CN102047891A - Mesotrione weeding composition - Google Patents

Abstract

The invention relates to a weeding composition, which is a synergistic weeding composition by taking mesotrione and cyanazine as active ingredients. The invention also relates to various agricultural preparations of the composition, in particular to an oil suspending agent. The invention also relates to the application of the synergistic weeding composition to the prevention and control over weeds in corn fields.

Description

The mesotrione Herbicidal combinations

Technical field

The present invention relates to a kind of Herbicidal combinations, it is that mesotrione and cyanazine are the Synergistic herbicide compositions of active ingredient.The invention still further relates to the various Agrotechnical formulations, particularly oil-suspending agent of above-mentioned composition.The invention still further relates to the purposes of above-mentioned Synergistic herbicide compositions at controlling weeds in cornfield.

Technical background

China is corn major country of production in the world, and cultivated area is about about 300,000,000 mu throughout the year, and the Yellow River and Huai He River Haiti district is the summer sowing corn planting district of China's maximum.Planting type mostly is wheat-corn and yields two crops a year, and the plantation form is most of for interplanting or connect the stubble sowing.The corn field main weeds has lady's-grass, eleusine indica, barnyard grass grass, kitchen garden, Amaranthus retroflexus, field bindweed, lamb's-quarters, india lovegrass, green dog tail, the rhizome of nutgrass flatsedge, iron amaranth grass, black nightshade etc.In the general time, weeds harm can make 1～2 one-tenth of the corn underproduction, and the underproduction is 3～5 one-tenth when serious.

Corn field weed vitality is extremely vigorous, and some seeds are embedded in the soil 20 years and still can germinate, as the rhizome of nutgrass flatsedge, lamb's-quarters, knotweed, kitchen garden, japanese bearbind etc.General weeds have ripe early, irregular, characteristics such as segmentation is emerged, be unfavorable for control, and a lot of weeds can wake up from death, perennial weed was especially shone 3 days in the field manually pulling out the back as kitchen garden, met rain and still can recover growth.In addition, weeds also have surprising fertility, and the solid number of most weeds is several times of crop, hundred times even up to ten thousand times.According to investigations, a strain lady's-grass has 220,000 seeds approximately, and as seen how strong its fertility have.

Chemical weed control is accepted by vast farmers because of it has advantage such as quick, efficient, easy to operate.Especially at the summer sowing corn growth in season, because high temperature, high humidity weed growth are rapid, cloudy weather for several days running weather often appears in addition, manually reach machinery and prevent and kill off difficulty, so should advocate chemical weed control energetically.If but that the weed killer herbicide kind is selected is improper, using method or period discomfort, will cause preventive effect bad even adverse consequences such as poisoning occurs.Therefore, select the fine herbicide of drug effect height, broad weed-killing spectrum, become top priority, and the synergistic complex of agricultural chemicals is the effective ways that enlarge the control spectrum of agricultural chemicals and improve drug effect.

Mesotrione has another name called logical, the nitre sulphur humulone in Meath, English common name: mesotrion, molecular formula C ₁₄H ₁₃NO ₇S chemical name: 2-(4 '-mesyl-2 '-nitro-benzoyl) cyclohexane-1, the 3-diketone, structural formula:

Mesotrione is the new three ketones weed killer herbicide of Zeneca farmingization company exploitation, it is another three ketones weed killer herbicide kind of developing by sulphur humulone structural modification, its biologically active surpasses the sulphur humulone more than 10 times, has more potentiality to be exploited with competitive, registers in Europe in 2000.It begins to sell in Germany and Austria in calendar year 2001 with trade name Callisto, because it is environmentally friendly, calendar year 2001, its single agent and mix preparation were sold in the EU countries and the U.S. in 2002 by the approval of Environmental Protection Agency USA.Mesotrione is effective inhibitor of HPPD (the two oxidase of 4-hydroxyphenyl pyruvic acid), and this kind enzyme extensively is present in the various organisms and catalysis plastoquinone and the biosynthetic initial action of vitamin e.HPPD can be converted into plastoquinone with amino acid tyrosine.Plastoquinone is the co-factor of phytoene desaturase, is the biosynthetic key enzyme of carotenoid.After using mesotrione, HPPD is suppressed, thereby causes tyrosine accumulation and plastoquinone depletion in the plant meristematic tissue, and 3-5 days implants meristematic tissue the yellow symptom occurs and cause withered spot thereupon, spread all over whole strain plant behind the fortnight, plant albefaction and dead gradually.Mesotrione is mainly used in prevents and kill off corn field weed such as Siberian cocklebur etc., and the weeds that sulfonylurea herbicide produced resistance are effective.Mesotrione has very high activity of weeding to corn field weed, can effectively prevent and kill off broadleaf weeds such as dayflower, piemarker, knotweed, acalypha copperleaf, lamb's-quarters, Amaranthus retroflexus, monocotyledon weeds such as lady's-grass, barnyard grass grass, green foxtail also there is certain preventive and therapeutic effect, to corn safety.Has comparatively application prospects.

Cyanazine, have another name called hundred this, bladex, English common name: cyanazine, molecular formula: C ₉H ₁₃ClN ₆, chemical name: 2-chloro-4-ethylamino--6-acetone cyanohydrin base-1,3,5-triazines, structural formula:

Cyanazine is interior suction selective herbicide, and mainly by root absorption, leaf also can absorb.To corn safety, lasting period 2-3 month, back stubble wheat there is not influence.Activity of weeding and soil organic matter content and quality have substantial connection.Much more organic or be clay then the weed killer herbicide consumption also need suitably increase.At Sha Xingchong, the content of organic matter is prone to poisoning after a little while.Kill careless wide spectrum, can prevent and kill off 1 year living grassy weed of great majority and broad leaved weed.

The inventor finds that composite not only expansion of mesotrione and cyanazine kills the grass spectrum, and corn field weed is had beat all synergy control efficiency, especially is re-dubbed oil-suspending agent, and synergy is more obvious.

Summary of the invention

The invention provides a kind of containing by mesotrione and cyanazine Synergistic herbicide compositions as active component.Consumption is few when corn field uses, cost is low for the various composition pesticides of above-mentioned composition, to corn field in broad leaved weed, grassy weed all have good control efficiency.

Technical scheme

As active component, the weight ratio of wherein said active component is a mesotrione: cyanazine is 1: 0.2 to 1: 1 to the present composition with mesotrione and cyanazine, preferred 1: 0.3 to 1: 0.8, and more preferably 1: 0.5.The weight percentage of active ingredient in Herbicidal combinations is 1%～90%, and be preferred 5%～50%, more preferably 10%-40%.

The present composition has excellent Herbicidal synergistic activity, can prevent and kill off the multiple weeds in the corn field, as dayflower, piemarker, knotweed, acalypha copperleaf, lamb's-quarters, Amaranthus retroflexus.Because active ingredient is composite, enlarged and killed the grass spectrum, a dispenser can prevent and treat multiple weeds, has saved the labour and the cost of controlling weeds.

The Herbicidal combinations of mesotrione of the present invention and cyanazine can be mixed with various weeding formulations commonly used, for example is dispersed in the aromatic hydrocarbon solvent with emulsifier, cosolvent and can be mixed with missible oil; Can be mixed with wetting powder through pulverizing again after mixing with emulsifier, dispersant and solid carriers such as potter's clay or kaolin; With emulsifier, dispersant and plant oil carrier can be mixed with oil-suspending agent through shearing, grinding.These formulations that are made into all have significantly the effect of synergy mutually.We also are surprised to find that in the research, and plant oil is outstanding especially to the synergistic effect of this composition, can significantly reduce former medicinally, reduce the weeding cost.

Comprise active ingredient, emulsifier, dispersant and oil in the oil-suspending agent that this composition is mixed with.The weight percentage of active ingredient is 1%～90%, and is preferred 5%～50%, more preferably 10%-40%; Emulsifier consumption 5%～20%, preferred 10%～15%; Dispersant/wetting agent consumption 1%～10%, preferred 2%～6%, oil subsidy foot 100%.

The emulsifier that adopts in the present composition, the aliphatic alcohol sulfate that comprises at least a Sulfates, the alkylol polyethenoxy ether sodium sulfate, alkylol APEO calcium sulphate, the sodium alkyl sulfonate of Sulfonates, alkylbenzenesulfonate, alkylnaphthalene sulfonate, dialkyl succinylsuccinate sulfonate, monoalkyl benzene APEO succinic acid sodium sulfonate, fatty alcohol ethylene oxide adduct sulfonate, alkylphenol formaldehyde condensation product ethylene oxide adduct sulfonate, aliphatic alcohol polyethenoxy base ether, alkylphenol-polyethenoxy base ether, sorbitan fatty acid ester, anhydrous sorbitol aliphatic acid polyethenoxy base ether, alkylphenol formaldehyde condensation product polyoxyethylene groups ether, sulfonation castor-oil plant alkoxide, quaternary ammonium salt derivative, the condensation product of oxirane and nonyl or octyl phenol is main product or hydroxyl and the oxirane that does not dissociate by esterification, the alkalies and alkaline earth salt of sulfuric ester and sulfonic acid is as sulphonyl amber ester dinonyl sodium; The frequent mixed finished product that uses, for example: agricultural newborn 500#, agricultural newborn 602#, agricultural newborn 400#, 8220, NP-10 etc.

Dispersant that adopts in the present composition or wetting agent are the anhydrous sorbierite carboxylates that forms solubility such as the alkali of the macromolecule sulfonic acid derivative of sodium lignin sulfonate (calcium) and alkali salt condensation.Can give an example NNO, dodecyl sodium sulfate arranged, draw back powder, lauryl alcohol polyethylene glycol oxide base ether sulfonic acid sodium, sodium carboxymethyl starch etc.

Can also contain cosolvent, for example DMF, acetone and various alcohols etc. further in the present composition.

Oil in the composition oil-suspending agent of the present invention is vegetable oil as corn oil, soybean oil, levant cotton oil, peanut wet goods.

Composition of the present invention can use by common method, as convert water spray, to various weeds in the corn field for example: dayflower, piemarker, knotweed, acalypha copperleaf, lamb's-quarters, Amaranthus retroflexus, lady's-grass, barnyard grass grass, green foxtail all have good control efficiency, and are difficult for developing immunity to drugs.

Embodiment

Following examples are preferred, but auxiliary composition of the present invention and filler are not limited to following examples.

Embodiment one:

10% mesotrione+6% cyanazine missible oil

Mesotrione 10% (weight)

Cyanazine 6% (weight)

Methyl alcohol 2% (weight)

Farming newborn 500# 5% (weight)

Farming newborn 600# 7% (weight)

1500# 70% (weight)

Embodiment two:

12% mesotrione+8% cyanazine wetting powder

Mesotrione 12% (weight)

Cyanazine 8% (weight)

NNO 4% (weight)

NP-20 16% (weight)

Kaolin 60% (weight)

Embodiment three:

20% mesotrione+4% cyanazine oil-suspending agent

Mesotrione 20% (weight)

Cyanazine 4% (weight)

8,220 13% (weight)

Sodium lignin sulfonate 2% (weight)

Corn oil 61% (weight)

Embodiment four:

10% mesotrione+5% cyanazine oil-suspending agent

Mesotrione 10% (weight)

Cyanazine 5% (weight)

White carbon 4% (weight)

8,220 14% (weight)

Soybean oil 67% (weight)

Embodiment five:

20% mesotrione+20% cyanazine oil-suspending agent

Mesotrione 20% (weight)

Cyanazine 20% (weight)

Sodium carboxymethyl starch 3% (weight)

8,220 11% (weight)

Cottonseed oil 46% (weight)

Drug effect embodiment six:

1, reagent agent

48% mesotrione SC

50% cyanazine WP

The oil-suspending agent that is mixed of 5 different proportionings of mesotrione and cyanazine

?	1?	2?	3?	4?	5?
						Mesotrione	1?	1?	1?	1?	1?
Cyanazine	0.1?	0.2?	0.5?	1?	2?

Annotate: be the weight ratio of effective ingredient in the table

2, examination material: Amaranthus retroflexus

3, assay method: indoor pot method.Carrying out the cauline leaf spraying in the 2 leaf phases of Amaranthus retroflexus handles; 47 liters/mu of the water yields are converted in spraying.Measurement result is the fresh weight inhibiting rate, calculates ED ₉₀Value ED ₅₀Value, vivacity, co-toxicity coefficient etc., the activity of weeding after comparison mesotrione suspending agent and cyanazine wetting powder and they are mixed is determined the most adaptive ratio.

4, result of the test

The activity of weeding of table 1 pair Amaranthus retroflexus is relatively (with ED ₉₀The value meter)

Reagent	Y＝a+blogD?	Correlation coefficient r	ED 90Value gram/mu	Vivacity	The co-toxicity coefficient
						Mesotrione	Y＝6.15+1.82X?	0.994?	0.52?	100?	?
Cyanazine	Y＝4.86+1.27X?	0.992?	0.39?	87?	?
						1?	Y＝5.63+1.59X?	0.971?	0.41?	123?	103.4?
2?	Y＝6.31+2.61X?	0.980?	0.34?	154?	151.7?
						3?	Y＝5.98+2.33X?	0.976?	0.33?	161?	174.5?

4?	Y＝6.04+2.49X?	0.981?	0.32?	136?	153.6?
						5?	Y＝5.86+1.21X?	0.983?	0.37?	118?	108.3?

Table 2 mesotrione and cyanazine are to the herbicide effect of grass

In measuring 5 mixed ratios of two kinds of weed killer herbicides, the back that is mixed is the herbicide effect of synergy and addition to grass as can be seen from the above table.And mesotrione and cyanazine mixture preparation are that mixed ratio is 1: the synergistic effect during 0.2-1 is obvious, and mixed ratio is 1: 0.5 o'clock the best.

Drug effect embodiment seven:

The drug effect contrast (3 days preventive effects behind the medicine) of the present composition and contrast agents

Reagent agent

Using dosage

The piemarker preventive effect, %

The lady's-grass preventive effect, %

The acalypha copperleaf preventive effect, %

The Amaranthus retroflexus preventive effect, %

The green foxtail preventive effect, %

50% cyanazine WP

30g/ mu

76.2?

?88.4?

?69.6?

?83.1?

?90.9?

48% mesotrione SC

30g/ mu

91.4?

?50.8?

?91.7?

?48.5?

?82.1?

Embodiment one

90g/ mu

92.1?

?88.9?

?90.7?

?86.3?

?93.2?

Embodiment two

80g/ mu

88.4?

?83.8?

?81.6?

?78.2?

?83.3?

Embodiment three

60g/ mu

91.6?

?90.1?

?92.0?

?89.6?

?92.8?

Embodiment four

80g/ mu

96.8?

?97.2?

?95.9?

?92.6?

?97.3?

Embodiment five

30g/ mu

90.4?

?91.1?

?91.7?

?90.2?

?90.5?

Claims (8)

1. mesotrione Herbicidal combinations is characterized in that it is made up of as active component mesotrione and cyanazine, and wherein mesotrione and cyanazine weight ratio are 1: 0.2 to 1: 1.

2. according to the composition of claim 1, it is characterized in that mesotrione and cyanazine weight ratio are 1: 0.3 to 1: 0.8.

3. according to the composition of claim 1, it is characterized in that mesotrione and cyanazine weight ratio are 1: 0.5.

4. according to the composition of claim 1, wherein the content of active ingredient in composition is 1-90%.

5. according to the composition of claim 1, it can be mixed with missible oil, wetting powder or oil-suspending agent.

6. according to the composition of claim 5, it can be mixed with oil-suspending agent.

7. according to the oil-suspending agent of claim 6, wherein the weight percentage of active ingredient is 1%～90%; Emulsifier consumption 5%～20%; Dispersant/wetting agent consumption 1%～10%; Oil subsidy foot 100%.

8. according to the purposes of the Herbicidal combinations of claim 1-6, it is characterized in that above-mentioned Herbicidal combinations is used controlling weeds in cornfield.