CN103098821A - Penoxsulam-anilofos weeding composition - Google Patents

Abstract

The invention discloses a penoxsulam-anilofos weeding composition, wherein the weight ratio of penoxsulam to anilofos is 5:1-1:5, preferably 1:2. The weeding composition disclosed by the invention is used for controlling annual weeds in paddy field, the control effect of the weeding composition is obviously superior to that of single dosage, the dosage of the pesticide is reduced, and the adverse effect of the pesticide on the ecological environment is reduced; and the weeding composition has great significance in comprehensive treatment on resistance of the weeds, and brings great economical benefits and social benefits.

Description

Penoxsuam and anilofos Herbicidal combinations

Technical field

The present invention relates to a kind of herbicide composition for paddy fields, is take penoxsuam and anilofos as active ingredient, is used for preventing and kill off the paddy field annual weed.

Background technology

The chemical method weeding is one of upper Main Means of controlling weeds of agricultural.In recent years, because some weed killer herbicide kind large tracts of land are used separately, caused a lot of weeds to develop immunity to drugs.Simultaneously, grass when weeds occur is complicated mutually, not only annual and perennial weed is mixed gives birth to, draft, liana and shrub have concurrently, and weeds emerge uneven, seed, the staggered generation of low age, advanced age weeds, so when the weed killer herbicide kind is used separately, all can show in a certain respect defective and limitation.

Penoxsuam is rice field broad-spectrum herbicide after bud, can effectively prevent and kill off barnyard grass, moleplant seed and annual sedge weed, and effective to numerous broad leaved weeds, and the lasting period is long.Simultaneously, it also can prevent and kill off anti-bensulfuron-methyl weeds in the rice field, and many broad-leaveds and sedge weed and barnyard grass etc. are had residual activity, for composing the widest kind with herbicide in weed killer herbicide in present rice field.But penoxsuam is strong inhibitor of acetolactate synthetase, and medicament presents slower, needs the certain hour weeds just dead gradually.

Anilofos belongs to organic phosphates selectivity inner-adsorption conduction-type herbicide.Young shoot and subterranean stem by plant absorb, and suppress Tom Clancy Splinter Cell and stretch, and make the weeds young leaves be difficult for extracting out, and growth stops, and is withered at last.The weeds effect that aligns sprouting is best, and is relatively poor to the weeds effect of having grown up.Weeds are subjected to grow after medicine and stop, and blade is dark green, decolouring sometimes, and blade shortens and thick, very easily fractures, and lobus cardiacus is difficult for extracting out, and last whole strain is withered.Can effectively prevent and kill off barnyard grass and sedge weed in 3 leaf phases, to rice safety.Be applicable to paddy field and prevent and kill off annual gramineous weed and nutgrass flatsedge, as barnyard grass, bare headed barnyard grass, moleplant seed, cyperus iria, difformed galingale herb, Monochoria vaginalis, dichotomous fimbristylis herb, cusp flower etc.

During the single use of penoxsuam and anilofos, certain defective and limitation are arranged all.

The inventor conducts in-depth research being mixed of penoxsuam and anilofos, on the basis of a large amount of formula indoor screening tests and field medicine effect test, find that penoxsuam and anilofos are mixed, in certain mixed ratio scope, paddy field weed is shown obvious synergistic effect, after further study, completed the present invention.

Being mixed and using of penoxsuam and anilofos there is no report at present.

Summary of the invention

Technical problem to be solved: the object of the invention is to solve the deficiency that above-mentioned weed killer herbicide is actual in using, provide a kind of efficient, low toxicity, low cost, quick-acting good, and the lasting period is long, is conducive to the Herbicidal combinations of the weeds in paddy field comprehensive regulation.

Another object of the present invention is to provide this Herbicidal combinations is applied to prevent and kill off the paddy field annual weed.

Technical scheme: for achieving the above object, the invention provides a kind of Herbicidal combinations take penoxsuam and anilofos as active ingredient, the ratio of weight and number of penoxsuam and anilofos is 5:1～1:5, and the preferred weight portion rate is 1:2.

Described Herbicidal combinations can according to well known to a person skilled in the art method, be mixed with the application forms of the suitable agricultural uses such as suspending agent, oil-suspending agent, aqueous emulsion, wetting powder, water dispersible granules.

Described Herbicidal combinations also contains acceptable insecticides adjuvant on the required agricultural of preparation pesticidal preparations, be selected from one or more in solvent, emulsifier, wetting agent, stabilizing agent, dispersant, bleeding agent, thickener, defoamer, antifreezing agent, disintegrant, binding agent, filler, carrier, medium, surfactant, be known substance, various auxiliary agents commonly used in pesticidal preparations, can change to some extent according to different situations, be not particularly limited.

The production technology of the various application forms of described Herbicidal combinations all belongs to existing known technology, does not repeat them here.

Herbicidal combinations provided by the invention is applied to prevent and kill off the paddy field annual weed.

Herbicidal combinations provided by the invention adopts the method for directed spraying to use usually, also can adopt as required upper other operation techniques used of agricultural.

Herbicidal combinations provided by the invention has following beneficial effect.

1, Herbicidal combinations provided by the invention, show obvious synergistic effect in certain ratio range, the control efficiency of composition is significantly improved than single dose, reduced the using dosage of agricultural chemicals, reduced the medication number of times, reduce drug cost, reduced the adverse effect of agricultural chemicals to ecotope.

2, Herbicidal combinations provided by the invention, the combination of two kinds of active ingredients has enlarged herbicidal spectrum, and a drug can solve various weeds problems, has made up defective and limitation when single dose is used.

3, Herbicidal combinations provided by the invention, two kinds of active ingredient mechanism of action are different, can overcome the shortcoming that long-term single use easily produces resistance, extend the service life of medicament, to the comprehensive regulation important in inhibiting of Weed Resistance.

4, Herbicidal combinations provided by the invention, the drug effect performance is rapid, and the lasting period is long, and use cost is low, and is easy to use, time saving and energy saving, and it applies huge economic benefit and social benefit.

Embodiment

In order to make purpose of the present invention, technical scheme and advantage more short and sweet, the present invention describes with following specific embodiment, but the present invention only limits to absolutely not these examples.The following stated is only the present invention embodiment preferably, only is used for describing the present invention, can not be interpreted as the restriction to scope of the present invention.Should be pointed out that all any modifications of making within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

In these embodiments, unless otherwise indicated, all percentages all are weight percentage.

FORMULATION EXAMPLE one(6% penoxsuam anilofos wetting powder):

Penoxsuam 2%,

Anilofos 4%,

Neopelex 4%,

Sodium lignin sulfonate 3%,

Talcum powder 2%,

White carbon 2%,

Attapulgite is supplemented to 100%.

Above-mentioned formula is entered in blender after coarse crushing in proportion mix, more namely make 6% penoxsuam anilofos wetting powder after air-flow crushing.

FORMULATION EXAMPLE two(6% penoxsuam anilofos suspending agent):

Penoxsuam 2%,

Anilofos 4%,

Agriculture breast 1601# 15%,

To oleoyl amido methyl phenyl ethers anisole sulfonic acid 5%,

Alkyl phenol formaldehyde resin polyoxyethylene ether sulphate 4%,

Bentonite 3%,

Xanthans 0.1%,

Organosilicon 0.4%,

Glycerine 4%,

Deionized water complements to 100%.

Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, allotment making 6% penoxsuam anilofos suspending agent after high shear mixing.

FORMULATION EXAMPLE three(12% penoxsuam anilofos water dispersible granules):

Penoxsuam 2%,

Anilofos 10%,

Lauryl sodium sulfate 6%,

Polycarboxylate 4%,

Sodium chloride 2%,

Polyethylene glycol 3%,

Kaolin complements to 100%.

Dry pulverization process, granulation, drying, screening make 12% penoxsuam anilofos water-dispersible granules in proportion with above-mentioned formula.

FORMULATION EXAMPLE four(18% penoxsuam anilofos aqueous emulsion):

Penoxsuam 3%,

Anilofos 15%,

1-METHYLPYRROLIDONE 10%,

Neopelex 8%,

Polyvinyl alcohol 3%,

Emulsifier 500# 6%,

Organosilicon 0.5%,

Deionized water complements to 100%.

Above-mentioned formula Central Plains medicine, solvent, emulsifiers dissolve are become even oil phase; Water-soluble component and deionized water in above-mentioned formula are mixed make water; Under high-speed stirred, oil phase and water mixing are made 18% penoxsuam anilofos aqueous emulsion.

FORMULATION EXAMPLE five: (10% penoxsuam anilofos oil-suspending agent):

Penoxsuam 2%,

Anilofos 8%,

Vegetable oil 30%,

Bentonite 1%,

Methylated vegetable oil complements to 100%.

Above-mentioned formula Central Plains medicine, solvent, emulsifiers dissolve are become even oil phase; Under high-speed stirred, mix making 10% penoxsuam anilofos oil-suspending agent.

Biologicall test embodiment one:Penoxsuam and anilofos are mixed the synergy of paddy field weed are measured

Be mixed to the synergy of paddy field weed for further understanding penoxsuam and anilofos, the inventor is mixed to penoxsuam and anilofos and has carried out the formula indoor screening test.

Test material: chickweed [ Stellaria media(L.) Cyrillus] (field is collected seed and is preserved).Barnyard grass [ Echinochloa crusgalli(L.) Beaw Setaria] (field is collected seed and is preserved).

Test apparatus: controlled illumination box; The accurate laboratory of POTTER spray tower; Electronic balance (sensibility reciprocal 0.1mg); Micropipette rifle etc.

Test method: the purity that first takes certain mass is the 95% former medicine of penoxsuam, purity is the 96% former medicine of anilofos, add acetone fully to dissolve the Tween 80 aqueous solution dilution of rear use 0.1%, be mixed with respectively the single dose mother liquor, according to the purpose that is mixed, serial proportioning is set, each proportioning arranges 5～7 concentration gradients.Select representative susceptible weeds seed according to single dose herbicide spectrum, be cultured to 1 leaf 1 heart standby.After the weeds cauline leaf of selecting numbering is processed, be placed in illumination box incubated at room temperature 5 days, calculate control efficiency (fresh weight), then with method of least squares calculate suppress in dense EC ₅₀(95% confidence limit), then calculate co-toxicity coefficient (CTC) with the abundant method of Sun Yun.

Co-toxicity coefficient (CTC) 〉=120 shows as synergistic effect; Co-toxicity coefficient (CTC)≤80 shows as antagonism; 80＜co-toxicity coefficient (CTC)＜120 shows as summation action.

Actual measurement toxicity index (ATI)=(standard medicament EC50/reagent agent EC50) * 100.

Theoretical toxicity index (TTI)=(percentage composition of A in toxicity index * mixture of A)+(percentage composition of B in toxicity index * mixture of B).

Co-toxicity coefficient (CTC)=[mixture actual measurement toxicity index (ATI)/theoretical toxicity index (TTI) of mixture] * 100.

Measurement result shows (see Table 1 and table 2), and penoxsuam and anilofos have obvious synergistic effect between mixed ratio 5:1～1:5, and especially at 1:2, synergistic effect is more obvious, and co-toxicity coefficient is more than 160.

Table 1, different proportioning penoxsuam and anilofos are measured the synergy of barnyard grass.

Table 2, different proportioning penoxsuam and anilofos are measured the synergy of moleplant seed.

Biologicall test embodiment two:Be mixed composition for preventing and controlling direct seading rice field of penoxsuam and anilofos is assorted

The grass field control effectiveness test.

Reagent agent and dispenser dosage.

(1) 12% penoxsuam anilofos oil-suspending agent (4% penoxsuam: 8% anilofos), mu preparation 10 grams (1#).

(2) 9% penoxsuam anilofos suspending agents (3% penoxsuam: 6% anilofos), mu preparation 20 grams (2#).

Contrast medicament and dispenser dosage.

(1) 2.5% penoxsuam oil-suspending agent, mu preparation 60 grams (3#).

(2) 10% anilofos missible oil, mu preparation 80 grams (4#).

Dispenser period: the weeds 2-3 leaf phase, be watered even spraying.

Result of the test: see Table 3.As can be seen from the test results: after dispenser 15 days, Herbicidal combinations of the present invention to total preventive effect of direct seading rice annual weed all more than 80.1%; After dispenser 30 days, total preventive effect was all more than 96.1%, and significantly better than the single dose of contrast, synergistic effect is remarkable, and has enlarged herbicidal spectrum, and quick-acting and lasting period obviously are better than single dose.

Table 3, control direct seading rice field weed field control effectiveness test result.

Claims (4)

1. a penoxsuam and anilofos Herbicidal combinations, it is characterized in that: active ingredient is penoxsuam and anilofos. the ratio of weight and number of penoxsuam and anilofos is 5:1～1:5.

2. penoxsuam according to claim 1 and anilofos Herbicidal combinations, it is characterized in that: the ratio of weight and number of described penoxsuam and anilofos is 1:2.

3. penoxsuam according to claim 1 and anilofos Herbicidal combinations is characterized in that: the formulation of described Herbicidal combinations can be a kind of in suspending agent, oil-suspending agent, aqueous emulsion, wetting powder, water dispersible granules.

4. penoxsuam according to claim 1 and anilofos Herbicidal combinations, is characterized in that: be used for preventing and kill off the paddy field annual weed.