CN109819981A - A kind of auxiliary agent Silwet 806 preventing and kill off resistant weed and chlortoluron synergistic combination and its application - Google Patents
A kind of auxiliary agent Silwet 806 preventing and kill off resistant weed and chlortoluron synergistic combination and its application Download PDFInfo
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- CN109819981A CN109819981A CN201910079320.3A CN201910079320A CN109819981A CN 109819981 A CN109819981 A CN 109819981A CN 201910079320 A CN201910079320 A CN 201910079320A CN 109819981 A CN109819981 A CN 109819981A
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- chlortoluron
- silwet
- alopecurus
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Abstract
The invention discloses a kind of auxiliary agent Silwet 806 for preventing and kill off resistant weed and chlortoluron synergistic combination and its application, auxiliary agent of weedicide combination can have significant synergies to the anti-fenoxapropPethyl Alopecurus of winter wheat field, while have to wheat safety；Dosage is significantly reduced, chemical control cost is reduced；It is simultaneous to control the other resistance gramineae weeds of winter wheat field and part broadleaf weeds, the advantages that reducing times for spraying.It is that one kind prevents and kill off the feasible effects enhancing and dose reducing auxiliary agent of weedicide combination of the anti-fenoxapropPethyl Alopecurus of winter wheat field at present.
Description
Technical field
The invention belongs to technical field of plant protection, it is related to a kind of auxiliary agent Silwet 806 and chlortoluron synergistic combination, uses
In preventing and kill off the anti-fenoxapropPethyl Alopecurus of winter wheat field.
Background technique
Wheat is the crop planted extensively all over the world, is one of most important cereal crops in the world, yield is only secondary
In corn, there are about 40% populations using wheat as main food in the world.According to statistics, total sown area of China's wheat in 2017
Be 2398.75 ten thousand hectares, wheat total output is 12977.4 ten thousand tons, account for respectively the national grain sowing gross area 21.38% and it is complete
The 21% of state's total output of grain.
In the rice stubble wheatland of middle and lower reach of Yangtze River Plain, Alopecurus is to endanger the most seriously, is distributed most commonly used standing grain
One of undergraduate course weeds, studies have shown that Alopecurus density is up to 10 plants -400 plants/0.11m in wheat paddock2, wheat yield damage
Mistake rate is 5.65%-62.32%.Chemical control is the main mode that current weeds of wheat is prevented and kill off, and fenoxapropPethyl is
Wheat paddock prevents and kill off the most important herbicide of gramineae weed at present, but due to lasting, single use, leads to Alopecurus pair
FenoxapropPethyl produces serious drug resistance, has on Jiangsu, Anhui, Henan, Shandong and other places largely see about Japan at present
Wheat ma to the report of fenoxapropPethyl drug resistance, and the anti-fenoxapropPethyl Alopecurus in part to clodinafop-propargyl,
The ACCase inhibitor such as pinoxaden produces cross resistance, more has a small amount of population to mesosulfuron, pyroxsulam, fluorine thiophene grass
The herbicides such as amine produce multiresistance, therefore have been very difficult to prevent and kill off in the anti-fenoxapropPethyl Alopecurus in field.
Chlortoluron belongs to phenyl ureagroup herbicides, is currently used primarily in wheat paddock and prevents and kill off annual grassy weeds.Experiments have shown that
It is preferable that chlortoluron fights fenoxapropPethyl Alopecurus preventive effect, but the disadvantage is that dosage is very big, registration dosage is 1125-
2250g a.i./hm2, a large amount of uses will generate wheat phytotoxicity, succession crop phytotoxicity, pesticide residue, environmental pollution etc. for a long time
A series of problems.Therefore it when preventing and kill off anti-fenoxapropPethyl Alopecurus with phenyl ureagroup herbicides such as chlortolurons, should infuse
Meaning reduces dosage.
By adding suitable builder to herbicide, the preventive effect of herbicide antagonism weeds can be improved, preventing and kill off
Achieve the purpose that herbicide is reduced while resistant weed.Silwet 806 belongs to organosilicone surfactants, has good
Wettability, stronger adhesion strength, splendid ductility, stomata permeability and good anti-rain erosion, and have efficiently,
Environmentally friendly, environmentally safe feature is on current herbicide market using wider Additives Products.
The present invention is had made intensive studies by the mixture of chlortoluron and auxiliary agent Silwet 806, and discovery Silwet 806 is right
Chlortoluron prevents and kill off the anti-fenoxapropPethyl of wheat paddock and has significant synergies, miscellaneous in the synergy use of herbicide decrement, resistance
Grass, which administers aspect, has biggish potential using value.
Summary of the invention
It is an object of the invention to mixed with auxiliary agent Japanese to prevent and kill off the anti-fenoxapropPethyl of winter wheat field by herbicide
Amur foxtail.
Above-mentioned purpose that the invention is realized by the following technical scheme:
Herbicide and auxiliary combination, main component is herbicide chlortoluron and auxiliary agent Silwet 806, for preventing and kill off the winter
The anti-fenoxapropPethyl Alopecurus of wheat paddock.
Method is applied in combination in chlortoluron and auxiliary agent Silwet 806: after wheat seedling, the weeds 3-5 leaf phase, and cauline leaf spraying treatment.
Chlortoluron is mixed with auxiliary agent Silwet 806 to be had the advantage that
(1) confrontation fenoxapropPethyl Alopecurus synergistic effect is significant, can significantly reduce dosage, and it is anti-to reduce chemistry
Except cost.
(2) the other resistance gramineae weeds of winter wheat field and part broadleaf weeds simultaneous can be controlled, times for spraying is reduced.
(3) it does not make significant difference after adding auxiliary agent Silwet 806 to Safe to wheat.
Specific embodiment
(1) auxiliary agent Silwet 806 prevents and kill off anti-fenoxapropPethyl Alopecurus synergy test one to chlortoluron
Laboratory test:
Laboratory test is in May, 2018 in August, 2018, in Agricultural University Of Nanjing's herbicide virulence and drug resistance laboratory
It is carried out in heliogreenhouse.
Reagent agent: 50% chlortoluron WP (Jiangsu Kuaidaagricultural Chemical Co., Ltd)
For trying auxiliary agent: organosilicon auxiliary agent " Silwet 806 " (Mai Tu new and high technology Materials Co., Ltd, the U.S.)
For trying weeds: (number JZJR-1, anti-fenoxapropPethyl, hereinafter referred to as resistance Japan see wheat to Alopecurus
Ma, ED50Value is 1320.69g a.i./hm2, relevant antagonism multiple is 87.07, and seed picks up from Jiangsu Province in May, 2010
Jurong City, Zhengjiang City).
Laboratory test process
1. auxiliary agent Silwet 806 prevents and kill off anti-fenoxapropPethyl Alopecurus synergy test medicament to chlortoluron
And adjuvant dose setting
1.1 auxiliary agent Silwet 806 are arranged the dosage of the measurement test of the best synergy dosage of chlortoluron as follows:
The dosage of fixed herbicide chlortoluron, changes the dosage of auxiliary agent Silwet 806
Chlortoluron dosage: 450g a.i./hm2。
806 dosage of auxiliary agent Silwet: 0,0.02%, 0.025%, 0.033%, 0.05%, 0.1%.
Mixture is handled two-by-two by chlortoluron and auxiliary agent Silwet 806.
1.2 auxiliary agent Silwet 806 are arranged the dosage of the measurement test of chlortoluron decrement dosage as follows:
Make the dosage constant of auxiliary agent Silwet 806, changes the dosage of herbicide chlortoluron
806 dosage of auxiliary agent Silwet: according to " auxiliary agent Silwet 806 tests the measurement of chlortoluron decrement dosage ", institute is really
Best synergy dosage of the fixed Silwet 806 to chlortoluron.
Chlortoluron dosage: 0,225,450,675,900,1125g a.i./hm2。
Mixture is handled two-by-two by chlortoluron and auxiliary agent Silwet 806.
2. auxiliary agent Silwet 806 prevents and kill off anti-fenoxapropPethyl Alopecurus synergy test process to chlortoluron
Auxiliary agent Silwet 806 is to the measurement test of the best synergy dosage of chlortoluron and auxiliary agent Silwet 806 to chlortoluron
The measurement test of decrement dosage is all made of indoor whole strain bioassary method measurement.
The composite soil that clay fertilizer ratio is 2: 1 is got out, composite soil pH is 6.1, and the content of organic matter is 1.4% and from being not used
Herbicide is to be packed into the composite soil in the porose small plastic box of 7 × 7 × 7cm and bottom in specification, adds water to saturation.Selection is full
The full and resistance Alopecurus seed of breaking dormancy, is sowed by each small plastic box 25 standards, one layer is covered after finishing
Fine earth is subsequently placed in daylight temperature-controlling chamber and grows, and temperature setting is 20 DEG C of illumination, 15 DEG C dark, periodicity of illumination 12: 12h (D:
L).After Alopecurus emergence is neat, final singling is carried out to it, every basin final singling is to 20 plants.Continue to cultivate after final singling, be seen to Japan
Wheat ma grows to the 3-4 leaf phase, in progress on June 15th, 2018 cauline leaf spraying treatment.It is mechanical using Ministry of Agriculture's Nanjing agriculture by spraying
Change and studies the raw survey spray tower of 3WP-2000 type walking produced, main axis speed 96mm/r, spray height 300mm, spray
Head effectively spraying swath 350mm, capacity of sprinkler 390mL/min, travel distance 1340mm, medicine liquid volume 30mL.Continue to be put into after processing
It is grown in heliogreenhouse.
Resistance Alopecurus fresh weight after medication 21 days in each plastic casing of investigation records calculates fresh weight inhibition rate.
Fresh weight inhibition rate %=(control fresh weight-processing fresh weight)/control fresh weight × 100
Herbicide is calculated using the Logistic Fitting curve equation that the drm function of R software " drc " program bag provides and is helped
Agent antagonism Alopecurus Fresh Yuxincao inhibiting rate reaches 50% dose value (ED50) and 90% dose value (ED90)。
Laboratory test results are as shown in the table:
1 auxiliary agent Silwet of table, 806 various dose prevents and kill off the synergistic effect of resistance Alopecurus to chlortoluron
Note: lowercase is the significance of difference horizontal using DPS software Duncan duncan's new multiple range method 0.05.Similarly hereinafter.
2 auxiliary agent Silwet 806 of table prevents and kill off the decrement dosage of resistance Alopecurus to chlortoluron
Note: " P value " is " LL.3 () " Logistic curve model that the drm function based on R software " drc " program bag provides
It calculates ED50 value and obtains the parameter of reaction model validity, P < 0.05 indicates that data significantly meet Logistic model.
As shown in Table 1, the auxiliary agent Silwet 806 for adding 0.02%~0.1% dosage prevents and kill off resistance Japan to chlortoluron and sees
Wheat ma has significant synergistic effect.Auxiliary agent Silwet 806 significantly increases the fresh weight suppression of chlortoluron antagonism Alopecurus
Rate processed, each treatment dosage antagonism Alopecurus fresh weight inhibition rate significantly increases, wherein when fresh weight inhibition rate highest
806 dosage of Silwet is 0.05%.Therefore in room conditions, auxiliary agent Silwet 806 prevents and kill off resistance Japan to chlortoluron and sees
The best synergy dosage of wheat ma is 0.05%.
As shown in Table 2, auxiliary agent Silwet 806 antagonism Alopecurus unrestraint itself acts on, and in auxiliary agent Silwet
806 pairs of chlortolurons are best synergy dosage 0.05%, and in the case where changing chlortoluron dosage, auxiliary agent Silwet 806 is to chlortoluron
Preventing and kill off resistance Alopecurus has more apparent decrement effect.By comparing the chlortoluron different disposal antagonism anti-wheat ma of Japan
Fresh weight inhibition rate discovery: chlortoluron 675g a.i./hm2Inhibiting rate is 91.96% when+0.05% Silwet 806, and green
The grand recommended dose of wheat (1125g a.i./hm2) under inhibiting rate 91.82% there was no significant difference.Therefore in room conditions, add
Add the auxiliary agent Silwet 806 of best synergy dosage that chlortoluron can be made to reduce about the 40% of recommended dose.And by comparing ED50
And ED90Value discovery, under the best synergy dosage of auxiliary agent Silwet 806, the ED of chlortoluron antagonism Alopecurus50With
ED90Value significantly reduces compared with not adding assistant, respectively only 105.93g a.i./hm2With 566.37g a.i./hm2, all far
Lower than recommended dose.Therefore according to indoor biometrics as a result, 60% recommended dose of chlortoluron (675g a.i./hm2) addition 0.05%
Silwet 806, which carries out cauline leaf spraying treatment, can effectively prevent and kill off anti-fenoxapropPethyl Alopecurus, reach its recommended dose
Effect.
(2) the influence test-laboratory test of auxiliary agent Silwet 806 and Chlorotoluron to Safe to wheat
Laboratory experiment is in May, 2018 in August, 2018, in Agricultural University Of Nanjing's herbicide virulence and drug resistance laboratory
It is carried out in heliogreenhouse.
Reagent agent: 50% chlortoluron WP (Jiangsu Kuaidaagricultural Chemical Co., Ltd)
For trying auxiliary agent: organosilicon auxiliary agent " Silwet 806 " (Mai Tu new and high technology Materials Co., Ltd, the U.S.)
For studying object: wheat (town wheat No. 9)
Laboratory experiment process
1. the influence test medicine and adjuvant dose setting of auxiliary agent Silwet 806 and Chlorotoluron to Safe to wheat
The setting of the dosage of chlortoluron and auxiliary agent Silwet 806 is as follows:
Chlortoluron dosage: 0,1125,2250g a.i./hm2。
806 dosage of auxiliary agent Silwet: 0,0.1%.
Mixture is handled two-by-two by chlortoluron and auxiliary agent Silwet 806.
2. process is tested in the influence of auxiliary agent Silwet 806 and Chlorotoluron to Safe to wheat
The composite soil that clay fertilizer ratio is 2: 1 is got out, composite soil pH is 6.1, and the content of organic matter is 1.4% and from being not used
Herbicide is to be packed into the composite soil in the porose small plastic box of 7 × 7 × 7cm and bottom in specification, and bottom Jia Shui makes native water suction
To saturation.Full wheat seed is selected, is sowed by each small plastic box 15 standards, one layer of fine earth is covered after finishing, then
It is placed in heliogreenhouse and grows, temperature setting is 20 DEG C of illumination, 15 DEG C dark, periodicity of illumination 12: 12h (D: L).Go out to wheat
After seedling is neat, final singling is carried out to it, every basin final singling is to 10 plants.Continue to cultivate after final singling, carries out stem to wheat growth to 3-5 leaf phase
Leaf spraying treatment.It is surveyed by spraying using the 3WP-2000 type walking of Nanjing Agriculturing Mechanization Inst., Ministry of Agriculture's production is raw by spraying
Tower, main axis speed 96mm/r, spray height 300mm, spray head effective spraying swath 350mm, capacity of sprinkler 390mL/min, walking
Distance 1340mm, medicine liquid volume 30mL.Continue to be put into heliogreenhouse after processing to grow.21 days after medicine, by each processing wheatland
Under the sub-cut of top, fresh weight is weighed, calculates fresh weight inhibition rate, and the significance of difference is carried out to each processing wheat fresh weight with DPS software
Analysis.
Fresh weight inhibition rate %=(control fresh weight-processing fresh weight)/control fresh weight × 100
3 auxiliary agent Silwet 806 of the table influence to wheat seedling Fresh Yuxincao mixed with different agents
As shown in Table 3,0.1% auxiliary agent Silwet 806 to wheat Fresh Yuxincao inhibiting rate be -0.25%, compared with the control without
Significant difference, and chlortoluron is in 1125,2250g a.i./hm20.1% auxiliary agent Silwet 806 is added under two dosage
Afterwards, compared with not adding assistant, to the Fresh Yuxincao inhibiting rate of wheat seedling there are no significant difference.Therefore in room conditions, help
Agent Silwet 806 itself does not influence wheat seedling growth, does not influence with after Chlorotoluron on Safe to wheat.
Claims (6)
1. a kind of auxiliary agent Silwet 806 for preventing and kill off the anti-fenoxapropPethyl Alopecurus of winter wheat field and chlortoluron synergy group
Close and its application, it is characterised in that the synergistic combination using auxiliary agent Silwet 806 and chlortoluron as composition, mainly for
Anti- fenoxapropPethyl Alopecurus is the winter wheat field of sociales, cauline leaf process agent.
2. auxiliary agent Silwet 806 according to claim 1 and chlortoluron synergistic combination, it is characterised in that the auxiliary agent
In Silwet 806 and chlortoluron synergistic combination the synergy dosage range of auxiliary agent Silwet 806 be liquid volume 0.02%~
0.1%.
3. auxiliary agent Silwet 806 according to claim 1 and chlortoluron synergistic combination, it is characterised in that the auxiliary agent
The best synergy dosage that Silwet 806 prevents and kill off anti-fenoxapropPethyl Alopecurus to chlortoluron is the 0.05% of liquid volume.
4. auxiliary agent Silwet 806 according to claim 1 and chlortoluron synergistic combination, it is characterised in that in auxiliary agent
Under the best synergy dosage of Silwet 806, chlortoluron is 675g a.i./hm in dosage2When can fight fenoxapropPethyl
Alopecurus preventive effect is 90% or more, and suitable with recommended dose preventive effect, auxiliary agent Silwet 806 can make under best synergy dosage
Chlortoluron decrement about 40%.
5. auxiliary agent Silwet 806 described in claim 1 is applied with chlortoluron synergistic combination and is being prevented and kill off winter wheat field with anti-essence evil
Azoles diclofop-methyl Alopecurus is the resistance grass weeds and part broadleaf weeds of sociales.
6. auxiliary agent Silwet 806 according to claim 1 and chlortoluron synergistic combination, it is characterised in that the synergistic combination
Application method be the weeds 3-5 leaf phase after wheat seedling, cauline leaf process is carried out to weeds and wheat using spray-on process.
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| CN201910079320.3A CN109819981B (en) | 2019-01-28 | 2019-01-28 | Application of adjuvant Silwet 806 and chlortoluron synergistic combination for preventing and killing off fenoxaprop-p-ethyl Japanese rhodomyrtus tomentosa |
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| CN110326476A (en) * | 2019-07-05 | 2019-10-15 | 南京农业大学 | A kind of research auxiliary agent prevents and kill off the indoor biometrics method regulation of farmland weed synergistic effect to herbicide |
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