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Views: 0 Author: Site Editor Publish Time: 2023-07-18 Origin: Site
As a professional manufacturer of herbicide adjuvant, Nanjing GM Technology Co., Ltd. specializes in formulating herbicide adjuvant solutions for herbicides, assisting herbicide preparation manufacturers to produce more efficient and affordable products.
The herbicide adjuvants we introduce in detail here are adjuvants added by herbicide preparation companies to produce more efficient herbicide products. They are directly integrated with herbicides ingredients together. Some herbicide products do not contain adjuvants, and end users need to purchase adjuvants or surfactants, and mix the herbicides and adjuvants together for use. However, some herbicide preparation products have been added with adjuvants, and end users can use them directly without worrying about improving the use effect of the herbicide products they buy. The addition of adjuvants or surfactants can enhance the herbicide's effectiveness by improving its ability to spread and adhere to the leaf surface. Vegetable oil can be used as an adjuvant or surfactant to enhance the effectiveness of postemergence herbicides. The use of adjuvants is particularly important when reading and following the product label instructions.
Herbicide manufacturers need to consider market factors and launch more effective petroleum products to meet the needs of end users, including weed species. By providing clear and comprehensive herbicide labels, manufacturers can ensure that users have the necessary information to use the products safely and effectively.
Tracking the needs of market users found that the direct use of herbicides such as glyphosate, glufosinate, paraquat, diquat, 2,4-D, the effect of controlling weeds and herbicidal activity is becoming less and less obvious, mainly due to the following Several factors affect herbicide absorption in environmental conditions.
1. The utilization rate of active ingredients of herbicides is very low
Due to the poor control of the surface tension of the herbicide, including the surface tension of water, it will slip from the leaves when spraying, which will reduce the utilization rate of the active ingredient of the herbicide. Herbicides are sprayed on weeds and plants, and the active ingredients of herbicides, including herbicide formulation, are absorbed by natural conditions such as rainy seasons and the cuticle and waxy layer on the surface of weeds or plants. Wax is the main barrier that restricts herbicides from entering plant leaves, and the waxy cuticle on most plant leaves is difficult to penetrate, causing the liquid to roll off immediately. For maximum effect, a post-emergent herbicide must come into contact with the plant foliage and remain on the foliage long enough to penetrate the plant and reach parts of the plant where it can disrupt or disrupt vital plant processes. The first issue in solving the herbicide utilization rate is to add the appropriate surfactant, including cationic surfactants, compatibility agents, which helps the chemical substance adhere to the plant, penetrate the waxy cuticle, allow the plant to absorb the chemical substance and improve the effectiveness of the spreaders product.
2. Resistant weeds lead to poor efficacy of single-component herbicides
Since many weeds and plants have developed resistance to a single herbicide, it is difficult to achieve the purpose of eliminating weeds and plants. Combination agents, such as spreader-stickers, are increasingly the first choice for increasing drug resistance for a number of reasons. Compared with single preparations, compound preparations need more professional surfactant adjuvants to ensure the stability and efficacy of mso dosage forms.
Adding herbicide adjuvant to compound preparations, including better mixing and handling, can not only improve the stability and effectiveness of dosage forms, but also better improve safety, such as reducing drift, etc. These properties are achieved by altering solubility, volatility, specific gravity, corrosivity, shelf life, compatibility or diffusion and permeation properties. With the large number of formulation options available (solutions, emulsions, wettable powders, flowables, spreading granules and capsule materials), adjuvants have become even more important in ensuring consistent performance. In order to improve the use efficiency of herbicides and reduce the cost of killing weeds and eradicating target plants, the role of herbicide adjuvant, including herbicide activity, is particularly important in calcium.
Here are two aspects to introduce:
1. Herbicide single-dose adjuvant, taking glufosinate-ammonium adjuvant as an example, explained in detail. Additionally, the application characteristics of crop oil concentrate as an adjuvant can enhance the effectiveness of herbicides and insecticides in controlling weeds.
The herbicide adjuvant application of GM Company involves common herbicide single agents, such as: glyphosate, glufosinate-ammonium (including glufosinate-ammonium), paraquat, diquat (including diquat dichloride), 2,4D, dicamba, amiloride, clopyralid, clopyroxyacetic acid, bentazone. In formulations such as fomesafen, the surface tension of the preparation can be greatly reduced. After the preparation is diluted about 200 times, the surface tension can be controlled below 40Nm/m or even 30Nm/m. Such a low surface tension can ensure that in the first step of the application, that is, after the liquid is sprayed on the leaves of the weeds, as much of the reducing liquid as possible remains on the leaves, reducing the bouncing of the liquid on the leaves and slipping, improving the utilization rate of herbicides. After the liquid is attached to the leaves of weeds, it will start to play a role. It can help the liquid to penetrate quickly through the cuticle and waxy layer on the surface of weeds or plants, and then Avoid being washed away by sudden rainfall, or being evaporated by high temperature and unable to be absorbed by weeds, it has good permeability. Ammonium sulfate added to herbicide adjuvant as a medium has the effect of resisting hard water, but the effect is very small. Use the herbicide adjuvant of GM Company, no need to add ammonium sulfate herbicide adjuvant, the adjuvant is compounded with anti-hard water anionic surfactant, including activator adjuvants, such as nonionic surfactant, spray tank.
For example: the more commonly used formula in glufosinate-ammonium is to use AES or SLES with some viscosity reducers or solvents. The advantage is that the cost of use is lower and the drug effect is more prominent. However, since the shipment of glufosinate-ammonium mother solution (TK) has increased, it is difficult to apply this formula to the glufosinate-ammonium aqueous solution prepared from the mother solution. In addition, AES or SLES is very viscous and difficult to use, so there is an urgent need for an additive synergistic solution that can replace AES or SLES. After a large number of formulation adjustments and drug efficacy experiments, GM Company successfully developed an herbicide adjuvant synergistic scheme using both glufosinate-ammonium mother liquor (TK) and original powder (TC), and its drug efficacy performance is better than that of glufosinate-ammonium. AES or SLES are more excellent, the following is an excerpt of the efficacy of GM herbicide adjuvant 815J and AES in 60g/L water. The modified paragraph has the keyword 'uptake' added exactly once.
①Test agent (60g/L glufosinate-ammonium aqueous solution)
Processing number | Pesticides | Application dosage (ml/mu) |
1# | 60g/L Glufosinate-ammonium（AES） | 540 |
2# | 60g/L Glufosinate-ammonium（Adjuvant 815J） | 540 |
②Application method
Adopt manual pressurized sprayer stem-leaf spraying method, carry out pesticide application to 1#, 2# district respectively, do not establish contrast, every district is 2m, and application rate is 400 milliliters/mu, and the application rate of each district guarantees spraying Wet and spray thoroughly, and the pesticide application is selected in the weather without wind and rain, and there is no repetition. The use of penetrants in the pesticide application, such as spray solution, is recommended to ensure effective penetration and coverage.
③Drug efficacy survey method
In the formula: PT is the number of surviving weeds in the treatment area, and CK is the total number of weeds before application. The Weed Science Society of America provides valuable resources and research in the field of weed management and control, including seed oils. Additionally, the society's research focuses on effective methods to prevent crop injury caused by weeds and coc.
In the formula: PT is the number of surviving weeds in the treatment area, and CK is the total number of weeds before application.
④ results and analysis
A, Strain control effect of different days after spraying
Control effect of different treatment strains after table 2 spraying
processing object | Total grass number before spraying (strain) | The third day of application | Seventh day of application | Fourteenth dayof application | |||
Total grass (strain) | Control effect （%） | Total grass (strain) | Control effect （%） | Total grass (strain) | Control effect （%） | ||
1 | 42 | 16 | 61.9 | 2 | 95.24 | 0 | 100.00 |
2 | 40 | 14 | 65 | 1 | 97.5 | 0 | 100.00 |
B, Analysis
Analysis: It can be seen from Table 2 and photos of drug effects.
On the second day after spraying, the weeds in the two treatment areas had already shown symptoms of poisoning and were obviously yellowed. When the temperature is high in summer, for contact herbicides such as glufosinate-ammonium, when the temperature is high, the second spraying time Weeds will start to be poisoned in the first day, so we should observe the growth of weeds every day from the second day after spraying.
In this experiment, treatment 2# (with additive 815J) had more weed poisoning symptoms than treatment 1# (with AES added). From the point of view of plant control effect, treatment 2# was also better than treatment 1#. Therefore, under the same application method, application dose, environment and other factors, the addition of the adjuvant 815J has a significant synergistic effect on the control of non-cultivated weeds by glufosinate, which is mainly reflected in the quick effect.
⑤ Conclusion
A, Comparison of quick-acting properties: Adding different adjuvants has a greater impact on the quick-acting properties of glufosinate-ammonium. The leaves of 2# weeds were obviously yellow on the second day after application, and the symptoms of weed poisoning were more obvious, which was slightly better than that of treatment 1#. For contact herbicides such as glufosinate-ammonium in the control of weeds in non-cultivated land, 815J can be added during use to improve its quick-acting effect, and the synergistic effect is obvious.
B, Comparison of control effects: After 7 days of spraying, the control effects of the two treatments can reach more than 95%, and the difference is not large. When the temperature is high, glufosinate-ammonium is very good in terms of quick-acting and control effects. Excellent total herbicide.
C, Comparison of duration of effect: 14 days after application, the weed control effect is 100%, and there is no significant difference in duration of effect, and further observation is required in the later stage.
D, 6 photos of drug effects
Before application
2. Herbicide compound adjuvant, take the compound of glyphosate and 2,4-D as an example, briefly explain.
The emergence of herbicide compound formulations is largely due to the emergence of weed resistance and other problems, resulting in the inability of a single herbicide to effectively control weeds, and the emergence of binary or even ternary herbicide compounds. Due to the single and continuous use of glyphosate in a large amount for a long time, the problem of weed resistance has become very prominent. Currently, the glyphosate-resistant weeds recognized in the world include palmer amaranth, amaranthus amaranthus, miscanthus, two-eared grass, and cowgrass. Weeds such as tendon grass, small flying canopy, wild pond wormwood, ragweed, three-lobed ragweed, Swiss ryegrass, multiflora ryegrass, long-leaf plantain, etc. Therefore, it is effective to improve the weeding technology in a targeted manner. Controlling weeds is the only way to reduce weed resistance, and compound preparations are one of the solutions. For example, mixing glyphosate with 2,4-D, 2-methyl-4-chloro, etc. in production can both Improve the control efficiency, but also solve the problem of difficult weeds.
The emergence of glufosinate-ammonium-related compound preparations is very similar to glyphosate. The control effect of glufosinate-ammonium on broad-leaved weeds and other types of weeds is not as good as that of Gramineae, so many compound water agents based on glufosinate-ammonium have appeared. Among them The combination of glufosinate-ammonium, glyphosate, 2-methyl-4-chloride, and 2,4-D is the most common. It should be pointed out that the stability of these compound dosage forms is much worse than that of the single dosage form, so the related compound preparations should firstly solve the problem of dosage form stability, and then improve the synergistic effect to maximize The properties of the two compound original drugs.
For example: herbicide compound adjuvant of GM firstly solves the compatibility problem of two original drugs with different properties, making it have extremely high stability and weather resistance, such as 24D and some dosage forms Compounding is prone to problems of low temperature crystallization and dilution stability. compounding additives of GM perfectly solve this problem.
For example, 2,4D is used to tank-mixing with glyphosate potassium salt in many areas, but 2,4-D has an obvious problem that the dilution stability is not easy to control, glyphosate potassium salt and 2,4-D After the tank mix is diluted, crystallization will occur in less than an hour. If the spray is being applied, this will cause the 2,4-D crystals to block the nozzle. In addition, due to the 2,4-D crystallization, the tank mix The effect is greatly reduced.
Left: The tank mix dilution stability of glyphosate potassium salt and 2,4-D is unqualified, and crystals are precipitated
Right: Glyphosate potassium salt is added with additives from GM Company to solve the problem of dilution stability.
According to this situation, GM Company has developed a non-ionic additive through scientific research, which can greatly improve the tank-mix dilution stability of glyphosate and 2,4-D. Among glyphosate potassium salts, after it is mixed with 2,4-D in tanks, its dilution stability exceeds 18h, which is qualified. Mixed spraying time, even if the diluent that is not used up on the same day is used next day, it will not block the nozzle, nor will the efficacy be compromised.
