CN104585245A - Compound molluscicide - Google Patents

Abstract

The invention relates to a compound molluscicide. The compound molluscicide is a two-component compound with emamectin benzoate and tea dead powder as active ingredients, and the active ingredients emamectin benzoate and tea dead powder The mass ratio is 1:10-10:1. The compound molluscicide of the present invention has remarkable control effect on apple snails.

Description

A compound molluscicide

technical field

The invention belongs to the technical field of pesticide application, and relates to a compound molluscicide, in particular to a molluscicide compounded with active ingredients emamectin benzoate and tea dry powder.

Background technique

At present, the control agents for apple snails in paddy fields mainly include chemical agents such as 50% spirulina wettable powder, 70% spirulina wettable powder, 6% Mida granules, 90% copper sulfate crystals, lime powder and boron magnesium. Stone powder and other natural molluscicides. In order to reduce the toxicity of chemical molluscicides to aquatic organisms such as mammals and fish, and to increase the molluscicidal effect and safety of molluscicides, active ingredients extracted from plants have been studied. The order of sexual strength is Phytaceae, Mimosaceae, Polygonaceae, Verbenaceae, Verbenaceae, Euphorbiaceae. The molluscicides of these plants or their extracts can be used as synergists of chemical molluscicides, so that they can increase the molluscicidal effect while reducing the amount of molluscicides, and eliminate or reduce the pollution and impact of molluscicides on the environment. Poisoning of poultry, animals and plants. But plant molluscicides have not been popularized and applied. The main problem is that the content of active ingredients in plants is not high, but the amount of use is too large and the cost is too high. Secondly, there are many influencing factors and the performance is unstable.

The relevant reports on the combined use of chemical or plant molluscicides to enhance the molluscicidal effect mainly focus on the compounding or mixing of niclosamide. Existing formulations include the compound of niclosamide and bromoacetamide, which has the effect of killing snail eggs in solution; the compound of phoxim and niclosamide has the effect of improving molluscicidal effect and reducing toxicity. It is known from existing information that no conventional insecticide compounded with biologically active plants has been applied to the control of apple snails.

Existing molluscicides are still mainly traditional chemical molluscicides. Foreign patents report emamectin benzoate as a control agent that can prevent and control harmful aquatic organisms; domestic conventional molluscicides have not yet been seen. Insecticides are used to control apple snails. Although many biological species with molluscicidal activity have been reported, relevant biological molluscicides have not been transformed into formal products.

Contents of the invention

The main purpose of the present invention is to provide a compound molluscicide that has a synergistic effect on apple snails and is less destructive to the environment. Polluted water quality, poor control effect, incomplete control, increasing drug resistance of apple snails, and increasing difficulty in control.

Technical scheme of the present invention is:

A compound molluscicide, characterized in that the mass ratio of active ingredients emamectin benzoate and tea dry powder in the molluscicide composition is 1:10-10:1.

Preferably, the mass ratio of emamectin benzoate to tea dry powder in the compound molluscicide is 2:8.

As a preference, the mass of the active ingredients emamectin benzoate and tea dry powder of the compound molluscicide accounts for 1-80% of the total mass of the molluscicide composition, and the rest are auxiliary components allowed to be used in pesticides .

Preferably, the auxiliary components allowed to be used in the pesticide are composed of one or more of solvents, co-solvents, emulsifiers, wetting agents, dispersants, thickeners, antifreeze agents, carriers and disintegrants.

As preferably, the solvent is esters or sulfones, the cosolvent is ketones or higher alcohols, the emulsifier, wetting agent, and dispersant are nonionic surfactants or anionic surfactants, and the enhancer The thickening agent is xanthan gum, gum arabic, magnesium aluminum silicate and polyvinyl alcohol, the antifreeze agent is polyhydric alcohol, the carrier is white carbon black, kaolin or diatomaceous earth, and the disintegrating agent is ammonium sulfate, sodium chloride or ammonium sulfate.

Preferably, the esters are sec-butyl acetate and ethyl acetate; the sulfones are dimethyl sulfoxide; the ketones are cyclohexanone and N-pyrrolidone; the higher alcohols are n-butanol; The surfactant is castor oil polyoxyethylene ether, nonylphenol polyoxyethylene ether, styrylphenyl polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene polyoxypropylene graft copolymer, tristyrylbenzene Calcium dodecylbenzenesulfonate and calcium dodecylbenzenesulfonate castor oil polyoxyethylene ether; anionic surfactants are calcium dodecylbenzenesulfonate, sodium lignosulfonate, sodium laurylsulfate, nonylphenol Polyoxyethylene ether phosphate and fatty alcohol polyoxyethylene ether phosphate ammonium salt; the polyhydric alcohol is ethylene glycol, glycerol and propylene glycol.

Preferably, the compound molluscicide is prepared as water emulsion, microemulsion, suspension, wettable powder or water dispersible granule.

In addition, the invention also discloses the use of the compound molluscicide mentioned above in controlling apple snails.

Compared with prior art, the beneficial effect of the present invention is:

1. The compound molluscicide of the present invention has obvious synergistic effect. It shows that compounding according to this formula can reduce the dosage and cost of controlling apple snails compared with using a single control agent.

2. Chaku powder, one of the active ingredients of the present invention, is the slag left after the wild camellia oil fruit is pressed. It is a by-product of processing, which does not pollute the environment, and is easy to obtain in large quantities with abundant sources. It also solves the problem of tea Blight as a processing by-product problem.

Detailed ways

The present invention describes its beneficial effect in detail with the following specific examples.

1. Determination of indoor toxicity test

1. Using different modes of action and different types of agents to measure the activity of apple snails, the test method was carried out by soaking the snails; a total of 14 kinds of agents were tested for their toxicity to apple snails, and two compounds with high activity on apple snails and environmental friendliness were screened out. According to the size of LC ₅₀ , the chemical medicaments were tea dry powder and emamectin benzoate. The LC ₅₀ of the two medicaments was 0.4611mg/L and 0.7355mg/L respectively, and the toxicity regression equation They are y=7.1746+6.4676x and y=5.1836+1.3762x respectively, and have high biological activity on apple snails.

2. The tea-cured powder and emamectin benzoate were screened with the tea-cured powder by interactive assay method, and the compound combinations with high biological activity on apple snails were screened out; each compound combination was obtained by indoor bioassay method Based on the LC ₅₀ value of a single agent, 9 concentration gradients and a blank control were set (see Table 1).

The test data were analyzed with DPS statistical analysis software, and the LC50 of each agent was calculated to evaluate the insecticidal activity of each agent. And calculate the co-toxicity coefficient (CTC value) of the mixture according to Sun Yunpei's method.

Measured toxicity index (ATI) = (standard drug LC50/test drug LC50) × 100.

Theoretical toxicity index (TTI) = toxicity index of agent A × percentage content of A in the mixture + toxicity index of agent B × percentage content of B in the mixture.

Co-toxicity coefficient (CTC) = [measured toxicity index (ATI) of mixture/theoretical toxicity index (TTI) of mixture]×100.

According to the classification standard of NY/T1154.13-2008 combined action of insecticides: co-toxicity coefficient (CTC) ≥ 120 means synergistic effect; co-toxicity coefficient (CTC) ≤ 80 means antagonism; 80 < co-toxicity coefficient (CTC) )<120 shows an additive effect.

Table 1 Indoor joint toxicity test of emamectin benzoate and tea dry powder on apple snails

Note: Emamectin benzoate is the abbreviation of emamectin benzoate.

The results of indoor toxicity test show that the mass ratio of emamectin emamectin benzoate and tea dry powder in the composition is in the range of 10:1-1:10, and the co-toxicity coefficients are all greater than 120, that is to say, the composition has the same biological activity on apple snails. Synergistic effect; especially when the mass ratio of emamectin benzoate and tea dry powder is 2:8, the co-toxicity coefficient is 262.91, and the synergistic effect is more obvious.

Two, pesticide preparation embodiment

Embodiment 1: 1% emamectin emamectin salt·chaku powder water emulsion

Embodiment 2: 10% emamectin emamectin salt·chaku powder water emulsion

Embodiment 3: 15% emamectin emamectin salt·chaku powder water emulsion

The preparation method of the water-emulsion described in the above 3 examples is: after fully dissolving the active ingredients emamectin emamectin benzoate and tea dry powder with a solvent and a co-solvent, put in an emulsifier, a dispersant, and a wetting agent and fully stir to form an oil phase ; Dissolve the antifreeze in water to form a water phase; slowly add the water phase to the oil phase and cut it with a high-speed shear to obtain a water emulsion.

Embodiment 4: 5% emamectin emamectin · tea dry powder microemulsion

Embodiment 5: 8% emamectin emamectin salt·chaku powder microemulsion

Embodiment 6: 16% emamectin emamectin salt·chaku powder microemulsion

The preparation method of the microemulsion described in the above 3 embodiments is: after fully dissolving the active ingredient emamectin emamectin and tea dry powder with a solvent and a cosolvent, put into an emulsifier, stir well to form an oil phase; add the antifreeze agent to the water The water phase is obtained; the water phase is slowly added to the oil phase, and a high-speed shearing machine is used for shearing to obtain a transparent microemulsion.

Embodiment 7: 20% emamectin emamectin salt·chaku powder suspension concentrate

Example 8: 30% emamectin emamectin salt·chaku powder suspension concentrate

Example 9: 50% emamectin emamectin salt·chaku powder suspension concentrate

The preparation method of the suspending agent described in the above three examples is as follows: after pulverizing the active ingredients emamectin emamectin salt and tea dry powder using a jet mill, put them into a stirring tank, and simultaneously put in a dispersant, a wetting agent, an antifreeze agent and water After fully stirring, the material is pumped into a sand mill for full grinding. After the grinding is completed, it is pumped into a high-speed shearing machine. After adding a thickener, it is sheared at a high speed. After the shearing is completed, the suspending agent is obtained.

Example 10: 50% emamectin benzoate·chaku powder wettable powder

Example 11: 60% emamectin emamectin · Chaku powder wettable powder

Example 12: 80% emamectin emamectin salt·chaku powder wettable powder

The preparation method of the wettable powder described in the above three examples is as follows: according to the formula ratio, the active ingredient and the auxiliary ingredients of the formulation are uniformly mixed, pulverized by a jet mill, and then mixed uniformly to obtain a wettable powder.

5. Preparation of water dispersible granules

Example 13: 25% emamectin emamectin salt·chaku powder water dispersible granule

Example 14: 50% emamectin emamectin salt·chaku powder water dispersible granule

Example 15: 70% emamectin emamectin salt·chaku powder water dispersible granule

The preparation method of the water-dispersible granules described in the above 3 examples is as follows: according to the formula ratio, after mixing the active ingredient and the auxiliary ingredient of the preparation uniformly, pulverize through a jet mill, and mix uniformly again, then, add a certain amount of water to dissolve the The mixture is kneaded, extruded and granulated, dried and sieved to obtain water-dispersible granules.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (8)

1. a composite molluscicide, is characterized in that: in described composite molluscicide, the mass ratio of active ingredient emamectin-benzoate and the withered powder of tea is 1:10-10:1.

2. composite molluscicide according to claim 1, is characterized in that: in described composite molluscicide, the mass ratio of active ingredient emamectin-benzoate and the withered powder of tea is: 2:8.

3. according to the arbitrary described composite molluscicide of claim 1 to 2, it is characterized in that: the quality of described composite molluscicide active ingredient emamectin-benzoate and the withered powder of tea accounts for the 1-80% killing spiral shell composition gross mass, all the other are the auxiliary element allowing in agricultural chemicals to use.

4. composite molluscicide according to claim 3, is characterized in that: allow the auxiliary element used to be made up of one or more in solvent, cosolvent, emulsifier, wetting agent, dispersant, thickener, antifreezing agent, carrier and disintegrant in described agricultural chemicals.

5. composite molluscicide according to claim 4, it is characterized in that: described solvent is ester class or sulfone class, described cosolvent is ketone or higher alcohol, described emulsifier, wetting agent, dispersant are non-ionic surface active agent or anion surfactant, described thickener is xanthans, gum Arabic, Magnesiumaluminumsilicate and polyvinyl alcohol, described antifreezing agent is polyalcohol, and described carrier is white carbon, kaolin or diatomite, and described disintegrant is ammonium sulfate, sodium chloride or ammonium sulfate.

6. composite molluscicide according to claim 5, is characterized in that: described ester class is sec-butyl acetate and ethyl acetate; Sulfone class is dimethyl sulfoxide (DMSO); Described ketone is cyclohexanone and N-pyrrolidones; Higher alcohol is n-butanol; Described non-ionic surface active agent is castor oil polyoxyethylene ether, polyoxyethylene nonylphenol ether, styryl phenyl polyoxyethylene poly-oxygen propylene aether, aliphatic alcohol polyethenoxy polyoxypropylene graft copolymer, tristyrylphenyl APEO and calcium dodecyl benzene sulfonate castor oil polyoxyethylene ether; Anion surfactant is calcium dodecyl benzene sulfonate, sodium lignin sulfonate lauryl sodium sulfate, thermally coupled distillation columns and aliphatic alcohol polyoxyvinethene phosphate ammonium salt; Described polyalcohol is ethylene glycol, glycerine and propane diols.

7. composite molluscicide according to claim 3, is characterized in that: described composite molluscicide can be prepared into aqueous emulsion, microemulsion, suspending agent, wetting powder or water dispersible granules.

8. the purposes in Pomacea canaliculata prevented and treated by composite molluscicide according to claim 3.