CN102578122B - Rice field herbicide composition - Google Patents
Rice field herbicide composition Download PDFInfo
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- CN102578122B CN102578122B CN 201110001105 CN201110001105A CN102578122B CN 102578122 B CN102578122 B CN 102578122B CN 201110001105 CN201110001105 CN 201110001105 CN 201110001105 A CN201110001105 A CN 201110001105A CN 102578122 B CN102578122 B CN 102578122B
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- benthiocarb
- butyl
- cyhalofop
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Abstract
The invention relates to a rice field herbicide composition. The rice field herbicide composition comprises 1.0 weight parts of cyhalofop butyl and 7.0-35.0 weight parts of thiobencarb as effective ingredients and agricultural acceptable pesticide adjuvant adapted to the effective ingredients according to dosage forms. The rice field herbicide composition can effectively remove graminaceous weeds, Cyperaceae weeds and broadleaf weeds and has synergistic effect, thus the pesticide cost is reduced, and the times of usage are reduced.
Description
Technical field
The present invention is the improvement to herbicides for use in paddy, and relating in particular to a kind ofly has efficient kill activity to grassy weed (such as moleplant seed, barnyard grass etc.), sedge weed and broad leaved weed, and the weed killer herbicide consumption is few, uses simple Herbicidal compositions for paddy fields.
Background technology
Paddy field weed has developed into a huge plant community, and paddy field weed group is by a large amount of absorptions and predation to light, soil nutrient etc., and the paddy growth situation that seriously weakened has a strong impact on yield and quality of rice.At present the paddy field weed kind is many, and existing grassy weed has again moleplant seed in sedge weed and the broad leaved weed, particularly grassy weed, barnyard grass, lady's-grass crop smothering serious, and the crop smothering emergence period is long.And herbicides for use in paddy all has stronger selectivity usually, good and very poor to another section's weeds herbicidal effect to a certain section weeds herbicidal effect, therefore can only be repeatedly, many kinds, multiple dose medication, excess and pesticide abuse have brought the negative effects such as rice quality decline and environmental pollution, have increased again drug cost.
Cyhalofop-butyl, chemical name (R)-2-[4-(4-itrile group-2-fluorophenoxy) phenoxy group] butyl propionate is unique kind that paddy rice is had tight security in the fragrant phenoxy phenoxy propionic acid weed killer herbicide.Its herbicide mechanism is inner-adsorption conduction-type herbicide, absorbed by plant corpus blade and leaf sheath, the phloem conduction, accumulate in plant corpus meristem zone, suppress acetyl-CoA carboxylase, fatty acid is synthesized stop, cell division can not normally carry out, film system etc. contains ester structure and destroys, and causes at last plant dead.This herbicide, to having relatively high expectations the opportunity of using, only to 5 leaves behind the seedling that is unearthed before the phase grassy weed (for example moleplant seed, barnyard grass) effective, very poor to 5 leaf after date grassy weed herbicidal effects, therefore can only early application, substantially invalid to the grass-seed of being unearthed, namely only seedling has kill activity to being unearthed and to the weeds non-blocking that is unearthed; Secondly, speed of action is slow, generally needed 7-15 days just can make weeds dead, and the lasting period is short, causes the medication number of times more, and medication reaches 2-3 time usually, and dosage is large, 90-150 g/ha of each medication (effective dose); Again, the herbicide spectrum is narrow, and is only effective to grassy weed, invalid to broad leaved weed, sedge weed and other weeds.
Benthiocarb, chemical name N, N-diethyl thiocarbamic acid-S-4-benzyl chloride ester, be thiocarbamates selectivity inner sucting conduction type soil processing herbicide, can be absorbed by weeds root and young shoot, particularly young shoot is transferred in the plant corpus after absorbing, growing point there is very strong inhibitory action, the benthiocarb mechanism of action is considered to hinder α-amylase and protein is synthetic, plant cell mitosis also there is strong inhibitory action, cause the weed seed sprouted and the weeds at the initial stage of sprouting withered, simultaneously owing to moleplant seed in the grassy weed, the speed of barnyard grass Assimilation and conductivity benthiocarb is faster than paddy rice, and the speed of degradation in vivo benthiocarb is slower than paddy rice, and this just forms selectivity physiological foundation gramineous, thereby paddy rice is had safety.In addition, it can generally be distributed in soil 2 centimeters rapidly by adsorption by soil, and less with the moisture content leaching, the half life period in soil, is 2-3 week under the ventilation good condition, thereby the relatively long term of validity is arranged.Yet actual medication is only closed down effect to grass-seed in the soil, and children's grass of the broad leaved weeds such as grassy weed, sedge weed and other Monochoria vaginalis after being unearthed, Drilgrass is prevented heterodyne, because weeds seeding stage disunity, the in addition medication term of validity is still relatively short, therefore medication generally also needs secondary, 1950-3300 g/ha of each medication (effective dose).
Prior art is in order to prevent and kill off rice field grassy weed, broad leaved weed, sedge weed and other weeds, all adopt above-mentioned two kinds of weed killer herbicides are successively used, for example the benthiocarb secondary uses and (to broadcast soil treatment on rear same day, rice shoot 3-4 foliar spray is used), cyhalofop-butyl 1-2 time (the secondary medication is divided in front and back).The two uses respectively, and the one, consumption is high, and the 2nd, use trouble.And because that sedge weed, broad leaved weed go out the grass phase is slow, generally broadcasts rear 10 days to 30 days ability and be unearthed (moleplant seed, barnyard grass were the peak of being unearthed in 3-10 days in the grass family after broadcasting), the medication phase is difficult to take into account.Therefore during actual medication, within the time of infertility, above-mentioned two kinds of medicines all need repeatedly to use.
Although knowing paddy field, people have multiple weeds, and above-mentioned two kinds of agricultural chemicals separately scope of application and pluses and minuses, but from failing both composite uses, because people do not know how above-mentioned two kinds of mixture of herbicides are used with, if arbitrarily composite, because compound proportion and consumption are incorrect, not only may cause herbicidal effect poor, and may cause the generation of poisoning.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide that a kind of mutual synergistic effect is strong, the herbicide performance complement, the drug effect phase is long, and all kinds of weeds in rice field of not being unearthed and being unearthed are all had kill activity, and dosage and the few Herbicidal compositions for paddy fields of medication number of times.
The object of the invention realizes, the main improvement is to adopt cyhalofop-butyl and benthiocarb to determine that in test ratio mixes compositely, again according to different preparation types, selects to add to the two common formulation auxiliary agent of adaptation, thereby overcome above-mentioned the deficiencies in the prior art, realize the object of the invention.Specifically, Herbicidal compositions for paddy fields of the present invention is characterized in that effective ingredient is cyhalofop-butyl and benthiocarb ratio of quality and the number of copies 1.0:7.0-35.0, adds according to formulation simultaneously that agricultural is upper can be accepted and to the insecticides adjuvant of the two common adaptation.
The upper acceptable insecticides adjuvant of agricultural is made of jointly one or more mixtures and surfactant in carrier, adhesive, dispersant, protecting colloid, thickener, thixotropic agent, bleeding agent, stabilizing agent, intercalating agent, dyestuff, colouring agent or the polymer in the herbicidal composition of the present invention.And can make on demand the upper arbitrary acceptable formulations of pesticide of agricultural, formulations such as missible oil, aqueous emulsion, suspending agent, suspended emulsion, wetting powder, water dispersible granules, and making that effective component content is 10-90wt% in each formulation, better effective component content is 20-70wt%.
Below by several use formulation preparation explanations commonly used are embodied the present invention.
The preparation of missible oil: by two kinds of effective ingredient formula rates, respectively former medicine is dissolved in the solvent, adds emulsifier (in case of necessity heating for dissolving), mix and get final product.
The preparation of aqueous emulsion: press formula rate, respectively former medicine is dissolved in the upper acceptable organic solvent of agricultural, after transparent, add surfactant through mechanical agitation, through the composition oil phase that stirs; With defoamer, antifreeze is dissolved in the water, and forms water; Slowly water is added in the oil phase, shear certain hour with high-shear emulsion machine simultaneously, aqueous emulsion gets product.
The preparation of wetting powder
:Former medicine, auxiliary agent, filler are mixed in proportion, behind air-flow crushing, mix again making wetting powder.
The preparation of suspending agent: press formula rate, after former medicine, surfactant, thickener, antifreezing agent, wetting agent and water were mixed, through high speed shear, the wet method sand milling got semi-finished product, added water after the analysis and mixed to filter and get product.
The preparation of water dispersible granules: former medicine, auxiliary agent, filler are mixed in common preparation ratio; through air-flow crushing; then add an amount of water; make the water dispersible granules product through kneading, granulation, drying, screening; the powder that maybe will pulverize sprays water, send grain, dry to go on foot successfully in boiling granulator, sieves to get the water dispersible granules product after going out machine.
Herbicidal composition of the present invention is used for the control paddy field weed, and grass family (such as moleplant seed, barnyard grass etc.), sedge family and other broad leaved weed are had efficient kill activity, has following advantage:
1. the composite use of cyhalofop-butyl and benthiocarb has obvious synergistic effect in the composition, thereby more single use minimizing of consumption, and herbicidal effect is good.Take full advantage of both murderous intention reason effects different, by having reached the effect that " front cover kills " learns from other's strong points to offset one's weaknesses after composite, produced synergistic effect, improved herbicidal effect, control rice field middle and later periods weeds there is obvious effect, after the general dispenser about 30 days, herbicidal effect all was stabilized in more than 93.4%.
2. the herbicide spectrum is wider.Adopt cyhalofop-butyl and the composite use of benthiocarb, benthiocarb has remedied cyhalofop-butyl to broad leaved weed, shortcoming that the sedge weed preventive effect is low, thereby multiple grassy weed, broad leaved weed, sedge weed are all had good herbicidal effect.
3. reduce dosage and spraying times, the dispenser lasting period is long, and a drug can effectively be controlled the paddy field weeds harm in the time of infertility.Compare with the benthiocarb single dose with alone cyhalofop-butyl single dose, do not reducing in the herbicidal effect situation, consumption is reduced to 840-2190 g/ha of built agent consumption by cumulative 2250-3405 g/ha of two single doses, has reduced 36%-59%; Reduce simultaneously spraying times.Thereby effectively reduce the weeding cost, use this built agent cost per mu only to need 4.9-8.1 unit, each expendable cost per mu 7.3-11.7 is first with respect to two single doses, descended approximately 30%, respectively use 2 times cost per mu 14.6-23.4 first with respect to two single doses, descended approximately 60%, significantly reduced the weeding cost.
4. toxicity is low, during use to rice safety, in crop and soil the residence time short, without accumulation toxicity, few to environmental influence.
More detailed effect and advantage can further be understood by embodiment.
Below in conjunction with several specific embodiments; essence of the present invention is further understood in exemplary illustration and help; but the embodiment detail only is for the present invention is described; do not represent the present invention and conceive lower whole technical scheme; therefore should not be construed as the technical scheme restriction total to the present invention, some are In the view of the technical staff, and the unsubstantiality that does not depart from the present invention's design increases and/or change; for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Embodiment
Embodiment 1: effective ingredient is the cyhalofop-butyl benthiocarb missible oil of 90wt%, and wherein cyhalofop-butyl and benthiocarb ratio of quality and the number of copies are 1.0:15.0:
Cyhalofop-butyl 5.6%
Benthiocarb 84.4%
Alkylphenol polyoxyethylene 4.0%
Calcium dodecyl benzene sulfonate 4.0%
Dimethylbenzene complements to 100%
Press the common missible oil method preparation of agricultural chemicals.
Embodiment 2: effective ingredient is the cyhalofop-butyl benthiocarb aqueous emulsion of 50wt%, and wherein cyhalofop-butyl and benthiocarb mass fraction ratio are 1.0:34.7:
Cyhalofop-butyl 1.4%
Benthiocarb 48.6%
Fatty alcohol-polyoxyethylene ether 4.0%
Aliphatic alcohol polyoxyvinethene phosphate 4.0%
Polyvinyl alcohol 5.0%
Ethylene glycol 1.0%
Organosilicon 0.05%
Water complements to 100%
Press the common aqueous emulsion method preparation of agricultural chemicals.
Embodiment 3: effective ingredient is the cyhalofop-butyl benthiocarb suspending agent of 29.5wt%, and cyhalofop-butyl and benthiocarb mass fraction ratio are 1.0:10.0:
Cyhalofop-butyl 2.7%
Benthiocarb 26.8%
Alkyl phenol formaldehyde resin polyoxyethylene ether 2.0%
Lignosulfonates 4.0%
Xanthans 0.15%
Ethylene glycol 3.0%
Water complements to 100%
Press the common suspending agent preparation method preparation of agricultural chemicals.
Embodiment 4: effective ingredient is 22.5% cyhalofop-butyl benthiocarb suspended emulsion, and cyhalofop-butyl and benthiocarb mass fraction ratio are 1.0:27.0:
Cyhalofop-butyl 0.8%
Benthiocarb 21.7%
Alkylphenol polyoxyethylene 5.0%
Calcium lignosulfonate 4.0%
Aluminium-magnesium silicate 1.0%
Glycerine 4.0%
Water complements to 100%
Press the common aqueous suspension method of preparing emulsion preparation of agricultural chemicals.
Embodiment 5: effective ingredient is the cyhalofop-butyl benthiocarb wetting powder of 10wt%, and cyhalofop-butyl and benthiocarb mass fraction ratio are 1.0:19.0:
Cyhalofop-butyl 0.5%
Benthiocarb 9.5%
Lauryl sodium sulfate 1.2%
Naphthalene sulfonic acid-formaldehyde condensation product sodium salt 4.8 %
Precipitated calcium carbonate complements to 100%
Press the common wetting powder preparation method preparation of agricultural chemicals.
Embodiment 6: effective ingredient is 37.6% cyhalofop-butyl benthiocarb water-dispersible granules, and cyhalofop-butyl and benthiocarb mass fraction ratio are 1.0:7.0:
Cyhalofop-butyl 4.7%
Benthiocarb 32.9%
Sodium alkyl sulfate 4.0%
Polycarboxylate 6.0%
Sodium carboxymethyl starch 2.0%
Bentonite 20.0%
Kaolin complements to 100%
Press the common water dispersible granules preparation method preparation of agricultural chemicals.
Annotate: above-mentioned cyhalofop-butyl, benthiocarb all refer to the former medicine of 100% effective ingredient.
Present composition joint toxicity measuring.
1, test site: proving ground, Academy of Agricultural Sciences, Shanghai City.
2, test medicine: cyhalofop-butyl, benthiocarb and composite weedicide of the present invention.
3, test method: in the water direct seeding field rice seedling 3-5 leaf phase, the grass family moleplant seed 1-3 leaf phase, broad leaved weed and sedge weed budding stage, be watered 30 kilograms of spray mists.Drain first water layer before the medication, after the medication every 1 water in the sky, later normal management.Test repeats four times, 20 square metres of residential quarter areas.
4, investigation method: every square metre of residual sum of weeds of investigation in 30 days after the dispenser, calculate strain and count preventive effect.Computing formula:
5, evaluation method: the proportioning screening is used the Colby method and is tested, and formula is E
0=xy/100, the weeds survival rate of weed killer herbicide A when x represents that consumption is P in the formula, y represents that consumption is the weeds survival rate of Q weed killer herbicide B, E
0The theoretical weeds survival rate of weed killer herbicide A+B when the expression consumption is P+Q, E represents the actual weeds survival rate that each is processed.Press the analysis of Colby method, work as E
0-E〉5% the time, illustrate to produce synergistic effect, work as E
0During-E＜-5%, illustrate to produce antagonism, work as E
0-E illustrates to produce addition between ± 5% the time, and result of the test sees Table 1.
The result of the test of cyhalofop-butyl and benthiocarb joint toxicity measuring shows, cyhalofop-butyl and benthiocarb are composite, and the mass fraction ratio of cyhalofop-butyl and benthiocarb all has synergistic effect in the ratio range of 1:7.0-35.0.
Field control effectiveness test.
A. test site: Jiangsu Province's Yixing City zone venereal disease worm observation station, test kind: military fortune polished rice 23, May 30 date of seeding, administration time June 13 is during dispenser, in the direct seading rice seedling 3-4 leaf phase, the weeds 2-4 leaf phase, medicament and contrast agents with embodiment are sprayed respectively, and area 20 ㎡ in residential quarter repeat 4 times.Investigation in 15 days is counted preventive effect to the strain of weeds after medication, and result of the test sees Table 2.The preventive effect computing formula:
Wherein composite former medicine is cyhalofop-butyl and benthiocarb.All in the normal amount of application scope of the Institute for the Control of Agrochemicals of the Ministry of Agriculture,PRC's registration, two single doses all are commercially available prod to the amount of application of cyhalofop-butyl single dose and benthiocarb single dose.
Can be found out by result of the test, cyhalofop-butyl and benthiocarb are composite, and the mass fraction ratio of cyhalofop-butyl and benthiocarb has synergistic effect in 1.0:7.0-35.0, not only grassy weed there is special preventive effect, and broadleaved herb, sedge weed are also had preferably preventive effect.
Test site: Jiangsu Province's Yixing City zone venereal disease worm observation station, experiment and demonstration kind: military fortune polished rice 23, June 9 date of seeding, administration time June 23.During dispenser, in the direct seading rice seedling 3-4 leaf phase, the weeds 2-4 leaf phase, spray respectively with medicament and the contrast agents of embodiment, Da Qu area 333 ㎡ do not establish repetition, and investigation in 30 days is counted preventive effect to the strain of weeds after medication, and result of the test sees Table 3.The preventive effect computing formula:
Wherein composite former medicine is cyhalofop-butyl and benthiocarb.All in the normal amount of application scope of the Institute for the Control of Agrochemicals of the Ministry of Agriculture,PRC's registration, two single doses all are commercially available prod to the amount of application of cyhalofop-butyl single dose and benthiocarb single dose.
Can be found out by result of the test, cyhalofop-butyl and benthiocarb are composite, the mass fraction ratio of cyhalofop-butyl and benthiocarb is in 1.0:7.0-35.0, has synergistic effect, average preventive effect is all more than 94.5%, not only grassy weed there is special preventive effect, and broad leaved weed and sedge weed are also had preferably preventive effect.
Range estimation in 3 days, 7 days, 15 days is managed the growth of water in field rice everywhere normally after the medication, without obviously harmful effect, the medication district compares with not medication district (CK), and rice leaf and growing way all without unusual phenomenon, show that the composite herbicidal composition of cyhalofop-butyl and benthiocarb application security on paddy rice is good.
Claims (4)
1. Herbicidal compositions for paddy fields is characterized in that effective ingredient is cyhalofop-butyl and benthiocarb ratio of quality and the number of copies 1.0:7.0-35.0, adds according to formulation simultaneously that agricultural is upper can be accepted and to the insecticides adjuvant of the two common adaptation; Described formulation is missible oil, aqueous emulsion, suspending agent, suspended emulsion, wetting powder, water dispersible granules.
2. described Herbicidal compositions for paddy fields according to claim 1 is characterized in that effective component content is 10-90wt% in the formulation.
3. described Herbicidal compositions for paddy fields according to claim 2 is characterized in that effective component content is 20-70wt% in the formulation.
4. described Herbicidal compositions for paddy fields is characterized in that 840-2190 g/ha of composition built agent consumption for the purposes of control paddy field weed according to claim 1.
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| CN 201110001105 CN102578122B (en) | 2011-01-05 | 2011-01-05 | Rice field herbicide composition |
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| CN102578122B true CN102578122B (en) | 2013-10-16 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102027954A (en) * | 2011-01-06 | 2011-04-27 | 陕西韦尔奇作物保护有限公司 | Herbicide composition containing yhalofop-butyl and thiocarbamate |
| CN103202290B (en) * | 2013-05-07 | 2014-04-16 | 中化化工科学技术研究总院 | Cyhalofop-butyl suspending agent and preparation method thereof |
| CN105123720A (en) * | 2015-08-28 | 2015-12-09 | 陕西上格之路生物科学有限公司 | Ternary weeding composite containing penoxsulam |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302203A1 (en) * | 1987-08-05 | 1989-02-08 | Dowelanco | Herbicidal fluorophenoxyphenoxyalkanoic acids and derivatives thereof |
| CN1309533A (en) * | 1998-07-16 | 2001-08-22 | 阿温提斯作物科学有限公司 | Herbicidal composition |
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2011
- 2011-01-05 CN CN 201110001105 patent/CN102578122B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302203A1 (en) * | 1987-08-05 | 1989-02-08 | Dowelanco | Herbicidal fluorophenoxyphenoxyalkanoic acids and derivatives thereof |
| CN1309533A (en) * | 1998-07-16 | 2001-08-22 | 阿温提斯作物科学有限公司 | Herbicidal composition |
Non-Patent Citations (1)
| Title |
|---|
| 江苏农业科技报.直播稻田适用除草剂（下）.《江苏农业科技报》.2006,第1-2页. * |
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