CN111066807A

CN111066807A - Herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and plant extraction auxiliary agent

Info

Publication number: CN111066807A
Application number: CN201911263308.4A
Authority: CN
Inventors: 郭海滨; 张坤; 李希若; 王敬
Original assignee: Nanjing Lvtu Biotechnology Co Ltd
Current assignee: Nanjing Lvtu Biotechnology Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-04-28

Abstract

The invention provides a herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and a plant extraction auxiliary agent, which is prepared from the following raw materials in percentage by mass: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 0.1-80: 0.1-80: 0.1-80: 0.1-80. The herbicide provided by the invention has high herbicidal activity through synergistic effect of the three herbicides, the herbicide rapidly enters plant bodies with the assistance of the plant extraction auxiliary agent and is accumulated on the parts with vigorous growth, and the growth is inhibited under the condition of illumination, so that weed tissues are finally rotted and die.

Description

Herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and plant extraction auxiliary agent

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and a plant extraction auxiliary agent.

Background

With the acceleration of the urbanization process, the promotion of urban greening standards and the great increase of urban areas in China, various lawns are produced at the same time, so that great demands on the lawns are caused, and the development of the lawn industry has good business opportunities. The lawn is an important auxiliary facility in the aspect of ensuring the firmness and the beautiful appearance of basic facilities such as roads, railways, airports, reservoirs, river banks, lake banks and the like; in the aspects of urban construction and landscaping, the lawn can greatly improve the living environment and effectively reduce the 'heat island effect' of the city; the area and quality of the green land of the lawn reflect the environmental quality and civilization degree of the city. At present, the lawn in China has been greatly developed, plays an important role in beautifying the living environment and improving the mental civilization level of people, and not only has very high economic benefit, but also has huge ecological benefit and social benefit. However, the weed control is an urgent problem to be solved in both lawn planting and urban maintenance, and particularly, the grass degradation is serious due to the massive erosion of weeds in the lawn maintenance.

The artificial weeding has the disadvantages of large investment, incomplete weeding and the disadvantage of trampling the lawn, thereby reducing the quality of the lawn. In some places, the lawn has to be replaced, which is very costly. Chemical weeding is labor-saving and time-saving, low in cost and high in efficiency, and the later-period weed generation amount is less than that of artificial weeding. Chemical weeding also has a blocking effect, and the weeds which are newly generated later are much less. The chemical weeding has little interference to the lawn and provides a reasonable environment for the growth of the lawn grass. The weeding cost is low, the one-time cost is l/3-l/4 of the labor cost, and the one-year cost is 1/4-1/5 of the labor cost. The labor intensity is low, one person can spray 7-9 mu of lawn every day, the spraying efficiency of the machine is higher, and the machine has the advantage of large-area weeding. In order to reduce economic loss caused by weed damage and reduce labor intensity, and meanwhile, because chemical weeding is convenient, quick-acting and long in control time, the chemical weeding is gradually accepted by people.

Disclosure of Invention

In view of the above, the invention aims to provide a herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and plant extraction auxiliary agent, which has the advantages of low environmental pollution, safety on lawn, wide weeding spectrum and lasting pesticide effect.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and a plant extraction auxiliary agent is prepared from the following raw materials in percentage by mass: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 0.1-80: 0.1-80: 0.1-80: 0.1-80.

Further, flazasulfuron is an acetolactate synthase (ALS) inhibitor that mainly inhibits the reaction of precursor acetolactate synthase producing side chain amino acids, leucine, isoleucine and valine; the herbicide has wide weed control spectrum, can not only excellently prevent and kill annual broad leaf weeds and gramineous weeds in the lawn, but also can prevent and kill perennial broad leaf weeds and cyperaceae weeds, such as crabgrass, barnyard grass, eleusine indica, bluegrass, alopecurus, green foxtail, cyperus rotundus, abnormal-shaped cyperus, alternanthera philoxeroides, horsetail herb, white clover, decumbent bugle, clustered white fungus, creeping oxalis, green nidus vespae, trefoil, eyebright, polygonum palustre, rumex, field brocade, plantain, mugwort, day lily, green amaranth, shepherd's purse, carex, green lettuce, chickweed, and the like, and has excellent control effect on shortleaf water centipede, crabgrass and nutgrass galingale rhizome; under the general condition of flazasulfuron, the treated weeds stop growing immediately, newly-emitted leaves are faded after being absorbed for 4-5 days, and then gradually die and spread to the whole plant for 20-30 days, and the weeds are completely died; the herbicide can be absorbed by weed stems and leaves, can inhibit weed seeds in soil from sprouting, has long control time, has an effective period of more than 40 days in spring and summer and more than 120 days in autumn and winter, can rapidly decompose and convert the herbicide into nontoxic substances after the zoysia and the cibotium turfgrass are contacted with the herbicide, cannot influence the normal growth of the lawn, and has high safety to the lawn grass. The lawn nursery sock is used in the dormancy stage of the lawn, does not influence the germination and growth in the future, and is widely applied to greening lawns, golf courses and the like.

Furthermore, the pyrazosulfuron-ethyl belongs to sulfonylurea herbicides, is a selective systemic conduction type herbicide, is absorbed mainly through root systems, is rapidly transferred in weed plants, inhibits growth, gradually dies weeds, and has a lasting period of 25-35 days; pyrazosulfuron-ethyl can prevent and kill annual and perennial broadleaf weeds and cyperaceous weeds, such as cyperus heterophyllus, cyperus esculentus, Iris lactea, monochoria vaginalis, cress, Equisetum arvense, edible tulip, Eisenia indica, duckweed and eclipta prostrata, and is ineffective on barnyard grass and moleplant seed.

Furthermore, the quinclorac is a specific selective herbicide for preventing and killing barnyard grass, belongs to hormone quinoline carboxylic acid herbicides, has similar weed poisoning symptoms to auxin effects, is mainly used for preventing and treating the barnyard grass, and has long application period, and the effective leaf period of 1-7; can also be used for preventing and treating chronic flower of Lonicera Japonica flos, herba Oenanthes Javanicae, herba Monochasmatis, and fructus Gleditsiae Abnormalis.

Further, the mass ratio of flazasulfuron to pyrazosulfuron-ethyl to quinclorac to the plant extraction aid is 10-20: 10-20: 20-50: 5-10.

Further, the mass ratio of flazasulfuron to pyrazosulfuron-ethyl to quinclorac to the plant extraction aid is 10-20: 20-30: 30-60: 5-10.

Further, the mass ratio of flazasulfuron to pyrazosulfuron-ethyl to quinclorac to the plant extraction aid is 10-15: 10-20: 30-40: 5-10.

Furthermore, the herbicide can be in the form of suspending agent, wettable powder, water dispersible granules and missible oil.

Further, the herbicide is used by the following method: the weeds are mixed with water for use at the 7-8 leaf stage after winter according to the amount of 40-70 g/mu.

Further, the content standards of the components in the herbicide are as follows: 25% of flazasulfuron, 3% of pyrazosulfuron-ethyl, 47% of quinclorac and 25% of plant extraction auxiliary agent.

Compared with the prior art, the herbicide has the following advantages:

1. the herbicide provided by the invention has high herbicidal activity through synergistic effect of the three herbicides, the herbicide rapidly enters a plant body with the assistance of the plant extraction auxiliary agent and is accumulated on a part with vigorous growth, and the growth is inhibited under the condition of illumination, so that weed tissues are finally rotted and die, namely, the herbicide composition provided by the invention can kill weeds through three different ways, so that a higher synergistic effect is generated, and the herbicidal activity of the herbicide can be greatly improved;

2. the herbicide disclosed by the invention is wide in weeding spectrum, long in lasting period and complementary in action, is mainly used for preventing and removing broadleaf weeds, gramineous weeds and cyperaceae weeds, can be used for treating soil and stems and leaves, can keep the weeding effect for about 30 days, and has double actions of leaf surface treatment and sealing, so that the lasting period of the herbicide is prolonged;

3. the herbicide disclosed by the invention acts on weeds from different opposite sides through three herbicide agents, so that the drug resistance of the weeds is reduced, and the service life of the herbicide agents is prolonged.

4. The herbicide disclosed by the invention is high in safety, can be applied to lawn weeding, can prevent and kill various gramineous, cyperaceous and broadleaf weeds in the lawn, and has safety on the lawn on the premise of improving the pesticide effect.

Detailed Description

Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs.

The present invention will be described in detail below.

(1) Example 1

10 percent of flazasulfuron, 10 percent of pyrazosulfuron-ethyl, 20 percent of quinclorac, 10 percent of plant extraction auxiliary agent, 2 percent of thickening agent and 100 percent of polyoxyethylene polyoxypropylene block compound, and the suspending agent with the mass percentage of 30 percent of medicament is prepared according to the conventional preparation method.

(2) Example 2

8 percent of flazasulfuron, 12 percent of pyrazosulfuron-ethyl, 20 percent of quinclorac, 10 percent of plant extraction auxiliary agent, 2 percent of thickening agent and 100 percent of polyoxyethylene polyoxypropylene block compound, and the suspending agent with the mass percentage of the medicament of 40 percent is prepared according to the conventional preparation method.

(3) Example 3

10 percent of flazasulfuron, 15 percent of pyrazosulfuron-ethyl, 25 percent of quinclorac, 10 percent of plant extraction auxiliary agent, 2 percent of thickening agent and 100 percent of polyoxyethylene polyoxypropylene block compound, and the suspending agent with the mass percentage of 50 percent of medicament is prepared according to the conventional preparation method.

(4) Example 4

8 percent of flazasulfuron, 15 percent of pyrazosulfuron-ethyl, 25 percent of quinclorac, 10 percent of plant extraction auxiliary agent, 9 percent of white carbon black, 5 percent of sodium lignosulfonate and 100 percent of kaolin are complemented to prepare wettable powder with the mass percentage content of 48 percent according to a conventional preparation method.

(5) Example 5

20% of flazasulfuron, 20% of pyrazosulfuron-ethyl, 30% of quinclorac, 10% of plant extraction auxiliary agent, 9% of white carbon black, 5% of sodium lignosulfonate and 100% of kaolin are complemented to prepare wettable powder with the mass percentage content of 70% according to a conventional preparation method.

(6) Example 6

20% of flazasulfuron, 20% of pyrazosulfuron-ethyl, 20% of quinclorac, 10% of plant extraction auxiliary agent, 9% of NNO (methylene dinaphthalene sodium sulfonate), 5% of alkylphenol polyoxyethylene, and 100% of sodium lignosulfonate, and the flazable oil with the mass percentage of 60% is prepared according to a conventional preparation method.

(7) Example 7

20% of flazasulfuron, 20% of pyrazosulfuron-ethyl, 30% of quinclorac, 10% of plant extraction auxiliary agent, 9% of NNO (methylene dinaphthalene sodium sulfonate), 5% of alkylphenol polyoxyethylene, and 100% of sodium lignosulfonate, and the flazable oil with the mass percentage of 70% is prepared according to a conventional preparation method.

(8) Example 8

1) Indoor activity assay experiment:

using the formulations of examples 1 to 4, the co-toxicity coefficient was determined for the common weed sedge heterotype on turf.

The test method comprises the following steps: respectively sowing a certain amount of seeds of the special-shaped sedge into disposable paper cups with the length of 9cm, sowing 10-15 seeds in each cup, culturing in a light incubator, and carrying out on a crawler-type crop spray when the special-shaped sedge is in the 3-6 leaf stage. And (4) continuously culturing in a greenhouse after treatment, regularly observing the weed control effect of each treatment, weighing the fresh weight of each treated weed after 30 days, and calculating the toxicity regression curve and the co-toxicity coefficient of the weed. The co-toxicity coefficient is more than 120, which shows that the three effective substances have synergistic action, the co-toxicity coefficient is more than 100, which shows that the three effective substances have synergistic action, and the co-toxicity coefficient is less than 100, which shows that the three effective substances have antagonistic action. The measurement results are shown in table 1.

TABLE 1 results of indoor Activity measurement

As can be seen from the table above, the co-toxicity coefficient of the three effective substances after being compounded is more than 120, which shows that the composition has obvious synergistic effect and synergism.

2) Test of field drug effect

Reagent to be tested: 4 ternary complex herbicides in examples 1-4.

Control agents: 25% of flazasulfuron water dispersible granules, 3% of pyrazosulfuron-ethyl wettable powder and 47% of quinclorac wettable powder (sold on the market).

The lawn to be tested: the bermuda grass and the bermuda grass have 3-5 leaf stages, good growth vigor, robust plants and no other plant diseases and insect pests.

Control target: rhizoma alismatis, nutgrass flatsedge, apple, potamogeton indica, arrowhead, cyperus heterophyllus, chickweed, large crabgrass, green bristlegrass herb, barnyard grass, goosegrass herb and the like.

The test method comprises the following steps: various medicaments are accurately weighed according to the area of a test cell, diluted by water and uniformly sprayed by a knapsack sprayer, and a special fan-shaped sprayer for herbicides is selected as the sprayer. When spraying, the liquid medicine is required to be uniformly sprayed into a test cell, and the phenomena of missing spraying and excessive spraying are avoided.

After the test, weed death was observed at 20d and 40d after the application, respectively, and the herbicidal activities of the respective agents were compared. In addition, the growth of the lawn is observed within 1-15 days after the pesticide is applied, so as to investigate whether the pesticide has phytotoxicity on the lawn.

The herbicidal efficacy of the example formulations of the present invention is shown in tables 2 (20 d post-dose) and 3 (40 d post-dose).

TABLE 2 field test results of efficacy (post-dose 20d)

TABLE 3 field efficacy test results (post-drug 40d)

As can be seen from tables 2 and 3, the herbicide composition has obvious control effect on gramineous weeds, cyperaceae weeds and broadleaf weeds, has obvious synergism and long lasting period.

The results of the safety test of the drug are shown in table 4.

TABLE 4 lawn safety survey results of the agents

The results of the investigation in Table 4 show that the lawns in the treatment zones grew well without any drug spots, indicating that the various agents were safe for the lawns.

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, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A herbicide containing flazasulfuron, pyrazosulfuron-ethyl, quinclorac and plant extraction auxiliary agent is characterized in that: the herbicide is prepared from the following raw materials in percentage by mass: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 0.1-80: 0.1-80: 0.1-80: 0.1-80.

2. A herbicide formulation as claimed in claim 1, characterized in that: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 10-20: 10-20: 20-50: 5-10.

3. A herbicide formulation as claimed in claim 1, characterized in that: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 10-20: 20-30: 30-60: 5-10.

4. A herbicide formulation as claimed in claim 2, characterized in that: the mass ratio of the flazasulfuron to the pyrazosulfuron-ethyl to the quinclorac to the plant extraction auxiliary agent is 10-15: 10-20: 30-40: 5-10.

5. A herbicide formulation, as claimed in claims 1 to 4, characterized in that: the herbicide is in the form of suspending agent, wettable powder, water dispersible granule or missible oil.

6. The herbicide agent of any one of claims 1 to 5, wherein: the application method of the herbicide comprises the following steps: the weeds are mixed with water for use at the 7-8 leaf stage after winter according to the amount of 40-70 g/mu.

7. A herbicide formulation, as claimed in claims 1 to 6, characterized in that: the content standard of the components in the herbicide is as follows: 25% of flazasulfuron, 3% of pyrazosulfuron-ethyl, 47% of quinclorac and 25% of plant extraction auxiliary agent.