Ant bait used in tussah garden and preparation method thereof

Abstract

The invention belongs to the technical field of veterinary drugs, and relates to an ant bait used in a tussah garden and a preparation method thereof. The ant bait is prepared from the following raw materials in parts by mass: 0.01 to 0.1 part of insecticide, 30 parts of attractant, 20 to 24 parts of adhesive, 0.6 to 1.2 parts of starch, 0.1 part of preservative, 43.6 to 48.29 parts of base material and 1 part of corn oil. The prepared ant bait is good in attraction effect, the insecticide in the bait is firmly combined with other components, and the influence on the tussah garden environment is relieved while the pesticide effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of veterinary drugs and relates to an ant bait used in oak orchards and a preparation method thereof. Background Art

[0002] Tussah silkworms are domesticated wild silkworms that are released in wild tussah orchards. It takes nearly two months for them to hatch from eggs into larvae, molt four times, and spin silk cocoons. During this period, tussah silkworms are often attacked by various enemies. In addition to rodents and birds, various predatory insect pests in tussah orchards are the main factors affecting the stable development of the tussah silk industry. Among them, the silkworm-eating ants in tussah orchards bite and feed on tussah silkworms, and are one of the main pests of tussah silkworms. There are many types of ants that harm silkworms, mainly 9 species: yellow mound ants [Lasiusflavus(Fabricius)], black brown grass ants (Lasiusniger), reddish brown forest ants (Formica rufa), blood red forest ants (Formicasanguinea), silky forest ants (Formica fusca), Japanese bow-backed ants (Camponotusjaponicus), wrinkled red ants (Myrmicaruginodis), small yellow house ants (Pharaoh ants) (Monomoriumpharaonis L.), and black grass ants (LasiusfuliginosusLatr.); they are widely distributed, and have caused damage in major production areas such as Liaoning, Jilin, Heilongjiang, Hebei, Shandong, Henan and Inner Mongolia, seriously affecting tussah silkworm production and the efficient utilization of tussah orchard resources. There are many kinds of ants that harm silkworms. During the period of stocking tussah silkworms, the use of control agents to control ants that harm silkworms in tussah gardens is an indispensable measure for protecting tussah silkworms. Chemical agents have always been used to control ants that harm silkworms. In the early days, 666 powder was used for killing, which had good control effects, but the tussah silkworms were severely poisoned and chlorine preparations were not easy to decompose and seriously polluted the environment. Later, it was improved to spray powders with organophosphorus insecticides such as phoxim, fenitrothion, and phosmet on the ground for control, or 15 days before stocking tussah silkworms, 2kg of 40% oxydemeton-methyl emulsifiable concentrate and 3kg of water were used for ultra-low volume spraying on the ground and tussah trees for control, and 2-3 days before stocking tussah silkworms, 500-1000 times of 25% phosmet emulsifiable concentrate was used for spraying on tussah trees where ants were active. At present, the general method of prevention and control is to spread 1% phoxim powder. The specific method of application is to use a duster or a gauze bag to spread the medicine while digging ant holes before releasing the tussah silkworms. This method can effectively control the damage caused by ants that harm silkworms, but there are the following problems: the surface of phoxim powder changes color (photolysis) after exposure to the sun and is easily ineffective, resulting in a short effective period of a single application; it is easily washed away by rainwater; multiple applications are required, which can easily cause environmental pollution in the tussah garden and easily generate dust, which poses a risk of pesticide poisoning to those who apply the medicine.

[0003] At present, physical control, biological control, chemical control and other methods are used to control harmful ants at home and abroad. Among them, chemical control is an important control measure to kill harmful ants, and bait is currently mainly used for control. The content of chemical pesticides in baits is low, and the amount used in use is less than that of contact insecticide powders. In addition, the agent has strong targeting, is safe for most non-target organisms, and is highly environmentally friendly, which can well overcome the shortcomings of powders; however, the current bait has a general luring effect, and the insecticide in the bait is generally not firmly combined with other components, which will have a certain impact on the oak garden environment. Summary of the invention

[0004] In view of the above technical problems, the present invention proposes an ant bait for use in oak orchards and a preparation method thereof. The ant bait prepared by the present invention has a good luring effect, and the insecticide in the bait is firmly combined with other components, which reduces the impact on the oak orchard environment while ensuring the efficacy.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] An ant bait for use in oak gardens comprises the following raw materials in parts by mass: 0.01 to 0.1 parts of insecticide, 30 parts of attractant, 20 to 24 parts of adhesive, 0.6 to 1.2 parts of starch, 0.1 part of preservative, 43.6 to 48.29 parts of base material and 1 part of corn oil.

[0007] Preferably, the ingredients include 0.02 parts of insecticide, 30 parts of attractant, 22 parts of adhesive, 0.8 parts of starch, 0.1 parts of preservative, 46.08 parts of base material and 1 part of corn oil.

[0008] Preferably, the ingredients include 0.02 parts of insecticide, 30 parts of attractant, 24 parts of adhesive, 1 part of starch slurry, 0.1 parts of preservative, 43.88 parts of base material and 1 part of corn oil.

[0009] Preferably, 0.1 parts of insecticide, 30 parts of attractant, 22 parts of adhesive, 0.8 parts of starch slurry, 0.1 parts of preservative, 46 parts of base material and 1 part of corn oil.

[0010] Preferably, 0.1 parts of insecticide, 30 parts of attractant, 24 parts of adhesive, 1 part of starch slurry, 0.1 parts of preservative, 43.8 parts of base material and 1 part of corn oil.

[0011] Furthermore, the insecticide is one of dinotefuran, fipronil, chlorpyrifos, spinosad, and spinetoram.

[0012] Furthermore, the attractant is a combination of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener.

[0013] Furthermore, the mass ratio of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener is 3-5:1-2:1-3:2-4.

[0014] Furthermore, the sweetener is one of maltose, brown sugar or sucrose.

[0015] Furthermore, the adhesive is polyvinyl pyrrolidone (PVP) and wheat flour.

[0016] Furthermore, the mass ratio of polyvinyl pyrrolidone (PVP) to wheat flour is 1-3:7-9.

[0017] Furthermore, the starch is corn starch.

[0018] Furthermore, the preservative is potassium sorbate.

[0019] Furthermore, the substrate is corn flour.

[0020] A method for preparing ant bait for use in oak orchards, comprising the following steps:

[0021] (1) dissolving the insecticide in an appropriate amount of an organic solvent and mixing with an appropriate amount of a substrate, and then drying in a fume hood to prepare a mother powder containing 5 wt % of the insecticide;

[0022] (2) weighing mother powder, wheat flour, polyvinyl pyrrolidone (PVP), and other base materials and mixing them uniformly with a high-speed grinder to obtain a mixture 1;

[0023] (3) adding an attractant to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0024] (4) first dissolving the preservative in an appropriate amount of cold water, then adding corn starch and stirring evenly, and then pouring into boiling water to prepare a 10 wt% starch slurry;

[0025] (5) slowly adding the 10 wt% starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, and mixing them into a mass to obtain a massed bait;

[0026] (6) adding corn oil to the agglomerated bait in step (5) and mixing well to obtain a coarse bait;

[0027] (7) drying the coarse bait material of step (6) to make the moisture content of the material less than 10%, and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0028] (8) The dried bait is granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules are sieved through a 30-mesh screen to remove fine particles to obtain a bait.

[0029] Furthermore, the organic solvent is one of xylene, acetone or methanol.

[0030] Furthermore, in step (7), the drying conditions are: temperature 60° C., time 20 min to 40 min.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0032] The bait prepared by the invention has a good luring effect on ants that harm silkworms in oak gardens, wherein the attractant is of vital importance and can efficiently attract worker ants to eat, carry the bait back to the nest, and then kill the entire nest of ants that harm silkworms; it is more labor-saving and labor-saving than the traditional method for preventing and controlling ants that harm silkworms in oak gardens; due to the presence of a specific adhesive, the insecticide in the bait is firmly combined with other components to avoid the loss of effective ingredients, thereby reducing the impact on the oak garden environment while ensuring the efficacy of the drug. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] An ant bait for use in oak gardens comprises the following raw materials in parts by mass: 0.01 to 0.1 parts of insecticide, 30 parts of attractant, 20 to 24 parts of adhesive, 0.6 to 1.2 parts of corn starch, 0.1 part of preservative potassium sorbate, 43.6 to 48.29 parts of base material corn flour, and 1 part of corn oil.

[0035] Furthermore, the insecticide is one of dinotefuran, fipronil, chlorpyrifos, spinosad, and spinetoram.

[0036] Furthermore, the attractant is a combination of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener.

[0037] Furthermore, the mass ratio of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener is 3-5:1-2:1-3:2-4.

[0038] Furthermore, the sweetener is one of maltose, brown sugar or sucrose.

[0039] Furthermore, the adhesive is polyvinyl pyrrolidone (PVP) and wheat flour.

[0040] Furthermore, the mass ratio of polyvinyl pyrrolidone (PVP) to wheat flour is 1-3:7-9.

[0041] A method for preparing ant bait for use in oak orchards, comprising the following steps:

[0042] (1) dissolving the insecticide in an appropriate amount of an organic solvent and mixing with an appropriate amount of a substrate, and then drying in a fume hood to prepare a mother powder containing 5 wt % of the insecticide;

[0043] (2) weighing mother powder, wheat flour, polyvinyl pyrrolidone (PVP), and other base materials and mixing them uniformly with a high-speed grinder to obtain a mixture 1;

[0044] (3) adding an attractant to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0045] (4) first dissolving the preservative in an appropriate amount of cold water, then adding corn starch and stirring evenly, and then pouring into boiling water to prepare a 10 wt% starch slurry;

[0046] (5) slowly adding the 10 wt% starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, and mixing them into a mass to obtain a massed bait;

[0047] (6) adding corn oil to the agglomerated bait in step (5) and mixing well to obtain a coarse bait;

[0048] (7) drying the coarse bait material of step (6) at a temperature of 60° C. for 20 to 40 minutes, so that the moisture content of the material is less than 10%, and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0049] (8) The dried bait is granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules are sieved through a 30-mesh screen to remove fine particles to obtain a bait.

[0050] Preferably, the organic solvent is one of xylene, acetone or methanol.

[0051] The bait effect was evaluated by the control effect of silkworm-eating ants in the oak garden. In the oak garden with serious ant damage, two application methods were adopted: uniform circular spreading on the surface of the ant nest (hereinafter referred to as spreading) and spot spreading near the entrance of the ant nest (hereinafter referred to as spot spreading). The application amount for each nest was 20g. The silkworm-eating ants were the common yellow mound ants. The bait agent was used to evaluate the control effect of bait luring. The bait method was used. The number of active worker ants on the surface of the ant nest was investigated by the fresh grape pulp luring method before and 1d, 4d, 7d, and 10d after the application of the agent, and the control effect of the agent on the worker ants was counted.

[0052] Calculation formula: control effect of attraction (%) = (number of worker ants before application - number of worker ants after application) / number of worker ants before application × 100.

[0053] Adsorption effect: Different combinations of adhesives were used to prepare baits with the same insecticide content. The insecticide content in the bait was determined by high performance liquid chromatography under the same conditions. The insecticide detection amount was used to evaluate the adsorption and fixation effect of other components of the bait on the insecticide. The insecticide in the bait was extracted by organic solvent extraction. The specific method was to weigh 4.0g (accurate to 0.0002g) of the bait to be tested and put it in a 250mL conical flask, add 200ml of acetonitrile and shake for 30min, then centrifuge at 5000r / min for 20min, evaporate the supernatant on a rotary evaporator until it was nearly dry, make the volume to 50ml with acetonitrile, degas by ultrasonication, and filter through a 0.45μm filter membrane before testing.

[0054] Calculation formula: mass fraction of insecticide in bait X (%) = (A2 × m1 × p) / A1 × m2. Where A1 is the average value of the peak area of ​​insecticide in the standard solution; A2 is the average value of the peak area of ​​insecticide in the bait solution; m1 is the mass of the standard, in grams (g); m2 is the mass of the bait, in grams (g); P is the mass fraction of the insecticide standard; the difference between the results of two parallel determinations should not be greater than 0.03%, and the arithmetic mean is taken as the determination result.

[0055] Example 1.

[0056] Preparation of an ant bait for use in oak gardens:

[0057] (1) 5.1 g of 98% spinetoram technical was dissolved in 30 ml of methanol and mixed with 94.9 g of base material, and then dried in a fume hood to prepare a master powder containing 5 wt% spinetoram;

[0058] (2) Component Proportions Weigh 4 g of mother powder, 180 g of wheat flour, 40 g of polyvinyl pyrrolidone (PVP), and 457 g of base material and mix them evenly with a high-speed grinder to obtain a mixture 1;

[0059] (3) adding an attractant (120 g egg yolk powder, 30 g tussah pupa powder, 60 g yeast extract powder, and 90 g brown sugar) to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0060] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0061] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0062] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0063] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0064] (8) The dried bait was granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.02 wt% spinetoram bait.

[0065] Results: The 0.02wt% spinetoram bait prepared in Example 1 was used for luring and control test. The results are shown in Table 1. The control effect of the bait on silkworm ants increases with the increase of the application time, and the effect can reach more than 65% 4 days after the application, and more than 82% 7 days after the application. After the bait is spread, it is convenient for worker ants to carry it back to the nest, so the control effect is higher than the control effect of the bait. The prepared 0.02wt% spinetoram bait was tested, and the detection amount of spinetoram in the bait was only 0.0071%, which was much lower than the actual content, indicating that other components in the bait had a good adsorption and fixation effect on the insecticide.

[0066] Table 1 Control effect of 0.02wt% spinetoram bait on yellow ant in oak garden

[0067]

[0068] Example 2.

[0069] Preparation of an ant bait for use in oak gardens:

[0070] (1) 5.15 g of 97% fipronil technical was dissolved in 30 ml of acetone and mixed with 94.85 g of substrate, and then dried in a fume hood to prepare a master powder containing 5 wt% fipronil;

[0071] (2) Weigh 20 g of mother powder, 160 g of wheat flour, 60 g of polyvinyl pyrrolidone (PVP), and 441 g of base material according to the component ratio and mix them with a high-speed grinder to obtain a mixture 1;

[0072] (3) adding an attractant (150 g egg yolk powder, 60 g tussah pupa powder, 30 g yeast extract powder, and 60 g maltose) to the mixture of step (2) and continuing to mix well to obtain a mixture 2;

[0073] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0074] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0075] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0076] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0077] (8) The dried bait was granulated using a 16-mesh screen of an oscillating granulator, and the obtained granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.1 wt% fipronil bait.

[0078] The 0.1wt% fipronil bait prepared in Example 2 was subjected to a luring control test, and the results are shown in Table 2. Similarly, the control effect of the bait on silkworm-eating ants increases with the increase of the application treatment time, and can reach more than 89% 10 days after the application. After the bait is spread, it is convenient for worker ants to carry it back to the nest, so the control effect is higher than the control effect of the bait point. The prepared 0.1wt% fipronil bait was tested, and the amount of fipronil detected in the bait was only 0.046%, which is much lower than the actual content, which also shows that other components in the bait have a good adsorption and fixation effect on the insecticide.

[0079] Table 2 Control effect of 0.1wt% fipronil bait on yellow ant in oak garden

[0080]

[0081] Example 3.

[0082] Preparation of an ant bait for use in oak gardens:

[0083] (1) 5.1 g of 98% dinotefuran technical was dissolved in 100 ml of acetone and mixed with 94.9 g of substrate, and then dried in a fume hood to prepare a master powder containing 5 wt% dinotefuran;

[0084] (2) Weigh 20 g of mother powder, 200 g of wheat flour, 40 g of polyvinyl pyrrolidone (PVP), and 419 g of base material according to the component ratio and mix them evenly with a high-speed grinder to obtain a mixture 1;

[0085] (3) adding an attractant (90 g of egg yolk powder, 60 g of tussah pupa powder, 60 g of yeast extract powder, and 90 g of sucrose) to the mixture of step (2) and continuing to mix well to obtain a mixture 2;

[0086] (4) Dissolve 1 g of potassium sorbate in 15 g of cold water, add 10 g of corn starch, stir evenly, and add 75 g of boiling water to prepare a 10 wt% starch slurry;

[0087] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0088] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0089] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0090] (8) The dried bait was granulated using a 16-mesh screen of an oscillating granulator, and the obtained granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.1% wt dinotefuran bait.

[0091] The 0.1wt% dinotefuran bait prepared in Example 3 was subjected to a luring control test, and the results are shown in Table 3. Similarly, the control effect of the bait on silkworm-eating ants increases with the increase of the application time, and can reach more than 85% 10 days after the application. After the bait is spread, it is convenient for worker ants to carry it back to the nest, so the control effect is higher than the control effect of the bait point. The prepared 0.1wt% dinotefuran bait was tested, and the amount of dinotefuran detected in the bait was only 0.036%, which was much lower than the actual content, which also showed that other components in the bait had a good adsorption and fixation effect on the insecticide.

[0092] Table 3 Control effect of 0.1wt% dinotefuran bait on yellow ant in oak garden

[0093]

[0094] Comparative example 1.

[0095] Preparation of an ant bait for use in oak gardens:

[0096] (1) 5.1 g of 98% spinetoram technical was dissolved in 30 ml of methanol and mixed with 94.9 g of base material, and then dried in a fume hood to prepare a master powder containing 5 wt% spinetoram;

[0097] (2) Weigh 4 g of mother powder, 180 g of wheat flour, 40 g of polyvinyl pyrrolidone (PVP), and 457 g of base material according to the component ratio and mix them with a high-speed grinder to obtain a mixture 1;

[0098] (3) adding an attractant (60 g egg yolk powder, 90 g tussah pupa powder, 120 g yeast extract powder, and 30 g brown sugar) to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0099] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0100] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0101] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0102] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0103] (8) The dried bait was granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.02 wt% spinetoram bait.

[0104] The 0.02wt% spinetoram bait prepared in Comparative Example 1 was subjected to an luring and control test. The results are shown in Table 4. Compared with Example 1, although the protective effect of the bait on silkworm-eating ants also increased with the increase of the application time, its luring and control effect was significantly lower than that of Example 1 under the same conditions, indicating that the attractant ratio is not within the appropriate range, which significantly reduces the bait's effect of attracting and feeding on harmful silkworm ants.

[0105] Table 4 Control effect of 0.02wt% spinetoram bait on yellow ant in oak garden

[0106]

[0107] Comparative example 2.

[0108] Preparation of an ant bait for use in oak gardens:

[0109] (1) 5.1 g of 98% spinetoram technical was dissolved in 30 ml of methanol and mixed with 94.9 g of base material, and then dried in a fume hood to prepare a master powder containing 5 wt% spinetoram;

[0110] (2) Weigh 4 g of mother powder, 180 g of wheat flour, 40 g of polyvinyl pyrrolidone (PVP), and 457 g of base material according to the component ratio and mix them with a high-speed grinder to obtain a mixture 1;

[0111] (3) adding an attractant (90 g egg yolk powder, 60 g tussah pupa powder, 75 g yeast extract powder, and 75 g brown sugar) to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0112] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0113] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0114] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0115] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0116] (8) The dried bait was granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.02 wt% spinetoram bait.

[0117] The 0.02wt% spinetoram bait prepared in Comparative Example 2 was subjected to an luring and control test. The results are shown in Table 5. Similarly, compared with Example 1, the luring and control effect of the bait under the same conditions was significantly lower than that of Example 1, indicating that the attractant ratio is not within the appropriate range, which significantly reduces the bait's effect on attracting and feeding harmful silkworm ants.

[0118] Table 5 Control effect of 0.02wt% ethyl spinosad bait on yellow ant in oak garden

[0119]

[0120]

[0121] Comparative example 3.

[0122] Preparation of an ant bait for use in oak gardens:

[0123] (1) 5.1 g of 98% spinetoram technical was dissolved in 30 ml of methanol and mixed with 94.9 g of base material, and then dried in a fume hood to prepare a master powder containing 5 wt% spinetoram;

[0124] (2) 4 g of mother powder, 122.2 g of wheat flour, 97.8 g of polyvinyl pyrrolidone (PVP), and 457 g of base material were weighed and mixed in a high-speed grinder according to the component ratio to obtain a mixture 1;

[0125] (3) adding an attractant (120 g egg yolk powder, 30 g tussah pupa powder, 60 g yeast extract powder, and 90 g brown sugar) to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0126] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0127] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0128] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0129] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0130] (8) The dried bait was granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.02 wt% spinetoram bait.

[0131] The prepared 0.02wt% spinetoram bait was tested, and the detected amount of spinetoram in the bait was 0.0097%, which was lower than the actual content but significantly higher than the detected amount in Example 1, indicating that the binder ratio was not within the appropriate range and significantly weakened the adsorption and fixation effect of other components in the bait on the insecticide.

[0132] Comparative example 4.

[0133] Preparation of an ant bait for use in oak gardens:

[0134] (1) 5.1 g of 98% spinetoram technical was dissolved in 30 ml of methanol and mixed with 94.9 g of base material, and then dried in a fume hood to prepare a master powder containing 5 wt% spinetoram;

[0135] (2) Weigh 4 g of mother powder, 151.25 g of wheat flour, 68.75 g of polyvinyl pyrrolidone (PVP), and 457 g of base material according to the component ratio and mix them with a high-speed grinder to obtain a mixture 1;

[0136] (3) adding an attractant (120 g egg yolk powder, 30 g tussah pupa powder, 60 g yeast extract powder, and 90 g brown sugar) to the mixture of step (2) and continuing to mix to obtain a mixture 2;

[0137] (4) Dissolve 1 g of potassium sorbate in 12 g of cold water, add 8 g of corn starch, stir evenly, and add 60 g of boiling water to prepare a 10 wt% starch slurry;

[0138] (5) slowly adding the starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, mixing and agglomerating to obtain agglomerated bait;

[0139] (6) adding 10 g corn oil to the bait pellets prepared in step (5) and mixing well to obtain a coarse bait;

[0140] (7) drying the coarse bait material of step (6) at 60° C. to make the moisture content of the material less than 10% and the material can be lumped together by hand but can be loosened by hand, thereby obtaining dried bait;

[0141] (8) The dried bait was granulated using a swing-type granulator with a 16-mesh screen, and the resulting granules were passed through a 30-mesh screen to remove fine particles to obtain a 0.02 wt% spinetoram bait.

[0142] The prepared 0.02wt% spinetoram bait was tested. Similarly, the detected amount of spinetoram in the bait was 0.011%, which was also lower than the actual content but significantly higher than the detected amount in Example 1, indicating that the binder ratio was not within the appropriate range and significantly weakened the adsorption and fixation effect of other components in the bait on the insecticide.

Claims

1. An ant bait for use in oak orchards, characterized in that: The invention comprises the following raw materials in parts by weight: 0.01 to 0.1 parts of insecticide, 30 parts of attractant, 20 to 24 parts of adhesive, 0.6 to 1.2 parts of starch, 0.1 parts of preservative, 43.6 to 48.29 parts of base material and 1 part of corn oil.

2. The ant bait for use in oak orchards according to claim 1, characterized in that: The insecticide is one of dinotefuran, fipronil, chlorpyrifos, spinosad and spinetoram.

3. The ant bait for use in oak orchards according to claim 1, characterized in that: The attractant is a combination of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener.

4. The ant bait for use in oak orchards according to claim 3, characterized in that: The mass ratio of egg yolk powder, tussah pupa powder, yeast extract powder and sweetener is 3~5:1~2:1~3:2~4.

5. The ant bait for use in oak orchards according to claim 3, characterized in that: The sweetener is one of maltose, brown sugar or sucrose.

6. The ant bait for use in oak orchards according to claim 1, characterized in that: The adhesive is polyvinyl pyrrolidone and wheat flour, and the mass ratio of polyvinyl pyrrolidone to wheat flour is 1-3:7-9.

7. The ant bait for use in oak orchards according to claim 1, characterized in that: The starch is corn starch; the preservative is potassium sorbate; and the base material is corn flour.

8. A method for preparing ant bait for use in oak orchards, characterized in that: The steps include: (1) dissolving the insecticide in an appropriate amount of organic solvent and mixing with an appropriate amount of substrate, and then drying in a fume hood to prepare a master powder containing 5 wt% of the insecticide; (2) Weigh the mother powder, wheat flour, polyvinyl pyrrolidone, and other base materials and mix them evenly using a high-speed grinder to obtain a mixture 1; (3) adding an attractant to the mixture in step (2) and continuing to mix to obtain a mixture 2; (4) Dissolve the preservative in an appropriate amount of cold water, then add corn starch and stir evenly, then pour into boiling water to prepare a 10 wt% starch slurry; (5) slowly adding the 10 wt% starch slurry of step (4) and the mixture 2 of step (3) under stirring conditions, and mixing them into a mass to obtain a massed bait; (6) adding corn oil to the agglomerated bait in step (5) and mixing well to obtain a coarse bait; (7) Drying the coarse bait material in step (6) until the moisture content of the material is less than 10% and the material can be lumped together and loosened by hand, thereby obtaining dried bait; (8) The dried bait is granulated using a 16-mesh screen of an oscillating granulator, and the resulting granules are passed through a 30-mesh screen to remove fine particles to obtain an ant bait.

9. The method for preparing ant bait for use in oak orchards according to claim 8, characterized in that: The organic solvent is one of xylene, acetone or methanol.

10. The method for preparing ant bait for use in oak orchards according to claim 8, characterized in that: In step (7), the drying conditions are: temperature 60° C., time 20 min to 40 min.

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