Long-acting slow-release bird-repelling composite essence granule and preparation method thereof

Abstract

The invention discloses a long-acting slow-release bird repelling composite essence granule and a preparation method thereof, and belongs to the technical field of agricultural chemical bird repelling prevention and control. The long-acting slow-release bird-repelling composite essence granule is prepared from the following raw materials in percentage by weight: 0.1-10% of a bird-repelling agent, 0.01-3% of a stabilizer, 0.1-45% of a slow-release carrier, 0.3-5% of a film-forming agent, 0.1-0.7% of warning dye and the balance of filler, and the bird-repelling agent is one or more of 3-hydroxy-4-methoxybenzaldehyde, patchoulene or peppermint oil. The long-acting slow-release bird-repelling composite essence granule disclosed by the invention is good in bird-repelling effect and long in time effect, can effectively reduce the feeding of birds to crop seeds or buds for a long time, and is harmless to the birds and the environment.

Description

Technical Field

[0001] The invention relates to a long-acting slow-release bird-repellent composite flavor granule and a preparation method thereof, belonging to the technical field of agricultural chemical bird-repellent control. Background Art

[0002] During the crop production process, birds have brought more and more problems to crop production. When the crops are just sown and sprouting, birds will dig up seeds and seedlings, harming crop sowing and causing low germination rates. When the crops are mature, birds will peck at the fruits of the crops, causing reduced crop yields and quality. Even bagged fruits will be harmed by long-billed birds such as gray magpies and crows.

[0003] Due to bird pecking, the emergence rate of crops sown in early spring, such as corn and peanuts in the northeast and early rice in the south, will drop by 2-10%. During the fruit ripening period, orchards lose 5-30% of their fruits every year, and the loss rate of some orchards is even as high as more than 50%. The loss of hybrid rice seed production and commercial rice due to bird damage is about 10%, and the loss of some damage is more than 30%. To prevent bird damage, most fruit farmers bag large fruits (ears) such as apples, pears, peaches, and grapes, or cover them with protective nets. However, smart birds can still get into damaged or unprotected protective nets and peck through the bags to cause damage. At present, the traditional means of bird repelling is to use loud noises or visual effects to scare birds away. For example, farmers use methods such as making scarecrows, beating gongs, hanging bottles and cans, and setting off firecrackers to repel birds. These bird repelling measures have invested a lot of manpower and material resources, but the effect is minimal. Although shooting with a shotgun or using pesticides to kill birds has a significant effect in repelling birds and is low cost, it violates the "Wildlife Protection Law of the People's Republic of China" and seriously pollutes the environment and destroys the ecological balance. Bird nets have no control effect on the activities of birds that exceed the height of the bird nets, and their bird repelling effect is also very limited. However, artificial trapping or using pesticides to repel birds will destroy the environment and ecological balance.

[0004] In recent years, agricultural chemical bird repellents have become increasingly popular among farmers for their convenience and low price. However, most of the bird repellents on the market are mainly composed of bird repellent compositions extracted from plant raw materials such as Sophora flavescens, Celastrus dahliae, Stemona radix, and Stellera chamaejasme, and bird repellent compositions prepared from agricultural chemical raw materials such as thiram, carbosulfan, anthraquinone, and ammonium aluminum sulfate. They either add pesticides, which are highly toxic and use poisoning to repel bird damage, or are expensive and require farmers to increase their agricultural investment. Moreover, their dosage forms are all aqueous, emulsifiable concentrates, or powders, which will cause more pesticide residues when used, and the timeliness of bird repellent is also poor. There have also been a variety of bird damage incidents. These repellents mainly use bitterness and toxicity to achieve the purpose of bird repellent. If used for a long time, they will also cause harm to birds and the environment, which does not meet the requirements of ecological protection and the national protection measures for birds. Moreover, they evaporate quickly, have a short use time, need to be replenished regularly, and are inconvenient to use.

[0005] In view of the above problems, there is an urgent need to develop an agricultural chemical bird repellent that can effectively repel birds, is easy to use, non-toxic and harmless, and has a long-lasting sustained release. It is of great significance and has obvious social and economic benefits. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a long-acting sustained-release bird-repellent composite flavor granule and a preparation method thereof, which has good bird-repellent effect, long duration, and is harmless to birds and the environment.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: A long-acting sustained-release bird-repellent composite flavor granule is composed of the following raw materials by weight percentage: 0.1-10% bird repellent, 0.01-3% stabilizer, 10-45% sustained-release carrier, 0.3-5% film-forming agent, 0.1-0.7% warning dye, and filler filled to 100%.

[0008] The bird-repellent composite flavor granules of the present invention utilize composite flavors to release special odors to form a layer of odor barrier. When birds smell the odors emitted by the bird-repellent components, their trigeminal nerves produce an allergic reaction, causing physiological anorexia and nausea reactions, thereby causing the birds to fly away or migrate for food, and not come back during their memory period. Moreover, after pecking, the bird-repellent will produce a strong taste sensation on the birds, causing the birds to refuse to eat, thereby achieving the bird-repellent effect. By utilizing two slow-release technologies, slow-release carrier and slow-release coating, the bird-repellent components can be slowly released, having a long-acting slow-release function, good bird-repellent effect, and long duration. In addition, by utilizing bright warning colors, the visual nervous systems of birds are stimulated to alert them to this place. When they fly again, they easily remember that there is an unpleasant odor here, and thus dare not approach, thereby achieving the effect of bird-repellent.

[0009] Furthermore, the bird repellent is one or more of 3-hydroxy-4-methoxybenzaldehyde, patchouliene or peppermint oil.

[0010] 3-Hydroxy-4-methoxybenzaldehyde is an aromatic hydrocarbon compound that can irritate the eyes, respiratory tract and skin, and can stimulate birds' vision, causing them to have an uncomfortable reaction; Patchouliene is the most powerful plant fragrance, which can strengthen the central nervous system. High doses can have a stimulating effect, and the smell lingers for a long time, making birds uncomfortable or even disgusted; Peppermint oil is spicy, cool, and has a strong irritating smell, which can stimulate birds' visual, taste and other nervous systems, causing them to refuse to eat; all three substances have a strong smell, which can stimulate the trigeminal nervous system of birds, causing them to have allergic and vomiting reactions, and prompting them not to come back to forage during the memory period. It can effectively drive away birds without harming them.

[0011] Furthermore, when there is one bird repellent component, the added amount is 0.1-5%, and when there are two or more bird repellent components, the total amount added is 0.1-10%.

[0012] Furthermore, the stabilizer is one or more of glutathione, diphenylamine or pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

[0013] Furthermore, the sustained-release carrier is one or more of activated carbon, white carbon black, β-cyclodextrin or gelatin.

[0014] Furthermore, the film-forming agent is one or more of chitosan, glutaraldehyde, ethyl cellulose or gum arabic.

[0015] Furthermore, the warning dye is one or more of carmine or capsanthin.

[0016] Furthermore, the filler is one or more of kaolin, talcum powder, gypsum powder or furnace ash.

[0017] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) Add the bird repellent and stabilizer into the reactor and mix them evenly; (2) Add the sustained-release carrier into a reaction kettle, stir and react at a temperature of 40-60°C for 30-60 minutes; (3) Add the filler and warning dye into a reaction kettle and mix them evenly, then granulate, screen and dry them at a temperature of 50-80°C for 2-4 hours to obtain a semi-finished bird repellent composite flavor granule; (4) Add the film-forming agent to the reaction kettle, react at a temperature of 40-45°C for 15-40 minutes, then add the semi-finished bird-repellent compound flavor granules for coating at a coating temperature of 40-60°C for 15-40 minutes to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0018] Furthermore, the granulation method is any one of roller or extrusion; the moisture content of the semi-product of the bird-repellent granules is ≤3%, and the particle size is 2000-4000um.

[0019] A method for using a long-acting sustained-release bird-repellent compound flavor granule is as follows: pile application, broadcast application, and hanging application. The pile application method is as follows: 5-10 long-acting sustained-release bird-repellent compound flavor granules are piled up every 1-1.5 meters, and 300-500 points are applied to each acre. The broadcast application method is as follows: on a dry plot, the long-acting sustained-release bird-repellent compound flavor granules are evenly spread according to the usage amount. The hanging method is as follows: waste air-permeable packaging bags, such as waste gauze, plastic bags, woven bags, and non-woven bags, are filled with the long-acting sustained-release bird-repellent compound flavor granules, and 8-12 granules are placed in each bag for hanging, and 60-90 points are hung per acre.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) The long-acting sustained-release bird-repellent composite flavor granules of the present invention have good bird-repellent effect and long duration, and can effectively reduce birds' feeding on crop seeds or young shoots for a long time, and can reduce the feeding amount by 50-80%. For the feeding of crops in the mature stage, it can reduce the feeding amount by 60-90%.

[0021] (2) The long-acting sustained-release bird-repellent composite flavor granules of the present invention are made of composite flavor bird-repellent active ingredients and various additives that are harmless to organisms, and adopt two sustained-release technologies, namely, sustained-release carrier and sustained-release coating. They have no direct contact with crops and leave no residue on crops.

[0022] (3) The long-acting sustained-release bird-repellent composite flavor granules of the present invention can form an odor belt around crops. The odor belt can not only repel flying birds, but also effectively repel beasts, and is harmless to birds and beasts. While protecting crops, it will not harm birds and beasts. It has good environmental protection effect and good repellent effect, which protects the normal planting and management of crops, improves crop yield and quality, and reduces seedling costs.

[0023] (4) The present invention adds warning dyes to obtain a long-acting sustained-release bird-repellent composite flavor granules with bright colors. The bright warning colors can stimulate the visual nervous system of birds and make them alert to this place. When they fly over again, they can easily remember that there is an unpleasant smell here and dare not approach, thus playing a role in repelling birds. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The sparrow refusal rate for wheat; Figure 2 is the magpie refusal rate of wheat; Figure 3 The pigeon refusal rate for wheat; Figure 4 The sparrow feeding refusal rate for rice; Figure 5 is the magpie feeding refusal rate of rice; Figure 6 The pigeon refusal rate for rice; Figure 7 The sparrow's refusal rate for cherries; Figure 8 The magpie refusal rate for cherries; Fig. 9 The pigeon refusal rate for cherries. DETAILED DESCRIPTION

[0025] Example 1 A long-acting sustained-release bird-repellent composite flavor granule is composed of the following raw materials by weight percentage: 0.6% 3-hydroxy-4-methoxybenzaldehyde, 1.0% patchouliene, 0.8% glutathione, 35.0% activated carbon, 5.0% beta-cyclodextrin, 0.1% carmine, 0.5% chitosan, 2.0% glutaraldehyde, 45.0% kaolin, and 10.0% talc.

[0026] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) Add 6 kg of 3-hydroxy-4-methoxybenzaldehyde, 10 kg of patchouli and 8 kg of glutathione into a reactor and mix and stir evenly; (2) Add 350 kg of activated carbon and 50 kg of β-cyclodextrin into a reactor and stir the reaction at 40 °C for 30 min; (3) 450 kg of kaolin, 100 kg of talc and 1 kg of carmine were put into a reaction kettle and mixed evenly, followed by drum granulation and screening, and then dried at 50° C. for 2 h to obtain a semi-finished bird repellent composite flavor granule; (4) 5 kg of chitosan and 20 kg of glutaraldehyde were added into a reactor and reacted at 40°C for 20 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 40°C and the coating time was 30 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0027] Example 2 A long-acting sustained-release bird-repellent composite flavor granule, composed of the following raw materials by weight percentage: 1.0% 3-hydroxy-4-methoxybenzaldehyde, 0.8% patchouliene, 0.9% diphenylamine, 30.0% activated carbon, 6.0% white carbon black, 1.0% gelatin, 0.1% capsanthin, 0.8% ethyl cellulose, 2.0% glutaraldehyde, 37.4% kaolin, 10.0% furnace ash, and 10.0% gypsum powder.

[0028] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) Add 10 kg of 3-hydroxy-4-methoxybenzaldehyde, 8 kg of patchouli and 9 kg of diphenylamine into a reaction kettle and mix and stir evenly; (2) 300 kg of activated carbon, 60 kg of white carbon black and 10 kg of gelatin were put into a reactor and stirred at 50 °C for 40 min; (3) 374 kg of kaolin, 100 kg of furnace ash, 100 kg of gypsum powder and 1 kg of capsicum red were put into a reaction kettle and mixed evenly, followed by drum granulation and screening, and then dried at 50°C for 2.5 h to obtain a semi-finished bird repellent composite flavor granule; (4) 8 kg of ethyl cellulose and 20 kg of glutaraldehyde were added into a reaction kettle and reacted at a temperature of 45°C for 15 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 45°C and the coating time was 20 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0029] Example 3 A long-acting sustained-release bird-repellent composite flavor granule, which is composed of the following raw materials by weight percentage: 0.6% 3-hydroxy-4-methoxybenzaldehyde, 1.0% peppermint, 0.9% pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 32.0% activated carbon, 8.0% β-cyclodextrin, 1.0% gum arabic, 1.5% glutaraldehyde, 30.0% kaolin and 25.0% gypsum powder.

[0030] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) 6 kg of 3-hydroxy-4-methoxybenzaldehyde, 10 kg of peppermint and 9 kg of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] were added into a reaction kettle and mixed and stirred evenly; (2) 320 kg of activated carbon and 80 kg of β-cyclodextrin were added to the reactor and stirred at 50 °C for 50 min; (3) 300 kg of kaolin, 250 kg of gypsum powder and 1 kg of capsanthin were put into a reaction kettle and mixed evenly, extruded into granules, sieved, and dried at 70°C for 2 hours to obtain a semi-finished bird repellent composite flavor granule; (4) 10 kg of gum arabic and 15 kg of glutaraldehyde were added into a reactor and reacted at 45°C for 20 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 45°C and the coating time was 40 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0031] Example 4 A long-acting sustained-release bird-repellent composite flavor granule, which is composed of the following raw materials by weight percentage: 0.8% patchouliene, 0.7% peppermint, 0.5% glutathione, 0.5% pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 32.0% activated carbon, 8.0% white carbon black, 0.1% carmine, 0.1% capsanthin, 0.8% chitosan, 1.7% glutaraldehyde, 30.0% talc and 24.8% gypsum powder.

[0032] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) 8 kg of patchouliene, 7 kg of peppermint, 5 kg of glutathione, and 5 kg of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] were added into a reaction kettle and mixed and stirred evenly; (2) 320 kg of activated carbon and 80 kg of white carbon black were added to the reactor, stirred and reacted at 45 °C for 50 min; (3) 300 kg of talcum powder, 248 kg of gypsum powder, 1 kg of carmine and 1 kg of capsicum red were put into a reaction kettle and mixed evenly, extruded into granules, sieved, and dried at 50°C for 4 hours to obtain a semi-finished bird repellent composite flavor granule; (4) 8 kg of chitosan and 17 kg of glutaraldehyde were added into a reactor and reacted at 40°C for 20 min. The semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 40°C and the coating time was 30 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0033] Example 5 A long-acting sustained-release bird-repellent composite flavor granule, which is composed of the following raw materials by weight percentage: 1.6% of patchouliene, 0.8% of diphenylamine, 35.0% of activated carbon, 10.0% of beta-cyclodextrin, 0.3% of capsanthin, 0.8% of gum arabic, 1.8% of glutaraldehyde, and 49.7% of kaolin.

[0034] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) Add 16 kg of patchouliene and 8 kg of diphenylamine into a reactor and mix and stir evenly; (2) Add 350 kg of activated carbon and 100 kg of β-cyclodextrin into a reactor and stir the reaction at 40 °C for 30 min; (3) 497 kg of kaolin and 3 kg of capsanthin were added into a reaction kettle and mixed evenly, extruded into granules, sieved, and dried at 50° C. for 2 h to obtain a semi-finished bird repellent composite flavor granule; (4) 8 kg of gum arabic and 18 kg of glutaraldehyde were added into a reactor and reacted at 45°C for 20 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 40°C and the coating time was 30 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0035] Example 6 A long-acting sustained-release bird-repellent composite flavor granule, which is composed of the following raw materials by weight percentage: 1.5% peppermint, 1.0% pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 32.0% activated carbon, 8.0% white carbon black, 0.2% carmine, 0.8% chitosan, 1.7% glutaraldehyde, 30.0% talc and 24.8% gypsum powder.

[0036] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) 15 kg of peppermint and 10 kg of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] were added into a reaction kettle and mixed and stirred evenly; (2) 320 kg of activated carbon and 80 kg of white carbon black were added to the reactor and stirred at 45 °C for 30 min; (3) 300 kg of talcum powder, 248 kg of gypsum powder and 2 kg of carmine were put into a reaction kettle and mixed evenly, followed by drum granulation and screening, and then dried at 50°C for 3 hours to obtain a semi-finished bird repellent composite flavor granule; (4) 8 kg of chitosan and 17 kg of glutaraldehyde were added into a reactor and reacted at 40°C for 30 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 40°C and the coating time was 40 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0037] Example 7 A long-acting sustained-release bird-repellent composite flavor granule, which is composed of the following raw materials by weight percentage: 1.4% 3-hydroxy-4-methoxybenzaldehyde, 0.5% glutathione, 0.5% diphenylamine, 36.0% activated carbon, 4.0% white carbon black, 0.1% capsanthin, 0.8% gum arabic, 1.7% glutaraldehyde, 20.0% kaolin, and 35.0% gypsum powder.

[0038] A method for preparing a long-acting sustained-release bird-repellent composite flavor granule comprises the following steps: (1) Add 14 kg of 3-hydroxy-4-methoxybenzaldehyde, 5 kg of glutathione and 5 kg of diphenylamine into a reaction kettle and mix and stir evenly; (2) 320 kg of activated carbon and 80 kg of white carbon black were added to the reactor, stirred and reacted at 45 °C for 50 min; (3) 200 kg of kaolin, 350 kg of gypsum powder and 1 kg of capsanthin are put into a reaction kettle and mixed evenly, extruded into granules, sieved, and dried at 55°C for 2 hours to obtain a semi-finished bird repellent composite flavor granule; (4) 8 kg of gum arabic and 17 kg of glutaraldehyde were added into a reactor and reacted at 40°C for 20 min. Then, the semi-finished bird-repellent compound flavor granules were slowly added for coating. The coating temperature was 40°C and the coating time was 40 min to obtain a long-acting sustained-release bird-repellent compound flavor granules.

[0039] Experimental Example 1 Wheat was mixed with the bird repellent composite flavor granules of Examples 1-7 at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, which were recorded as experimental groups 1-7. Wheat was mixed with the composite flavor granules prepared without adding bird repellent components at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, which was recorded as the control group.

[0040] The specific method is: raise magpies, sparrows, pigeons, etc. in a greenhouse, feed wheat regularly, and measure the average food intake of a single bird. Record the weight difference before and after feeding, calculate the feeding rate and refusal rate, repeat the experiment three times, and calculate the average value.

[0041] Among them, feeding rate = (original weight - remaining weight after feeding) / original weight * 100%; Feed refusal rate = (CK feeding rate - treatment feeding rate) / CK feeding rate * 100%; The CK feeding rate is the feeding rate of the control group, and the treatment feeding rate is the feeding rate of the experimental group.

[0042] Table 1. Feeding rate and food refusal rate From Table 1, we can see that after wheat was mixed with bird repellent compound flavor granules, the refusal rate of sparrows was greater than 75.0%, the refusal rate of magpies was greater than 75.7%, and the refusal rate of pigeons was greater than 75.8%. Figure 1-3 It can be seen that after wheat is mixed with the bird-repellent composite flavor granules, the feeding refusal rate of sparrows, magpies and pigeons does not decrease much from 12 hours to 96 hours. It can be seen that the bird-repellent composite flavor granules prepared by the present invention have a significant bird-repellent effect, a long action time, and can effectively reduce birds' feeding on crop seeds.

[0043] Experimental Example 2 The rice was mixed with the bird repellent composite flavor granules of Examples 1-7 at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, which were recorded as experimental groups 1-7. The rice was mixed with the composite flavor granules prepared without the bird repellent composition at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, which was recorded as the control group.

[0044] The specific method is: raise magpies, sparrows, pigeons, etc. in a greenhouse, feed them rice regularly, and measure the average food intake of a single bird. Record the weight difference before and after feeding, calculate the feeding rate and food refusal rate, repeat the experiment three times, and calculate the average value.

[0045] Among them, feeding rate = (original weight - remaining weight after feeding) / original weight * 100%; Feed refusal rate = (CK feeding rate - treatment feeding rate) / CK feeding rate * 100%.

[0046] Table 2. Feeding rate and food refusal rate From Table 2, we can see that after rice is mixed with bird repellent compound flavor granules, the refusal rate of sparrows is greater than 75.2%, the refusal rate of magpies is greater than 75.8%, and the refusal rate of pigeons is greater than 75.7%. Figure 4-6 It can be seen that after the rice is mixed with the bird-repellent composite flavor granules, the feeding refusal rate of sparrows, magpies and pigeons does not decrease much from 12 hours to 96 hours. It can be seen that the bird-repellent composite flavor granules prepared by the present invention have a significant bird-repellent effect, a long action time, and can effectively reduce birds' feeding on crop seeds.

[0047] Experimental Example 3 Cherries were mixed with the bird repellent composite flavor granules of Examples 1-7 at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, recorded as experimental groups 1-7. Cherries were mixed with the composite flavor granules prepared without the bird repellent composition at a mass ratio of 3:1, and the repellent effect was tested within 96 hours, recorded as the control group.

[0048] The specific method is: raise magpies, sparrows, pigeons, etc. in a greenhouse, feed cherries regularly, and measure the average food intake of a single bird. Record the weight difference before and after feeding, calculate the feeding rate and refusal rate, repeat the experiment three times, and calculate the average value.

[0049] Among them, feeding rate = (original weight - remaining weight after feeding) / original weight * 100%; Feed refusal rate = (CK feeding rate - treatment feeding rate) / CK feeding rate * 100%.

[0050] Table 3. Feeding rate and food refusal rate From Table 3, we can see that after cherry and bird repellent compound flavor granules are mixed, the refusal rate of sparrows is greater than 75.5%, the refusal rate of magpies is greater than 75.1%, and the refusal rate of pigeons is greater than 76.2%. Figure 7-9 It can be seen that after cherry is mixed with the bird-repellent compound flavor granules, the feeding refusal rate of sparrows, magpies and pigeons decreases slightly from 12 hours to 96 hours. It can be seen that the bird-repellent compound flavor granules prepared by the present invention have a significant bird-repellent effect, a long action time, and can effectively reduce the feeding of birds.

[0051] Experimental Example 4: Experiment on the long-term effect of bird-repellent composite flavor granules 30g of wheat and 10g of the bird-repellent composite flavor granules of Examples 1-7 were mixed evenly, and the repellent effect was tested within 30 days. 30g of wheat and 10g of the composite flavor granules prepared without adding bird repellent components were mixed evenly, and the repellent effect was tested within 30 days, which was recorded as the control group.

[0052] The specific method is: raise magpies, sparrows, pigeons, etc. in a greenhouse, feed wheat regularly, and measure the average food intake of a single bird. Record the weight difference before and after feeding, calculate the feeding rate and refusal rate, repeat the experiment three times, and calculate the average value.

[0053] Among them, feeding rate = (original weight - remaining weight after feeding) / original weight * 100%; Feed refusal rate = (CK feeding rate - treatment feeding rate) / CK feeding rate * 100%; The CK feeding rate is the feeding rate of the control group, and the treatment feeding rate is the feeding rate of the experimental group.

[0054] Table 4. Magpie's refusal to eat at different time periods Table 5. Sparrows' refusal to eat at different time periods Table 6. Feed refusal rate of pigeons at different time periods It can be seen from Tables 4-6 that after wheat was mixed with different examples of bird-repellent compound flavor granules, within 30 days, the feeding refusal rate of sparrows was greater than 75.2%, the feeding refusal rate of magpies was greater than 75.3%, and the feeding refusal rate of pigeons was greater than 75.5%. It can be seen that the bird-repellent compound flavor granules still have a significant bird-repellent effect after 30 days of use, indicating that the bird-repellent compound flavor granules prepared by the present invention have a long time effect and a long action time, and can effectively reduce birds' feeding on crop seeds.

[0055] Experimental Example 5 Study on the acute toxicity of bird-repellent compound flavor granules As a repellent, the principle and goal of screening bird repellent compound flavor granules is that they should have high repellency, the bird refusal rate should reach more than 75%, no harm to crops, fruits and plants, no pollution to the environment, no harm to birds and beneficial organisms, and safe for humans and animals. It is more representative to dilute the bird repellent compound flavor granules with water at a ratio of 1g:2mL for acute inhalation toxicity test.

[0056] The experimental animals were healthy adult rats, half female and half male, weighing 180-220 grams. All animals were adaptively fed for 5 days before the experiment, with free access to water and food. The static poisoning method was used, and the experimental animals were placed in a sealed container (poisoning cabinet) of a certain volume, 10g of bird-repellent compound fertilizer was selected, 20mL of deionized water was added to dissolve it, and it was completely atomized in the poisoning cabinet through an atomizer to reach the required concentration, and the inhalation poisoning lasted for 2 hours.

[0057] Preliminary study: 6 rats, half female and half male, dosed at 10000 mg / m 3 , observe the poisoning symptoms and mortality of rats within 24 hours, and estimate the possible range of LC50.

[0058] Formal test: 20 rats, half male and half female. The dose was set at 10000 mg / m 3 The dose is inhaled for 2 hours, and the poisoning symptoms and deaths of animals are observed within 14 days to determine the LC50 range.

[0059] Result: 10000 mg / m 3 After inhalation of the dose, rats showed no obvious symptoms of poisoning and no deaths. After the observation period, the surviving rats were dissected and no obvious abnormalities were found in the heart, lungs, liver, spleen, stomach, intestines and other organs. The acute inhalation LC50 (2h) of the bird-repellent compound flavor granules in rats was greater than 10,000 mg / m 3 The results of the toxicity experiments are shown in Table 4.

[0060] Table 7. Results of acute inhalation toxicity test of bird-repellent compound flavor granules on rats From Table 7, we can see that the acute inhalation LC50 (2h) of bird repellent compound flavor granules in rats is greater than 10000 mg / m 3 According to the Technical Specifications for Chemical Toxicity Identification (2005 Edition) of my country, the acute inhalation LC50 (2h) of the test substance bird-repellent composite flavor granules of the present invention for rats is greater than 10000 mg / m 3 , which is non-toxic.

Claims

1. A long-acting sustained-release bird-repellent composite flavor granule, characterized in that: The invention is composed of the following raw materials by weight percentage: 0.1-10% bird repellent, 0.01-3% stabilizer, 10-45% slow-release carrier, 0.3-5% film-forming agent, 0.1-0.7% warning dye, and the filler is filled to 100%.

2. The long-acting sustained-release bird-repellent composite flavor granules according to claim 1, characterized in that: The bird repellent is one or more of 3-hydroxy-4-methoxybenzaldehyde, patchouliene or peppermint oil; When the bird repellent component is one, the added amount is 0.1-5%, and when the bird repellent component is two or more, the total amount added is 0.1-10%.

3. The long-acting sustained-release bird-repellent composite flavor granules according to claim 1, characterized in that: The stabilizer is one or more of glutathione, diphenylamine or pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

4. The long-acting sustained-release bird-repellent composite flavor granules according to any one of claims 1 to 3, characterized in that: The sustained-release carrier is one or more of activated carbon, white carbon black, beta-cyclodextrin or gelatin.

5. The long-acting sustained-release bird-repellent composite flavor granules according to claim 4, characterized in that: The film-forming agent is one or more of chitosan, glutaraldehyde, ethyl cellulose or gum arabic.

6. The long-acting sustained-release bird-repellent composite flavor granules according to claim 1, characterized in that: The warning dye is one or more of carmine or capsicum red.

7. The long-acting sustained-release bird-repellent composite flavor granules according to claim 6, characterized in that: The filler is one or more of kaolin, talcum powder, gypsum powder or furnace ash.

8. A method for preparing the long-acting sustained-release bird-repellent composite flavor granules according to claim 1, characterized in that: The following steps are involved: (1) Add the bird repellent and stabilizer into a reaction kettle and mix and stir evenly; (2) Add the sustained-release carrier into a reaction kettle, stir and react at a temperature of 40-60°C for 30-60 minutes; (3) Add the filler and warning dye into a reaction kettle and mix them evenly, and then granulate, screen and dry them at a temperature of 50-80° C. for 2-4 hours to obtain a semi-finished bird repellent composite flavor granule; (4) Add the film-forming agent to the reactor for reaction at a temperature of 40-45°C for 15-40 minutes, then add the semi-finished bird-repellent composite flavor granules for coating at a coating temperature of 40-60°C for 15-30 minutes to obtain a long-acting sustained-release bird-repellent granule.

9. The method for preparing the long-acting sustained-release bird-repellent composite flavor granules according to claim 8, characterized in that: The granulation method is any one of roller or extrusion; the water content of the semi-product of the bird-repellent granules is ≤3%, and the particle size is 2000-4000um.

10. A method for using the long-acting sustained-release bird-repellent composite flavor granules according to claim 1, characterized in that: The usage methods are: pile application, broadcast application, and hanging application. The pile application method is: pile 5-10 long-acting sustained-release bird-repellent compound flavor granules per pile, pile them every 1-1.5 meters, and apply 300-500 points per mu. The broadcast application method is: on a dry plot, evenly spread the long-acting sustained-release bird-repellent compound flavor granules according to the usage amount. The hanging method is: use waste air-permeable packaging bags, such as waste gauze, plastic bags, woven bags, and non-woven bags, fill them with long-acting sustained-release bird-repellent compound flavor granules, put 8-12 granules in each bag for hanging, and hang 60-90 points per mu.

Images