Environment-friendly pesticide and preparation method thereof

Abstract

The application provides an environment-friendly pesticide and a preparation method thereof, and relates to the technical field of pesticides.The environment-friendly pesticide is composed of pesticide carriers, active substances, surfactants, synergistic buffers, penetrating agents, stabilizers and the like.The environment-friendly pesticide has the advantages of quick effect, wide prevention and treatment spectrum, difficulty in being restricted and interfered by environmental factors, stable quality, and the like, and the effectiveness of the active components of the environment-friendly pesticide is improved through the synergistic effect of various auxiliary agents.

Description

Technical Field

[0001] This invention relates to the field of pesticide technology, and in particular to an environmentally friendly pesticide and its preparation method. Background Technology

[0002] Pesticides are generally chemically synthesized or derived from biological or other natural products. Their mechanisms of action mostly involve interfering with the nervous, metabolic, or reproductive systems of harmful organisms, thereby achieving the purpose of killing or controlling them. However, commonly used pesticides generally have the following problems: they are mostly highly toxic and have high residue levels, which are harmful to humans and animals, and may cause poisoning, cancer, teratogenicity, and other consequences; they pollute and damage the environment, affecting soil fertility, water quality safety, and biodiversity; they easily lead to pesticide resistance in pests, reducing control effectiveness and increasing application rates and costs; and they are subject to restrictions and resistance from domestic and international markets and consumers, affecting the quality of agricultural products and exports. Therefore, the development of environmentally friendly pesticides has become an important trend in the future development of the pesticide industry. Environmentally friendly pesticides refer to pesticides that are safe and harmless to human health, environmentally friendly, require ultra-low dosages, are highly selective, and are produced through green processes. Their mechanisms of action mostly utilize photodynamic effects, chemical pheromones, and plant resistance induction to achieve the purpose of prevention or regulation. Environmentally friendly pesticides have many advantages over ordinary pesticides, such as: being harmless or low-toxic to humans, animals and plants, and not causing food safety problems or health risks; being environmentally friendly or biodegradable, and not causing pollution or damage, and even improving soil structure and microbial activity; having ultra-low dosage and high selectivity, which can reduce the number and amount of application, improve the control effect and economic benefits; and meeting the needs and preferences of domestic and foreign markets and consumers, which is conducive to improving the quality and competitiveness of agricultural products.12

[0003] However, there are still many unresolved issues in the actual research and development and application of environmentally friendly pesticides, such as: high research and development difficulty, high investment cost, low market share; slow onset of action, narrow control spectrum, susceptibility to environmental factors and interference, poor quality stability; and relatively complex application methods and conditions. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an environmentally friendly pesticide and its preparation method, overcoming the issues of slow effectiveness, narrow spectrum of control, susceptibility to environmental factors and interference, and poor quality stability of existing environmentally friendly pesticides.

[0005] The environmentally friendly pesticide of the present invention comprises the following raw materials in weight percentage: pesticide carrier 1.0-99.0%, active substance 0.1-50.0%, surfactant 0.1-25.0%, synergistic buffer 0.1-50.0%, penetrant 0.1-25.0%, and stabilizer 0.5-25%.

[0006] Preferably, the environmentally friendly pesticide comprises the following raw materials in weight percentages: pesticide carrier 80.0%, active substance 8.5%, surfactant 0.5%, synergistic buffer 10.0%, penetrant 0.5%, and stabilizer 0.5%.

[0007] Preferably, the environmentally friendly pesticide comprises the following raw materials in weight percentages: pesticide carrier 90.0%, active substance 2.5%, surfactant 1.5%, synergistic buffer 1%, penetrant 1.5%, and stabilizer 3.5%.

[0008] Preferably, the environmentally friendly pesticide comprises the following raw materials in weight percentages: pesticide carrier 50.0%, active substance 12.0%, surfactant 5.0%, synergistic buffer 20.0%, penetrant 10.0%, and stabilizer 3.0%.

[0009] Preferably, the environmentally friendly pesticide comprises the following raw materials by weight percentage: pesticide carrier 45.0%, active substance 29.0%, surfactant 10.0%, synergistic buffer 5.0%, penetrant 2.5%, and stabilizer 8.5%.

[0010] Furthermore, the pesticide carrier is one or more of precipitated silica, colloidal silica, attapulgite, and kaolin.

[0011] Furthermore, the active substance is composed of two or three of the following: bifenthrin, sodium lauryl sulfate, and azadirachtin.

[0012] Furthermore, the surfactant is one or both of sodium lignosulfonate and sorbitol polyoxyethylene ether.

[0013] Furthermore, the synergistic buffer is one or more of lactose, glucose, fructose, maltose, sucrose, and urea.

[0014] Furthermore, the synergistic buffer is one or more of the aqueous solutions of lactose, glucose, fructose, maltose, sucrose, and urea.

[0015] Furthermore, the penetrant is one or more of rapeseed oil, cottonseed oil, and biodiesel.

[0016] Furthermore, the stabilizer is one or more of linoleic acid, methyl palmitate, and butylated hydroxyanisole.

[0017] Another object of the present invention is to provide a method for preparing the environmentally friendly pesticide, specifically comprising the following steps:

[0018] S1. The active substance is mixed with the pesticide carrier to form the first mixture;

[0019] S2. Add the surfactant to the first mixture to form the second mixture;

[0020] S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture;

[0021] S4. After grinding the third mixture, add water to moisten it and granulate it to obtain the finished environmentally friendly pesticide.

[0022] Furthermore, in S3, the third mixture after grinding has a D90≦10μm.

[0023] The environmentally friendly pesticide of this invention can be used for tree injection on lawns, ornamental plants such as flowers, shrubs, broad-leaved trees or evergreen plants, pest control, weeding, etc.

[0024] The target crops of the environmentally friendly pesticides described in this invention include, but are not limited to: barley, corn, millet, oats, rice, rye, sorghum, black wheat, wheat; cotton, flax, sisal; sugar beets, coffee, rapeseed, sugarcane, sunflower, tea, tobacco; blackberries, blueberries, cranberries, strawberries; apples, apricots, bananas, cherries, peaches, pears; broad beans, lentils, peas, soybeans; almonds, cashews, peanuts, hazelnuts, walnuts; asparagus, eggplant, broccoli, cabbage, carrots, cucumbers, garlic, lettuce, bone marrow, melons, okra, onions, peppers, potatoes, pumpkins, rhubarb, spinach, tomatoes, and grapes.

[0025] The environmentally friendly pesticides described in this invention target crop diseases including but not limited to: powdery mildew, gray mold, Phytophthora blight, rust, Alternaria leaf spot, leaf spot, anthracnose, downy mildew, sclerotinia rot, bacterial wilt, Verticillium wilt, soft rot, downy mildew, root-knot nematode disease, and Fusarium graminearum disease.

[0026] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0027] (1) The environmentally friendly pesticide of the present invention has a fast effect, a broad spectrum of control, is not easily restricted or interfered with by environmental factors, and has stable quality;

[0028] (2) This invention improves the effectiveness of environmentally friendly pesticide active ingredients through the synergistic effect of multiple adjuvants.

[0029] The technical solution provided by the present invention will be further described below with reference to the embodiments.

[0030] Example 1

[0031] An environmentally friendly pesticide is composed of the following raw materials in weight percentages: pesticide carrier 80.0%, active substance 8.5%, surfactant 0.5%, synergistic buffer 10.0%, penetrant 0.5%, and stabilizer 0.5%; wherein the pesticide carrier is attapulgite clay, the active substance is a mixture of bifenthrin and azadirachtin in a weight ratio of 1:3, the surfactant is sodium lignosulfonate, the synergistic buffer is a 25wt% sucrose solution, the penetrant is rapeseed oil, and the stabilizer is methyl palmitate;

[0032] The preparation method of the environmentally friendly pesticide is as follows:

[0033] S1. The active substance is mixed with the pesticide carrier to form the first mixture;

[0034] S2. Add the surfactant to the first mixture to form the second mixture;

[0035] S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture;

[0036] S4. Grind the third mixture to D90≦10μm, then add water to wet it and granulate it to obtain the finished environmentally friendly pesticide.

[0037] Example 2

[0038] An environmentally friendly pesticide is composed of the following raw materials in weight percentages: pesticide carrier 90.0%, active substance 2.5%, surfactant 1.5%, synergistic buffer 1%, penetrant 1.5%, and stabilizer 3.5%; wherein the pesticide carrier is precipitated silica, the active substance is composed of bifenthrin, sodium lauryl sulfate, and azadirachtin in a weight ratio of 2:1:2, the surfactant is sorbitol polyoxyethylene ether, the synergistic buffer is a 30% maltose aqueous solution, and the penetrant is cottonseed oil;

[0039] The preparation method of the environmentally friendly pesticide is as follows:

[0040] S1. The active substance is mixed with the pesticide carrier to form the first mixture;

[0041] S2. Add the surfactant to the first mixture to form the second mixture;

[0042] S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture;

[0043] S4. Grind the third mixture to D90≦10μm, then add water to wet it and granulate it to obtain the finished environmentally friendly pesticide.

[0044] Example 3

[0045] An environmentally friendly pesticide is composed of the following raw materials in weight percentages: pesticide carrier 50.0%, active substance 12.0%, surfactant 5.0%, synergistic buffer 20.0%, penetrant 10.0%, and stabilizer 3.0%; wherein the pesticide carrier is kaolin, the active substance is composed of bifenthrin, sodium lauryl sulfate, and azadirachtin in a weight ratio of 1:1:2, the surfactant is sorbitol polyoxyethylene ether, the synergistic buffer is urea, the penetrant is cottonseed oil, and the stabilizer is linoleic acid;

[0046] The preparation method of the environmentally friendly pesticide is as follows:

[0047] S1. The active substance is mixed with the pesticide carrier to form the first mixture;

[0048] S2. Add the surfactant to the first mixture to form the second mixture;

[0049] S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture;

[0050] S4. Grind the third mixture to D90≦10μm, then add water to wet it and granulate it to obtain the finished environmentally friendly pesticide.

[0051] Example 4

[0052] An environmentally friendly pesticide is composed of the following raw materials in weight percentages: pesticide carrier 45.0%, active substance 29.0%, surfactant 10.0%, synergistic buffer 5.0%, penetrant 2.5%, and stabilizer 8.5%; wherein the pesticide carrier is colloidal silica, the active substance is composed of bifenthrin and sodium dodecyl sulfate in a weight ratio of 3:1, the surfactant is sodium lignosulfonate, the synergistic buffer is glucose, the penetrant is biodiesel, and the stabilizer is butylated hydroxyanisole;

[0053] The preparation method of the environmentally friendly pesticide is as follows:

[0054] S1. The active substance is mixed with the pesticide carrier to form the first mixture;

[0055] S2. Add the surfactant to the first mixture to form the second mixture;

[0056] S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture;

[0057] S4. Grind the third mixture to D90≦10μm, then add water to wet it and granulate it to obtain the finished environmentally friendly pesticide.

[0058] Test Example 1

[0059] The environmentally friendly pesticide prepared in Example 3 was used as a sample for testing.

[0060] The therapeutic and protective effects of the environmentally friendly pesticide against wheat leaf blight were tested at concentrations of 25.32 g / mu, 8.41 g / mu, 2.80 g / mu, and 0.93 g / mu, respectively. Each experimental unit consisted of 10-20 wheat plants planted in a 5cm × 5cm growth medium.

[0061] Wheat leaf blight pathogen was inoculated at the 2-leaf stage of wheat. The inoculation method was as follows: pathogen spores were collected, and an aqueous suspension of the spores was prepared, controlling the number of spores in the suspension to be 1×10⁻⁶. 6 Inoculate at a rate of 2.5 mL / plant using a spray method. After inoculation, place the wheat at 22°C in the dark for 24 hours, then transfer it to 20°C under light for 48 hours, and finally place it under light for 14 hours after 20 hours of light exposure. The wheat is then ready for subsequent testing. During inoculation and storage, apply liquid fertilizer as needed to maintain normal wheat growth.

[0062] Wheat treated with the conforming pesticide of the present invention 3 days before pathogen inoculation was designated as experimental group 1, wheat treated with the conforming pesticide of the present invention 2 days after pathogen inoculation was designated as experimental group 2, and wheat not treated with environmentally friendly pesticides was designated as control group.

[0063] Twenty-one days after inoculation, the samples were rated based on the percentage of leaves exhibiting leaf blight, expressed as disease level. Results showed that the disease level in experimental group 1 was 5%, in experimental group 2 it was 18%, and in the control group it was 86%. This demonstrates that the environmentally friendly pesticide of this invention has good preventative and curative effects against wheat leaf blight.

[0064] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An environmentally friendly pesticide for controlling wheat leaf blight, characterized in that, It is composed of the following raw materials in weight percentage: pesticide carrier 50.0%, active substance 12.0%, surfactant 5.0%, synergistic buffer 20.0%, penetrant 10.0%, and stabilizer 3.0%; the pesticide carrier is kaolin, the active substance is composed of bifenthrin, sodium lauryl sulfate, and azadirachtin in a weight ratio of 1:1:2, the surfactant is sorbitol polyoxyethylene ether, the synergistic buffer is urea, the penetrant is cottonseed oil, and the stabilizer is linoleic acid; The preparation method of the environmentally friendly pesticide is as follows: S1. The active substance is mixed with the pesticide carrier to form the first mixture; S2. Add the surfactant to the first mixture to form the second mixture; S3. Add the synergistic buffer, penetrant, and stabilizer to the second mixture to form the third mixture; S4. Grind the third mixture to D90≦10 μm, then add water to wet it and granulate it to obtain the finished environmentally friendly pesticide.