CN108782563A - A kind of Herbicidal combinations and its application containing trichlopyr and pyribenzoxim - Google Patents
A kind of Herbicidal combinations and its application containing trichlopyr and pyribenzoxim Download PDFInfo
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
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Abstract
The invention discloses a kind of Herbicidal combinations, by trichlopyr and pyribenzoxim according to weight ratio (2.5~40)：1 proportioning composition.The invention also discloses application of the above-mentioned Herbicidal combinations in prevention and control paddy field weed.Two kinds of medicaments can efficiently kill Different groups weeds respectively, and have apparent synergistic effect after being used in compounding, and improve effect of herbicides and play speed, reduce herbicide dosage, to improve the safety to rice.Two kinds of medicine component herbicide controlling spectrums are complementary, and mixed rear herbicide controlling spectrum can effectively cover the common malignant weed in the rice fields such as grass family, broad-leaved class, sedge weed, including barnyard grass, moleplant seed, triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin, difformed galingale herb；And there are high activity, market potential huge the extremely refractory perennial malignant weed of rice terrace and resistant weed.
Description
Technical field
The invention belongs to agricultural technology fields, and in particular to a kind of Herbicidal combinations and its application.
Background technology
China is the maximum country of rice yield in the world, about 3017.8 ten thousand hectare (4.5 hundred million of annual Monitoring of Paddy Rice Plant Area
Mu), produce about 2.1 hundred million tons of rice per year, cultivated area and yield account for the 18.1% of China's crop sowing gross area and total output respectively
With 33.6%.Thereby it is ensured that rice stable yields and rice quality are one of the basic task of China's planting industry safely.Weed infestation is
One of primary biological disaster faced in rice cropping, even if taking various prevention and control measures, paddy field weed harm directly results in
Rice yield loss be up to 13.8%-21.4%.It is still at present that China's rice terrace crop smothering is anti-by using herbicide weeding
The most important means of control, herbicide for paddy field 2014 annual sales amount in China's is more than 2,500,000,000 yuans.
There is an urgent need to lasting progress herbicide for paddy field varieties distributions in China.On the one hand, China's paddy field weed is to a variety of
The resistance of herbicide constantly aggravates and breaks out harm in flakes, and new herbicide kind is needed to come into operation.China's rice terrace at present
Echinochloa weeds (Echinochloa spp.), moleplant seed (Leptochloa chinensis), lady's-grass (Digitaria
Sanguinalis), Monochoria korsakowii (Monochoria korsakowii), angustifolia arrowhead herb (Sagittaria trifolia), special-shaped Sha
A variety of weeds such as careless (Cyperus difformis), ear leaf water amaranth (Ammannia arenaria) produce a variety of herbicides
Resistance, the more serious herbicide of resistance are mainly that quinoline carboxylic acid herbicide dichloro quinolinic acid, sulfonylurea herbicide benzyl are phonetic
Sulphur is grand and the cyhalofop-butyl etc. of pyrazosulfuron, pyrimidine sulfonyl amine herbicide penoxsuam, aryloxyphenoxypropionate class.
The herbicide that resistant weed is related to is based on cauline leaf process agent, thus, which the rice terrace for cauline leaf process after weeds seedling can
It is had too many difficulties to cope with herbicide kind.There is an urgent need to more practical herbicide types to put into Rice Productions for we, efficient, safety
While ground solves the problems, such as rice field crop smothering, weeds is delayed to break out resistance to existing medicament.On the other hand, chemical pesticide decrement uses
Have become the will of the state in China, constantly research and development are efficiently, the herbicide kind of safety, low-risk replacement dosage is big, residual is high,
The high herbicide kind of security risk 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, its root, stem, leaf deformity, reserve substance is caused to exhaust,
For vascular bundle by embolism or rupture, plant is gradually dead.Weeding is gone out filling before afforesting suitable for forest, is safeguarded fire line, is helped and educate pine tree
And stand conversion, prevent and kill off broad leaved weed and xylophyta for bare place.Sensibility of the grass to trichlopyr
It is relatively low, there is drug resistance.Trichlopyr can be decomposed in the soil by edaphon, and half-life period is 30-46 days.Trichlorine pyrrole
Fluoroacetic acid not yet registers in China's rice terrace use at present, but studies have reported that shows that trichlopyr can be in rice
Field is used as cauline leaf process herbicide after weeds seedling.
Search for new trichlopyr compounded formula has for administering rice terrace stubbornness weeds and antiweed weeds
Current demand outstanding and application potential.It is worth noting that, trichlopyr is that herbicide resistance generation is most light in the world
One of herbicide.Have research reported for work trichlopyr rice terrace and penoxsuam, Imazethapyr, chlorine fluorine pyridine ester,
The mixed effect of cyhalofop-butyl, fenoxaprops, propanil, molinate.It was found that trichlopyr and aryloxyphenoxy third
Esters of gallic acid herbicide cyhalofop-butyl, fenoxapropPethyl etc. are mixed to lead to antagonistic effect, show to reduce these medicaments to standing grain
The preventive effect of undergraduate course weeds；And trichlopyr is mixed with glufosinate-ammonium also to occur antagonistic effect；Rice terrace Echinochloa weeds pair
Penoxsuam has produced serious resistance, and trichlopyr is limited in scope with penoxsuam composite usage；Production
Middle discovery chlorine fluorine pyridine ester, propanil, molinate is not good enough to Security of rice, what trichlopyr was used with these composite reagents
Application potential is at present also than relatively limited；In addition, Imazethapyr can only use in resistance to imidazolinone herbicide rice field, and China does not have still
There are the rice varieties of resistance to imidazolinone herbicide that legal permission large area uses.Therefore, it there is now the trichlorine pyrrole oxygen second reported for work
Sour compounded formula is also not enough to solve the problems, such as rice field crop smothering prevention and control, needs to create new compound scheme.
Pyribenzoxim is pyrimidinylthiobenzoate herbicides, and being mainly used for cauline leaf process after rice terrace seedling, to prevent and kill off grass family miscellaneous
Grass, broad leaved weed and sedge weed protrude barnyard grass preventive effect.Pyribenzoxim cauline leaf process after rice terrace is for seedling makes
With, have been reported that show pyribenzoxim and dimethyl tetrachloride, pyrazosulfuron, halosulfuronmethyl, bentazone, propanil it is mixed can cause it is short of money
Anti- effect.In addition, up to the present, paddy field weed is very light to the resistance of pyribenzoxim, only in a small number of fields in individual areas
It was found that having the weed population of low-level resistance to pyribenzoxim.
Invention content
Technical problem to be solved by the invention is to provide a kind of weedings that can efficiently and safely prevent and kill off paddy field weed
Composition.
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 present invention is as follows：
A kind of Herbicidal combinations, by trichlopyr and pyribenzoxim according to weight ratio (2.5~40): 1 proportioning
Composition.
Preferably, the weight ratio of trichlopyr and pyribenzoxim is (5~20): 1.
Most preferably, the weight ratio of trichlopyr and pyribenzoxim is (5~10): 1.
Application of the above-mentioned Herbicidal combinations in preventing and kill off rice field weeds is also within protection scope of the present invention.
Wherein, the weeds be grassy weed, broad leaved weeds or sedge weed, including but not limited to barnyard grass,
The common malignant weed in the rice fields such as moleplant seed, triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin, difformed galingale herb.
Particularly, Herbicidal combinations of the invention are notable to perennial malignant weed herbicidal effect, including but not limited to water
The leaf of bamboo, alternanthera philoxeroides, angustifolia arrowhead herb and firefly Lin.
In addition, the Herbicidal combinations antagonism weed control of the present invention is notable.
In use, by the Herbicidal combinations before paddy field weed 3-6 leaf phases, 3 leaf phase to jointing stage of rice cauline leaf
Spraying treatment uses, significant effect.
Advantageous effect：Compared with existing rice terrace Common Herbicides, this re-compounded binary herbicide has the advantage that：
(1) there are synergistic effect, two kinds of medicaments that can efficiently kill Different groups weeds respectively, and have after being used in compounding bright
Herbicide dosage is greatly reduced in aobvious synergistic effect, improves the safety to rice.
(2) two kinds of medicine component herbicide controlling spectrums are complementary, and mixed rear herbicide controlling spectrum can effectively cover grass family, broad-leaved class, Cyperaceae
The common evil in the rice fields such as weeds, including barnyard grass, rice barnyard grass, moleplant seed, triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin, difformed galingale herb
Property weeds.
(3) obstinate perennial malignant weed can be killed, the perennial malignant weed extremely refractory to rice terrace has high work
Property, such as triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin etc..
(4) drug effect is fast, and weeds, that is, mortality in 7 days after medication, 14 days weeds are substantially withered after medication, in rice terrace application
Rice seedlings can be made quickly to set up the competitive advantage to weeds, laid the foundation for rice high yield.
(5) it can be used for resistant weed improvement, paddy field weed not yet generates resistance to trichlopyr at present, to pyrimidine
Oxime grass ether resistance level is very low and is only chanced in only a few field, and two kinds of composite reagents can effectively administer rice terrace and cause disaster
Various antiweed weeds.
(6) various planting type rice fields are suitable for rice safety, trichlopyr pyribenzoxim is used in compounding
To having safety outstanding before the 3 leaf phase to jointing stage of rice, therefore it can be used for rice planting technology, live streaming, rice transplanting, handwork transplant
Etc. all kinds of rice fields.
(7) two kinds of herbicidal composition active compound manufacturing enterprises are more, and active compound is in liberal supply, and reagent cost is relatively low.
Specific implementation mode
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 pyribenzoxim compounding agent formulation ratio screening test.
In order to screen the optimum formula proportioning of trichlopyr and pyribenzoxim, in Yangzhou University's paddy industry engineering
A series of whole strain bioassay are carried out in Institute for Research and Technology's artificial climate room.
1.1 for trying weeds：Barnyard grass (Echinochloa crusgalli), moleplant seed (Leptochloa chinensis),
Triquetrousc murdannia herb (Murdannia triquetra), alternanthera philoxeroides (Alternanthera philoxeroides), angustifolia arrowhead herb
(Sagittaria trifolia), difformed galingale herb (Cyperus difformis), firefly Lin (Scirpus juncoides).Water
Usually weeds are divided into three categories when rice field is using herbicide weeding：Grassy weed, broad leaved weed, sedge weed, in addition
Also some perennial weeds harm is serious.This experiment is that current rice terrace harm is serious pernicious miscellaneous for this 7 kinds of grass of examination
Grass, and different target weeds monoids is represented, wherein barnyard grass, moleplant seed represent rice terrace grass family malignant weed；Fishscale bamboo
Leaf, alternanthera philoxeroides, angustifolia arrowhead herb represent rice terrace broad-leaved class malignant weed；Difformed galingale herb and firefly Lin represent rice terrace Cyperaceae evil
Property weeds.Meanwhile triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin are rice terrace typically perennial malignant weed；And barnyard grass,
Moleplant seed, difformed galingale herb are rice terrace typically annual 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),25(A25),50(A50),100(A100)g a.i./hm2；
Pyribenzoxim (B)：0(B0),2.5(B2.5),5(B5),10(B10)g a.i./hm2。
2) binary built agent prescription proportioning screening dosage setting is as shown in table 1：
Table is arranged in 1 binary built agent prescription of table proportioning screening dosage
| A0B0 | A25B0 | A50B0 | A100B0 |
| A0B2.5 | A25B2.5 | A50B2.5 | A100B2.5 |
| A0B5 | A25B5 | A50B5 | A100B5 |
| A0B10 | A25B10 | A50B10 | A100B10 |
1.3 test method
The organoclay that herbicide was not used is packed into the square plastic plant that specification is 7 × 7 × 7cm cultivates flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.Select the barnyard grass of full seed, moleplant seed, triquetrousc murdannia herb, angustifolia arrowhead herb,
Difformed galingale herb, firefly Lin seed, each small flower sow 20.It is one layer thin in seed overlying to sow barnyard grass, the small flower of angustifolia arrowhead herb
Native (thickness about 3mm), sowing moleplant seed, triquetrousc murdannia herb, firefly Lin and difformed galingale herb small flower not earthing.Alternanthera philoxeroides seedling is logical
Vegetative propagation acquisition is crossed, each small flower is packed into 5 sections of alternanthera philoxeroides root-like stocks with bud, the long 4cm of every section of root-like stock, covering one
Layer fine earth (thickness about 5mm).The thickening plastics transferring box that small flower is put into 44 × 33 × 10cm (is previously added the clear of 2cm depths
Water), it is placed in phjytotron and cultivates, 28 DEG C of illumination 14 hours, 25 DEG C of dark 10 hours keep 1- in transferring box during experiment
2cm water layers keep moistening in order to the soil in small whitepack by absorbing water.Start after 15 days to each small flower final singling, barnyard grass,
The each small flower of moleplant seed, angustifolia arrowhead herb, firefly Lin, difformed galingale herb retains the best seedling of 12 plants of growing ways, each small flower of triquetrousc murdannia herb
It is middle to retain the best seedling of 6 plants of growing ways.After alternanthera philoxeroides flowerpot culture 15 days, it is best that each small flower retains 3 plants of growing ways
Seedling.Each processing repeats 4 small flowers.
Barnyard grass, moleplant seed, difformed galingale herb, firefly Lin seedling are carried out using cauline leaf spray-on process at herbicide when growing to the 4-5 leaf phases
Reason；Triquetrousc murdannia herb, angustifolia arrowhead herb, alternanthera philoxeroides grew to for 6 leaf phases using cauline leaf spray-on process progress herbicide treatment, and control group sprays
Measure clear water.Spraying is sprayed using Yangzhou University's gardening and the walking gesture voltage stabilization spray tower of plant protection institute, 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.Dispenser 21
After it, acquires and weighed in each small flower for trying weeds overground part fresh weight respectively.
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 methods 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 formula0For the theoretical fresh weight inhibition rate after herbicide trichlopyr and pyribenzoxim compounding, X is trichlorine
The actual measurement fresh weight inhibition rate of pyrrole fluoroacetic acid single dose, Y are the actual measurement fresh weight inhibition rate of pyribenzoxim 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 be added effect.
1.4 test result
1) trichlopyr and synergy of the pyribenzoxim to barnyard grass
Actual measurement fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 2 different ratio of table to barnyard grass
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 3 different ratio of table to barnyard grass0
(%)
"/"：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 is with pyribenzoxim to synergy the value [(E-E of barnyard grass0)×100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 2, trichlopyr single dose to barnyard grass almost without inhibition；Pyribenzoxim single dose 10g
a.i./hm2When fresh weight inhibition rate be more than 50%, thus calculate the theoretical inhibiting rate that uses of two kinds of mixture of herbicides and be shown in Table 3.Pass through
Compare the actual measurement inhibiting rate under two kinds of herbicide difference compounded combinations and theoretical inhibiting rate, and then investigates two kinds of herbicides to barnyard grass
Synergy be shown in Table 4, as a result, it has been found that there is apparent synergy, trichlorine pyrrole oxygen in trichlopyr and pyribenzoxim
Acetic acid 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Between various dose combination show actual measurement suppression
Rate processed exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
2) trichlopyr and synergy of the pyribenzoxim to moleplant seed
Actual measurement fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 5 different ratio of table to moleplant seed
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 6 different ratio of table to moleplant seed0
(%)
"/"：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 7 different ratio of table is with pyribenzoxim to synergy the value [(E-E of moleplant seed0)×
100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 5, trichlopyr single dose to moleplant seed almost without inhibition；Pyribenzoxim single dose 10g
a.i./hm2When fresh weight inhibition rate only have 26%, thus calculate the theoretical inhibiting rate that uses of two kinds of mixture of herbicides and be shown in Table 6.Pass through
Compare the actual measurement inhibiting rate under two kinds of herbicide difference compounded combinations and theoretical inhibiting rate, and then investigates two kinds of herbicides to a thousand pieces of gold
The synergy of son is shown in Table 7, as a result, it has been found that having apparent synergy, trichlorine pyrrole in trichlopyr and pyribenzoxim
Fluoroacetic acid 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Between various dose combination show to survey
Inhibiting rate exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
3) trichlopyr and synergy of the pyribenzoxim to triquetrousc murdannia herb
Actual measurement fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 8 different ratio of table to triquetrousc murdannia herb
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 9 different ratio of table to triquetrousc murdannia herb0
(%)
"/"：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 10 different ratio of table is with pyribenzoxim to synergy the value [(E-E of triquetrousc murdannia herb0)×
100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 8, trichlopyr single dose 100g a.i./hm2When inhibiting rate 18%；Pyribenzoxim single dose 10g
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 9.Pass through ratio
Compared with the actual measurement inhibiting rate and theory inhibiting rate under two kinds of herbicide difference compounded combinations, and then two kinds of herbicides are investigated to triquetrousc murdannia herb
Synergy be shown in Table 10, as a result, it has been found that there is apparent synergy, trichlorine pyrrole in trichlopyr and pyribenzoxim
Fluoroacetic acid 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Between various dose combination show to survey
Inhibiting rate exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
4) trichlopyr and synergy of the pyribenzoxim to alternanthera philoxeroides
The trichlopyr pyribenzoxim compounding agent of 11 different ratio of table presses down the actual measurement fresh weight of alternanthera philoxeroides
Rate E (%) processed
The trichlopyr pyribenzoxim compounding agent of 12 different ratio of table presses down the theoretical fresh weight of alternanthera philoxeroides
Rate E processed0(%)
"/"：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 13 different ratio of table is with pyribenzoxim to synergy the value [(E-E of alternanthera philoxeroides0)
×100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 11, trichlopyr single dose 100g a.i./hm2The lower alternanthera philoxeroides fresh weight inhibition rate of processing connects
Nearly 50%；Pyribenzoxim single dose 10g a.i./hm2Thus the lower fresh weight inhibition rate of processing calculates two kinds of herbicides less than 15%
The theoretical inhibiting rate being used in compounding is shown in Table 12.By comparing the actual measurement inhibiting rate and theory under two kinds of herbicide difference compounded combinations
Inhibiting rate, and then investigate two kinds of herbicides and 13 are shown in Table to the synergy of alternanthera philoxeroides, as a result, it has been found that in trichlopyr
There is apparent synergy, trichlopyr 25-100g a.i./hm with pyribenzoxim2With pyribenzoxim 2.5-
10g a.i./hm2Between various dose combination show actual measurement inhibiting rate and exceed theoretical 10% or more inhibiting rate, that is, show
Synergistic effect.
5) trichlopyr and synergy of the pyribenzoxim to angustifolia arrowhead herb
Actual measurement fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 14 different ratio of table to angustifolia arrowhead herb
(%)
Theoretical fresh weight inhibition rate of the trichlopyr pyribenzoxim compounding agent of 15 different ratio of table to angustifolia arrowhead herb
E0(%)
"/"：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 16 different ratio of table is with pyribenzoxim to synergy the value [(E-E of angustifolia arrowhead herb0)×
100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 14, trichlopyr single dose 100g a.i./hm2To the fresh weight inhibition rate of angustifolia arrowhead herb under processing
44%；Pyribenzoxim single dose 10g a.i./hm2The lower fresh weight inhibition rate of processing is only 8%, thus calculates two kinds of mixture of herbicides
The theoretical inhibiting rate used is shown in Table 15.Inhibit with theoretical by comparing the actual measurement inhibiting rate under two kinds of herbicide difference compounded combinations
Rate, and then investigate two kinds of herbicides and 16 are shown in Table to the synergy of angustifolia arrowhead herb, as a result, it has been found that in trichlopyr and pyrimidine oxime
Careless ether has apparent synergy, trichlopyr 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./
hm2Between various dose combination show actual measurement inhibiting rate and exceed theoretical 10% or more inhibiting rate, that is, show synergistic effect.
6) trichlopyr and synergy of the pyribenzoxim to difformed galingale herb
The trichlopyr pyribenzoxim compounding agent of 17 different ratio of table inhibits the actual measurement fresh weight of difformed galingale herb
Rate E (%)
The trichlopyr pyribenzoxim compounding agent of 18 different ratio of table inhibits the theoretical fresh weight of difformed galingale herb
Rate E0(%)
"/"：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 19 different ratio of table is with pyribenzoxim to synergy the value [(E-E of difformed galingale herb0)×
100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 17, trichlopyr single dose 100g a.i./hm2When inhibiting rate be 42%；Pyribenzoxim single dose
10g a.i./hm2When fresh weight inhibition rate be 18%, thus calculate the theoretical inhibiting rate that uses of two kinds of mixture of herbicides and be shown in Table 18.
By comparing the actual measurement inhibiting rate and theory inhibiting rate under two kinds of herbicide difference compounded combinations, and then investigate two kinds of herbicides pair
The synergy of barnyard grass is shown in Table 19, as a result, it has been found that there is apparent synergy in trichlopyr and pyribenzoxim, three
Chlorine pyrrole fluoroacetic acid 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Between various dose combination show
It surveys inhibiting rate and exceeds theoretical 10% or more inhibiting rate, that is, show synergistic effect.
7) trichlopyr and synergy of the pyribenzoxim to firefly Lin
Actual measurement fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 20 different ratio of table to firefly Lin
(%)
Theoretical fresh weight inhibition rate E of the trichlopyr pyribenzoxim compounding agent of 21 different ratio of table to firefly Lin0
(%)
"/"：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 22 different ratio of table is with pyribenzoxim to synergy the value [(E-E of firefly Lin0)×100]
Note：Synergistic effect "/" is indicated when E-E0 > 10%：The lower theoretical fresh weight inhibition rate (E of single dose processing0) be equal in fact
Fresh weight inhibition rate (E) is surveyed, synergy is not present
As shown in Table 20, trichlopyr single dose 100g a.i./hm2It is 38% to the inhibiting rate of firefly Lin under processing；It is phonetic
Pyridine oxime grass ether single dose 10g a.i./hm2When fresh weight inhibition rate be 26%, thus calculate the theoretical suppression that two kinds of mixture of herbicides use
Rate processed is shown in Table 21.By comparing the actual measurement inhibiting rate and theory inhibiting rate under two kinds of herbicide difference compounded combinations, and then investigate
Two kinds of herbicides are shown in Table 22 to the synergy of barnyard grass, as a result, it has been found that having in trichlopyr and pyribenzoxim apparent
Synergy, trichlopyr 25-100g a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Between various dose
Combination shows actual measurement inhibiting rate and exceeds theoretical 10% or more inhibiting rate, that is, shows synergistic effect.
1.5 conclusion (of pressure testing)
7 kinds of weeds that this research is selected are the common malignant weed of rice terrace, and wherein barnyard grass, moleplant seed represents rice terrace
Grass family malignant weed；Triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb represent rice terrace broad-leaved class malignant weed；Difformed galingale herb and firefly
Lin represents rice terrace Cyperaceae malignant weed.Meanwhile triquetrousc murdannia herb, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin are that rice terrace is typically more
Year life malignant weed；And barnyard grass, moleplant seed, difformed galingale herb are rice terrace typically annual malignant weed.Therefore, for trying weeds
With good representativeness.In summary result of study shows that trichlopyr is used in compounding with pyribenzoxim for each
Class weeds all have inhibition and synergy effect outstanding.
Further analyze the proportioning of trichlopyr and pyribenzoxim compounded formula, trichlopyr 25-100g
a.i./hm2With pyribenzoxim 2.5-10g a.i./hm2Various combination compoundings show apparent synergistic effect (E-E0Value
> 30%), therefore the ratio range of trichlopyr and pyribenzoxim is：Trichlopyr: pyribenzoxim=
(2.5~40): 1.
Trichlopyr 50-100g a.i./hm2With pyribenzoxim 5-10g a.i./hm2The connection of various combination compoundings
Threshold (E-E0) is closed 40% or more, therefore, the proportion optimizing range of trichlopyr and pyribenzoxim is：Trichlorine
Pyrrole fluoroacetic acid: pyribenzoxim=(5~20): 1.
Trichlopyr 50-100g a.i./hm2With pyribenzoxim 10g a.i./hm2The joint of various combination compoundings
Threshold (E-E0) is matched obviously higher than other, therefore, the optimization range of trichlopyr and pyribenzoxim
It is：Trichlopyr: pyribenzoxim=(5~10): 1.
Embodiment 2：Trichlopyr pyribenzoxim compounding agent measures Security of rice
In order to measure safety of the compounding agent to rice of trichlopyr pyribenzoxim, in Yangzhou University's rice
A series of whole strain bioassay are carried out in industry engineering Institute for Research and Technology artificial climate room.Based on front as a result, with trichlorine pyrrole oxygen
Acetic acid: pyribenzoxim=10: 1 proportioning is tested for Security of rice.
2.1 for studying object：Japonica rice (southern round-grained rice 9108), long-grained nonglutinous rice (excellent 2640) in river in Zhejiang Province.
2.2 trichlopyr pyribenzoxims compound dosage setting：Trichlopyr+pyribenzoxim：0+0,
50+5、100+10、200+20、400+40g a.i./hm2
2.3 test method：
Security of rice experiment is detected respectively (main before the jointing stage for examination rice 3-4 leaf phases, 5-6 leaf phases, late tillering state
Stem starts jointing, jointing length < 1cm) plant.In the plastic casing that specification is 22 × 15 × 10cm, weeding was not used in loading
The organoclay (pH value 6.5, the content of organic matter 2.4%) of agent, soil layer height about 6cm in each box, adds water to saturation.Respectively by 3-
4 leaf phases, 5-6 leaf phases, the japonica rice for starting jointing, long-grained nonglutinous rice rice shoot are transplanted in plastic casing respectively.3-4 leaves are transplanted in each plastic casing
Phase, 5-6 leaf phases japonica rice, each 8 plants of long-grained nonglutinous rice, transplanting depth uniformity, shallow water work after rice transplanting keep water layer 1-2cm；Each modeling
1 plant of beginning jointing stage rice, transplanting depth uniformity are transplanted in magazine, shallow water work after rice transplanting keeps water layer 1-2cm.Often
A processing repeats 4 plastic casings.After rice transplanting 3 days, herbicide treatment is carried out using cauline leaf spray-on process, control group sprays equivalent
Clear water.Spraying is sprayed using Yangzhou University's gardening and the walking gesture voltage stabilization spray tower of plant protection institute, 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.Dispenser 21
After it, acquires and weighed in each plastic casing for trying rice overground part fresh weight respectively, calculate different disposal to rice overground part
Fresh weight inhibition rate.
Fresh weight inhibition rate=(control group fresh weight-processing group fresh weight) ÷ control group fresh weight × 100%
2.4 test result
The lower trichlopyr pyribenzoxim compounding agent of various dose processing is to japonica rice and long-grained nonglutinous rice aerial part fresh weight
Influence be shown in Table 23, the results showed that, trichlopyr pyribenzoxim according to 10: 1 proportioning various compounding dosage to water
Rice has preferable safety, or even in 440g a.i./hm2To the fresh weight inhibition rate of rice seedling still < 10% under processing.
23 trichlopyr pyribenzoxim compounding agent of table is to japonica rice (southern round-grained rice 9108) overground part fresh weight inhibition rate
(%)
*：Dosage is the dosage of trichlopyr+pyribenzoxim.
2.5 conclusion (of pressure testing)
Trichlopyr pyribenzoxim is according to 10: 1 proportioning compounding agents in 55-440g a.i./hm2Handle lower pair
There is preferable safety before the 3 leaf phase to jointing stage of rice.
The inhibiting effect of 3 trichlopyr pyribenzoxim compounding agent antagonism weeds of embodiment measures
It is miscellaneous that compounding agent in order to measure trichlopyr pyribenzoxim endangers serious antiweed to rice terrace
The inhibiting effect of grass, carries out a series of whole strain biometrics in Yangzhou University's paddy industry engineering Institute for Research and Technology artificial climate room
It is fixed.Based on front as a result, trichlopyr: pyribenzoxim=10: 1 proportioning is for testing.
3.1 for trying weeds：Anti- cyhalofop-butyl moleplant seed, anti-penoxsuam barnyard grass, conventional moleplant seed, conventional barnyard grass.Cyanogen
Fluorine grass ester is aryloxyphenoxypropionate class herbicide, has special efficacy to rice field malignant weed moleplant seed；Penoxsuam is phonetic
Pyridine sulfonamides herbicide has special efficacy to rice field malignant weed barnyard grass；Cyhalofop-butyl and penoxsuam are that current rice terrace is worked as
Family's herbicide.On the other hand, China's rice terrace barnyard grass and moleplant seed are to occur the most serious two to herbicide resistance at present
Kind weeds.Therefore, the present embodiment is for the further research three of examination object with anti-cyhalofop-butyl moleplant seed, anti-penoxsuam barnyard grass
Chlorine pyrrole fluoroacetic acid pyribenzoxim is used for the potentiality that resistant weed is administered.In addition, this experiment is with conventional moleplant seed and barnyard grass
Population is with comparing.
3.2 doses are arranged：
Trichlopyr+pyribenzoxim：50+5,100+10,200+20g a.i./hm2
Cyhalofop-butyl：105g a.i./hm2(recommending maximum dose level)
Penoxsuam：36g a.i./hm2(recommending maximum dose level)
3.3 test method：
The organoclay that herbicide was not used is packed into the square plastic plant that specification is 7 × 7 × 7cm cultivates flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.Select barnyard grass, the moleplant seed seed of full seed, each small flower
Sowing 20.The small flower of barnyard grass is sowed at one layer of fine earth of seed overlying (thickness about 3mm), the small flower for sowing moleplant seed does not cover
Soil.Small flower is put into the thickening plastics transferring box (clear water for being previously added 2cm depths) of 44 × 33 × 10em, is placed in artificial climate
It is cultivated in room, 28 DEG C of illumination 14 hours, 25 DEG C of dark 10 hours keep 1-2cm water layers in order to small during experiment in transferring box
Soil in whitepack keeps moistening by absorbing water.Start after 15 days to each small flower final singling, each small flower retains 12 plants long
The best seedling of gesture.Each processing repeats 4 small flowers.Wait for that weeds grow to the 4-5 leaf phases using cauline leaf spray-on process progress herbicide
Processing, control group spray equivalent clear water.Spraying uses the walking gesture voltage stabilization spray tower of Yangzhou University's gardening and plant protection institute
It sprays, 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 dispenser 21 days, acquires and weighed in each plastic casing for trying weeds overground part fresh weight respectively, calculate different disposal
To the fresh weight inhibition rate of target weeds 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 pyribenzoxim compounding agent of various dose processing to for examination moleplant seed and barnyard grass on the ground
The influence of part fresh weight is shown in Table 24, the results showed that, trichlopyr pyribenzoxim compounds 110g a.i./hm2To barnyard grass
Inhibiting rate 85% or more, 80% is had also exceeded to the inhibiting rate of moleplant seed, and 220g a.i./hm2Resistance has been killed completely
And conventional moleplant seed and barnyard grass population, in addition, trichlopyr pyribenzoxim compounding 220g a.i./hm2To rice height
Degree (is shown in Table 23) safely.
The overground part fresh weight inhibition rate (%) of table 24 different herbicide antagonism and conventional moleplant seed and barnyard grass
3.5 conclusion (of pressure testing)
Trichlopyr pyribenzoxim compounding agent can be used for the improvement of resistance barnyard grass and moleplant seed.
Embodiment 4：The quick-acting of trichlopyr pyribenzoxim compounding agent prevention and control weeds measures
In order to detect the quick-acting of trichlopyr pyribenzoxim compounding agent management of weeds, in Yangzhou University's rice
A series of whole strain bioassay are carried out in industry engineering Institute for Research and Technology artificial climate room.Front is the result shows that trichlopyr
200g a.i./hm2+ pyribenzoxim 20g a.i./hm2Various weeds can effectively be killed and to rice safety, therefore this
Study the dosage setting using this dosage as trichlopyr pyribenzoxim compounding agent.
4.1 for trying weeds：Barnyard grass, moleplant seed, triquetrousc murdannia herb, alternanthera philoxeroides, difformed galingale herb, firefly Lin.Wherein barnyard grass, a thousand pieces of gold
Filial generation table rice terrace grass family malignant weed；Triquetrousc murdannia herb, alternanthera philoxeroides represent rice terrace broad-leaved class malignant weed；Difformed galingale herb
Rice terrace Cyperaceae malignant weed is represented with firefly Lin.Meanwhile triquetrousc murdannia herb, alternanthera philoxeroides, firefly Lin be rice terrace typically for many years
Raw malignant weed；And barnyard grass, moleplant seed, difformed galingale herb are rice terrace typically annual malignant weed.
4.2 doses are arranged：
T1：Trichlopyr 200g a.i./hm2
T2：Trichlopyr 200g a.i./hm2+ pyribenzoxim 20g a.i./hm2
T3：Pyribenzoxim 20g a.i./hm2
T4：Clear water compares
4.3 test method：
The organoclay that herbicide was not used is packed into the square plastic plant that specification is 7 × 7 × 7cm cultivates flowerpot
(pH value 6.5, the content of organic matter 2.4%), adds water to saturation.The barnyard grass of selection full seed, moleplant seed, triquetrousc murdannia herb, special-shaped Sha
Grass, firefly Lin seed, each small flower sow 20.The small flower of barnyard grass is sowed at one layer of fine earth of seed overlying (thickness about 3mm),
Sow the small flower not earthing of moleplant seed, triquetrousc murdannia herb, firefly Lin and difformed galingale herb.Alternanthera philoxeroides seedling is obtained by vegetative propagation
, each small flower is packed into 5 sections of alternanthera philoxeroides root-like stocks with bud, and the long 4cm of every section of root-like stock covers one layer of fine earth (thickness
About 5mm).Small flower is put into the thickening plastics transferring box (clear water for being previously added 2cm depths) of 44 × 33 × 10cm, is placed in artificial
Cultivated in climatic chamber, 28 DEG C of illumination 14 hours, 25 DEG C of dark 10 hours, kept in transferring box during experiment 1-2cm water layers so as to
In the soil in small whitepack moistening is kept by absorbing water.Start after 15 days to each small flower final singling, barnyard grass, moleplant seed, firefly Lin,
The each small flower of difformed galingale herb retains the best seedling of 12 plants of growing ways, and it is best to retain 6 plants of growing ways in each small flower of triquetrousc murdannia herb
Seedling.After alternanthera philoxeroides flowerpot culture 15 days, each small flower retains the best seedling of 3 plants of growing ways.Each processing repeats 4
Small flower.
Barnyard grass, moleplant seed, difformed galingale herb, firefly Lin seedling are carried out using cauline leaf spray-on process at herbicide when growing to the 4-5 leaf phases
Reason；Triquetrousc murdannia herb, alternanthera philoxeroides grew to for 6 leaf phases using cauline leaf spray-on process progress herbicide treatment, and control group sprays equivalent clear water.
Spraying is sprayed using Yangzhou University's gardening and the walking gesture voltage stabilization spray tower of plant protection institute, 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.Dispenser 7 days, 15 days,
After 45 days, acquires and weighed in each small flower for trying weeds overground part fresh weight respectively, calculate aerial part fresh weight inhibition rate.
4.4 test result
Different disposal herbicide using latter 7 days, 15 days and 45 days to the fresh weight inhibition rate of various weeds be shown in Table 25, table 26,
Table 27.The result shows that trichlopyr can greatly promote the quick-acting of herbicide with pyribenzoxim compounding, especially apply
After medicine 7 days.25 result of table shows the inhibiting rate after medication 7 days, to grassy 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 26 Hes within 15 days after medication
Table 27, as a result also indicates that, trichlopyr can substantially accelerate the drug effect of pyribenzoxim to play with pyribenzoxim compounding,
And trichlopyr compounds the herbicide dosage that can be substantially reduced with pyribenzoxim.
The different herbicide applications of table 25 are after 7 days to the fresh weight inhibition rate (%) for trying weeds
T1：Trichlopyr 200g a.i./hm2；T2：Trichlopyr 200g a.i./hm2+ pyrimidine oxime monoether
20g a.i./hm2；T3：Pyribenzoxim 20g a.i./hm2.
The different herbicide applications of table 26 are after 15 days to the fresh weight inhibition rate (%) for trying weeds
T1：Trichlopyr 200g a.i./hm2；T2：Trichlopyr 200g a.i./hm2+ pyribenzoxims
20g a.i./hm2；T3：Pyribenzoxim 20g a.i./hm2.
The different herbicide applications of table 27 are after 45 days to the fresh weight inhibition rate (%) for trying weeds
T1：Trichlopyr 200g a.i./hm2；T2：Trichlopyr 200g a.i./hm2+ pyribenzoxims
20g a.i./hm2；T3：Pyribenzoxim 20g a.i./hm2.
4.5 conclusion (of pressure testing)
Trichlopyr can greatly promote drug effect with pyribenzoxim compounding, and target weeds are a large amount of after dispenser 7 days
It is withered.Rice seedling breaks away from weed competition as early as possible, forms enough tillers early and jointing envelope row (is thoroughly established to the competing of weeds
Strive advantage) it is most important, it is the basis of rice high yield.Therefore, this test result shows trichlopyr pyribenzoxim
Compounding has great application value.
Claims (8)
1. a kind of Herbicidal combinations, which is characterized in that it by trichlopyr and pyribenzoxim according to weight ratio (2.5~
40): 1 proportioning composition.
2. Herbicidal combinations according to claim 1, which is characterized in that the weight of trichlopyr and pyribenzoxim
Than for (5~20): 1.
3. Herbicidal combinations according to claim 1, which is characterized in that the weight of trichlopyr and pyribenzoxim
Than for (5~10): 1.
4. application of the Herbicidal combinations described in claim 1 in prevention and control paddy field weed.
5. application according to claim 4, which is characterized in that the weeds be grassy weed, broad leaved weeds or
Sedge weed.
6. application according to claim 5, which is characterized in that the weeds are perennial malignant weed, including fishscale bamboo
Leaf, alternanthera philoxeroides, angustifolia arrowhead herb, firefly Lin.
7. application according to claim 5, which is characterized in that the weeds are resistant weed.
8. application according to claim 4, which is characterized in that the Herbicidal combinations the paddy field weed 3-6 leaf phases,
Cauline leaf spraying treatment uses before the 3 leaf phase to jointing stage of rice.
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