阅读说明：本技术 一种冷季型草坪中防治杂草的除草剂 (Herbicide for preventing and controlling weeds in cold-season lawns ) 是由 张伟兴 张彦超 邢银山 谢小敏 于 2018-08-17 设计创作，主要内容包括：本发明公开一种冷季型草坪中防治杂草的除草剂,其有效成分包括精噁唑禾草灵和硝磺草酮,所述精噁唑禾草灵和所述硝磺草酮的重量比为1～60∶1～60。其有益效果为：本发明将精噁唑禾草灵和硝磺草酮进行复配,除草效果好,对冷季型草坪安全,增益作用强,且杀草谱广,能够增强对阔叶杂草的防效；与现有单剂相比,提高了速效性,两种有效成分复配在一起具有增效作用,且由于两成份作用机理不同,两者之间无交互抗性,从而降低了农药使用量,也减轻了对环境的污染。(The invention discloses a herbicide for preventing and controlling weeds in a cold-season lawn, which comprises the effective components of fenoxaprop-p-ethyl and mesotrione, wherein the weight ratio of the fenoxaprop-p-ethyl to the mesotrione is 1-60: 1-60. The beneficial effects are as follows: the fenoxaprop-p-ethyl and the mesotrione are compounded, so that the weeding effect is good, the weeding composition is safe for cold-season lawns, the gain effect is strong, the weeding spectrum is wide, and the control effect on broadleaf weeds can be enhanced; compared with the existing single preparation, the quick-acting property is improved, the two effective components are compounded together to have a synergistic effect, and because the two components have different action mechanisms, the two effective components have no cross resistance, so that the using amount of the pesticide is reduced, and the pollution to the environment is also reduced.)

1. The herbicide for preventing and controlling weeds in the cold-season lawn is characterized in that the effective components comprise fenoxaprop-p-ethyl and mesotrione, wherein the weight ratio of the fenoxaprop-p-ethyl to the mesotrione is 1-60: 1-60.

2. A herbicide formulation as claimed in claim 1, characterized in that: the weight ratio of fenoxaprop-p-ethyl to mesotrione is 10-30: 10-30.

3. A herbicide formulation as claimed in claim 1, characterized in that: the weight of the fenoxaprop-p-ethyl and the mesotrione accounts for 10-60% of the weight of the whole herbicide.

4. A herbicide formulation as claimed in claim 3, characterized in that: the weight of the fenoxaprop-p-ethyl and the mesotrione accounts for 20-40% of the weight of the whole herbicide.

5. A herbicide formulation as claimed in claim 3, characterized in that: the weight of the fenoxaprop-p-ethyl accounts for 1-30% of the weight of the whole herbicide.

6. A herbicide formulation as claimed in claim 3, characterized in that: the weight of the mesotrione accounts for 1-60% of the weight of the whole herbicide.

7. A herbicide formulation as claimed in claim 1, characterized in that: the herbicide also comprises auxiliary materials, and specifically comprises any one or more of a wetting agent, a dispersing agent, an adsorbent, a filler, an emulsifier, a thickener, a solvent, a disintegrating agent, a defoaming agent, an antifreezing agent and a preservative.

8. A herbicide formulation as claimed in claim 1, characterized in that: the herbicide is in the form of missible oil, water dispersible granules, water emulsion, microemulsion, dispersible oil suspending agent, wettable powder or solution.

Technical Field

The invention relates to a pesticide herbicide technology, in particular to a herbicide for preventing and controlling weeds in a cold-season lawn.

Background

Fenoxaprop-p-ethyl is a selective, endotransductive herbicide mainly used for alopecurus, wild oats, chenopodium quinoa, tiger tail, large crabgrass, miscanthus, barnyard grass, cricket grass, teff grass, wild millet, duckbilled grass, moleplant seed, cluster moleplant seed, nitand grass, broomcorn millet, switch millet, cluster millet, large millet, setaria and common bluegrass. The weeds are absorbed by stem leaves and conducted to growth points of leaf bases, internode meristems and roots after being applied with the herbicide, the weeds are quickly converted into free acids of phenoxy groups, synthesis of fatty acids is inhibited, the growth points and the meristems of the weeds are damaged, the effect is quick, the weeds stop growing within 2-3 days after being applied with the herbicide, the heart leaves lose green and change purple in color after 5-7 days, the meristem is browned, then the base parts of tillers are necrotic, and the leaves gradually change purple and die.

Mesotrione is a triketone herbicide and has the advantages of wide herbicidal spectrum, low dosage, good effect and low toxicity. After the target plants are applied, the plants are conducted in xylem and phloem of the plants, generate albinism (due to degradation of chlorophyll), and then die slowly. The herbicide can prevent and kill most annual broadleaf weeds, and particularly has good weed control effect on the resistance of sulfonylurea herbicides, such as: erigeron breviscapus, siberian cocklebur, amaranth, amaranthus spinosus, black nightshade and the like.

The cold-season lawn belongs to perennial herbs, is mostly distributed in high-altitude areas of temperate zones, cold zones, subtropical zones and tropical zones, and is generally resistant to trampling and pruning. Most blades of lawn grass are small, slender, upright, low in growing point and protected by multiple layers of tough leaf sheaths, plants are bushy type, rhizome type or creeping type, the regeneration force is strong, the seed bearing amount is large, and the roots, the stems or the creeping stems are developed. The characteristics of the cold season type lawn enable the cold season type lawn to be mainly applied to places needing greening, such as parks, playgrounds, golf fields and the like in the north of China, and also to be widely applied to greening of urban squares, so that the demand is huge, and the types of the cold season type lawn are various.

In the process of planting the cold-season lawn, particularly, the influence of grassy weeds, eleusine indica with tough roots, field bindweed, clover or chickweed and other weeds causes the reproductive capacity of the cold-season lawn to be reduced, the lawn appearance effect is poor, and the weeds in the cold-season lawn are disorderly grown, so that the cold-season lawn has to be planted again. At present, special herbicides such as oxazalin, mesotrione and the like for the cold-season type lawn are mainly adopted to control weeds in the cold-season type lawn. The medicament variety has the following defects in the using process:

(1) the variety of the medicament is relatively single, and the problems of drug resistance and residue of weeds are increasingly prominent;

(2) fenoxaprop-p-ethyl has a good control effect on gramineous weeds, but has a general control effect on broadleaf weeds;

(3) the weeding spectrum of the mesotrione after compounding is wide, the effect is fast, the safety is high, but the effect of controlling broadleaf weeds mainly is poor on gramineous weeds, particularly green bristlegrass, the control effect on barnyard grass in arid plots is poor, and the using method of the mesotrione is to be studied.

Accordingly, those skilled in the art have been devoted to the development of a herbicide that overcomes the existing problems of pesticide residue and resistance.

Disclosure of Invention

The invention provides a herbicide for preventing and controlling weeds in a cold-season lawn, which effectively overcomes the problems of herbicide residue and drug resistance in the prior art, and has the advantages of higher weed control speed, wide weed control spectrum, high safety performance and low toxicity.

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

the active ingredients of the herbicide for preventing and controlling weeds in the cold-season lawn comprise fenoxaprop-p-ethyl and mesotrione, wherein the weight ratio of the fenoxaprop-p-ethyl to the mesotrione is 1-60: 1-60.

Preferably, the weight ratio of fenoxaprop-p-ethyl to mesotrione is 10-30: 10-30.

Wherein, the fenoxaprop-p-ethyl and the mesotrione preferably account for 10-60% of the weight of the whole herbicide.

Wherein, the fenoxaprop-p-ethyl and the mesotrione preferably account for 20-40% of the weight of the whole herbicide.

Wherein, the fenoxaprop-p-ethyl accounts for 1-30% of the weight of the whole herbicide.

Wherein, the mesotrione accounts for 1-60% of the total herbicide by weight.

Preferably, the herbicide also comprises agriculturally acceptable auxiliary materials, and the auxiliary materials are selected from any one or more of wetting agents, dispersing agents, adsorbents, fillers, emulsifiers, co-emulsifiers, thickening agents, solvents, disintegrating agents, defoaming agents, antifreezing agents and preservatives.

Preferably, the herbicide is an emulsifiable concentrate, a water dispersible granule, an aqueous emulsion, a microemulsion, a suspending agent, a dispersible oil suspending agent, a wettable powder and a soluble agent.

When the herbicide adopts an emulsifiable concentrate, the auxiliary materials adopt an emulsifier, a dispersant, a wetting agent, a thickening agent, a defoaming agent, an antifreezing agent, a preservative and a solvent.

When the herbicide is water dispersible granules, the auxiliary materials are an adsorbent, a wetting agent, a dispersing agent, a disintegrating agent and a filler.

When the herbicide is water emulsion, the auxiliary materials are emulsifier, co-emulsifier, antifreeze agent, defoamer, antimicrobial agent, thickener and colorant.

When the herbicide is a suspending agent, the auxiliary materials are an emulsifier, a dispersant, a thickening agent, a defoaming agent, an antifreezing agent and an antiseptic.

When the herbicide is a dispersible oil suspending agent, the auxiliary materials are a dispersing agent, an emulsifying agent, a thickening agent and a solvent.

When the herbicide is wettable powder, the auxiliary materials are wetting agent, dispersing agent, adsorbent and filler.

The invention has the beneficial effects that:

(1) the fenoxaprop-p-ethyl and the mesotrione are compounded, resistant weeds are generated to sulfonylurea herbicides, the fenoxaprop-p-ethyl and the mesotrione have good activity to the weeds, gramineous weeds with poor control effect to the mesotrione, such as green bristlegrass weeds, the fenoxaprop-p-ethyl has good activity to the weeds, the mesotrione has good control effect to broadleaf weeds and part of gramineous weeds, and the fenoxaprop-p-ethyl has no control effect to the broadleaf weeds and the sedge;

(2) the half-life period of fenoxaprop-p-ethyl in soil is only a few hours, the time is short, and the fenoxaprop-p-ethyl is very safe for subsequent crops;

(3) the fenoxaprop-p-ethyl and the mesotrione are compounded, so that the weeding effect is good, the cold-season lawn is safe, the gain effect is strong, the weeding spectrum is wide, the control effect on broadleaf weeds can be enhanced, and the effect is quicker and better;

(4) compared with the existing single preparation, the quick-acting property is improved, and compared with the single preparation, the two effective components are compounded together to have a synergistic effect;

(5) the fenoxaprop-p-ethyl and the mesotrione are compounded, and the two components have different action mechanisms, so that the fenoxaprop-p-ethyl and the mesotrione have no cross resistance, the use amount of pesticides is reduced, and the pollution to the environment is also reduced.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following are examples of the compounded combination of fenoxaprop-p-ethyl and mesotrione, and the following examples are given:

the wetting agent is sodium dodecyl sulfate and SOPA 270;

the dispersing agent is sodium lignosulfonate, castor oil polyoxyethylene ether, peregal O-25 and SOPA 270;

the adsorbent is white carbon black;

the filler is kaolin, starch and talcum powder;

the emulsifier is selected from calcium dodecyl benzene sulfonate, SOPA270, fatty alcohol-polyoxyethylene ether and agricultural emulsion No. 600;

the thickening agent is selected from organic bentonite, magnesium aluminum silicate and xanthan gum.

The solvent is methyl oleate, soybean oil, cyclohexanone, S-200 solvent oil or water.

The disintegrating agent is selected from ammonium sulfate and sodium sulfate.

The defoaming agent is an organic silicon defoaming agent.

The antifreezing agent is ethylene glycol.

The preservative is sodium benzoate.