阅读说明：本技术 一种含有噁唑酰草胺和二氯喹啉酸的可分散油悬浮剂 (Dispersible oil suspending agent containing metamifop and quinclorac ) 是由 陈莉 朱德涛 李方芝 朱维玉 王争取 吴迪 于 2019-08-05 设计创作，主要内容包括：本发明涉及一种含有噁唑酰草胺和二氯喹啉酸的可分散油悬浮剂,所述可分散油悬浮剂由除草剂活性成分、分散介质、表面活性剂和乳化剂组成。本发明的含有噁唑酰草胺和二氯喹啉酸的可分散油悬浮剂,采用特定的配方制备而成,可以减少农药活性成分使用量,提高防治效果,对作物安全,值得推广应用。(The invention relates to a dispersible oil suspending agent containing metamifop and quinclorac, which consists of herbicide active ingredients, a dispersion medium, a surfactant and an emulsifier. The dispersible oil suspending agent containing metamifop and quinclorac is prepared by adopting a specific formula, can reduce the usage amount of pesticide active ingredients, improves the control effect, is safe to crops, and is worthy of popularization and application.)

1. A herbicide composition containing metamifop and quinclorac is characterized in that the weight percentage of the metamifop in the dispersible oil suspending agent is 2-8%, and the weight percentage of the quinclorac is 4-12%.

2. The herbicidal composition according to claim 1, wherein the herbicidal composition is in the form of a dispersible oil-suspendable agent.

3. A herbicidal composition according to claim 2, characterized in that, in addition to the active ingredient, the remainder are auxiliary ingredients in the processing of the pesticide dispersible oil suspension, including but not limited to dispersion media, surfactants, emulsifiers.

4. A herbicidal composition according to claim 3, wherein the dispersion medium is selected from one or more of vegetable oil, mineral oil, turpentine, methyl benzoate, methyl oleate, butyl oleate.

5. A herbicidal composition according to claim 3, wherein the surfactant comprises at least one emulsifier and other adjuvants selected from the group consisting of fatty alcohol polyoxyethylene ether, polyethylene glycol monooleate, sorbitol polyoxyethylene ether, castor oil polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, tristyrylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene polyoxypropylene ether phosphate and formaldehyde condensate, white carbon black, polyvinyl alcohol, organobentonite, magnesium aluminum silicate and xanthan gum.

6. A herbicidal composition according to claim 5, characterized in that the adjuvant is preferably a combination of white carbon black, organobentonite and tristyrylphenol polyoxyethylene ether phosphate, and the emulsifier is preferably a combination of fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether.

7. A herbicide composition as claimed in claim 6, wherein the adjuvant is white carbon black, organic bentonite and tristyrylphenol polyoxyethylene ether phosphate at a weight ratio of 25:12: 26.

8. A herbicidal composition according to claim 6, characterized in that the weight ratio of the emulsifier fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether is 31: 51.

9. A herbicidal composition according to claim 2, characterized in that the composition of the herbicidal composition is as follows:

10. use of the herbicide composition according to claim 9 for controlling weeds in paddy fields.

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a dispersible oil suspending agent containing metamifop and quinclorac, in particular to a dispersible oil suspending agent containing metamifop and quinclorac.

Background

Metamifop, the common name of IOS is metamifop, is an aryloxy phenoxy propionate herbicide developed by Korean institute of chemical and technology, can well prevent and kill most annual grassy weeds, is different from most of the herbicides, is safe to sleep, can effectively prevent and kill the main weeds in paddy fields, such as barnyard grass, moleplant seed, large crabgrass and eleusine indica, and is mainly used for weeding in transplanted and direct-seeded paddy fields. Low toxicity, environment safety and wide application foreground. The metamifop belongs to ACCase inhibitors and can inhibit the synthesis of plant fatty acids. Within a few days after the application of the pesticide, the sensitive varieties have the appearance of leaf surface greening and growth inhibition, and some varieties are withered and even die after 2 weeks after the pesticide is applied.

Quinclorac, a common name for IOS, is a class of quinolinic herbicides developed by BASF and known by the chemical name 3, 7-dichloro-8-quinolinecarboxylic acid. The quinclorac is a specific selective herbicide for preventing and controlling barnyard grass in paddy fields, has outstanding effect on the barnyard grass in the 4-7 leaf stage, continuously and independently uses quinclorac for years in China, continuously enhances the resistance of weeds, and is difficult to effectively control the generation of farmland weeds even if the application amount is continuously increased. It has been reported that quinclorac is applied to corn fields, and the larger the leaf age of corn, the safer the application.

The metamifop belongs to aryloxy phenoxy propionate herbicides, the quinclorac belongs to rapid quinolinic acid herbicides, the action mechanisms of the two agents are different, the compounding is favorable for overcoming and delaying the development of drug resistance of weeds, the weeding spectrum is expanded, and the control effect is improved.

Disclosure of Invention

The invention aims to provide a dispersible oil suspending agent containing metamifop and quinclorac, which has good stability, high efficiency and wide application aiming at the defects of the prior art.

The invention also aims to provide application of the dispersible oil suspending agent containing metamifop and quinclorac, and the dispersible oil suspending agent has stable quality, can effectively improve weeding efficiency, and is environment-friendly and safe.

In order to achieve the purpose, the invention adopts the following technical scheme:

a dispersible oil suspension containing metamifop and quinclorac, wherein the weight percentage of the metamifop in the dispersible oil suspension is 2-8%, and the weight percentage of the quinclorac is 4-12%, preferably, the weight ratio of the metamifop to the quinclorac is 6:9, and most preferably, the weight percentage of the metamifop and the quinclorac in the dispersible oil suspension is 6% and 9% respectively.

Further, the dispersible oil suspending agent is composed of auxiliary components in the processing of the pesticide dispersible oil suspending agent except for effective components, and the auxiliary components include but are not limited to a dispersing medium, a surfactant and an emulsifier.

Further, the dispersion medium is one or more selected from vegetable oil, mineral oil, turpentine, methyl benzoate, methyl oleate and butyl oleate.

Further, the dispersion medium is particularly preferably methyl oleate.

Further, the surfactant at least comprises an emulsifier and other auxiliary agents, and is selected from one or more of fatty alcohol polyoxyethylene ether, polyethylene glycol monooleate, sorbitol polyoxyethylene ether, castor oil polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, tristyrylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene polyoxypropylene ether phosphate, formaldehyde condensation compound, white carbon black, polyvinyl alcohol, organic bentonite, magnesium aluminum silicate and xanthan gum.

Further, the auxiliary agent is especially selected from the combination of white carbon black, organic bentonite and tristyrylphenol polyoxyethylene ether phosphate, and the emulsifier is especially preferably the combination of fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether.

Further, the weight part ratio of the auxiliary agent white carbon black, the organic bentonite and the tristyrylphenol polyoxyethylene ether phosphate is 25:12: 26.

Further, the weight ratio of the fatty alcohol-polyoxyethylene ether to the castor oil-polyoxyethylene ether as the emulsifier is 31: 51.

Further, the dispersible oil suspending agent has the following process:

firstly putting the solvent, the auxiliary agent and the emulsifier into a stirring kettle in proportion, stirring, then putting the raw medicines in proportion, shearing and uniformly mixing, sanding in a sand mill, sanding again after stirring, inspecting after secondary mixing, packaging and warehousing after inspection.

Furthermore, the pesticide active ingredients and/or auxiliary ingredients required by the invention can be purchased in the market, wherein the metamifop original drug is provided by Jiangsu Fuding chemical Co., Ltd, the content is 96%, and the registration number is PD 20181298; the quinclorac is provided by Jiangsu province hormone research institute, the content is 90 percent, and the registration number is PD 20081126.

Further, referring to fig. 1, the most preferred formulation process of the dispersible oil suspension of the present invention is shown.

The production process of the dispersible oil suspending agent comprises the following steps:

1. feeding according to the principle of first liquid and then solid;

2. stirring, premixing, and stirring for about 1h to fully mix the materials;

3. fully mixing and starting sanding, wherein the step is a key control point and the suspension rate is required to meet the standard requirement;

4. the sanded semi-finished product is beaten into a finished product kettle, and is circularly stirred for 1 hour;

5. after stirring and circulating fully, inspecting, and requiring that the metamifop, the quinclorac, the water, the pouring property, the wet sieve test, the dispersion stability and the lasting foamability are qualified;

6. analyzing and detecting qualified split charging, and reworking for re-processing after unqualified split charging;

7. measuring, detecting, packaging, reworking and reworking, wherein the qualified products are subjected to measurement and detection, and reworked again after unqualified products are subjected to reworking and reworking, and the reworked products are key control points;

8. the key points are analysis monitoring points, sampling analysis is needed, the qualified product enters the next procedure, and the unqualified product is reworked.

Compared with the prior art, the dispersible oil suspending agent containing metamifop and quinclorac has the beneficial effects that:

1. the dispersible oil suspending agent of metamifop and quinclorac has stable quality and good suspension rate;

2. the dispersible oil suspending agent of metamifop and quinclorac has low decomposition rate and long drug effect time;

3. the dispersible oil suspending agent of metamifop and quinclorac has high herbicidal activity under the same dosage, can reduce the dosage of active ingredients of pesticides, improve the control effect, reduce the permanent times and reduce the labor cost.

Fig. 1 is a process flow diagram of a dispersible oil suspending agent.

Detailed Description

The present invention is described in more detail below with reference to examples, which are not to be construed as limiting the invention, but rather are intended to be modified or supplemented by various modifications, equivalents and alternatives which may be employed by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

First, preparation examples

1. Example 1: 15% metamifop-quinclorac dispersible oil suspending agent (6+9)

The preparation method of the dispersible oil suspending agent comprises the following steps: firstly, proportionally adding methyl oleate, auxiliaries (white carbon black, organic bentonite and sorbitan fatty acid ester polyoxyethylene ether) and emulsifiers (polyethylene glycol monooleate and castor oil polyoxyethylene ether) into a stirring kettle for stirring, proportionally adding the original medicines of the metamifop and the quinclorac, then shearing and uniformly mixing, then, sending into a sand mill for sanding, stirring, sanding again, mixing again, inspecting, packaging after inspection, and warehousing.

2. Example 2 dispersible oil suspension of 15% Oxazolecarboxamide Quinclorac (6+9)

The preparation method of the dispersible oil suspending agent comprises the following steps: firstly, proportionally adding methyl oleate, an auxiliary agent (white carbon black, organobentonite, tristyrylphenol polyoxyethylene ether phosphate) and an emulsifier (fatty alcohol polyoxyethylene ether and castor oil polyoxyethylene ether) into a stirring kettle for stirring, proportionally adding the original medicines of the metamifop and the quinclorac, shearing and uniformly mixing, then, sending into a sand mill for sanding, stirring, sanding again, mixing again, inspecting, packaging after inspection, and warehousing.

3. Example 3: 15% metamifop-quinclorac dispersible oil suspending agent (5+10)

The dispersible oil suspension was prepared in the same manner as in example 2.

4. Comparative example 1: 15% metamifop-quinclorac dispersible oil suspending agent (6+9)

The preparation method comprises the following steps: firstly, mineral oil, an auxiliary agent (xanthan gum and fatty amide N-methyl taurine sodium salt) and an emulsifier (diphenylphenol polyoxyethylene polyoxypropylene ether and castor oil polyoxyethylene ether) are put into a stirring kettle in proportion and stirred, then the original drugs of the metamifop and the quinclorac are put into the stirring kettle in proportion and are sheared and uniformly mixed, the mixture enters a sand mill for sand milling, the sand mill is carried out again after the stirring, the mixed materials are sent for inspection after being mixed again, and the packaged materials are put into storage after the inspection is qualified.

The method for measuring the quality control indexes of the metamifop and the quinclorac comprises the following steps:

1. measurement of suspension percentage: according to 4.2 in GB/T14825-2006;

2. pourability test: according to GB/T31737;

3. dispersion stability test: preparing dispersion liquid according to a specified concentration, respectively placing the dispersion liquid into two graduated emulsification tubes, standing for a period of time vertically, inverting the emulsification tubes for several times, and observing the dispersibility of the dispersion liquid after initial standing for a period of time and redispersion;

4. low-temperature stability test: according to 2.2 in GB/T19137-;

5. heat storage stability test: according to 2.1 in GB/T19136-.

TABLE 1 Low temperature stability test

TABLE 2 Heat storage stability test

Third, field drug effect test

1. The test name is: 15% of metamifop-quinclorac dispersible oil suspending agent for preventing and controlling annual gramineous weeds in rice direct seeding fields;

2. and (3) test crops: directly seeding a paddy field;

3. the control object is: annual grassy weeds;

4. selection of crops and cultivars: the crop is rice, the variety is Tianyou 998, and the cultivation mode is direct seeding;

5. selection of weeds for test subjects: the grassy weeds in the test field are moleplant seeds and barnyard grass, the density of the weeds is higher, and the distribution is more uniform;

6. the cultivation conditions are as follows: the soil is clay loam, the soil quality is good, the fertility is higher, the organic matter content is higher, the previous crop is rice, the previous rice uses the weedicide, but has no phytotoxicity influence on the rice of the present crop;

7. other conditions are as follows: the test is arranged in the rural double-pond village on the continents of camphor trees in Jiangxi province, belongs to a plain continuous traditional rice production area, has good soil conditions and convenient drainage and irrigation, and has uniform and consistent field surface tillage and raking evidences and cultivation and water and fertilizer management conditions in all test districts and is actually consistent with the local agricultural production.

8. Test agents: the dispersible oil suspending agents of examples 1-3 and comparative example 1 were subjected to blank control treatment;

9. the application method comprises the following steps: spraying stem and leaf, draining water in the field one day before pesticide application, and spraying pesticide with sprayer of Linong HD400 knapsack type and operating pressure of 5 kg/cm²The spray rate was 1500 ml/min.

10. Investigation time: investigation is carried out once in 15 days and 30 days after the medicine is taken;

11. the investigation method comprises the following steps: randomly selecting 4 points per cell, investigating 0.25m per point²Investigation of 1m in total². The number of the survival weed plants is investigated 15 days after the pesticide application, and the control effect of the plants is calculated. And (3) surveying the number of the survival weed plants 30 days after the application of the herbicide, calculating the control effect of the plants, pulling out the weeds in the sampling points, respectively weighing the fresh weight, and calculating the control effect of the fresh weight of the weeds. 12. Yield and quality of the crop: after the rice is mature, the yield is measured in a district.

Ck pt is the blank area, the number of the weed plants or the fresh weight or the yield after the application of the herbicide in the application area.

TABLE 3 control and yield increase of weeds in rice fields by different chemical treatments

As can be seen from Table 2, the control effect of the dispersible oil suspending agent of the invention on barnyard grass and moleplant seed in the paddy field is obviously better than that of the comparative example 1, especially the dispersible oil suspending agent of the example 2, the formula is reasonable, the lasting period is long, and the yield increasing effect is better than that of other treatments. In addition, no pesticide damage of the pesticide preparation to rice is found in the application range, which shows that the pesticide dispersible oil suspending agent is safe to crops and is worthy of popularization and application in production.