CN106993618A - Herbicidal combinations for paddy field weeding - Google Patents

Abstract

The invention discloses a kind of Herbicidal combinations for paddy field weeding, including include oxadiargyl, three kinds of active ingredients of pretilachlor and prometryn.Active ingredient mass ratio is 1 20：1‑60：1 40, the mass percent summation of three kinds of active ingredients in the composition is 1 80%.Herbicidal combinations of the present invention, for the single dose or binary built composition of equally effective composition, synergistic effect is obvious, and effectively expand herbicide controlling spectrum, reduce effective ingredient consumption simultaneously, the security to crop is improved, and delays single medicament to use the occurrence and development of herbicide resistance.Herbicidal combinations of the present invention are applied to prevent and kill off the most of grassy weeds of rice terrace and broad leaved weed, and particular against property barnyard grass, the weeds such as mao matang, Setaria glauca, duckweed, water silk floss, bog pondweed have good preventive effect, and the lasting period is long, and safety is showed to paddy rice.

Description

Herbicidal combinations for paddy field weeding

Technical field

Invention belongs to technical field of pesticide, more particularly, to a kind of Herbicidal combinations for paddy field weeding.

Background technology

Oxadiargyl (Oxadiargyl), chemical name 5- tertiary butyls -3- (2,4- bis- chloro- 5- (propargyl oxygen) benzene Base -) -1,3,4- oxadiazole -2- (3H) -one are a kind of new oxadiazoles nitrogen-containing heteros of Rhone-Poulenc Company's exploitation Ring class herbicide, is mainly absorbed through young shoot, seedling and root, and proporphyrinogen oxidase is suppressed by being accumulated in the vigorous position of growth Activity and play herbicide effect.Annual grass is prevented and kill off available for paddy rice, potato, sunflower, vegetables, beet, orchard etc. Section, Cyperaceae and broadleaved herb and part perennial weeds.

Pretilachlor (Pretilachlor), category 2- acetyl chlorides replace phenyl amines herbicide, with high selectivity, main to use In preventing and kill off grassy weed, weed seed absorbs medicament in germination process, and root absorption is poor.It is thin for weeding before bud Born of the same parents divide inhibitor.Barnyard grass in paddy field, difformed galingale herb, needle spikesedge herb, Monochoria vaginalis, rhizoma alismatis etc. can be prevented and kill off for soil treatment.

Prometryn (prometryn), double (the isopropylamino) -1,3,5-triazines of chemical name 2- methyl mercaptos -4,6-, a kind of three nitrogen Benzene class selectivity translocated herbicide, is mainly entered in plant and is conducted by root absorption.To the Weed-control effect just sprouted It is best.Suitable for paddy rice, cotton, soybean, wheat class, peanut, sunflower, potato, fruit tree, vegetable fields.See effectively prevent and kill off barnyard grass, Lady's-grass, moleplant seed, green bristlegrass, amaranth, knotweed, lamb's-quarters, amur foxtail, difformed galingale herb, cyperus iria, needle spikesedge herb, bog pondweed, four leaf duckweed, firefly A variety of weeds such as Lin, Procumbent Falsepimpernel, mexicana, rhizoma alismatis, Monochoria vaginalis, short arrowhead.

Oxadiargyl, three kinds of active ingredients of pretilachlor and prometryn in chemical constitution, physicochemical property and the mechanism of action not Together, corresponding herbicide ability, herbicide mechanism and herbicide controlling spectrum are different, and different herbicidal compositions are reasonably compounded, generally both Herbicide controlling spectrum can be expanded, while the weeds prevented and kill off difficult to some comparisons play preferable preventive effect.

Chinese patent CN 103262844A《A kind of Herbicidal composition for rice field》Disclose it is a kind of comprising oxadiargyl, The herbicidal composition of pretilachlor and Oxyfluorfen, the weight ratio of oxadiargyl, pretilachlor and Oxyfluorfen is 1%- 20%：1%-40%：5%-40%, can effectively prevent and treat rice terrace annual gramineae and broad leaved weed；Chinese patent CN 106172461A《A kind of Herbicidal composition for rice field》Disclose one kind and contain orthosulfamuron, oxadiargyl and prometryn three The Herbicidal combinations of active ingredient are planted, the wherein weight ratio of orthosulfamuron, oxadiargyl and prometryn is 1：0.6-2.4： 5-20, can effectively prevent and kill off the most of grass family of rice terrace, broadleaved herb and sedge weed；Chinese patent CN 103975938A 《A kind of Herbicidal combinations for being used to prevent and kill off rice terrace annual grassy weeds》Disclose one kind and contain oxadiargyl, pretilachlor and ring The weight ratio of the Herbicidal combinations of third three kinds of active ingredient of Sulfometuron Methyl, wherein oxadiargyl, pretilachlor and AC322140 is 1-50：1-80：1-40, can effectively prevent and kill off rice terrace annual grassy weeds；Chinese patent CN 10408231A《One kind is used for paddy rice and moved Plant the Herbicidal combinations in field》Disclose a kind of weeding containing oxadiargyl, three kinds of active ingredient of mesotrione and pretilachlor The weight ratio of composition, wherein oxadiargyl, mesotrione and pretilachlor is 0.1%-30%：0.1%-20%：0.1%- 50%, it can effectively prevent and kill off rice terrace annual grassy weeds

Present invention seek to address that serious, the poor technical problem of prevention effect, Bing Que Evil grass occur for existing resistant weed Ketone, pretilachlor and prometryn three kinds of active ingredients compounding, its mechanism of action are different, to generally occur at present barnyard grass, resistance barnyard grass The weeds such as grass, lady's-grass, mao matang, green bristlegrass, Setaria glauca, duckweed, water silk floss, bog pondweed have good preventive effect.

Have not yet to see and be related to the ternary built herbicidal composition that oxadiargyl, pretilachlor and prometryn are constituted Relevant report.

The present inventor sieves to the Herbicidal combination composition formula containing oxadiargyl, three kinds of active ingredients of pretilachlor and prometryn Select and its furtherd investigate using technology, by lot of experiments, complete the present invention.The Herbicidal combinations can effectively solve the problem that mesh The herbicide dispenser dosage that preceding control of weeds is faced is big, and access times are more, and residues of pesticides are serious, and field resistance weeds are difficult to have What is imitated prevents and kill off and easily produces the problems such as resistance.Cost accounting can have effectively been saved, the pollution to environment is reduced.

The content of the invention

The present invention is in order to overcome the deficiencies in the prior art to have obvious synergistic function there is provided one kind, to rice safety, Weeds spectrum is wide, low-residual, low cost, the Herbicidal combinations for paddy field weeding that can effectively delay herbicide resistance to produce.

To achieve these goals, the present invention uses following technical scheme：A kind of Herbicidal combinations for paddy field weeding, Including including oxadiargyl, three kinds of active ingredients of pretilachlor and prometryn.

Further, the mass ratio of the oxadiargyl, pretilachlor and prometryn is 1-20：1-60：1-40.

Further, the weight of the oxadiargyl, pretilachlor and prometryn accounts for the 1- of Herbicidal combinations gross mass 80%, auxiliary agent and other excipient surpluses.

Herbicidal combinations of the present invention, can be by conventional pesticide producing mode, and it is outstanding that processing is prepared into wettable powder, oil The formulation that various forms of suitable agricultural productions such as floating agent, suspension emulsion, water dispersible granules, granule are used.

Described insecticides adjuvant is selected from emulsifying agent, wetting agent, dispersant, thickener, synergist, antifreezing agent, defoamer etc. In one or more.

The carrier may be selected from white carbon, kaolin, diatomite, bentonite, precipitated calcium carbonate, gypsum, attapulgite, pottery One or more in soil, soluble starch, urea etc..

The solvent may be selected from methyl oleate, S-100, S-150, S-200, dimethylbenzene, trimethylbenzene, methyl naphthalene, corn oil, One or more in soybean oil, rapeseed oil, peanut oil and water etc..

The emulsifying agent may be selected from castor oil polyoxyethylene ether, APES phosphate, phenyl phenol polyoxy second One or more in alkene ether, styrylphenol polyoxyethylene ether, AEO, alkylbenzene naphthenic acid salt etc..

The wetting agent may be selected from aliphatic alcohol sulfate, AEO, sodium sulfate of polyethenoxy ether of fatty alcohol, PULLRONIC F68 block polymer, benzene sulfonamide acid alkali metal salt, dialkyl succinylsuccinate sulfonated ester, lignin sulfonic acid One or more in salt, APES, APES formaldehyde condensation product, saponin etc..

The dispersant may be selected from lignosulfonates, alkylbenzenesulfonate, APES, alkyl naphthalene sulfonic acid Salt, N- Methyl fatties acyl group-taurate, APES formaldehyde condensation product, aralkyl benzene sulfonate, alkylnaphthalene sulphur One in sour formaldehyde condensation products sodium salt, aralkyl naphthalene sulfonic acid-formaldehyde condensation product sodium salt, polycarboxylate, aliphatic amine polyoxyethylene ether etc. Plant or several.

The thickener may be selected from xanthans, gelatin, Arabic gum, guar gum, sodium alginate, sodium cellulose glycolate, poly- One or more in vinyl alcohol, polyacrylamide, meteorological white carbon, sulfuric acid magnalium, diatomite, organic spray profit soil etc..

In the optional autohemagglutination trisiloxanes of synergist, AEO, butanedioic acid di-isooctyl sulfonate etc. One or more.

The antifreezing agent may be selected from the one or more in propane diols, ethylene glycol and glycerine etc..

The defoamer is organic silicon defoamer.

Further, the composition is applied to prevent and kill off paddy field weed

Further, the paddy field weed is grassy weed and broad leaved weed, and the composition is applied to anti-water removal The most of grassy weeds in rice field and broad leaved weed.

Further, the paddy field weed is resistance barnyard grass, mao matang, Setaria glauca, duckweed, water silk floss, bog pondweed

In summary, broad weed-killing spectrum of the present invention, herbicidal effect significantly, especially to occur at present commonplace barnyard grass, The weeds such as resistance barnyard grass, lady's-grass, mao matang, green bristlegrass, Setaria glauca, duckweed, water silk floss, bog pondweed have good preventive effect.

And the action site due to each active ingredient in plant is different with the mode of action, therefore according to existing miscellaneous Theory of development occurs for careless resistance, and Herbicidal combinations of the present invention can effectively avoid, delay or control the generation of herbicide resistance And development.

Embodiment

In order that those skilled in the art are better understood from the essence of the present invention, come with reference to specific embodiment to this Invention is further described, but does not limit the invention to these embodiments.Those skilled in the art should recognize Know, present invention encompasses all alternatives, improvement project and the equivalents potentially included in Claims scope.

It is raw to survey embodiment 1

Test name：Oxadiargyl, the pretilachlor toxicity determination test to weeds mixed with prometryn.

Test objective：By greenhouse pot culture active determination test with definitely oxadiargyl, pretilachlor and prometryn Between the mixed synergistic effect to weeds, further comparative composition, and the activity of weeding between composition and single dose, so as to Better illustrate Herbicidal combinations of the present invention.

Test target：It is experiment target from barnyard grass, Setaria glauca and duckweed.

Test medicine：96% oxadiargyl TC, 95% pretilachlor TC and 95% prometryn TC.

Test medicine and preparation：A certain amount of active compound is weighed, mother liquor is made into from the dissolving of suitable organic solvent, by setting Dosage is handled with the distilled water diluting containing 0.1% Tween-80 into test dose.

Try material culture：The experiment special soil that experiment soil is collected for non-medication plot, from bore 8cm, deep 7cm flowerpots, Soil is filled to 3/4 height, adds water after after soil completely moistening, target barnyard grass and Setaria glauca seed is distinguished into uniform broadcasting extremely In basin alms bowl, then cover the mixed husky fine earth of one layer of 0.5-1.0cm thickness, hot-house culture, regular moisturizing to keep 100% soil moisture, After planting 24h is stand-by；Duckweed field is gathered, and is sieved and washed and is selected robust growth and the basically identical plant of growing way later, respectively 32*45*24 plastic culture case is placed in, in the unified culture breeding in greenhouse.

Test method：Using greenhouse pot culture method, spraying treatment is carried out for examination weeds under each dosage.Often processing sets 4 repetitions, Separately set blank control.Handle in rearmounted greenhouse and cultivate, regular moisturizing keeps soil moisture.

Investigation method：Routine observation plant reaction symptom after processing, and evaluate comprehensive by 0-100% ocular estimates in 15d after medicine Activity of weeding is closed, while determining 21d aerial part weeds fresh weights, fresh weight inhibition is calculated, medicament pair is evaluated with fresh weight inhibition Target virulence.

Fresh weight inhibition (%)=(control fresh weight-processing fresh weight)/control fresh weight * 100.

Synergy evaluation method：Using DPS software analysis, virulence equation, LC50 values (mg/L) and co-toxicity coefficient are calculated CTC, the results are shown in Table 1 and table 3.

Table 1：Oxadiargyl, pretilachlor are mixed with prometryn single dose and different proportion to barnyard grass virulence test result

Table 2：Oxadiargyl, pretilachlor are mixed with prometryn single dose and different proportion to Setaria glauca virulence test knot Really

Table 3：Oxadiargyl, pretilachlor are mixed with prometryn single dose and different proportion to duckweed virulence test result

Wherein co-toxicity coefficient CTC >=120 represent synergistic effect.

From above-mentioned experiment, oxadiargyl, pretilachlor are mixed with prometryn equal to barnyard grass, Setaria glauca and duckweed With obvious synergistic effect.

Example of formulations

Active ingredient flutters grass using 96% oxadiargyl TC, 95% pretilachlor TC and 95% in embodiments below Net TC, each component percentage composition is weight percent content.

Example of formulations 1：54% oxadiargyl pretilachlor prometryns (6:28:20) wettable powder

By 6 parts of weight of oxadiargyl, 28 parts of weight of pretilachlor, 20 parts of weight of prometryn, wetting agent dodecyl sulphate 2.0 parts of weight of sodium, NNO7 parts of weight of dispersant, 8 parts of weight of white carbon, fine particle calcium carbonate are mended to 100 parts of weight, and above component is mixed into equal Air-flow crushing is carried out after even and obtains 54% oxadiargyl pretilachlor prometryns (6:28:20) wettable powder.

Example of formulations 2：25% oxadiargyl pretilachlor prometryns (2:13:10) oil-suspending agent

2 parts of weight of oxadiargyl, 13 parts of weight of pretilachlor, 10 parts of weight of prometryn, bamboo this grease breast of 20 parts of weight Agent YUS-110, bamboo this grease dispersant EP60P, the organobentonite 838F of 1.5 parts of weight, gas-phase silica of 5 parts of weight 0.2 part of weight, 10 parts of weight of No. 200 solvent naphthas, esterification soybean oil is mended to 100 parts of weight, and above component is high with cutter Speed shearing is mixed and is sanded by sand mill, and 25% oxadiargyl pretilachlor prometryns (2 are made:13:10) oil is outstanding Floating agent

Example of formulations 3：34% oxadiargyl pretilachlor prometryns (3:17:14) suspended emulsion

17 parts of weight of pretilachlor, the emulsifying agent D935 of 12 parts of weight are dissolved in 150# solvent naphthas and obtain oil phase；Oxadiargyl 3 Part weight, 14 parts of weight of prometryn, xanthans, Kathon CG 0.2 part, 3 parts weight emulsifying dispersant SC, antifreezing agents of 0.1 part of weight 5 parts of propane diols is well mixed, and adding water complements to 100 parts of weight and wet method is sanded and obtains aqueous phase；During high speed shear aqueous phase Oil phase is slowly added to, continues to shear 30 minutes i.e. available 34% oxadiargyl pretilachlor prometryns (3 after adding:17: 14) suspended emulsion.

Example of formulations 4：24% oxadiargyl pretilachlor prometryns (2:12:10) water dispersible granules

2 parts of weight of oxadiargyl, 12 parts of weight of pretilachlor, 10 parts of weight of prometryn, 4 parts of weight of white carbon, 2 parts of weight Wetting agent EFW, 7 parts of weight dispersant polycarboxylate WG7,5 parts of weight of glucose, kaolin are supplied in 100 input mixing kettles and mixed Close it is uniform after air-flow crushing obtain pulvis, the kneading that then adds water is granulated and dried and obtains 24% oxadiargyl pretilachlors and flutter grass Only (2:12:10) water dispersible granules.

Example of formulations 5：4.5% oxadiargyl pretilachlor prometryns (0.5:2.2:1.8) granule

By 0.5 part of weight of oxadiargyl, 2.2 parts of weight of pretilachlor, 1.8 parts of weight of prometryn, 1 part of weight of wetting agent EFW Amount, 4 parts of weight of dispersant NNO, MC0.5 parts of weight of adhesive C, kaolin benefit cause gas after being well mixed in 100 input mixing kettles Stream crushing obtains pulvis, and the kneading that then adds water, which is granulated and dried, obtains 4.5% oxadiargyl pretilachlor prometryns (0.5: 2.2:1.8) granule.

Example of formulations 6：14% oxadiargyl pretilachlor prometryns (1.2:7.0:5.8) wettable powder

1.2 parts of weight of oxadiargyl, 7.0 parts of weight of pretilachlor, 5.8 parts of weight of prometryn, 1.5 parts of weight wetting agents are drawn Powder is opened, 6 parts of weight dispersant D425,8 parts of weight of white carbon, fine particle calcium carbonate is mended to 100 parts of weight.Above component is well mixed laggard Row air-flow crushing obtains 14% oxadiargyl pretilachlor prometryns (1.2:7.0:5.8) wettable powder.

Application Example 1：

Oxadiargyl, pretilachlor and prometryn ternary built Herbicidal combinations prevent and kill off the paddy field weed test of pesticide effectiveness

Test medicine：

(1) embodiment 1：54% oxadiargyl pretilachlor prometryns (6:28:20) wettable powder

(2) embodiment 2：25% oxadiargyl pretilachlor prometryns (2:13:10) oil-suspending agent

(3) embodiment 3：34% oxadiargyl pretilachlor prometryns (3:17:14) suspended emulsion

(4) embodiment 4：24% oxadiargyl pretilachlor prometryns (2:12:10) water dispersible granules

(5) embodiment 5：4.5% oxadiargyl pretilachlor prometryns (0.5:2.2:1.8) granule

(6) embodiment 6：14% oxadiargyl pretilachlor prometryns (1.2:7.0:5.8) wettable powder

(7) comparison medicament 1：80% oxadiargyl wettable powder

(8) comparison medicament 2：300g/L pretilachlor missible oil

(9) comparison medicament 3：40% prometryn wettable powder

Trial crops and object：Sample rice varieties are loose round-grained rice 20, and 20 days after transplanting, field main weeds have barnyard grass, horse Tang, duckweed, bog pondweed etc..

Test method：Each test process sets 4 repetitions, experimental plot 20m2, random district's groups arrangement.Set and manually remove simultaneously Grass and clear water control treatment.Each medicament is converted that fine earth is uniformly spread fertilizer over the fields or bottle is got rid of by every mu of test dose.15 days after experimental investigation processing Weeds strain preventive effect and 30 days weeds fresh weight preventive effects, result of the test are shown in Table 4 and table 5.Table 4：15 days each test medicines are to field after dispenser Between weeds strain preventive effect

Table 5：Fresh weight preventive effect of 30 days each test medicines to weeds in field after dispenser

By the field control effectiveness test result of table 4 and table 5, it is found that embodiment 1- embodiments 6 press above-mentioned recommended dose dispenser, Preventive effect to weeds such as the barnyard grass in rice terrace, lady's-grass, duckweed, bog pondweeds is all remarkably higher than comparison medicament, and integrated control effect is very Significantly.Process of the test does not find that test medicine (embodiment 1- embodiments 6) has notable poisoning to produce to paddy rice simultaneously.

As can be seen here, this ternary built Herbicidal combination being made up of the active ingredient of oxadiargyl pretilachlor prometryns three Thing, the herbicidal effect of more single medicament is significantly improved, and shows fabulous synergistic effect, equal to grassy weed and broad leaved weed With preferable prevention effect, herbicide controlling spectrum has been widened, has particularly been had very to barnyard grass, lady's-grass, duckweed and bog pondweed in rice terrace Good preventive effect.

Medicament usage amount can be effectively reduced, while peasant's drug cost is reduced, the influence to environment is reduced.

Herbicidal combinations of the present invention, it is easy to use, it is worth in agriculturally popularization and application.

Although above the present invention is described in detail with a general description of the specific embodiments, at this On the basis of invention, further modification or improvement can be made to it.This will be apparent to those skilled in the art.Cause This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.

Claims (7)

1. a kind of Herbicidal combinations for paddy field weeding, it is characterised in that：Including comprising oxadiargyl, pretilachlor and flutterring grass Net three kinds of active ingredient.

2. the Herbicidal combinations according to claim 1 for paddy field weeding, it is characterised in that：The oxadiargyl, The mass ratio of pretilachlor and prometryn is 1-20：1-60：1-40.

3. the Herbicidal combinations according to claim 1 for paddy field weeding, it is characterised in that：The oxadiargyl, The mass percent summation of pretilachlor and prometryn in the composition is 1-80%.

4. the Herbicidal combinations according to claim 1 for paddy field weeding, it is characterised in that：The composition can be processed Into formulations such as wettable powder, oil-suspending agent, suspension emulsion, water dispersible granules, granules.

5. the Herbicidal combinations according to claim 1 for paddy field weeding, it is characterised in that：The composition is applied to Prevent and kill off paddy field weed.

6. the Herbicidal combinations according to claim 5 for paddy field weeding, it is characterised in that：The paddy field weed is Grassy weed and broad leaved weed.

7. the Herbicidal combinations according to claim 5 for paddy field weeding, it is characterised in that：The paddy field weed is Resistance barnyard grass, mao matang, Setaria glauca, duckweed, water are continuous, bog pondweed.