima, vegetative cells of bacteria are easy to invade and penetrate the intestinal basement membrane to enter blood lymph, and finally the pests die due to hunger and septicemia. While exotoxins are slow but act significantly during molting and metamorphosis, which are the peak phases of RNA synthesis, exotoxins inhibit DNA-dependent RNA polymerase. Therefore, the pesticide composition can be widely applied to the control of hemiptera, lepidoptera and coleoptera pests due to the containing of the bacillus thuringiensis.
In the embodiment, the pesticide composition comprises any one of water dispersible granules, suspending agents and wettable powder. The auxiliary components comprise at least one of dispersant, wetting agent, disintegrant, antifreeze, thickener, defoamer, penetration enhancer, pH regulator and filler. For example, when the formulation of the pesticidal composition is a wettable powder, the auxiliary ingredients of the pesticidal composition may include a dispersing agent, a wetting agent and a filler. When the formulation of the pesticidal composition is a water dispersible granule, the auxiliary ingredients of the pesticidal composition may include a dispersant, a wetting agent, a disintegrant, and a filler. When the formulation of the pesticidal composition is a suspension agent, the auxiliary ingredients of the pesticidal composition may include a dispersing agent, a wetting agent, an antifreezing agent, a thickening agent, an antifoaming agent and water.
In an embodiment, the dispersant may be at least one selected from sodium lignosulfonate, calcium lignosulfonate, nekal, calcium dodecylbenzenesulfonate, polycarboxylate, calcium alkylbenzenesulfonate, sodium alkylsulfonate, alkylphenol ethoxylate, fatty amine ethoxylate, fatty acid polyoxyethylene ester, and glycerin fatty acid ester ethoxylate. For example, the dispersant may be a polycarboxylate, and may also be calcium lignosulfonate. The dispersing agent can improve and improve the dispersing performance of solid or liquid materials, and can effectively prevent the sedimentation or agglomeration of the m-diamide insecticides, the bacillus thuringiensis and the like, thereby improving the insecticidal effect.
In an embodiment, the wetting agent may be selected from at least one of sodium methyl naphthalene sulfonate formaldehyde condensate, sodium dodecyl sulfate, sodium alkyl naphthalene sulfonate, calcium alkyl benzene sulfonate, tea seed cake, chinese honeylocust fruit powder, silkworm excrement, soapberry powder, sodium lauryl sulfate, washing powder, and nekal. For example, the humectant may be powdered saponin, and may also be powdered nekal. The wetting agents have strong wetting effect, can fully wet the m-diamide insecticides, the bacillus thuringiensis and the like, and promote the cyhalothrin, the bacillus thuringiensis and the like to fully exert the effect, thereby improving the insecticidal effect.
In an embodiment, the disintegrant may be selected from at least one of ammonium sulfate, urea, bentonite, aluminum chloride, citric acid, succinic acid, sodium bicarbonate. For example, the disintegrant may be ammonium sulfate, and may also be urea. The disintegrating agent can improve the disintegrating effect of the water dispersible granule in water, thereby fully playing the efficacy of the m-diamide pesticide and the bacillus thuringiensis.
In an embodiment, the anti-freezing agent may be selected from at least one of glycerol, urea, ethylene glycol, propylene glycol. For example, the antifreeze agent can be glycerol and also can be propylene glycol. The thickener can be at least one selected from xanthan gum, hydroxymethyl cellulose, methyl cellulose, magnesium aluminum silicate, and polyvinyl alcohol. For example, the thickener may be hydroxymethyl cellulose, and may also be methyl cellulose. The defoaming agent may be selected from silicone-based defoaming agents.
In an embodiment, the filler may be selected from at least one of white carbon black, kaolin, light calcium carbonate, talc, montmorillonite, attapulgite, pumice, crushed brick, sepiolite, bentonite, non-adsorptive calcareous earth, sand. For example, the filler may be kaolin or bentonite. The fillers can adjust the content of effective components and promote the m-diamide insecticides and the bacillus thuringiensis to play a role.
In the embodiment, the pesticide composition is in the form of wettable powder, and the wettable powder comprises the following components in percentage by weight:
in an embodiment, a method for preparing a wettable powder, comprising the steps of: mixing the m-diamide pesticide, the bacillus thuringiensis, the dispersing agent, the wetting agent and the filler, putting the mixture into a stirring kettle, uniformly stirring, and then crushing by using an airflow crusher to obtain the wettable powder.
In a further embodiment, the wettable powder of the pesticide composition may comprise the following components in percentage by weight: 5 to 30 percent of m-diamide insecticide, 5 to 30 percent of bacillus thuringiensis, 3 to 10 percent of dispersant, 1 to 5 percent of wetting agent and 20 to 50 percent of filler.
In the embodiment, the pesticide composition is in the form of water dispersible granules, and the water dispersible granules comprise the following components in percentage by weight:
in an embodiment, the preparation method of the water dispersible granule comprises the following steps: uniformly mixing the m-diamide insecticide, bacillus thuringiensis, the dispersing agent, the wetting agent, the disintegrating agent and the filler, and then sequentially carrying out crushing treatment, granulation treatment, drying treatment and screening treatment to obtain the water dispersible granule. Wherein the pulverization treatment is carried out in an ultramicro jet mill, and the granulation treatment is carried out in an extrusion granulator.
In a further embodiment, the water dispersible granules of the pesticide composition can comprise the following components in percentage by weight: 5 to 30 percent of m-diamide insecticide, 5 to 30 percent of bacillus thuringiensis, 3 to 10 percent of dispersant, 1 to 10 percent of wetting agent, 1 to 5 percent of disintegrant and 20 to 50 percent of filler.
In the embodiment, the pesticide composition is in the form of a suspending agent, and the suspending agent comprises the following components in percentage by weight:
in an embodiment, a method of making a suspension formulation comprises the steps of: uniformly mixing a dispersing agent, a wetting agent, an antifreezing agent, a thickening agent, a defoaming agent and water, then adding a m-diamide insecticide and bacillus thuringiensis, and sanding for 1-3 h in a horizontal sand mill with the rotating speed of 2000r/min to obtain the suspending agent of the pesticide composition with the particle size D90 of 5 microns.
In a further embodiment, the suspending agent of the pesticide composition comprises the following components in percentage by weight: 5 to 30 percent of m-diamide insecticide, 5 to 30 percent of bacillus thuringiensis, 5 to 20 percent of dispersant, 1 to 10 percent of wetting agent, 1 to 5 percent of antifreezing agent, 0.1 to 2 percent of thickening agent, 0.1 to 0.8 percent of defoaming agent and 20 to 70 percent of water.
In a second aspect, the embodiments of the present application provide a use of a pesticide composition for controlling agricultural pests.
The pesticide composition provided by the embodiment of the application is applied to preventing and treating agricultural pests, and because the action mechanisms of the m-diamide pesticide and the bacillus thuringiensis contained in the pesticide composition are different, and the m-diamide pesticide and the bacillus thuringiensis are compounded to play a role in complementation and synergism, the pesticide composition provided by the embodiment of the application can be widely applied to preventing and treating the agricultural pests, and has the advantages of being few in pesticide application times and application amount, low in cost, few in pesticide residue, good in prevention and treatment effect and good in resistance delaying effect.
In an embodiment, the pest includes at least one of hemiptera, lepidoptera, coleoptera. For example, hemiptera includes diaphorina citri, planthopper oryzae, planthopper laodelphax striatellus, planthopper albopictus, bemisia tabaci, mealybugs, wheat aphids, peach aphids, cotton aphids, celery aphids, mirid bugs. The lepidoptera comprises diamondback moth, tobacco budworm, tobacco hornworm, beet armyworm, spodoptera frugiperda, cabbage silver leaf moth, tomato hornworm, codling moth, leaf roller moth, cabbage butterfly, cabbage borer, corn borer, carposina niponensis walsingham, cotton bollworm, rice leaf roller and rice stem borer. Coleoptera includes potato beetle, lecanicillium lecanii, and Lecanicillium lecanii.
The following description will be given with reference to specific examples.
Example 1
The embodiment provides a suspending agent of a pesticide composition, which comprises the following components in percentage by weight:
example 2
The embodiment provides a suspending agent of a pesticide composition, which comprises the following components in percentage by weight:
example 3
The embodiment provides a suspending agent of a pesticide composition, which comprises the following components in percentage by weight:
example 4
The embodiment provides a suspending agent of a pesticide composition, which comprises the following components in percentage by weight:
example 5
The embodiment provides a water dispersible granule of a pesticide composition, which comprises the following components in percentage by weight:
example 6
The embodiment provides a water dispersible granule of a pesticide composition, which comprises the following components in percentage by weight:
example 7
The embodiment provides a wet powder of a pesticide composition, which comprises the following components in percentage by weight:
example 8
The embodiment provides a wet powder of a pesticide composition, which comprises the following components in percentage by weight:
example 9
The embodiment provides a wet powder of a pesticide composition, which comprises the following components in percentage by weight:
comparative example 1
The comparative example provides a wettable powder of a pesticide composition, which comprises the following components in percentage by weight:
comparative example 2
The comparative example provides a wettable powder of a pesticide composition, which comprises the following components in percentage by weight:
and (3) relevant performance test analysis:
1. indoor biological activity determination:
(1) Indoor biological activity determination of pesticide composition containing cyflumetofen and bacillus thuringiensis for preventing and treating rice stem borers:
test subjects: collecting chilo suppressalis egg masses in the paddy field, incubating indoors, and feeding larvae under the following conditions: the photoperiod is 16h (illumination) +8h (darkness), the illumination is 1500-2000 lx, the temperature is (26 +/-1) DEG C, and the relative humidity is 60-70%.
Reagent to be tested: the preparation method comprises the steps of determining effective lethal concentration ranges of a single cyclopropanolomide agent, a single bacillus thuringiensis agent and different mixed cyclopropanolomide and bacillus thuringiensis agents through a preliminary test, respectively designing five gradient concentration treatments according to effective component contents for each agent, and taking blank treatment without raw medicines as a comparison.
The test method comprises the following steps: during the test, the single dose of cyhalothrin, the single dose of bacillus thuringiensis, different cyhalothrin and different rods of bacillus thuringiensis are respectively usedThe mother liquor of the mixed agent is diluted into 5 series of gradient concentrations and respectively placed in a beaker for standby. By adopting a method of soaking firstly and then inoculating insects, cutting cane shoots which are not contacted with any liquid medicine into slices, soaking the slices in the liquid medicine for 10s, taking out and airing the slices, inoculating 30 chilo suppressalis larvae into each treatment, repeating each treatment for 3 times, and treating with clear water as a control. The death of chilo suppressalis was checked after 72h for each treatment repetition. Calculating mortality and correcting mortality, solving a regression equation of virulence and calculating LC 50 。
Virulence index (TT) = standard medicament LC 50 Test agent LC 50 ×100。
Theoretical virulence index (TTI) = standard agent virulence index x the percentage of standard agent in the mixed formulation + test agent virulence index x the percentage of test agent in the mixed formulation.
Actual virulence index (ATT) = standard single dose LC50 value/LC 50 value of mix x 100.
Co-virulence coefficient (CTC) = measured virulence index/theoretical virulence index × 100.
Grading co-toxicity coefficients: the synergistic effect of the medicine mixture is evaluated by adopting a Sun Yunpei co-toxicity coefficient (CTC) method, and when the co-toxicity coefficient (CTC) is more than or equal to 120, the composition shows the synergistic effect; when CTC is less than or equal to 80, the composition shows antagonism; when 80 < CTC < 120, the composition exhibits additive effects.
TABLE 1
| Reagent for testing | Proportioning | Regression equation of virulence | LC 50 (μg/mL) | CTC |
| Cyclopropylfipronil (A) | - | y＝1.53x+4.79 | 1.38 | - |
| Bacillus thuringiensis (B) | - | y＝1.68x+4.34 | 2.48 | - |
| A：B | 1：50 | y＝1.39x+4.50 | 2.29 | 106.60 |
| A：B | 1：20 | y＝1.52x+4.60 | 1.84 | 129.62 |
| A：B | 1：1 | y＝1.51x+4.69 | 1.61 | 110.14 |
| A：B | 2：3 | y＝1.60x+4.83 | 1.29 | 145.77 |
| A：B | 3：5 | y＝1.52x+4.81 | 1.34 | 142.92 |
| A：B | 4：3 | y＝1.78x+4.63 | 1.62 | 105.26 |
| A：B | 5：4 | y＝1.94x+5.11 | 0.87 | 197.08 |
| A：B | 5：16 | y＝2.00x+5.00 | 1.01 | 188.46 |
| A：B | 15：4 | y＝1.77x+4.90 | 1.14 | 133.49 |
| A：B | 20：1 | y＝1.61x+4.77 | 1.4 | 100.81 |
| A：B | 50：1 | y＝1.63x+4.80 | 1.33 | 104.69 |
Table 1 shows the results of measuring the indoor bioactivity of pesticide compositions containing cyflumetofen and bacillus thuringiensis to chilo suppressalis, and as can be seen from table 1, the mass ratio of cyflumetofen to bacillus thuringiensis is (1-50): the co-toxicity coefficient of the composition of the cyflumetofen and the bacillus thuringiensis between 50 and 1 to the indoor biological activity of the rice stem borers is more than 100, and the composition has activity to the rice stem borers. Wherein the mass ratio of the cyflumetofen to the bacillus thuringiensis is 5: the activity to the rice stem borers is the best when the number of the active ingredients is 4, the co-toxicity coefficient is 197.08, and the obvious synergistic effect is shown. Therefore, the pesticide composition containing the cyflumetofen and the bacillus thuringiensis can prevent and treat the rice stem borers.
(2) The indoor bioactivity of the pesticide composition containing cyhalothrin and bacillus thuringiensis on phyllotreta striolata is measured:
test subjects: phyllotreta striolata. The test method comprises the following steps: by adopting a leaf soaking method, refer to Wangjinshan (2007) and 'test criteria for measuring biological activity in pesticide rooms' (NY/T1154.6-2006). Sowing the flowering cabbage seeds in a greenhouse, taking the flowering cabbage leaves which are consistent in size and free of insect pests for standby when 4-5 true leaves grow, and repeating one leaf for each time until the insect test is performed. During the test, the leaves are completely immersed in the liquid medicine with different concentrations for 5s, the liquid medicine on the surfaces of the leaves is taken out and dried, and the liquid medicine is placed on filter paper in a disposable culture dish with the diameter of 9cm (a piece of sterilized filter paper with the diameter of 7cm is placed in the culture dish, and 0.6mL of sterile water is added into each piece of filter paper to completely wet the filter paper). Adding 20 heads of CO in each repetition 2 The adult phyllotreta striolata is anesthetized, the upper cover of the culture dish is immediately covered, and the culture dish is stabilized by a rubber band to prevent the phyllotreta striolata from escaping. Using distilled water asBlank control, 3 replicates per treatment setup. And (3) placing the test insects in an artificial climate incubator with the temperature of 25 +/-1 ℃, the humidity of 75% and the L: D =14, observing and recording the death number of the test insects and the vegetable leaf feeding condition 24h and 48h after treatment.
Virulence indices were calculated according to the grandsinope (1960) method and the relative virulence between the test and standard agents was compared. Taking a single dose of the mixture as a standard medicament (generally, the lower LC50 is selected), the following calculation is carried out:
virulence index (TT) = Standard agent LC 50 Test agent LC 50 ×100；
Theoretical virulence index (TTI) = standard agent virulence index x the percentage of standard agent in the mixed formulation + test agent virulence index x the percentage of test agent in the mixed formulation;
actual virulence index (ATT) = LC50 value of standard single dose/LC 50 value of mix x 100;
co-virulence coefficient (CTC) = measured virulence index/theoretical virulence index x 100;
grading co-toxicity coefficients: when the co-toxicity coefficient (CTC) is more than or equal to 120, the composition shows a synergistic effect; when CTC is less than or equal to 80, the composition shows antagonism; when 80 < CTC < 120, the composition exhibits additive effects.
TABLE 2
| Reagent for testing | Proportioning | Regression equation of virulence | LC50(μg/mL) | CTC |
| Cyclopropanefluben amine (A) | - | y＝1.46x+2.74 | 35.4 | - |
| Bacillus thuringiensis (B) | - | y＝1.30x+2.67 | 62.1 | - |
| A：B | 1：50 | y＝1.44x+2.82 | 33 | 108.20 |
| A：B | 1：20 | y＝1.30x+3.11 | 28.1 | 128.75 |
| A：B | 1：1 | y＝1.28x+3.27 | 22.5 | 200.42 |
| A：B | 2：3 | y＝1.13x+3.38 | 27.5 | 155.46 |
| A：B | 3：5 | y＝1.21x+3.37 | 22.4 | 187.93 |
| A：B | 4：3 | y＝1.35x+2.98 | 31 | 151.26 |
| A：B | 5：4 | y＝1.39x+3.01 | 26.9 | 173.33 |
| A：B | 5：16 | y＝1.40x+3.17 | 20.3 | 208.44 |
| A：B | 15：4 | y＝1.55x+2.66 | 32.7 | 163.94 |
| A：B | 20：1 | y＝1.45x+2.60 | 45.5 | 131.52 |
| A：B | 50：1 | y＝1.32x+2.85 | 42.3 | 144.63 |
Table 2 shows the results of the measurement of the indoor bioactivity of the pesticide composition containing cyhalothrin and bacillus thuringiensis on phyllotreta striolata, and it can be seen from table 2 that the mass ratio of cyhalothrin to bacillus thuringiensis is (1-50): when the composition is used in a range of (50-1), the co-toxicity coefficient is more than 100, which shows that the pesticide composition has better complementary and synergistic effects on phyllotreta striolata, especially when the mass ratio of the cyhalothrin to the bacillus thuringiensis is 5:16, the synergistic effect is most obvious, the co-toxicity coefficient is 208.44, and therefore the pesticide composition containing the cyflumetofen and the bacillus thuringiensis can prevent and treat the flea beetle. 2. And (3) field efficacy test:
(1) Test subjects: rice stem borer;
reagent to be tested: the pesticide compositions provided in examples 1 to 9 and comparative examples 1 to 2 were sprayed with equal amounts of clear water as a blank control;
the test method comprises the following steps: spraying leaf surface with electric knapsack sprayer, wherein each agent treatment is repeated in four regions, and each region has an area of 20m 2 ；
Investigation of the number of dead centers: the test was conducted on days 10 and 20 after the spraying, and a parallel skip sampling method was used, in which 5-point sampling was conducted per area, 5 clusters were examined per point, and 25 clusters of rice were examined per area. Investigating and counting the heart-drying rate, and calculating the prevention and treatment effect;
the drug effect calculation method comprises the following steps: the withered heart rate (%) = the number of dead heart plants \ the total number of investigated plants x 100;
control effect (%) = (blank control area blank heart rate-medicament treatment area blank heart rate) \ blank control area blank heart rate × 100.
TABLE 3
Table 3 shows the test results of the field efficacy test of the pesticide composition on rice stem borer, and it can be seen from table 3 that, at day 10 after spraying, the control effects of the pesticide compositions provided in examples 1 to 9 on rice stem borer are all above 85%, and the death rate is low, and under the condition of reducing the application amount, the pesticide composition (compound preparation) simultaneously containing cyhalodiamide and bacillus thuringiensis and the pesticide composition (compound preparation) simultaneously containing bromofenofenamide and bacillus thuringiensis are both superior to the pesticide composition only containing cyhalodiamide or the pesticide composition only containing bacillus thuringiensis (single agent), which indicates that cyhalodiamide and bacillus thuringiensis are used in a compound manner, and the cyhalofenamide and bacillus thuringiensis are used in a compound manner, and both have significant synergistic effects. In addition, through long-term observation, no obvious difference in physiological indexes such as leaf color, plant height and the like of rice is found in each example in the test process, and the pesticide composition provided by the embodiment is safe to rice.
(2) Test subjects: phyllotreta striolata;
reagent to be tested: the pesticide compositions provided in examples 1 to 9 and comparative examples 1 to 2 were sprayed with equal amounts of clear water as a blank control;
the test method comprises the following steps: the test field is used for planting flowering cabbage throughout the year, and the yellow flea beetles are seriously damaged during the test. The land in the test area is leveled to form a ridge, the irrigation and drainage are convenient, and the sandy soil is good. Selecting a test site 600m 2 It is divided into 4 blocks of 40 regions each having an area of about 15m 2 . The experiment was set up with 10 treatments, 4 replicates each, arranged in random blocks. The application is started when the number of the phyllotreta striolata imagoes harms reaches 2-4 per plant, 45L of water is used per mu, a knapsack electric sprayer is adopted for spraying the leaves, the application frequency is 1 time, and any pesticide for preventing and treating other plant diseases and insect pests is not applied in the test period.
The investigation method comprises the following steps: each area is sampled according to a five-point sampling method, and each point is randomly selected to be 0.36m 2 The number of live adults was investigated. The population number before application and the number of live insects on days 1 and 7 after application were investigated, and the results are shown in the following table4, respectively.
The efficacy calculation method comprises the following steps: entry decline rate (%) = (number of entry before application-number of entry after application) \ number of entry before application × 100;
control effect (%) =1- (CK) 0 ×PT 1 )\(CK 1 ×PT 0 )×100；
Wherein PT 0 The number of worm openings before the pesticide is applied to the pesticide treatment area; PT 1 The number of insect population CK after the application of the medicament in the medicament treatment area 0 The number of insect population before application is CK 1 The number of worm mouths after drug application is a blank control area.
TABLE 4
Table 4 shows the test results of the field efficacy test of the pesticide composition on phyllotreta striolata, and it can be seen from table 4 that, under the condition of reducing the dosage, the control effect of the pesticide composition (compounded preparation) containing both cyhalothrin and bacillus thuringiensis and the pesticide composition (compounded preparation) containing both the bromofenoxanil and the bacillus thuringiensis is obviously higher than that of the pesticide composition (single preparation) containing only cyhalothrin or the pesticide composition (single preparation) containing only bacillus thuringiensis on the 1 st and the 7 th day after the spraying, which indicates that the cyhalothrin and the bacillus thuringiensis are compounded for use, and the bromofenoxanil and the bacillus thuringiensis are compounded for use, so that the synergistic effect is obvious. In addition, through long-term observation, no obvious difference in physiological indexes such as the leaf of the cabbage heart is found in each example in the test process, and the safety of the pesticide composition preparation provided by the embodiment of the application to the cabbage heart is proved.
Therefore, the pesticide composition provided by the embodiment of the application has the advantages of small unit dosage, good quick-acting property, long lasting period and the like under the synergistic effect of the cyhalothrin or the bromoxynil diacyl and the bacillus thuringiensis, so that the pesticide composition has great application potential.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A pesticide composition is characterized by comprising an effective component and auxiliary components acceptable in pesticides, wherein the effective component contains a m-diamide pesticide and bacillus thuringiensis, 50000 IU/mg of raw pesticide of the bacillus thuringiensis is set as 100% of raw pesticide, and the mass ratio of the m-diamide pesticide to the bacillus thuringiensis is (1-50): (50-1).
2. The pesticide composition as claimed in claim 1, wherein the mass ratio of the m-diamide pesticide to the bacillus thuringiensis is (1-20): (20-1).
3. The pesticide composition of claim 1, wherein the m-diamide pesticide comprises at least one of cyflumetofen and brobendiamide.
4. The pesticidal composition according to any one of claims 1 to 3, wherein the weight of the isophthalamide insecticide is 1 to 50% of the total weight of the pesticidal composition and the weight of the Bacillus thuringiensis is 1 to 50% of the total weight of the pesticidal composition, based on 100% of the total weight of the pesticidal composition.
5. The pesticidal composition according to any one of claims 1 to 3, wherein the formulation of the pesticidal composition comprises any one of water dispersible granules, a suspending agent, and wettable powder; and/or
The auxiliary components comprise at least one of a dispersant, a wetting agent, a disintegrating agent, an antifreezing agent, a thickening agent, a defoaming agent and a filler.
6. The pesticide composition as set forth in claim 5, wherein the formulation of the pesticide composition is wettable powder, and the wettable powder comprises the following components in percentage by weight:
7. the pesticide composition as claimed in claim 5, wherein the pesticide composition is in the form of water dispersible granules, and the water dispersible granules comprise the following components in percentage by weight:
8. the pesticide composition as claimed in claim 5, wherein the pesticide composition is in the form of a suspending agent, and the suspending agent comprises the following components in percentage by weight:
9. use of a pesticidal composition according to any one of claims 1 to 8 for controlling agricultural pests.
10. Use according to claim 9 for controlling agricultural pests, wherein the pests comprise at least one of hemiptera, lepidoptera, coleoptera.
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