阅读说明：本技术 一种暖季型草坪中防治杂草的除草剂 (Weed killer for preventing and controlling weeds in warm-season lawn ) 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：本发明公开一种暖季型草坪中防治杂草的除草剂,其有效成分包括啶嘧磺隆和氰氟草酯,所述啶嘧磺隆和所述氰氟草酯的重量比为1-60∶1-60。本发明将啶嘧磺隆和氰氟草酯进行复配,不仅除草效果好,对暖季草坪安全,增益作用强,且杀草谱广,能够增强对阔叶杂草的防效,效果更快更好；同时,与现有单剂相比,提高了速效性及弥补了单剂在低温条件下见效慢的不足,相对于单剂,两种有效成分复配在一起还有增效作用,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 warm-season lawn, which comprises the effective components of flazasulfuron and cyhalofop-butyl, wherein the weight ratio of the flazasulfuron to the cyhalofop-butyl is 1-60: 1-60. The flazasulfuron and the cyhalofop-butyl are compounded, so that the weeding effect is good, the weeding composition is safe for warm-season lawns, 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; meanwhile, compared with the existing single preparation, the quick-acting property is improved, the defect that the single preparation takes effect slowly at low temperature is overcome, compared with the single preparation, the two effective components are compounded together to have a synergistic effect, and due to different action mechanisms of the two components, the two effective components have no interactive resistance, so that the using amount of pesticides is reduced, and the pollution to the environment is also reduced.)

1. The herbicide for preventing and controlling weeds in the warm-season lawns is characterized in that the effective components are flazasulfuron and cyhalofop-butyl, and the weight ratio of the flazasulfuron to the cyhalofop-butyl is 1-60: 1-60.

2. A herbicide formulation as claimed in claim 1, characterized in that: the preferable weight ratio of flazasulfuron to cyhalofop-butyl is 10-30: 10-30.

3. A herbicide formulation as claimed in claim 1, characterized in that: the weight of the flazasulfuron and the cyhalofop-butyl accounts for 10-60% of the weight of the whole herbicide.

4. A herbicide formulation as claimed in claim 1, characterized in that: the preferable weight of flazasulfuron and cyhalofop-butyl accounts for 20-40% of the total weight of the herbicide.

5. A herbicide formulation as claimed in claim 1, characterized in that: the flazasulfuron accounts for 1-30% of the total herbicide in weight.

6. A herbicide formulation as claimed in claim 1, characterized in that: the weight of the cyhalofop-butyl 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 composition is in the dosage forms of emulsifiable concentrate, water dispersible granules, aqueous emulsion, microemulsion, dispersible oil suspending agent, wettable powder and soluble agent.

Technical Field

The inventionToPesticide herbicideTechnique ofIn particular to a weed killer for preventing and controlling weeds in warm-season lawns.

Background

The flazasulfuron is a contact-type selective herbicide, is mainly used for preventing and killing broad-leaved weeds and nutgrass flatsedge such as cleavers, wild sesames, speedwell, abutilon, polygonum aviculare, polygonum orientale, polygonum convolvulus, field bindweed, wormwood, acalypha australis, gynura segetum, wild sesames, flaxseed flax, broom cypress, black nightshade, white mustard and other weeds, has excellent imitation effect on cleavers, abutilon, red gooseberries, shepherd's purse, sun spurge, empty pipe pharbitis and other weeds, and has good activity on sulfonylurea herbicide resistant weeds and the like. Under the condition of light, the flazasulfuron damages the cell membrane of weeds and leads the leaves to be quickly dried and dead by inhibiting protoporphyrinogen oxidase to cause the accumulation of toxic intermediates in the process of chlorophyll biosynthesis. The flazasulfuron is absorbed by plant leaves within 15 minutes after spraying, is not affected by rain, has poisoning symptoms after 3-4 hours, and dies after 2-4 days.

Cyhalofop-butyl is an aryloxy phenoxy propionic acid herbicide, can prevent and remove annual gramineous weeds, has special effect on moleplant seeds, and also has good effect and long lasting period on crab grass, goosegrass herb, green bristlegrass and the like. Cyhalofop-butyl is absorbed by stems, seedlings and leaves in postemergence stem and leaf treatment, is conducted to meristem to the apical and basal directions in plants, and inhibits acetyl coenzyme A carboxylase (ACCase) to stop fatty acid, so that cell division cannot be normally carried out, and a membrane system is damaged, thereby causing the distortion and shrinkage of tender leaves of weeds.

The warm-season lawn grass is a perennial grass of gramineae, and is characterized in that roots are transversely crossed, fibrous roots are thin and weak, stalks are creeping, the lawn grass is mainly propagated by the roots, withered leaf sheaths are frequently reserved at the base parts, the leaf sheaths have no hairs, leaf tongues have cilia shapes, leaves are flat or slightly curled inwards, the surfaces of the leaves are sparse and soft, the back surfaces of the leaves are nearly hairless, the general inflorescence is in a spike shape, the small spike stalks are usually bent and have the length of 5 mm, the small spike has an oval shape, light yellow green or purple brown, the glume has an oval shape, and the flower and fruit period is 5-8 months. Because of the characteristics, the warm-season lawn grass is widely applied to the Yangtze river basin and the areas with higher temperature in the south of China, is mainly suitable for places needing greening such as parks, playgrounds, golf courses and the like, and is also widely used for square greening.

The warm-season lawn grass is not only huge in demand, but also various in variety. However, in the process of planting warm-season turfgrass, the warm-season turfgrass is easily affected by weeds such as goosegrass, clover or wormwood which have vigorous reproductive capacity and strong and tough root systems, the reproductive capacity of the warm-season turfgrass is reduced, the warm-season turfgrass cannot grow normally, and the phenomenon of killing the warm-season turfgrass frequently occurs, so that the turfgrass has to be planted again. At present, the weeds in the warm-season turf grass are removed mainly by adopting herbicides such as the warm-season turf flazasulfuron and the like, the flazasulfuron and the cyhalofop-butyl have relatively single medicament variety, and the problems of drug resistance and residue of the weeds are increasingly prominent. Therefore, overcoming the existing pesticide residue and resistance problems becomes a problem which is currently being researched in the field.

Disclosure of Invention

The invention provides a weed killer for preventing and controlling weeds in a warm-season lawn, and the weed killer composition has the advantages of higher weed killing speed, wide weed killing spectrum, high safety performance, obvious synergistic effect, convenience in pesticide application 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 warm-season lawn are flazasulfuron and cyhalofop-butyl, and the weight ratio of the flazasulfuron to the cyhalofop-butyl is 1-60: 1-60.

Preferably, the weight ratio of flazasulfuron to cyhalofop-butyl is 10-30: 10-30.

Preferably, the flazasulfuron and the cyhalofop-butyl account for 10-60% of the weight of the whole weeding composition.

Preferably, the flazasulfuron and the cyhalofop-butyl account for 20-40% of the weight of the whole weeding composition.

Preferably, the flazasulfuron accounts for 1-30% of the total weight of the weeding composition.

Preferably, the cyhalofop-butyl accounts for 1-60% of the weight of the whole weeding composition.

Preferably, the herbicide also comprises agriculturally acceptable auxiliary materials, and specifically comprises any one or more of a wetting agent, a dispersing agent, an adsorbent, a filler, an emulsifier, a thickening agent, a solvent, a disintegrating agent, an antifoaming agent, an antifreezing agent and a preservative.

Preferably, the herbicide composition is in the form of emulsifiable concentrate, water dispersible granules, aqueous emulsion, microemulsion, dispersible oil suspending agent, wettable powder and soluble solution.

When the herbicide composition is in the form of water dispersible granules, the auxiliary materials are emulsifier, dispersant, wetting agent, thickener, defoamer, antifreeze, preservative and solvent.

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

When the herbicide composition is a suspending agent, the auxiliary materials are emulsifier, dispersant, thickener, defoamer, antifreeze, preservative and solvent.

When the dosage form of the herbicide composition is wettable powder, the auxiliary materials are wetting agents, dispersing agents, adsorbents and fillers.

When the herbicide composition is in the form of water dispersible granules, the auxiliary materials are selected from an adsorbent, a wetting agent, a dispersing agent, a disintegrating agent and a filler.

When the herbicide composition is in the form of emulsifiable concentrate, the auxiliary materials are emulsifier and solvent.

When the herbicide composition is in the form of aqueous emulsion, the auxiliary materials are emulsifier, co-emulsifier, antifreeze agent, defoamer, antimicrobial agent, thickener and colorant.

When the herbicide composition is microemulsion, the auxiliary materials are solvent, stabilizer and antifreeze.

The weed-preventing herbicide in the warm-season lawn has the following beneficial effects:

(1) the flazasulfuron and the cyhalofop-butyl are compounded, so that the flazasulfuron and the cyhalofop-butyl have good activity on barnyard grass with high resistance to agents such as penoxsulam, bispyribac, quinclorac, propanil and the like, and the flazasulfuron has good activity on broadleaf weeds and sedge weeds which cannot be prevented and removed by the cyhalofop-butyl, and the flazasulfuron has good control effect on broadleaf weeds and sedge.

(2) The half-life period of flazasulfuron in soil is only a few hours, and the flazasulfuron is very safe for subsequent crops.

(3) The flazasulfuron and the cyhalofop-butyl are compounded, so that the weeding composition is good in weeding effect, safe to warm-season turfgrass, strong in gain effect, wide in weeding spectrum, capable of enhancing the control effect on broadleaf weeds, and faster and better in effect.

(4) Compared with the existing single preparation, the compound pesticide has improved effect in preventing and removing barnyard grass, and has synergistic effect when being compounded with two effective components.

(5) The flazasulfuron and the cyhalofop-butyl are compounded, and because the action mechanisms of the flazasulfuron and the cyhalofop-butyl are different, the flazasulfuron and the cyhalofop-butyl have no cross resistance, so that 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 will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 technical solution of the present invention will be described in detail with several embodiments.

In the following examples:

the wetting agent is sodium dodecyl sulfate and SOPA 270.

The dispersing agent is sodium lignosulphonate, 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 calcium dodecyl benzene sulfonate, SOPA270, fatty alcohol polyoxyethylene ether and agricultural emulsion No. 600.

The thickening agent is 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 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.