CN108990998A - A kind of Herbicidal combinations and its application containing trichlopyr and pyroxsulam - Google Patents
A kind of Herbicidal combinations and its application containing trichlopyr and pyroxsulam Download PDFInfo
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- CN108990998A CN108990998A CN201810980141.2A CN201810980141A CN108990998A CN 108990998 A CN108990998 A CN 108990998A CN 201810980141 A CN201810980141 A CN 201810980141A CN 108990998 A CN108990998 A CN 108990998A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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Abstract
The invention discloses a kind of Herbicidal combinations, and by trichlopyr and pyroxsulam according to weight ratio (9.375~150): 1 proportion forms.The invention also discloses application of the above-mentioned Herbicidal combinations in prevention and control wheat weeds.Two kinds of medicaments can efficiently kill Different groups weeds respectively, and have apparent synergistic effect after being used in compounding, and accelerate drug effect to play, reduce herbicide dosage, to improve the safety to wheat.Two kinds of medicine component degrass spectrums are complementary, and mixed rear degrass spectrum can effectively cover various wheatland common weeds, and have high activity to the extremely refractory resistant weed of wheatland and elder weed, and market potential is huge.
Description
Technical field
The invention belongs to agricultural technology fields, and in particular to a kind of Herbicidal combinations and its application.
Background technique
China is the maximum country of wheat yield in the world, about 2418.7 ten thousand hectares of annual wheat cultivated area (3.6 hundred million mu),
Produce about 1.3 hundred million tons of wheat per year, cultivated area and yield account for 14.5% He of China crop sowing gross area and total output respectively
20.9%.Thereby it is ensured that wheat stable yields and Quality Safety are one of the basic tasks of China's planting industry.Weed infestation is that wheat is planted
One of primary biological disaster faced in training, even if taking various prevention and control measures, the yield that wheat weeds harm directly results in is damaged
Quenched 18%.It is at present still the most important means of China's wheatland crop smothering prevention and control, cornfield herbicidal by using herbicide weeding
Agent dosage increases year by year, and wheat planting family is higher and higher to cornfield herbicidal drug cost budget, to cornfield herbicidal new product
It is in urgent need.
There is an urgent need to lasting progress cornfield herbicidal varieties distributions in China.On the one hand, China's wheat weeds are to a variety of weedings
The resistance of agent constantly aggravates and breaks out in flakes harm, and new herbicide kind is needed to come into operation.China's wheatland is bright at present
The antiweed weeds really registered have 13 kinds of , Bao Kuo Wang grass (Beckmannia syzigachne), Alopecurus
It is (Alopecurus japonicus), amur foxtail (Alopecurus aequalis), caput careless (Polypogon fugax), hard
Grass (Sclerochloa dura), clearvers (Galium aparine), common vetch (Vicia sativa), shepherd's purse
(Capsella bursa-pastoris), corn gromwell (Lithospermum arvense), Descurainia sophia (Descurainia
Sophia), ox chickweed (Myosoton aquaticum), herba stellariae mediae (Stellaria media), indian rorippa herb (Rorippa
indica)；Herbicide involved in these resistant weeds be mainly aryloxyphenoxypropionate class fenoxapropPethyl and
The pinoxaden of clodinafop-propargyl, neophyl pyrazolines, tribenuron-methyl, the mesosulfuron of sulfonylurea.What resistant weed was related to removes
Careless agent is based on cauline leaf process agent, in this way, which the wheatland for weeds stem and leaf treatment after seedling can catch the flap with herbicide kind and see
Elbow.There is an urgent need to efficiently and safely solve the problems, such as wheatland crop smothering in more practical herbicide type investment Wheat Productions for we
While, delay weeds to break out resistance to existing medicament.On the other hand, efficient, safety, low-risk herbicide product are constantly researched and developed
The herbicide kind that kind substitution dosage is big, residual is high, security risk is high had both met Demand of Nation and market trend.
Trichlopyr is pyridine oxycarboxylic acid class inner sucting conduction type low toxicity herbicide, and also known as lid fills energy, Triclopyr.By
The blade face of plant and root system absorb, and complete stool is transmitted in plant, cause its root, stem, leaf deformity, and reserve substance exhausts,
For vascular bundle by embolism or rupture, plant is gradually dead.Weeding is gone out fillings before afforesting suitable for forest, and maintenance fire line is helped and educates pine tree
And stand conversion, broadleaf weeds and xylophyta are prevented and kill off for bare place.Sensibility of the gramineae plant to trichlopyr
It is lower, there is drug resistance.Trichlopyr can be decomposed in the soil by edaphon, and half-life period is 30-46 days.
Pyroxsulam is inner sucting conduction type triazolopyrimidine sulfonamides herbicide, in wheatland as stem and leaf treatment after seedling agent
Use, active superelevation can effectively prevent and kill off a variety of grass family and broadleaf class wheat weeds, as amur foxtail, Alopecurus, hard grass,
Wild avena sativa, shepherd's purse, ox chickweed etc., however the performance of pyroxsulam drug effect is slower, and since pyroxsulam has super-active,
Wheat paddock is larger using limiting.
Summary of the invention
Technical problem to be solved by the invention is to provide it is a kind of can efficiently and safely control of weed in wheat field weeding group
Close object.
The present invention also technical problems to be solved are to provide the application of above-mentioned Herbicidal combinations.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of Herbicidal combinations, by trichlopyr and pyroxsulam according to weight ratio (9.375~150): 1 proportion
Composition.
Preferably, the weight ratio of trichlopyr and pyroxsulam is (9.375~75): 1.
It is furthermore preferred that the weight ratio of trichlopyr and pyroxsulam is (18.75~75): 1.
Application of the above-mentioned Herbicidal combinations in control of weed in wheat field is also within protection scope of the present invention.
Wherein, the weeds are gramineae weed or broad leaved weeds, and Bao is included but Bu Xian Yu Wang grass, amur foxtail, Japan
The wheatlands such as amur foxtail, clearvers, field thistle, ox chickweed, shepherd's purse, Descurainia sophia common weed and intractable weed.
In addition, Herbicidal combinations antagonism weed control of the invention is significant.
In use, can be used in the 2 leaf phase of wheat or before wheat is turned green to jointing.
The utility model has the advantages that this re-compounded binary herbicide has the advantage that compared with existing wheatland Common Herbicides
(1) there is synergistic effect, two kinds of medicaments can efficiently kill Different groups weeds respectively, and have after being used in compounding bright
Aobvious synergistic effect.
(2) two kinds of medicine component degrass spectrums are complementary, and mixed rear degrass spectrum can effectively cover grass family, broad leaved weeds, wrap
The various common weeds of wheatlands such as Kuo Wang grass, amur foxtail, Alopecurus, clearvers, field thistle, ox chickweed, shepherd's purse, Descurainia sophia.
(3) pyroxsulam dosage is greatly reduced, improves the safety to wheat.
(4) it can be used for resistant weed improvement, two kinds of composite reagents can effectively administer the anti-aryloxy group benzene oxygen that wheatland causes disaster
The gramineae weed of base propionic acid ester, neophyl pyrazolines etc. acetyl-CoA carboxylases (ACCase) inhibitor herbicides and
The broadleaf weeds of the acetolactate synthases such as anti-sulfonylurea (ALS) inhibitor class herbicide.
(5) two kinds of composite reagents can greatly speed up the performance to pyroxsulam drug effect, 15 days weeds after optimal dose medication
Mortality, 30 days weeds are substantially withered after medicine.Wheat can be made quickly to set up the competitive advantage to weeds in wheat paddock application,
It lays the foundation for High-yield Wheat.
Specific embodiment
According to following embodiments, the present invention may be better understood.However, as it will be easily appreciated by one skilled in the art that real
It applies content described in example and is merely to illustrate the present invention, without sheet described in detail in claims should will not be limited
Invention.
Embodiment 1: trichlopyr pyroxsulam compounding agent formulation ratio screening test.
In order to screen the optimum formula proportion of trichlopyr and pyroxsulam, interior progress is a series of in the controlled environment chamber
Whole strain bioassay.
1.1 for trying weeds: Wang grass, amur foxtail, clearvers, field thistle.In weeds control, wheat weeds are generally divided into two
Major class: gramineae weed, broadleaf weeds.This test is that current wheatland endangers serious malignant weed for this 4 kinds of grass of examination,
Zhong Wang grass, amur foxtail represent wheatland grass family malignant weed；Clearvers, field thistle represent wheatland broadleaf class malignant weed.
1.2 binary built agent prescriptions match the setting of screening test drug dose:
1) each single dose setting is as follows:
Trichlopyr (A): 0 (A0), 37.5 (A37.5), 75 (A75), 150 (A150) g a.i./hm2；
Pyroxsulam (B): 0 (B0), 1 (B1), 2 (B2), 4 (B4) g a.i./hm2。
2) binary built agent prescription proportion screening dosage setting is as shown in table 1:
Table is arranged in 1 binary built agent prescription of table proportion screening dosage
1.3 test method
It is cultivated in the square plastic plant that specification is 7 × 7 × 7cm and is packed into the organoclay that herbicide was not used in flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.Select full seed Wang grass, amur foxtail, clearvers, field thistle
Seed, each small flower sow 20, cover one layer of fine earth (thickness about 3mm) on seed in small flower.Small flower is put into 44
The thickening plastics transferring box (clear water for being previously added 2cm depth) of × 33 × 10cm, is placed in phjytotron and cultivates, 15 DEG C of illumination
12 hours, 10 DEG C dark 12 hours, keep 0.5cm-1cm water layer logical in order to the soil in small whitepack in transferring box during test
It crosses water suction and keeps wet.Sowing starts after 20 days to each small flower final singling, and each small flower retains the best children of 12 plants of growing ways
Seedling.Each processing repeats 4 small flowers.Wang grass and amur foxtail seedling grow to 3-4 leaf phase, clearvers and field thistle seedling and grow to 6-
Herbicide treatment is carried out using cauline leaf spray-on process when 8 leaf phase, control group sprays equivalent clear water.By spraying using Yangzhou University's gardening with
The walking gesture voltage stabilization spray tower of plant protection institute is sprayed, spray height 20cm, flat Fan spray head spraying swath 50cm, pressure
200KPa.It is 45L water/hm that spray liquid measure, which corresponds to field spouting liquid,2.After application 45 days, acquires respectively and weigh each little Hua
For trying weeds overground part fresh weight in basin.
Calculate the fresh weight inhibition rate (E) of weeds between single dose and binary built different disposal, theoretical fresh weight inhibition rate (E0)。
Using Gowing method by comparing E and E0The synergy type of value evaluation re-compounded binary herbicide.
Survey fresh weight inhibition rate (E)=(control group fresh weight-processing group fresh weight) ÷ control group fresh weight × 100%
Theoretical fresh weight inhibition rate (E0)=(X+Y-XY) × 100%
E in formula0Theoretical fresh weight inhibition rate after compounding for herbicide trichlopyr with pyroxsulam, X are trichlorine pyrrole
The actual measurement fresh weight inhibition rate of fluoroacetic acid single dose, Y are the actual measurement fresh weight inhibition rate of pyroxsulam single dose.
Work as E-E0Indicate that two kinds of mixture of herbicides have synergistic effect when > 10%；Work as E-E0Two kinds of weedings are indicated when < -10%
Agent compounding has antagonism；E-E0Value between -10% to 10% then for be added effect.
1.4 test result
1) synergy of trichlopyr and pyroxsulam Dui Wang grass
The actual measurement fresh weight inhibition rate E (%) of the trichlopyr pyroxsulam compounding agent Dui Wang grass of 2 different ratio of table
The theoretical fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent Dui Wang grass of 3 different ratio of table0(%)
"/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) it is equal to actual measurement fresh weight inhibition rate (E), synergy is not present
The trichlopyr of 4 different ratio of table and the synergy value [(E-E0) × 100] of pyroxsulam Dui Wang grass
Note: E-E0> 10% indicates synergistic effect "/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) fresh equal to surveying
Synergy is not present in weight inhibiting rate (E)
As shown in Table 2, trichlopyr single dose 150g a.i./hm2When inhibiting rate less than 8%；Pyroxsulam single dose 4g
a.i./hm2When fresh weight inhibition rate be 28%, thus calculate the theoretical inhibiting rate that uses of two kinds of mixture of herbicides and be shown in Table 3.Pass through ratio
Compared with the actual measurement inhibiting rate and theoretical inhibiting rate under two kinds of herbicide difference compounded combinations, and then two kinds of herbicides are investigated to barnyard grass
Synergy is shown in Table 4, as a result, it has been found that having apparent synergy, trichlopyr in trichlopyr and pyroxsulam
37.5-150g a.i./hm2With pyroxsulam 1-4g a.i./hm2Between various dose combination to show actual measurement inhibiting rate super
Theoretical 10% or more inhibiting rate out, that is, show synergistic effect.
2) synergy of trichlopyr and pyroxsulam to amur foxtail
Actual measurement fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 5 different ratio of table to amur foxtail
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 6 different ratio of table to amur foxtail0
(%)
"/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) it is equal to actual measurement fresh weight inhibition rate (E), synergy is not present
The synergy value [(E-E0) × 100] of the trichlopyr of 7 different ratio of table and pyroxsulam to amur foxtail
Note: E-E0> 10% indicates synergistic effect "/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) fresh equal to surveying
Synergy is not present in weight inhibiting rate (E)
As shown in Table 5, trichlopyr single dose is to amur foxtail almost without inhibitory effect；Pyroxsulam single dose 4g
a.i./hm2When fresh weight inhibition rate be more than 40%, thus calculate the theoretical inhibiting rate that uses of two kinds of mixture of herbicides and be shown in Table 6.Pass through
Compare actual measurement inhibiting rate under two kinds of herbicide difference compounded combinations and theoretical inhibiting rate, and then investigates two kinds of herbicides to seeing wheat
The synergy of ma is shown in Table 7, as a result, it has been found that having apparent synergy, trichlorine pyrrole oxygen in trichlopyr and pyroxsulam
Acetic acid 37.5-150g a.i./hm2With pyroxsulam 1-4g a.i./hm2Between various dose combination show actual measurement inhibit
Rate exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
3) synergy of trichlopyr and pyroxsulam to clearvers
Actual measurement fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 8 different ratio of table to clearvers
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 9 different ratio of table to clearvers0
(%)
"/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) it is equal to actual measurement fresh weight inhibition rate (E), synergy is not present
The synergy value [(E-E0) × 100] of the trichlopyr of 10 different ratio of table and pyroxsulam to clearvers
Note: E-E0> 10% indicates synergistic effect "/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) fresh equal to surveying
Synergy is not present in weight inhibiting rate (E)
As shown in Table 8, trichlopyr single dose is inhibited to clearvers, 150g a.i./hm2When inhibiting rate
34%；Pyroxsulam single dose is not so good as the former to clearvers inhibitory effect, 4g a.i./hm2When fresh weight inhibition rate be 28%, thus
It calculates the theoretical inhibiting rate that two kinds of mixture of herbicides use and is shown in Table 9.By comparing the reality under two kinds of herbicide difference compounded combinations
Inhibiting rate and theoretical inhibiting rate are surveyed, and then investigates two kinds of herbicides and 10 is shown in Table to the synergy of clearvers, as a result, it has been found that three
Chlorine pyrrole fluoroacetic acid and pyroxsulam have apparent synergy, trichlopyr 37.5-150g a.i./hm2With pyridine sulphur grass
Amine 1-4g a.i./hm2Between various dose combination show actual measurement inhibiting rate and exceed theoretical 10% or more inhibiting rate, i.e. table
Reveal synergistic effect.
4) synergy of trichlopyr and pyroxsulam to field thistle
Actual measurement fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 11 different ratio of table to field thistle
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyroxsulam compounding agent of 12 different ratio of table to field thistle0
(%)
"/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) it is equal to actual measurement fresh weight inhibition rate (E), synergy is not present
The synergy value [(E-E0) × 100] of the trichlopyr of 13 different ratio of table and pyroxsulam to field thistle
Note: E-E0> 10% indicates synergistic effect "/": the lower theoretical fresh weight inhibition rate (E of single dose processing0) fresh equal to surveying
Synergy is not present in weight inhibiting rate (E)
As shown in Table 11, trichlopyr single dose 150g a.i./hm2Handle the fresh weight inhibition rate to field thistle seedling
Reach 38%；Pyroxsulam single dose 4g a.i./hm2Lower fresh weight inhibition rate 32% is handled, thus calculating two kinds of mixture of herbicides makes
Theoretical inhibiting rate is shown in Table 12.Inhibit by comparing the actual measurement inhibiting rate under two kinds of herbicide difference compounded combinations with theoretical
Rate, and then investigate two kinds of herbicides and 13 are shown in Table to the synergy of field thistle, as a result, it has been found that in trichlopyr and pyridine sulphur grass
Amine has apparent synergy, trichlopyr 37.5-150g a.i./hm2With pyroxsulam 1-4g a.i./hm2Between
Various dose combination shows actual measurement inhibiting rate and exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
1.6 conclusion (of pressure testing)
4 kinds of weeds that this research is selected are that Qi Zhong of the common malignant weed , of wheatland Wang grass, amur foxtail represent wheatland grass
Section's malignant weed；Clearvers, field thistle represent wheatland broadleaf class malignant weed.In summary result of study shows trichlorine pyrrole oxygen
Acetic acid and pyroxsulam, which are used in compounding, all has inhibitory effect and synergy effect outstanding for all kinds of weeds.
Further analyze the proportion of trichlopyr and pyroxsulam compounded formula, trichlopyr 37.5-150g
a.i./hm2With pyroxsulam 1-4g a.i./hm2Various combination compoundings show synergy, therefore, trichlopyr and pyridine
The ratio range of sulphur grass amine is: trichlopyr: pyroxsulam=(9.375~150): 1.
Trichlopyr 37.5-150g a.i./hm2With pyroxsulam 2-4g a.i./hm2The connection of various combination compoundings
Close threshold (E-E0) 25% or more, therefore, the more optimized ratio range of trichlopyr and pyroxsulam is: trichlorine
Pyrrole fluoroacetic acid: pyroxsulam=(9.375~75): 1.
Trichlopyr 75-150g a.i./hm2With pyroxsulam 2-4g a.i./hm2The joint of various combination compoundings
Threshold (E-E0) 35% or more, therefore, the more optimized ratio range of trichlopyr and pyroxsulam is: trichlorine pyrrole
Fluoroacetic acid: pyroxsulam=(18.75~75): 1.
Embodiment 2: trichlopyr pyroxsulam compounding agent measures Safe to wheat
In order to measure safety of the compounding agent to wheat of trichlopyr pyroxsulam, in the controlled environment chamber in into
A series of whole strain bioassay of row.Based on front as a result, with trichlopyr: pyroxsulam=37.5: 1 proportion is used for wheat
Safety testing.
2.1 for studying object: raising wheat 23, Jimai 22.Wherein raising wheat 23 is suitable for planting in In Middle And Lower Reaches of Changjiang River, and Jimai 22 is suitable
Suitable Northern Area of Huaihe River and the plantation of varieties in Huang-Huai-Hai Plain north piece.
2.2 dosage setting: trichlopyr+pyroxsulam: 0+0,75+2,150+4,300+8g a.i./hm2
2.3 test methods:
To Safe to wheat test respectively detection trichlopyr pyroxsulam compounding agent to the wheat 2-3 leaf phase, point
The safety in tiller latter stage (before the jointing stage, stem starts jointing, jointing length < 1cm).
In the plastic casing that specification is 22 × 15 × 10cm, it is packed into and the organoclay of herbicide was not used (pH value 6.5, has
Machine matter content 2.4%), soil layer height about 8cm in each box, plastic casing lower part is punched in order to absorb water.Plastic casing is put into 44
The thickening plastics transferring box (clear water for being previously added 2cm depth) of × 33 × 10cm, is placed in phjytotron and cultivates, 15 DEG C of illumination
12 hours, 10 DEG C dark 12 hours, keep about 0.5cm water layer in order to which the soil in plastic casing passes through in transferring box during test
Water suction keeps wet.Each processing repeats 4 plastic casings.Stem is carried out before wheat 2-3 leaf phase, late tillering state start jointing respectively
Leaf processing, control group spray equivalent clear water.The walking gesture voltage stabilization spray of Yangzhou University's gardening and plant protection institute is used by spraying
Tower is sprayed, spray height 20cm, flat Fan spray head spraying swath 50cm, pressure 200KPa.Spray liquid measure corresponds to field hydrojet
Amount is 45L water/hm2.After application 45 days, acquires and weighed in each plastic casing for trying wheat overground part fresh weight respectively, calculated not
With the fresh weight inhibition rate for handling top over the ground.
Fresh weight inhibition rate=(control group fresh weight-processing group fresh weight) ÷ control group fresh weight × 100%
2.4 test result
Lower influence of the trichlopyr pyroxsulam compounding agent to wheat aerial part fresh weight of various dose processing is shown in
Table 14, the results showed that, trichlopyr pyroxsulam is according to each for having under amount of reagent to wheat of 37.5: 1 proportion compounding agents
There is preferable safety, < 10% equal to wheat fresh weight inhibition rate.
3 trichlopyr pyroxsulam compounding agent of table is to wheat overground part fresh weight inhibition rate
*: dosage is trichlopyr+pyroxsulam dosage.
2.5 conclusion (of pressure testing)
Trichlopyr pyroxsulam compounds 77-308g a.i./hm according to 37.5: 1 proportion2To small under processing
Preferable safety was all had before wheat 2-3 leaf phase and tiller last jointing stage.
The inhibiting effect of 3 trichlopyr pyroxsulam compounding agent antagonism weeds of embodiment measures
Serious antiweed weeds are endangered to wheatland in order to measure the compounding agent of trichlopyr pyroxsulam
Inhibiting effect, it is interior in the controlled environment chamber to carry out a series of whole strain bioassay.Comprehensively consider and the inhibiting rate and medicament of weeds are subtracted
The principle used is measured, with trichlopyr: pyroxsulam=37.5: 1 proportion is for testing.
3.1 for trying weeds: anti-Jing dislikes azoles dogstail Ling Wang grass, anti-fenoxapropPethyl Alopecurus, anti-tribenuron-methyl and broadcasts ma
Wormwood artemisia, anti-tribenuron-methyl ox chickweed, anti-tribenuron-methyl shepherd's purse, Chang Gui Wang grass, conventional Alopecurus, conventional Descurainia sophia, conventional ox chickweed,
Conventional shepherd's purse.FenoxapropPethyl is aryloxyphenoxypropionate class herbicide, be wheat paddock dosage is maximum, application range most
Wide gramineae weed cauline leaf process herbicide；Tribenuron-methyl is sulfonylurea herbicide, wealthy for the prevention and control of various regions wheat paddock for a long time
Leaf weeds.Another aspect , Wang grass, Alopecurus, Descurainia sophia, ox chickweed and shepherd's purse are that China's wheatland sends out herbicide resistance
The malignant weed of raw most serious.Therefore, the present embodiment is for trying object with above-mentioned Weed Resistance population, is pair with conventional population
According to further research trichlopyr pyroxsulam is used for the potentiality that wheat paddock resistant weed is administered.
The setting of 3.2 doses:
Trichlopyr+pyroxsulam: 300+8g a.i./hm2
FenoxapropPethyl: 90g a.i./hm2。
Tribenuron-methyl: 22.5g a.i./hm2。
3.3 test methods:
It is cultivated in the square plastic plant that specification is 7 × 7 × 7cm and is packed into the organoclay that herbicide was not used in flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.Select full seed for trying weed seed, each small flower broadcasts
Kind 20.One layer of fine earth (thickness about 3mm) is after planting covered on seed.Small flower is put into the thickening plastics of 44 × 33 × 10cm
Transferring box (clear water for being previously added 2cm depth), is placed in phjytotron and cultivates, and 15 DEG C of illumination 12 hours, 10 DEG C of dark 12 are small
When, keep 0.5cm or so water layer to keep wet by water suction in order to the soil in small whitepack in transferring box during test.15 days
After start to each small flower final singling, each small flower retains the best seedling of 12 plants of growing ways.Each processing repeats 4 little Hua
Basin.Wang grass and Alopecurus 3-4 leaf phase, Descurainia sophia, ox chickweed and shepherd's purse 6-8 leaf phase are using cauline leaf spray-on process progress herbicide
Processing, control group spray equivalent clear water.The walking gesture voltage stabilization spray tower of Yangzhou University's gardening and plant protection institute is used by spraying
It is sprayed, spray height 20cm, flat Fan spray head spraying swath 50cm, pressure 200KPa.Spray liquid measure corresponds to field spouting liquid
For 45L water/hm2。
After application 45 days, acquires and weighed in each plastic casing for trying plant above ground portion fresh weight respectively, calculate different disposal
To the fresh weight inhibition rate of overground part.
Fresh weight inhibition rate=(control group fresh weight-processing group fresh weight) ÷ control group fresh weight × 100%
3.4 test result
The lower trichlopyr pyroxsulam compounding agent of various dose processing is to the weeds aerial part fresh weight for examination
Influence is shown in Table 15 and table 16, the results showed that, trichlopyr pyroxsulam compounding agent is in 300+8g a.i./hm2At dosage
Reason can effectively kill each resistant weed population and conventional weed population after 45 days, and combine the result of study of front, this test
In trichlopyr and pyroxsulam compounding agent dose under to wheat safety.
The different herbicide antagonism of table 15 and Chang Gui Wang grass and the overground part fresh weight inhibition rate (%) of day too amur foxtail
The overground part fresh weight inhibition rate (%) of table 16 different herbicide antagonism and conventional broadleaf weeds
3.5 conclusion (of pressure testing)
Trichlopyr pyroxsulam can be used for the improvement of wheat paddock resistant weed, can be not only used for Chang Gui Wang grass,
The prevention and treatment of Alopecurus, Descurainia sophia, ox chickweed, shepherd's purse, it can also be used to relevant resistant population prevention and control.
Embodiment 4: the quick-acting measurement of trichlopyr pyroxsulam compounding agent prevention and control weeds
In order to detect the quick-acting of trichlopyr pyroxsulam compounding agent management of weeds, in the controlled environment chamber in into
A series of whole strain bioassay of row.Front is the result shows that trichlopyr 300g a.i./hm2+ pyroxsulam 8g a.i./hm2
Various weeds can effectively be killed and to wheat safety, therefore this research is careless using this dosage as trichlopyr pyridine sulphur
The dosage of amine compounding agent is arranged.
4.1 for trying weeds: Wang grass, amur foxtail, shepherd's purse, Descurainia sophia.Qi Zhong Wang grass, amur foxtail represent wheat paddock grass family evil
Property weeds；Shepherd's purse, Descurainia sophia represent wheat paddock broadleaf class malignant weed.
The setting of 4.2 doses:
T1: trichlopyr 300g a.i./hm2
T2: trichlopyr 300g a.i./hm2+ pyroxsulam 8g a.i./hm2
T3: pyroxsulam 8g a.i./hm2
T4: clear water control
4.3 test methods:
It is cultivated in the square plastic plant that specification is 7 × 7 × 7cm and is packed into the organoclay that herbicide was not used in flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.Select full seed Wang grass, amur foxtail, shepherd's purse, Descurainia sophia kind
Son, each small flower sow 20.The thickening plastics transferring box that small flower is put into 44 × 33 × 10cm (is previously added 2cm depth
Clear water), be placed in phjytotron and cultivate, 15 DEG C of illumination 12 hours, 10 DEG C dark 12 hours, protected in transferring box during test
0.5cm or so water layer is held in order to which the soil in small whitepack keeps wet by water suction.It is fixed to each small flower to start after 15 days
Seedling, each small flower retain the best seedling of 12 plants of growing ways.Each processing repeats 4 small flowers.
Wang grass and Alopecurus 3-4 leaf phase, Descurainia sophia, ox chickweed and shepherd's purse 6-8 leaf phase are carried out using cauline leaf spray-on process
Herbicide treatment, control group spray equivalent clear water.The walking gesture pressure stabilizing of Yangzhou University's gardening and plant protection institute is used by spraying
Spray tower is sprayed, spray height 20cm, flat Fan spray head spraying swath 50cm, pressure 200KPa.Spray liquid measure corresponds to field
Spouting liquid is 45L water/hm2。
After application 15 days, 30 days, 60 days, acquires and weighed in each small flower for trying weeds overground part fresh weight, meter respectively
Calculate aerial part fresh weight inhibition rate.
4.4 test result
Different disposal herbicide using latter 15 days, 30 days and 60 days to the fresh weight inhibition rate of various weeds be shown in Table 17, table 18,
Table 19.The result shows that trichlopyr compounds the quick-acting that can greatly promote herbicide with pyroxsulam, especially it is administered
After 15 days.The inhibiting rate after medication 15 days as the result is shown of table 17, to gramineae weed and Cyperaceae under two kinds of medicament single doses processing
The preventive effect of weeds is not high, however has great synergistic effect when being used in compounding.It the results are shown in Table 18 Hes within 30 days after medication
Table 19, as a result also indicates that, trichlopyr is compounded with pyroxsulam substantially drug effect to be accelerated to play, and trichlorine pyrrole oxygen second
Acid compounds the herbicide dosage that can be substantially reduced with pyroxsulam.
The different herbicide applications of table 17 are after 15 days to the fresh weight inhibition rate (%) for trying weeds
T1: trichlopyr 300g a.i./hm2；T2: trichlopyr 300g a.i./hm2+ pyroxsulam 8g
a.i./hm2；T3: pyroxsulam 8g a.i./hm2.
The different herbicide applications of table 18 are after 30 days to the fresh weight inhibition rate (%) for trying weeds
T1: trichlopyr 300g a.i./hm2；T2: trichlopyr 300g a.i./hm2+ pyroxsulam 8g
a.i./hm2；T3: pyroxsulam 8g a.i./hm2.
The different herbicide applications of table 19 are after 60 days to the fresh weight inhibition rate (%) for trying weeds
T1: trichlopyr 300g a.i./hm2；T2: trichlopyr 300g a.i./hm2+ pyroxsulam 8g
a.i./hm2；T3: pyroxsulam 8g a.i./hm2.
4.5 conclusion (of pressure testing)
Trichlopyr is compounded with pyroxsulam can greatly promote drug effect, and target weeds are largely withered after application 15 days
Extremely.Wheat Seedling gets rid of weed competition as early as possible, forms enough tillers early and jointing envelope row (thoroughly establishes the competition to weeds
Advantage) it is most important, it is the basis of High-yield Wheat.Therefore, this test result shows trichlopyr pyroxsulam compounding
With great application value.
Claims (7)
1. a kind of Herbicidal combinations, which is characterized in that it by trichlopyr and pyroxsulam according to weight ratio (9.375~
150): 1 proportion composition.
2. Herbicidal combinations according to claim 1, which is characterized in that trichlopyr and pyroxsulam trichlorine pyrrole oxygen
The weight ratio of acetic acid and pyroxsulam is (9.375~75): 1.
3. Herbicidal combinations according to claim 1, which is characterized in that the weight ratio of trichlopyr and pyroxsulam
For (18.75~75): 1.
4. application of the Herbicidal combinations described in claim 1 in prevention and control wheat weeds.
5. application according to claim 4, which is characterized in that the weeds are gramineae weed, broad leaved weeds.
6. application according to claim 4, which is characterized in that the weeds are resistant weed.
7. application according to claim 4, which is characterized in that the herbicidal composition is used as cauline leaf process agent
It can be used before wheat 2-3 leaf phase or wheat turn green to jointing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1761395A (en) * | 2003-03-13 | 2006-04-19 | 巴斯福股份公司 | Synergistically acting herbicidal mixtures |
| CN102326567A (en) * | 2011-10-21 | 2012-01-25 | 联保作物科技有限公司 | Wheat field weeding composition and preparation thereof |
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| CN1761395A (en) * | 2003-03-13 | 2006-04-19 | 巴斯福股份公司 | Synergistically acting herbicidal mixtures |
| CN102326567A (en) * | 2011-10-21 | 2012-01-25 | 联保作物科技有限公司 | Wheat field weeding composition and preparation thereof |
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