阅读说明：本技术 一种含有芸苔素内酯类化合物与pcmx、灭生性除草剂的速效增效除草组合物 (Quick-acting synergistic herbicidal composition containing brassinolide compound, PCMX and sterilant herbicide ) 是由 李志江 林建海 楚娟娟 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种含有芸苔素内酯类化合物与PCMX、灭生性除草剂的速效增效除草组合物,其有效成分为芸苔素内酯类化合物、PCMX和灭生性除草剂；所述的芸苔素内酯类化合物为芸苔素内酯类化合物,其质量百分比为0.0001％-1％；所述的PCMX为1.0％-30.0％PCMX,所述的灭生性除草剂为灭生性除草剂,所述灭生性除草剂是敌草快、草甘膦、草铵膦等中的一种,其质量百分比为19-59％,剩余为常规助剂、溶剂、软化水或填料等辅料成分。所述各组分协同作用明显：(1)见效快。各杂草组分在0.5-6.0h出现速效急性中毒症状。(2)死草彻底。芸苔素内酯类化合物和PCMX复配触杀型灭生性除草剂,杂草可提早0.5-1.0d彻底死亡；芸苔素内酯类化合物和PCMX复配内吸型灭生性除草剂,杂草可提早2.0-4.0d彻底死亡。(3)提高防效。对报道的常见抗性杂草的防效提高了5-10％。(The invention discloses a quick-acting synergistic herbicidal composition containing a brassinolide compound, PCMX and a sterilant herbicide, wherein the active ingredients of the composition are the brassinolide compound, the PCMX and the sterilant herbicide; the brassinolide compound is 0.0001-1 wt%; the PCMX is 1.0-30.0% of PCMX, the biocidal herbicide is a biocidal herbicide, the biocidal herbicide is one of diquat, glyphosate, glufosinate and the like, the mass percent of the biocidal herbicide is 19-59%, and the balance is auxiliary material components such as conventional additives, solvents, softened water or fillers. The components have obvious synergistic effect: (1) has quick response. Quick-acting acute poisoning symptoms appear in 0.5-6.0h of each weed component. (2) The dead grass is thorough. The brassinolide compound and PCMX are compounded into a contact type biocidal herbicide, so that weeds can die 0.5-1.0d in advance; the brassinolide compound and the PCMX are compounded into the systemic type sterilant herbicide, and weeds can die 2.0-4.0 days in advance. (3) The control effect is improved. The control effect on the reported common resistant weeds is improved by 5-10%.)

1. A quick-acting synergistic herbicidal composition containing brassinolide compounds, PCMX and biocidal herbicide is characterized in that: the active ingredients are brassinolide compound, PCMX and sterilant herbicide; the brassinolide compound comprises, by mass, 0.0001-1% of the brassinolide compound, 1-30% of the PCMX, 19-59% of the biocidal herbicide and the balance of auxiliary components.

2. The quick-acting synergistic herbicidal composition containing a brassinolide compound and PCMX, a biocidal herbicide according to claim 1, wherein:

the brassinolide is composed of one or more of 24-epibrassinolide, 28-homobrassinolide, mixotrope brassinolide, 25-methyl brassinolide, propionyl brassinolide and 14-hydroxy brassinosteroid;

the PCMX is parachlorometaxylenol.

3. The quick-acting synergistic herbicidal composition containing a brassinolide compound and PCMX, a biocidal herbicide according to claim 2, wherein:

the biocidal herbicide is one of diquat, glyphosate and glufosinate.

4. The quick-acting synergistic herbicidal composition containing a brassinolide compound and PCMX, a biocidal herbicide according to claim 1, wherein: the auxiliary components comprise an auxiliary agent, and the balance of solvent, softened water or filler.

5. The quick-acting synergistic herbicidal composition containing a brassinolide compound and PCMX, a biocidal herbicide according to claim 2, wherein: the auxiliary agent comprises one or more of a dispersing agent, a wetting agent, a dispersing agent, a disintegrating agent and a binder.

6. The quick-acting synergistic herbicidal composition containing a brassinolide compound in combination with PCMX, a biocidal herbicide according to claim 3, wherein:

the dispersing agent is selected from one or more of the following substances: acrylic acid homopolymer salt, methylene dinaphthalene sodium sulfonate, acrylic acid copolymer salt, methylene dinaphthalene sodium sulfonate, naphthalene sulfonate formaldehyde condensate, sodium lignin sulfonate and calcium lignin sulfonate;

the wetting agent is selected from one or more of the following substances: sodium dodecyl sulfate, sodium dialkyl benzene sulfonate and fatty alcohol-polyoxyethylene ether;

the disintegrant is selected from at least one of the following substances: starch, polyvinylpyrrolidone, potassium sulfate, ammonium sulfate, anhydrous sodium sulfate, sodium chloride, sodium carboxymethyl starch, magnesium chloride and sodium carboxymethyl cellulose.

The binder is selected from at least one of the following substances: starch and its derivatives, dextrin, polyvinyl alcohol, sodium carboxymethylcellulose, hydroxypropyl cellulose, polyethylene glycol;

the filler is selected from at least one of the following substances: talcum powder, bentonite, activated clay, white carbon black, glucose, cane sugar, starch, diatomite, attapulgite, argil and kaolin.

7. The quick-acting synergistic herbicidal composition containing a brassinolide compound and PCMX, a biocidal herbicide according to claim 4, wherein: the weeding composition can also be prepared into water aqua, missible oil, wettable powder, water dispersible granules, suspending agent, tablets or effervescent granule commercial preparations.

Technical Field

The invention belongs to the technical field of biological pesticides, and particularly relates to a quick-acting synergistic herbicidal composition containing a brassinolide compound, PCMX and a sterilant herbicide.

Background

Chemical weeding is one of the major means of controlling weeds in agriculture. In recent years, the single use of several herbicide species over large areas has led to the development of resistance in many weeds. Meanwhile, the weed phase is complex when the weeds occur, various weeds such as gramineous weeds, broadleaf weeds and cyperaceous weeds are mixed, the harm of various mixed weeds is difficult to control by using a certain herbicide singly, and particularly the control of resistant weeds is more and more difficult. Therefore, the screening of the pesticide formula draws more and more attention of people, and the weeding composition has the advantages of wide weeding spectrum, improvement of weeding effect, retardation of weed drug resistance, time saving, labor saving and the like. By screening the pesticide formula, the actual control effect can be effectively improved, the dosage is reduced, the cost is reduced, and the generation of the drug resistance of the weeds is delayed, so that the method is an important means for agricultural comprehensive treatment.

The brassinolide compound is a novel sterol plant endogenous hormone, and the compound herbicide can play an obvious synergistic weeding role. If the herbicide is applied alone, the metabolism of weeds is slow and the absorption and conduction of the herbicide are slow when the herbicide is in a low-temperature environment, and the weeding effect is greatly reduced. The brassinolide is used in combination with herbicide to improve the metabolic level of weeds and improve the weeding effect.

PCMX, 4-chloro-3, 5-dimethylphenol, alternative names: 3, 5-dimethyl-4-chloro-phenol or p-chloro-m-xylenol having the formula C₈H₉ClO. According to screening experiments of pesticide formulas, the PCMX can cause most weed components to generate acute poisoning reactions, particularly common weeds in rice fields such as barnyard grass and monochoria vaginalis. Moreover, the greater the acute toxic response of weeds with increasing acre of PCMX.

Diquat, a contact biocidal herbicide, can be rapidly absorbed by green plant tissues and rapidly loses activity after contacting with soil. The compound herbicide is used for weeding in fields, orchards, uncultivated areas, before harvesting and the like, and can also be used for accelerating withering of stems and leaves of potatoes and sweet potatoes.

Glyphosate is a non-selective and residue-free biocidal herbicide, is very effective on perennial rooting weeds, and is widely used in rubber, mulberry, tea, orchards and sugarcane fields. Mainly inhibits enol pyruvyl shikimic acid phosphate synthetase in plants, thereby inhibiting the conversion of shikimic acid to phenylalanine, tyrosine and tryptophan, interfering protein synthesis and leading to plant death. Glyphosate is absorbed by stems and leaves and then transferred to various parts of plants, and can prevent and kill monocotyledons, dicotyledons, annual and perennial plants, herbaceous plants, shrubs and other plants of more than 40 families. After entering the soil, the glyphosate is combined with metal ions such as iron, aluminum and the like quickly to lose activity. Can prevent and kill off weeds in apple orchard, peach orchard, vineyard, pear orchard, tea garden, mulberry orchard and farmland fallow land, and annual weeds of barnyard grass, green bristlegrass, alopecurus, goosegrass, crabgrass, xanthium sibiricum, chenopodium album, chickweed, cleavers and the like.

The glufosinate-ammonium has the characteristics of wide herbicidal spectrum, low toxicity, high activity, good environmental compatibility and the like, has the speed of exerting the activity action slower than that of the paraquat and better than that of the glyphosate, becomes a non-selective herbicide coexisting with the glyphosate and the paraquat, and has wide application prospect. Many weeds are sensitive to glufosinate and can be used as a substitute for glyphosate in areas where glyphosate is resistant. The glufosinate-ammonium has high weed killing speed, stops growing within 1 day, has the symptoms of green loss, necrosis and the like within 2-3 days, and withers and dies in the whole plant within 1-2 weeks. Meanwhile, the action of the glufosinate-ammonium can last for 25-45 days, and the weed control time is longer than that of other herbicides.

At present, the single use of any one biocidal herbicide cannot completely and effectively control the occurrence of weeds in non-cultivated land or citrus orchard, especially the control aspect of resistant weeds. In the field of production of pesticide preparations, no report is available on preparation of herbicides by combining brassinolide compounds, PCMX and biocidal herbicides.

Disclosure of Invention

In order to solve the existing problems, the invention discloses a quick-acting synergistic herbicidal composition containing a brassinolide compound, PCMX and a sterilant herbicide, wherein the active ingredients of the composition are the brassinolide compound, the PCMX and the sterilant herbicide; the brassinolide compound accounts for 0.0001-1 wt%, the component B accounts for 1-30 wt%, the component C accounts for 19-59 wt%, and the balance is auxiliary components;

the brassinolide compound is composed of one or more of 24-epibrassinolide, 28-homobrassinolide, mixotrope brassinolide, 25-methyl brassinolide, propionyl brassinolide and 14-hydroxy brassinosteroid;

the PCMX is parachlorometaxylenol.

The biocidal herbicide is one of diquat, glyphosate, glufosinate and the like.

Preferably, the auxiliary component comprises an auxiliary agent, and the balance is a solvent, softened water or a filler, or a combination of the solvent and the softened water.

Preferably, the auxiliary agent comprises one or more of a dispersant, a wetting agent, a dispersing agent, a disintegrating agent and a binder.

Preferably, the dispersant is selected from one or more of the following substances: acrylic acid homopolymer salt, methylene dinaphthalene sodium sulfonate, acrylic acid copolymer salt, methylene dinaphthalene sodium sulfonate, naphthalene sulfonate formaldehyde condensate, sodium lignin sulfonate and calcium lignin sulfonate;

the wetting agent is selected from one or more of the following substances: sodium dodecyl sulfate, sodium dialkyl benzene sulfonate and fatty alcohol-polyoxyethylene ether;

the disintegrant is selected from at least one of the following substances: starch, polyvinylpyrrolidone, potassium sulfate, ammonium sulfate, anhydrous sodium sulfate, sodium chloride, sodium carboxymethyl starch, magnesium chloride and sodium carboxymethyl cellulose.

The binder is selected from at least one of the following substances: starch and its derivatives, dextrin, polyvinyl alcohol, sodium carboxymethylcellulose, hydroxypropyl cellulose, polyethylene glycol;

preferably, the filler is selected from at least one of the following: talcum powder, bentonite, activated clay, white carbon black, glucose, cane sugar, starch, diatomite, attapulgite, argil and kaolin.

Preferably, the weeding composition can also be prepared into water aqua, missible oil, wettable powder, water dispersible granules, suspending agent, tablets or effervescent granules.

The invention has the beneficial effects that: the quick-acting synergistic weeding composition of the brassinolide compound, PCMX and the sterilant herbicide has obvious synergistic effect of the components: (1) has quick response. Quick-acting acute poisoning symptoms appear in 0.5-6.0h of each weed component. (2) The dead grass is thorough. The brassinolide compound and PCMX are compounded into a contact type biocidal herbicide, so that weeds can die 0.5-1.0d in advance; the brassinolide compound and the PCMX are compounded into the systemic type sterilant herbicide, and weeds can die 2.0-4.0 days in advance. (3) The control effect is improved. The control effect on the reported common resistant weeds is improved by 5-10%.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention is further described below in conjunction with examples, which are to be understood as being illustrative only and in no way limiting.

The quick-acting synergistic weeding composition containing the brassinolide compound, PCMX and the sterilant herbicide can be prepared into different formulations such as missible oil, wettable powder, water dispersible granules, suspending agents, tablets or effervescent granules and other commodity preparations by adding an auxiliary agent and a special processing technology according to different purposes and use environments.

Example 1

Compounding 20.0001% of missible oil: weighing 0.0001 percent of 24-epibrassinolide, 19 percent of diquat, 1 percent of PCMX, 6 percent of fatty alcohol-polyoxyethylene ether, 6 percent of sodium dialkyl benzene sulfonate and solvent oil in percentage by mass, and complementing the solvent oil to 100 percent.

Example 2

Compounding 34.001% of a suspending agent: weighing 0.001% of 14-hydroxyl brassinosterol, 29% of glyphosate ammonium salt, 5% of PCMX, 4% of acrylic acid homopolymer salt, 2% of potassium sulfate, 3.5% of sodium carboxymethyl starch, 2.5% of polyethylene glycol, 2.5% of hydroxypropyl cellulose and water in balance to 100%.

Example 3

Compounding 40.01% of water dispersible granules: weighing 0.01 percent of propionyl brassinolide, 39 percent of glyphosate ammonium salt, 10 percent of PCMX, 5 percent of fatty alcohol-polyoxyethylene ether, 5 percent of lauryl sodium sulfate, bentonite, kaolin and white carbon black according to the mass percent, and complementing the mass percent to 100 percent.

Example 4

Compounding 69.10% of wettable powder: weighing 0.1% of mixepibrassinolide, 49% of glufosinate-ammonium, 20% of PCMX, 5% of sodium dialkyl benzene sulfonate, bentonite and white carbon black according to the mass percentage, and complementing the mixture to 100%.

Example 5

Compounding 90.0% of effervescent granules: weighing 1.0% of 28-epibrassinolide, 59% of glufosinate-ammonium, 30% of PCMX, 3% of sodium dodecyl sulfate, 2% of polyethylene glycol, 1.5% of magnesium chloride, 1.5% of acrylic acid homopolymer salt, activated clay and white carbon black according to the mass percentage, and supplementing to 100%.

Comparative example 1: the comparative example uses a 20% diquat aqueous solution.

Comparative example 2: this comparative example used 50.0% soluble ammonium glyphosate powder.

Comparative example 3: this comparative example employed 40.0% glufosinate soluble granules.

Clear water was used as a blank control.

The method for evaluating the performance of examples 1, 2, 4, comparative examples 1, 2, 3 and the blank control group is as follows:

experimental site I case: the test is carried out in a non-cultivated land of dam Zhenggao village in a Pu Tian Xiu area, conventional field management is carried out before and after application of pesticide, and main weeds in the test field are alternanthera philoxeroides, ageratum and sweet wormwood herb which grow naturally and are distributed uniformly.

The method for evaluating the performance of examples 1, 3, 5, comparative examples 1, 2, 3 and the blank control group is as follows:

test site II case: the test is carried out in a citrus field of Wujiafang in south Chang city in Jiangxi, and conventional field management is carried out before and after application of the herbicide, wherein the main weeds in the test field are erigeron breviscapus, Shandong Tang and Xanthium sibiricum which all grow naturally and are distributed uniformly.

And (3) test treatment: the test was co-administered once, with 3 treatments per sample, 2 replicates per treatment, and arranged in random blocks. The pesticide applying device is a knapsack manual sprayer and a fan-shaped spray head, the spraying amount is 300-.

Survey content:

after application, the time to onset of significant phytotoxicity and time to complete death of each weed component were investigated.

After application, the weed death and survival rate were investigated and the control effect was calculated 7 and 14 days after application, respectively. The plant control effect is (weed number in the blank control area-weed number in the treatment area)/weed number in the blank control area multiplied by 100%. The test values are shown in tables 1 and 2.

TABLE 1 application test values of examples 1, 2 and 4 and comparative examples 1, 2 and 3 and blank control group in non-cultivated land

As can be seen from table 1, the herbicidal combination of the present invention has significant synergistic effect of the components: the weed components of examples 1, 2 and 4 showed significant acute toxicity symptoms at 0.5-6.0h, while the weed components of comparative examples 1, 2 and 3 showed significant toxicity symptoms at 12h, 3d and 2 d; comparing example 1 with comparative example 1, it was found that the time of complete death of the poisoned weeds of brassinolide and PCMX compound diquat (contact type biocidal herbicide) was 0.5-1.0d earlier; comparing example 2 with comparative example 2, it is found that the death of brassinolide and PCMX compound glyphosate (systemic sterilant herbicide) is improved by 2.0-4.0 days thoroughly; comparing example 4 with comparative example 3, it is found that brassinolide and PCMX compound glufosinate (systemic biocidal herbicide) die thoroughly 2.0-4.0 days earlier; compared with comparative examples 1, 2 and 3, the control effect of examples 1, 2 and 4 on common resistant weeds (alternanthera philoxeroides, ageratum conyzoides and artemisia annua) is improved by 5-10% in 7d or 14 d.

Table 2 application test values of examples 1, 3, 5 and comparative examples 1, 2, 3 in citrus fields

As can be seen from table 2, the synergistic effect of each component of the herbicidal composition of the present invention is significant: the weed components of examples 1, 3 and 5 showed significant acute toxicity symptoms at 0.5-6.0h, while the weed components of comparative examples 1, 2 and 3 showed significant toxicity symptoms at 12h, 3d and 3 d; comparing example 1 with comparative example 1, it was found that the time of complete death of the poisoned weeds of brassinolide and PCMX compound diquat (contact type biocidal herbicide) was 1-2.0d earlier; comparing example 3 with comparative example 2, it is found that the death of brassinolide and PCMX compound glyphosate (systemic sterilant herbicide) is improved by 2.0-3.0 days thoroughly; comparing example 5 with comparative example 3, it is found that brassinolide and PCMX compound glufosinate (systemic biocidal herbicide) die thoroughly 2.0-3.0 days earlier; compared with comparative examples 1, 2 and 3, the control effect of examples 1, 3 and 5 on common resistant weeds (erigeron breviscapus, crab grass and xanthium sibiricum) is improved by 5-10% in 7d or 14 d.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations are possible to those skilled in the art in light of the above teachings, and that all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.