CN110720467A - Agricultural field herbicide composition and application thereof - Google Patents

Abstract

The invention provides an agricultural field herbicide composition and application thereof, belonging to the field of agricultural herbicides. After the active ingredients of the penoxsulam and the cyhalofop-butyl are selected for compounding, the weeds can be effectively controlled, the safety is high, and especially the annual weeds in rice fields, such as barnyard grass, moleplant seeds, paspalum distichum, scirpus planiculmis, annual sedge and the like, can be effectively prevented and removed. The agricultural field herbicide composition comprises effective components and auxiliary components, wherein the effective components comprise the sulfentrazone and the cyhalofop-butyl, the weight ratio of the sulfentrazone to the cyhalofop-butyl is 1: 0.1-20, and the effective components comprise 1-90 wt% of the sulfentrazone and the cyhalofop-butyl in the agricultural field herbicide. The product has the characteristics of obvious synergy, reduced field dosage of effective components, reduced production and use cost, reduced pesticide residue, reduced environmental pollution and the like.

Description

Agricultural field herbicide composition and application thereof

Technical Field

The invention belongs to the field of agricultural herbicides, and particularly relates to an agricultural field herbicide composition and application thereof.

Background

The herbicide variety containing a single active component often has defects of different degrees in the field weed control of agriculture, such as easy generation of drug resistance of weeds after continuous application, narrow weed control spectrum, more application times, environmental pollution and the like. For controlling the weeds generating resistance in agriculture, one method is to deduce a new component without cross resistance with the existing varieties, but the development cost of the new effective component is high, the development period is long, and the speed of generating resistance by the weeds can not be kept up with all the time. Other methods such as crop layout adjustment, rotation of different herbicides, etc. have difficulty in actually playing a significant role in the actual operation process.

The sulfentrazone is a novel sulfonamide herbicide which is created and developed by the Japanese combinatorial chemistry, the fomentation chemical industry and the K-I chemical research institute in 1998 and is an acetolactate synthase (ALS) inhibitor. The penoxsulam can effectively prevent and kill various annual weeds, such as boea feltiana, Iris lactea, Arrowia crenata, Cyperus rotundus, Oriental Waterplantain rhizome, Eisenia indica, Oenanthe stolonifera, Pseudobulbus cremastrae seu pleiones, water chestnut, Japanese rattan grass and the like in the transplanted rice field.

Cyhalofop-butyl is the only variety with high safety to rice in the aroyl fluorophenoxy propionic acid herbicide, and the weed control mechanism is a systemic conduction type herbicide, which is absorbed by plant leaves and leaf sheaths, conducted by phloem, accumulated in a plant meristematic region, inhibits acetyl coenzyme A carboxylase, stops fatty acid synthesis, prevents cell division and growth from normally proceeding, destroys ester-containing structures such as a membrane system and the like, and finally leads to plant death. The herbicide has high application time requirement, is only effective on the gramineous moleplant seeds, the barnyard grass and the crabgrass in the 1-4 leaf stage, and has poor weed control effect on the gramineous weeds which are greatly contained in the 5-leaf stage. Therefore, the herbicide composition can be used only in early stage, is basically ineffective for unearthed grass seeds, namely has a killing effect on unearthed seedlings, has no sealing effect on unearthed weeds, is slow in action speed, generally needs 7-14 days to kill the weeds, has short duration, causes more times of application, is generally applied for 2-3 times, has large dosage (effective amount) of 90-150 g/hectare per application, has narrow weed control spectrum, is only effective for gramineous weeds, and is ineffective for cyperaceae weeds, broad-leaved weeds and other weeds.

The composition of different varieties is the most common method for preventing and controlling resistant weeds. The different components are compounded, so that the control effect can be improved, the weed control spectrum is expanded, the using amount of the effective components is reduced, the medication cost is saved, the environmental pollution is reduced, and the method is an important means for comprehensively controlling the field weeds. When the penoxsulam and the cyhalofop-butyl are used singly, certain defects and limitations exist. At present, no compound medicine of the two is available, and the effect of other herbicide medicine combinations for killing weeds in the field is not ideal.

Disclosure of Invention

The invention provides an agricultural field herbicide composition, which comprises effective components and auxiliary components, wherein the effective components comprise flufenacet and cyhalofop-butyl, and the weight ratio of the flufenacet to the cyhalofop-butyl is 1: 0.1-20.

Preferably, the weight ratio of the active ingredients of the penoxsulam to the cyhalofop-butyl is 1: 2-15.

Preferably, the content of the active ingredients of the penoxsulam and the cyhalofop-butyl in the agricultural field herbicide is 1-90% by weight, and preferably 10-70% by weight.

Preferably, the auxiliary components include carriers and auxiliaries.

Preferably, the carrier is one or more of water or filler, and the auxiliary agent at least comprises one surfactant.

Preferably, the surfactant comprises one or more of an emulsifier, a dispersant, a wetting agent or a penetrant; the auxiliary agent also comprises one or more of a solvent, a diluent, a filler, a spreader, a stabilizer, a controlled release agent, a synergist, a dust-proof agent, an anti-drift agent, a phytotoxicity reducing agent, a defoaming agent, a foaming agent, a warning pigment, a thickening agent or a thixotropic agent.

Preferably, the agricultural field herbicide composition is in the form of wettable powder, water dispersible granules, water suspending agent or dispersible oil suspending agent.

In another aspect of the invention, the application of the agricultural field herbicide composition in preventing and removing annual weeds is provided.

In still another aspect of the present invention, there is provided a method for controlling annual weeds in paddy fields, said herbicide composition for agricultural fields being used in paddy transplanting fields or direct seeding fields.

The herbicide provided by the invention is used for preventing and controlling barnyard grass, moleplant seed, paspalum distichum, scirpus planiculmis, annual sedge and the like in a paddy field; has certain control effect on weeds such as ludwigia prostrata, arrowhead, carignane, potamogeton indica, bidens tripartita, cyperus rotundus, felt beef, sarcandra glabra, monochoria vaginalis and the like, and can reduce the application dosage of each effective component, reduce the cost and reduce the pollution.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the agricultural field herbicide composition provided by the invention is used for preventing and removing annual weeds in a paddy field, has obvious effect of preventing most of weeds in the paddy field, has high safety, and can be used in both transplanting fields and direct sowing fields;

2. the agricultural field herbicide composition provided by the invention has obvious synergy because the activity of each component is not simply superposed; the field dosage of the active ingredients is reduced, the production and use cost is reduced, and the pesticide residue and the environmental pollution are reduced;

3. the agricultural field herbicide composition provided by the invention consists of active ingredients with different action mechanisms, and the action sites are increased, so that the herbicide composition is beneficial to overcoming and delaying the generation of drug resistance of weeds.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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 embodiment of the invention provides an agricultural field herbicide composition, which comprises effective components and auxiliary components, wherein the effective components comprise flufenacet and cyhalofop-butyl, and the weight ratio of the flufenacet to the cyhalofop-butyl is 1: 0.1-20.

In the embodiment, in order to ensure good weeding effect and synergistic effect of the compound herbicide composition, the weight ratio of the active ingredients of the flusulfamide to the cyhalofop-butyl is set to be 1: 0.1-20. Within the above range, the herbicidal effects of the effective ingredients are all shown as better addition or synergistic effects, for example, the weight ratio of the effective ingredients of the sulfentrazone and the cyhalofop-butyl can be: 1:0.1, 1:0.5, 1:1, 1:5, 1:10, 1:15, 1:20, etc. However, it is understood that the ratio of the above-mentioned penoxsulam to cyhalofop-butyl varies with the concentration of the active ingredient during use, and those skilled in the art can select any ratio within the above-mentioned weight ratio range as required.

In a preferred embodiment, the weight ratio of the active ingredients of the penoxsulam and the cyhalofop-butyl is 1: 2-15.

In the preferred embodiment, the weight ratio of the active ingredients of the sulfentrazone and the cyhalofop-butyl is further limited, the weight ratio of the active ingredients of the sulfentrazone and the cyhalofop-butyl is 1: 2-15, and good weeding effect can be achieved within the preferable limited range. For example, the weight ratio of the active ingredients, i.e., the flufenacet and the cyhalofop-butyl, may be 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, etc., or any other value within the above-defined range.

In a preferred embodiment, the content of the active ingredients of the penoxsulam and the cyhalofop-butyl in the agricultural field herbicide is 1-90 wt%, preferably 10-70 wt%.

In the preferred embodiment, the content of the active ingredients of the penoxsulam and the cyhalofop-butyl in the weeding composition is 1-90 wt%, preferably 10-70 wt%. The specific addition amount may be determined according to the area and kind of application required actually, for example, the mass of the penoxsulam and cyhalofop-butyl may be 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85% or 90%, or any other value within the above-defined range.

In a preferred embodiment, the adjunct ingredients include carriers and adjuvants.

In a preferred embodiment, the carrier is one or more of water, soybean oil, methyl oleate or filler, the water is preferably deionized water, and the auxiliary agent at least comprises one surfactant.

The filler is selected from one or a mixture of more of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch or light calcium carbonate.

In a preferred embodiment, the surfactant comprises one or more of an emulsifier, a dispersant, a wetting agent, or an osmotic agent; the auxiliary agent also comprises one or more of a solvent, a diluent, a filler, a spreader, a stabilizer, a controlled release agent, a synergist, a dust-proof agent, an anti-drift agent, a phytotoxicity reducing agent, a defoaming agent, a foaming agent, a warning pigment, a thickening agent or a thixotropic agent.

The surfactant is a single agent or a compound preparation of a common nonionic surfactant or an anionic surfactant.

The emulsifier is selected from mixed emulsion composed of one or more of agricultural emulsion 500# (calcium alkyl benzene sulfonate), OP series phosphate ester (nonylphenol polyoxyethylene ether phosphate ester), 600# phosphate ester (phenylphenol polyoxyethylene ether phosphate ester), styrene polyoxyethylene ether ammonium sulfate salt, magnesium salt of alkyl diphenyl ether disulfonate, triethanolamine salt, agricultural emulsion 400# (benzyldimethylphenol polyoxyethylene ether), agricultural emulsion 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Ningru 36# (phenethylphenol formaldehyde resin polyoxyethylene ether), agricultural emulsion 1600# (phenethylphenol polyoxyethylene polypropylene ether), ethylene oxide-propylene oxide block copolymer, AEOP series (nonylphenol polyoxyethylene ether), BY series (castor oil polyoxyethylene ether), agricultural emulsion 33# (alkylaryl polyoxyethylene polyoxypropylene ether), span series (sorbitan monostearate), Tween series (sorbitan fatty acid ester polyoxyethylene ether) or AEO series (fatty alcohol polyoxyethylene ether) A compound (I) is provided.

The dispersing agent is selected from one or a mixture of a plurality of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, calcium alkylbenzene sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid polyoxyethylene ether or glycerin fatty acid ester polyoxyethylene ether.

The wetting agent is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, saponin powder, silkworm excrement or soapberry powder.

The penetrating agent is selected from one or a mixture of more of penetrating agent JFC (fatty alcohol-polyoxyethylene ether), penetrating agent T (diisooctyl maleate sulfonate), azone or organic silicon.

The antifreezing agent is a mixture consisting of one or more of ethylene glycol, propylene glycol, glycerol or urea.

The thickening agent is selected from one or more of xanthan gum, polyvinyl alcohol, bentonite, carboxymethyl cellulose or magnesium aluminum silicate.

The stabilizer is selected from one or more of epoxidized soybean oil, epichlorohydrin, BHT, ethyl acetate or triphenyl phosphate.

The disintegrating agent is selected from one or more of bentonite, urea, ammonium sulfate, aluminum chloride, low-substituted hydroxypropyl cellulose, lactose, citric acid, succinic acid or sodium bicarbonate.

The defoaming agent is selected from one or a mixture of more of silicone oil, silicone compounds, C10-C20 saturated fatty acid compounds or C8-C10 fatty alcohol compounds.

In a preferred embodiment, the agricultural field herbicide composition is in the form of wettable powder, water dispersible granules, water suspending agent or dispersible oil suspending agent.

The invention also provides application of the agricultural field herbicide composition in preventing and killing annual weeds in paddy fields.

In still another embodiment of the present invention, there is provided a method for controlling annual weeds in paddy fields, which is used for transplanting paddy fields or direct seeding fields.

The herbicide composition for agricultural fields provided by the invention has a good control effect on barnyard grass, moleplant seed, broken rice and monochoria vaginalis in rice, and also has good control effects on weeds such as paspalum distichum, scirpus planiculmis, cyperus annuus, polygonum caryophyllata, sagittaria sagittifolia, carignane, watercress, pennisetum purpureum, sedum alopecuroides, sedum hybridum, bodhi, and arthroncus.

The invention tries to compound cyhalofop-butyl with sulfanilamide analogues such as penoxsulam, saflufenacil and the like, experiments are carried out by setting different proportions, but the final experiment results do not obtain good weed control effect. Therefore, the two finally selected active ingredients, namely the penoxsulam and the cyhalofop-butyl are compounded to obtain the pesticide weeding composition, so that the weeding composition has good synergistic effect and weed control effect, also has high safety and is very environment-friendly, and has great popularization and application prospects in the field of herbicides.

In order to more clearly and specifically describe the agricultural field herbicide composition and the application thereof provided by the embodiments of the present invention, the following description will be given with reference to specific embodiments. The percentage in the embodiment is weight percentage, and the treatment dosage of the field drug effect is the dosage of the effective components.

Example 1: (22% wettable powder of flusulam cyhalofop-butyl) 1:0.1

The components and contents are as follows: 20% of flusulam; 2% of cyhalofop-butyl; wetting agent sodium dodecyl sulfate 2%; 8% of dispersant calcium lignosulfonate; 18% of filler white carbon black and the balance of filler kaolin.

Example 2: (20% wettable powder of flusulam cyhalofop-butyl) 1:1

The components and contents are as follows: 10% of flubensulam; 10% of cyhalofop-butyl; wetting agent sodium dodecyl sulfate 3%; 10% of dispersant calcium lignosulfonate; 18 percent of filler light calcium and the balance of filler kaolin.

Example 3: (30% wettable powder of flusulam cyhalofop-butyl) 1:2

The components and contents are as follows: 10% of flubensulam; 20% of cyhalofop-butyl; wetting agent sodium dodecyl sulfate 4%; 13% of dispersant calcium lignosulfonate; 15% of filler white carbon black and the balance of filler kaolin.

The preparation method of the above examples 1 to 3 is as follows: according to the formula proportion of each embodiment, the active ingredients of the penoxsulam and the cyhalofop-butyl are added into a carrier, and a surfactant and other functional additives are added into the carrier, mixed, subjected to air flow crushing and then mixed to prepare wettable powder, namely a finished product of the field herbicide composition. The main equipment required is: a mixer, a jet mill.

Example 4: (30% of flusulam cyhalofop-butyl water dispersible granule) 1:4

The components and contents are as follows: 6% of penoxsulam; 24% of cyhalofop-butyl; sodium dodecylbenzenesulfonate wetting agent 3%; 8% of dispersant alkyl naphthalene sulfonate formaldehyde condensate; the balance of filler attapulgite.

Example 5: (45% of flusulam cyhalofop-butyl water dispersible granule) 1:8

The components and contents are as follows: 5% of flubensulam; 40% of cyhalofop-butyl; wetting agent nekal BX 5%; 10% of dispersant alkylphenol polyoxyethylene ether formaldehyde condensate sulfate; the rest is filler kaolin.

Example 6: (55% of flusulam cyhalofop-butyl water dispersible granule) 1:10

The components and contents are as follows: 5% of flubensulam; 50% of cyhalofop-butyl; 5% of wetting agent sodium dodecyl sulfate; 8% of dispersant alkylphenol polyoxyethylene ether; the rest is filler bentonite.

The preparation method of the above examples 4-6 is as follows: adding the effective components of the sulfentrazone and the cyhalofop-butyl into a carrier according to the formula proportion of each embodiment, adding a surfactant and other functional auxiliaries, mixing, performing jet milling, adding 10-25% of water, kneading, granulating, drying and screening to obtain a water dispersible granule product; or spraying water to the crushed powder in a boiling granulator, granulating, drying, and screening to obtain the field herbicide composition finished product. The main equipment is as follows: mixing machines, jet mills, kneaders, extrusion granulators, drying rooms or fluidized bed drying, or boiling granulators, sieving machines.

Example 7: (39% sulfolobus rimsulfuron-cyhalofop-butyl water suspension) 1:12

The components and contents are as follows: 3% of flusulfamide; 36% of cyhalofop-butyl; emulsifier agricultural milk OP-101.5%; 5% of dispersant polycarboxylate; the thickening agent is selected from xanthan gum and aluminum magnesium silicate, and the using amounts are 0.13% and 2% respectively; 5% of antifreeze propylene glycol; 0.5 percent of defoaming agent silicone compound; water and the balance.

Example 8: (64% of flusulam cyhalofop-butyl water suspension) 1:15

The components and contents are as follows: 4% of flusulfamide; cyhalofop-butyl 60%; 3.5 percent of emulsifier styrene polyoxyethylene ether ammonium sulfate; 5% of dispersant fatty acid polyoxyethylene ether; the thickening agent is selected from xanthan gum and aluminum magnesium silicate, and the using amounts are 0.13% and 2% respectively; 3% of antifreeze propylene glycol; 0.5 percent of defoaming agent silicone compound; the balance of water.

Example 9: (42% sulfolobus acid-cyhalofop-butyl water suspending agent) 1:20

The components and contents are as follows: 2% of flubensulam; 40% of cyhalofop-butyl; emulsifier agricultural milk OP-101.5%; 5% of dispersant polycarboxylate; the thickening agent is selected from xanthan gum and aluminum magnesium silicate, and the using amounts are 0.13% and 2% respectively; 5% of antifreeze propylene glycol; 0.5 percent of defoaming agent silicone compound; the balance of water.

The preparation method of the above examples 7-9 is as follows: according to the formula proportion of each embodiment, the active ingredients of the penoxsulam, the cyhalofop-butyl, the surfactant and other functional additives are sequentially placed in a reaction kettle, water is added for uniform mixing, and the finished product of the field herbicide composition is obtained through high-speed shearing, wet sanding and finally homogeneous filtration. The main equipment is a batching kettle, a colloid mill or a homogenizing mixer, and a sand mill.

Example 10: (25% flusulam cyhalofop-butyl dispersible oil suspending agent) 1:4

The components and contents are as follows: 5% of flubensulam; 20% of cyhalofop-butyl; the emulsifier is selected from agricultural milk 500# and agricultural milk 700# with the dosage of 10% and 8% respectively; 5% of dispersant polycarboxylate and the balance of methyl oleate or soybean oil.

The preparation method comprises the following steps: according to the formula proportion, the effective components of the penoxsulam, the cyhalofop-butyl, the surfactant and other functional additives are sequentially placed in a reaction kettle, the methyl oleate is added, the mixture is uniformly mixed, and the product is obtained through high-speed shearing, sanding and finally homogeneous filtration. The main equipment is a batching kettle, a colloid mill or a homogenizing mixer, and a sand mill.

Comparative example 1: (50g/L triazamide emulsifiable concentrate)

The components and contents are as follows: 50g/L of triazolyl oxamide; 5% of agricultural milk 500# 5%; agricultural milk 700# 1%; 1600# 4% of agricultural milk and the balance of methyl oleate.

The preparation method comprises the following steps: according to the formula proportion, the effective components of the triazolyl oxamide, the surfactant and the filler are sequentially placed in a reaction kettle, stirred to be fully dissolved, uniformly mixed and filtered to obtain the product. The main equipment is a batching kettle.

Comparative example 2: (80% diflufenican water dispersible granule)

The components and contents are as follows: diflufenican 80%; wetting agent nekal BX 6%; 5% of dispersant alkylphenol polyoxyethylene ether formaldehyde condensate sulfate; 1% of alkylphenol polyoxyethylene ether; the rest is filler kaolin.

The preparation method comprises the following steps: adding an effective component diflufenican into a carrier, adding a surfactant and other functional auxiliaries, mixing, performing jet milling, adding 10-25% of water, kneading, granulating, drying and screening to obtain a water dispersible granule product; or spraying water to the crushed powder in a boiling granulator, granulating, drying, and screening to obtain the field herbicide composition finished product. The main equipment is as follows: mixing machines, jet mills, kneaders, extrusion granulators, drying rooms or fluidized bed drying, or boiling granulators, sieving machines.

The following field efficacy test was conducted on the paddy field weeds using the composite herbicides prepared in the examples and comparative examples to better illustrate the advantageous effects of the present invention, and the test results are shown in table 1 below.

Indoor toxicity assay

The virulence factors for barnyard grass were first determined in the examples in-house. The test method is as follows: setting control CK1 (triazolam) and CK2 (diflufenican), respectively preparing the penoxsulam and cyhalofop-butyl into small samples according to different proportions, and potting the pennyroyal in the houseWhen the barnyard grass cotyledon is completely unfolded and 1-2 true leaves grow out, the leaves are treated by medicaments with different proportions, 5 different concentration gradients are made in each proportion, and 4 times of treatment concentration are repeated. Converting the herbicidal effect into several values (y), converting the liquid medicine dosage (mug/g) into logarithm value (x), establishing the inhibition probability values and the dosage logarithm regression equation (toxicity regression formula) of different ratios, and calculating the inhibition median LD of each ratio by the least square method₅₀And calculating the synergistic coefficient SR of different proportions, evaluating the synergistic effect of the compound agent according to the synergistic coefficient, determining the optimal proportion, counting the survival number and the death number of the treated physalis pubescens 14 days after spraying, and calculating the death rate. Calculating virulence regression equation and LD for implementing different proportions by probability method₅₀The calculation formula of the value, the weeding effect and the synergistic coefficient is as follows:

the herbicidal effect (%) (number of control zone weed plants-number of treatment zone weed plants (fresh weight)) ]/number of control zone weed plants (fresh weight) × 100.

The fresh weight control effect (%) [ (weight of fresh grass in blank control area-weight of fresh grass in treatment area) ]/weight of fresh grass in blank control area × 100.

Theoretical LD (th)50 ═ (a + b)/[ (a/A's LD)₅₀) + (LD of B/B)₅₀)]。

In the formula, A represents the sulfentrazone, B represents cyhalofop-butyl, and a and B respectively represent the proportion of the sulfentrazone and the cyhalofop-butyl in the mixed agent.

Coefficient of synergy SR ═ mixture theory LD (th)₅₀Actual LD of mixture₅₀。

Evaluation is made according to the synergy coefficient SR: when the SR is more than 1.5, the mixture has a synergistic effect, when the SR is between 0.5 and 1.5, the addition is carried out, and when the SR is less than 0.5, the antagonism is carried out.

TABLE 1 toxicity test results of pennyroyal and cyhalofop-butyl in different proportions

Medicament	Regression equation of virulence	LD50(ug/g)
			COMPARATIVE EXAMPLE 1(CK1)	Y＝2.8856+1.8375x	14.1758
COMPARATIVE EXAMPLE 2(CK2)	Y＝1.7283+2.8832x	13.7341
			1:0.05 of flubensulam and cyhalofop-butyl	Y＝2.2539+2.5843x	11.5581
1:0.1 of flubensulam and cyhalofop-butyl	Y＝2.5567+2.5462x	9.2759
			1:0.5 of flubensulam and cyhalofop-butyl	Y＝2.5459+2.5552x	9.2266
1:1 ratio of flufenacil to cyhalofop-butyl	Y＝2.4448+2.6642x	9.1542
			1:2 ratio of flufenacil to cyhalofop-butyl	Y＝2.6647+2.6737x	7.6031
1:4 of flufenacil and cyhalofop-butyl	Y＝2.8318+2.8456x	5.7844
			1:6 of flufenacil and cyhalofop-butyl	Y＝1.7241+2.7644x	6.6386
1:8 of flufenacil and cyhalofop-butyl	Y＝2.8415+2.6735x	6.3527
			1:10 of flufenacil and cyhalofop-butyl	Y＝2.7423+2.5775x	7.4642
1:15 ratio of flufenacil to cyhalofop-butyl	Y＝2.3912+2.8842x	8.0253
			1:20 of flufenacil and cyhalofop-butyl	Y＝2.1781+2.9914x	8.7768
1:22 of flufenacil and cyhalofop-butyl	Y＝2.2892+2.6517x	10.5566

TABLE 2 synergistic assay results for pyributicarb and cyhalofop-butyl in different ratios

As can be seen from tables 1 and 2: the synergistic coefficients of the penoxsulam and the cyhalofop-butyl are all larger than 1.5 when the weight ratio of the penoxsulam to the cyhalofop-butyl is 1: 0.1-20, the synergistic effect is shown, and the most obvious synergistic effect is achieved within the weight ratio of 1: 2-15. The application of the penoxsulam in a weight ratio of 1: 0.1-20 is shown as follows: the compound preparation of cyhalofop-butyl has rationality and feasibility for preventing barnyard grass.

The control effects of the herbicide composition on the stephania japonica, the ludwigia prostrata, the cyperus rotundus, the feltwort, the arthroenia segetalis and the monochoria vaginalis are respectively measured by adopting the method, and the synergistic coefficients in different proportioning ranges are calculated, so that the conclusion that the effect is enhanced when the weight ratio of the flusulfamide to the cyhalofop-butyl is 1: 0.1-20 and the effect is most obvious when the weight ratio is 1: 2-15 is obtained.

In the field test, 9 treatments of the embodiment agents, the comparative agents and no agents are arranged, each treatment is repeated for 4 times, and 36 treatment districts are arranged in total, and stem leaves are sprayed at the 3-5 leaf stage of the weeds after the rice seedlings. Randomly taking 3 points per processing cell, 0.33m per point²The healthy number of weeds at each point was investigated 30 days and 60 days after application of the herbicide, and the fresh weight control effect was investigated together with the number of weeds at 60 days after application of the herbicide. The results are shown in tables 3, 4 and 5.

Table 3 examples and comparative examples control of weeds in paddy field (%) 30 days after application

TABLE 4 examples and comparative examples control of weeds in paddy field (%) in 60 days after application

TABLE 5 examples and comparative examples fresh weight control (%) of weeds in paddy field (60 days after application)

The results shown in tables 3 to 5 are the results of the control of the weeds in paddy fields by 30d, 60d, etc. in the examples and comparative examples provided by the present invention. In the experiment, a plurality of representative weed varieties belonging to gramineous weeds and broadleaf weeds in the paddy fields are selected, and the weed control effect of the herbicide composition prepared by the invention on different varieties can be observed, so that the weed control effect of the product disclosed by the invention can be reflected comprehensively.

As can be seen from tables 3-5, the three application doses of the examples 1-10 have very high control effects on barnyard grass, moleplant seed, cyperus rotundus and monochoria vaginalis in rice fields, and the control effects are all as high as more than 88-90%; on the contrary, the control effect results of the comparative examples 1 and 2 are shown, although the control effect of the comparative example 1 on barnyard grass and moleplant seed is more than 90 percent, the control effect on cyperus rotundus and monochoria vaginalis is about 70 percent, the control effect on the cyperus rotundus and the monochoria vaginalis of the comparative example 2 is more than 90 percent, but the control effect on the barnyard grass and the moleplant seed is about 70 percent, so that the results show that, although comparative examples 1 and 2 have good control effects on some field weeds, the weed control spectrum is limited, the ideal spectrum weed control effect cannot be achieved, therefore, through comprehensive analysis on the control effect results of the examples 1 to 10 and the comparative examples 1 to 2, the composition of the penoxsulam and the cyhalofop-butyl, has better control effect on both gramineous weeds and broadleaf weeds, has the function of expanding the weed control spectrum, and is an effective means for realizing broad-spectrum weed control. During the test period, the rice is observed to have no phytotoxicity symptom, and the test medicament is safe to the rice.

Claims (9)

1. The agricultural field herbicide composition is characterized by comprising effective components and auxiliary components, wherein the effective components comprise flufenacet and cyhalofop-butyl, and the weight ratio of the flufenacet to the cyhalofop-butyl is 1: 0.1-20.

2. An agricultural field herbicide composition as claimed in claim 1, wherein the weight ratio of the active ingredients of the sulfentrazone and the cyhalofop-butyl is 1: 2-15.

3. An agricultural field herbicide composition as claimed in claim 1 or 2, wherein the active ingredients of the penoxsulam and cyhalofop-butyl account for 1-90% by weight, preferably 10-70% by weight of the agricultural field herbicide.

4. An agricultural field herbicide composition as claimed in claim 3, wherein the adjuvant comprises a carrier and an adjuvant.

5. An agricultural field herbicide composition as claimed in claim 4, wherein said carrier is one or more of water or a filler, and said adjuvant comprises at least one surfactant.

6. An agricultural field herbicide composition as claimed in claim 5, wherein the surfactant comprises one or more of an emulsifier, a dispersant, a wetting agent or a penetrant; the auxiliary agent also comprises one or more of a solvent, a diluent, a filler, a spreader, a stabilizer, a controlled release agent, a synergist, a dust-proof agent, an anti-drift agent, a phytotoxicity reducing agent, a defoaming agent, a foaming agent, a warning pigment, a thickening agent or a thixotropic agent.

7. The agricultural field herbicide composition of claim 3 or 4, wherein the formulation of the agricultural field herbicide composition is wettable powder, water dispersible granules, water suspension or dispersible oil suspension.

8. Use of the agricultural field herbicide composition of any one of claims 1 to 7 for controlling annual weeds in paddy fields.

9. A method for controlling annual weeds in paddy fields, characterized in that the agricultural field herbicide composition according to any one of claims 1 to 8 is used in transplanting paddy fields or direct seeding paddy fields.