阅读说明：本技术 一种含禾草丹和敌稗的新型悬浮剂 (Novel suspending agent containing benthia grass and propanil ) 是由 张连松 柴方堃 贾成国 李楠 陈海涛 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种含禾草丹和敌稗的新型悬浮剂,以禾草丹和敌稗为主要有效成分,增加生物调节剂——芸台素内酯,并在添加前用十八烯酸钠将其配制成芸台素内酯溶液,通过乳液聚合反应将芸台素内酯与敌稗、禾草丹连接在一起,从而制备含禾草丹和敌稗的新型悬浮剂,本发明得到的悬浮剂不仅制备简单,储藏稳定性极佳,而且能够高效防治抗性稗草、抗性千金子等禾本科杂草、阔叶杂草,这种新型悬浮剂可有效提高除草效果而且降低除草次数,节约生产成本,促进水稻生长,为水稻增产、农民增收奠定基础。(The invention discloses a novel suspending agent containing thiobencarb and propanil, which takes the thiobencarb and propanil as main active ingredients, increases a biological regulator-brassinolide, prepares a brassinolide solution by using sodium octadecenoate before adding, and connects the brassinolide with the propanil and the propanil through emulsion polymerization reaction, thereby preparing the novel suspending agent containing the thiobencarb and propanil.)

1. A novel suspending agent containing benthia grass and propanil is characterized in that: the suspending agent is prepared from the following main active ingredients, namely the benthia henryi and the propanil, and the auxiliary ingredients are brassinolide and an auxiliary agent, wherein the mass percentage of the benthia henryi to the weight percentage of the propanil is 1-2: 1 to 2.

2. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 1, wherein: before the addition of the brassinolide, sodium octadecenoate is used for emulsifying the brassinolide and preparing the brassinolide into a brassinolide solution.

3. A novel suspension concentrate containing benthia grass and propanil as claimed in claim 2, wherein: the brassinolide solution is a solution prepared from water, sodium octadecenoate and brassinolide in any proportion.

4. A novel suspension concentrate containing benthia grass and propanil as claimed in claim 3, wherein: the mass fraction of the brassinolide solution in the suspending agent is 0.002% -0.003%.

5. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 1, wherein: the total mass fraction of the benthia grass and the propanil in the suspending agent is 50-70%.

6. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 1, wherein: the auxiliary agent comprises 4-5% of jicao tincture, 4% of emulsifier, 0.1% of initiator, 5% of cosolvent, 0.8% of stabilizer and 100% of diluent.

7. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 6, wherein: the emulsifier is one or two of sodium octadecenoate, sodium p-styrene sulfonate, calcium dodecyl benzene sulfonate, alkylphenol ethoxylates, fatty alcohol-polyoxyethylene ether and stearic acid-polyoxyethylene ester; the initiator is ammonium persulfate; the cosolvent is any one of ethanol, isooctanol and urea; the stabilizer is magnesium aluminum silicate; the diluent is water.

8. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 7, wherein: the preparation method of the suspending agent is an emulsion polymerization method, and the suspending agent is obtained by weighing the components according to the weight ratio, mixing, dispersing for 30-60 min by using a high-speed shearing machine, heating to 40-60 ℃, reacting for 4-8 h, and then ball-milling for 1-4 h by using a ball mill.

9. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 8, wherein: the particle size of the suspending agent is controlled to be in a nanometer level.

10. The novel suspending agent containing the benthia grass and the propanil as claimed in claim 1, wherein: the suspending agent is in the form of aqueous suspending agent.

Technical Field

The invention relates to a novel suspending agent containing thiobencarb and propanil, belonging to the technical field of pesticides.

Background

The rice is not only the most important grain crop in China, but also one of the main grain crops in the world, and the rice production is spread in all continents except Antarctic. A large amount of weeds grow in rice fields in all rice growing areas of China all the time, and as much as 200 hundred million kilograms of grains are lost due to the weeds every year in China, so that the proportion of the herbicides used in the rice fields almost reaches 100 percent.

The bentazone is insoluble in water and soluble in organic solvent, is a systemic conduction selective herbicide, is mainly absorbed by the roots and the buds of weeds, and has a strong inhibiting effect on growing points. Propanil is a contact herbicide with high amide selectivity, is mainly used in rice seedling fields or direct seeding fields, is a specific drug for preventing and killing propanil, and can also be used for preventing and killing other various graminaceous and dicotyledonous weeds, such as monochoria vaginalis, cress, crabgrass, green bristlegrass and the like. However, with the use of a large amount of herbicides, the resistance of weeds is stronger and stronger, the growth of rice is seriously influenced, and particularly in recent years, the resistant barnyard grass and the resistant moleplant seeds cause a large amount of yield reduction or no harvest in farmlands.

The brassinolide is a novel green environment-friendly plant growth regulator, is one of steroid compounds with higher biological activity, widely exists in a plant body, can promote vegetative growth and is beneficial to fertilization, and can be absorbed by leaves, stems and roots of the plant and then conducted to the acting parts. However, the brassinolide is not easy to disperse in the pesticide preparation, which greatly influences the efficacy of the brassinolide in the pesticide preparation.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel suspending agent containing thiobencarb and propanil, which is characterized in that through adding a biological regulator-brassinolide, preparing the brassinolide into a specific solution by using sodium octadecenoate before adding, and connecting the brassinolide, the propanil and the thiobencarb together through emulsion polymerization reaction, the particle size of a raw drug can be controlled at a nanometer level, the weeding effect is improved, the storage stability is excellent, and the stability is still stable under the condition of 5000r/30 min.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the novel suspending agent containing the benthia grass and the propanil is prepared by taking the benthia grass and the propanil as main active ingredients and simultaneously adding the brassinolide and an auxiliary agent, wherein the mass percentage of the benthia grass and the propanil is 1-2: 1 to 2.

The technical scheme of the invention is further improved as follows: before the addition of the brassinolide, sodium octadecenoate is used for emulsifying the brassinolide and preparing the brassinolide into a brassinolide solution.

The technical scheme of the invention is further improved as follows: the brassinolide solution is a solution prepared from water, sodium octadecenoate and brassinolide in any proportion.

The technical scheme of the invention is further improved as follows: the mass fraction of the brassinolide solution in the suspending agent is 0.002% -0.003%.

The technical scheme of the invention is further improved as follows: the total mass fraction of the benthia grass and the propanil in the suspending agent is 50-70%.

The technical scheme of the invention is further improved as follows: the auxiliary agent comprises 4-5% of jicao tincture, 4% of emulsifier, 0.1% of initiator, 5% of cosolvent, 0.8% of stabilizer and 100% of diluent.

The technical scheme of the invention is further improved as follows: the emulsifier is one or two of sodium octadecenoate, sodium p-styrene sulfonate, calcium dodecyl benzene sulfonate, alkylphenol ethoxylates, fatty alcohol-polyoxyethylene ether and stearic acid-polyoxyethylene ester; the initiator is ammonium persulfate; the cosolvent is any one of ethanol, isooctanol and urea; the stabilizer is magnesium aluminum silicate; the diluent is water.

The technical scheme of the invention is further improved as follows: the preparation method of the suspending agent is an emulsion polymerization method, and the suspending agent is obtained by weighing the components according to the weight ratio, mixing, dispersing for 30-60 min by using a high-speed shearing machine, heating to 40-60 ℃, reacting for 4-8 h, and then ball-milling for 1-4 h by using a ball mill.

The technical scheme of the invention is further improved as follows: the particle size of the suspending agent is controlled to be in a nanometer level.

The technical scheme of the invention is further improved as follows: the suspending agent is in the form of aqueous suspending agent.

Due to the adoption of the technical scheme, the invention has the technical progress that:

according to the invention, through adding a biological regulator, namely the brassinolide, preparing the brassinolide into a specific solution by using the sodium octadecenoate before adding, and connecting the brassinolide, the propanil and the thiobencarb together through emulsion polymerization, the particle size of a raw drug can be controlled at a nanometer level, the weeding effect is improved, the storage stability is excellent, and the stability is still stable under the condition of 5000r/30 min.

The sodium octadecenoate is a surfactant containing a hydrophobic group and a hydrophilic group, has excellent emulsifying power and penetrability, can be directly prepared into a stable aqueous solution with the brassinolide, can obviously improve the dispersion of the brassinolide when being added into a pesticide preparation, and can connect the brassinolide and the two original pesticides together through emulsion polymerization.

The emulsion polymerization reaction is that the monomer is dispersed in water by means of emulsifier and mechanical stirring to form emulsion, then initiator is added to initiate monomer polymerization, the brassinolide is emulsified by sodium octadecenoate and then coated on the surface, and when the brassinolide is added into a suspending agent system, the brassinolide and the surfactant around the molecules of the original pesticide can carry out free radical polymerization reaction, so that the two original pesticides of the brassinolide, the propanil and the thiobencarb are connected together.

The brassinolide is a novel green environment-friendly plant growth regulator, is one of steroid compounds with higher biological activity, widely exists in a plant body, can promote vegetative growth and is beneficial to fertilization, and can be absorbed by leaves, stems and roots of the plant and then conducted to the acting parts.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

a novel suspending agent containing the benthia grass and the propanil is prepared by taking the benthia grass and the propanil as main active ingredients, adding a biological regulator, namely brassinolide, preparing the brassinolide into a brassinolide solution by using sodium octadecenoate before adding, and connecting the brassinolide, the propanil and the benthia grass together through emulsion polymerization reaction.

Wherein the brassinolide solution is a solution prepared by water, sodium octadecenoate and brassinolide at any ratio.

The mass fraction of the brassinolide solution in the suspending agent is 0.002% -0.003%; the total mass fraction of the benthia henryi and the propanil in the suspending agent is 50-70%, the balance is the auxiliary agent, and the mass percentages of the benthia henryi and the propanil are 1-2: 1-2, wherein the emulsifier is one or two of sodium octadecenoate, sodium p-styrene sulfonate, calcium dodecylbenzene sulfonate, alkylphenol ethoxylates, fatty alcohol-polyoxyethylene ether and stearic acid-polyoxyethylene ester; the initiator is ammonium persulfate; the cosolvent is any one of ethanol, isooctanol and urea; the stabilizer is magnesium aluminum silicate; the diluent is water.

Weighing the components according to the weight ratio, mixing, dispersing for 30-60 min by using a high-speed shearing machine, heating to 40-60 ℃, reacting for 4-8 h, and then ball-milling for 1-4 h by using a ball mill to obtain the suspending agent.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It is to be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the invention, and all compositions are in weight percent.

Example 1: 60% of bentazon-propanil suspending agent

40% of thiobencarb, 20% of propanil, 4% -5% of molting tincture, 0.002% of brassinolide solution, 4% of sodium p-styrenesulfonate, 0.1% of ammonium persulfate, 5% of urea, 0.8% of magnesium aluminum silicate and a diluent which is supplemented to 100%.

The preparation method comprises the following steps: the raw materials are weighed according to the parts by weight, mixed, dispersed for 30min by using a high-speed shearing machine, heated to 50 ℃, reacted for 6h, and then ball-milled for 1h by using a ball mill to obtain the nano-silver-doped zinc oxide.

Example 2: 60% of bentazon-propanil suspending agent

20% of thiobencarb, 40% of propanil, 4% -5% of moleplate tincture, 0.0025% of brassinolide solution, 4% of nonylphenol polyoxyethylene ether, 0.1% of ammonium persulfate, 5% of ethanol, 1% of magnesium aluminum silicate and 100% of diluent. The preparation method is the same as example 1.

Example 3: 50% of bentazon-propanil suspending agent

30% of thiobencarb, 20% of propanil, 4% -5% of molting tincture, 0.003% of brassinolide solution, 6% of sodium octadecenoate, 0.1% of ammonium persulfate, 5% of urea, 0.8% of magnesium aluminum silicate and a diluent for supplementing to 100%. The preparation method is the same as example 1.

Comparative example 1:

commercially available 90% thiobencarb emulsifiable concentrate.

Comparative example 2:

commercial 35% propanil suspending agent.

Comparative example 3: 40% of benthiavalicarb, 20% of propanil suspending agent and brassinolide are added separately

The differences between this comparative example and example 1 are: the rutinoside lactone is not matched with sodium octadecenoate, but directly added.

Comparative example 4: 40% of thiobencarb and 20% of propanil suspending agent, without adding a brassinolide solution

The differences between this comparative example and example 1 are: no brassinolide solution was added.

Control target: resistant barnyard grass (resistant to ALS inhibitors), resistant moleplant seed (resistant to ACC inhibitors), resistant monochoria vaginalis (resistant to ALS inhibitors), resistant cyperus heterotropoides (resistant to ALS inhibitors).

The test method comprises the following steps:

1. the centrifugation test was carried out at different rotation speeds and times for 50mL of each of the examples and the comparative examples. The results are shown in Table 1.

TABLE 1 centrifuge stability of examples and comparative examples

Speed/time of rotation	3000r/30min	4000r/30min	5000r/30min	6000r/min
					Example 1	No precipitation	No precipitation	No precipitation	A small amount of precipitate
Example 2	No precipitation	No precipitation	No precipitation	No precipitation
					Example 3	No precipitation	No precipitation	No precipitation	A small amount of precipitate
Comparative example 1	No precipitation	A small amount of precipitate	Large amount of precipitate	Large amount of precipitate
					Comparative example 2	No precipitation	Large amount of precipitate	Large amount of precipitate	Large amount of precipitate
Comparative example 3	No precipitation	Large amount of precipitate	Large amount of precipitate	Large amount of precipitate
					Comparative example 4	No precipitation	No precipitation	No precipitation	A small amount of precipitate

It can be seen by centrifugation experiments that: the suspending agent obtained by the invention has better stability.

2. The experiment is carried out in a direct seeding field of japonica rice, each group is repeatedly processed for 3 times, and the processing area is 20m²Accurately weighing various medicaments according to the area of an experimental community, and carrying out spraying treatment on the rice seedlings at the 3-4 leaf stage. And counting the death condition of the weeds 30d after the herbicide is applied, and comparing the weeding activity of various agents. Wherein, the control area is: test fields without drug application; the treatment area is as follows: and (5) applying the pesticide to the experimental field.

The results are shown in Table 2.

TABLE 2 herbicidal Effect of compositions of different formulations after 30 days

3. The mixture ratio screening is carried out by applying a Colby formula, and the formula is E₀Xy/100, wherein x represents the survival rate (%) of herbicide a at the dose of P, y represents the survival rate (%) of herbicide B at the dose of Q, and E₀The theoretical weed survival rate (%) of the herbicides a + B at the doses of P + Q was expressed, and E the actual weed survival rate (%) of each experimental method. When E is₀-E>When the content is 10%, the synergistic effect is achieved; when E is₀-E<When the content is 10%, the antagonistic effect is achieved; when the two are in between, it means that the addition action is exerted. The results are shown in Table 3.

TABLE 3 indoor toxicity determination of the invention to gramineous weeds in Rice Paddy field

Experimental results show that the control effect of the novel compound herbicide on resistant weeds is obviously superior to that of other control agents. As seen from the comparison of the effects of the agents in example 1 and comparative example 3 in Table 1, the addition of sodium octadecenoate and the emulsion polymerization carried out by the sodium octadecenoate greatly enhance the herbicidal effect of the brassinolide in the herbicide.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, so that any modifications, equivalents and improvements made on the basis of the present invention are intended to be included in the scope of the present invention.