Background technology
Fluorine azoles bacterium acid amides (fluxapyroxad), chemical name: 3-(difluoromethyl)-1-methyl-N-(3', 4', 5'-trifluoro[1,1'-biphenyl]-2-yl)-1H-pyrazole-4-carboxamide, molecular formula: C
18h
12f
5n
3o.Structural formula is as follows:
Pyrazole amide series bactericidal agent, is succinate dehydrogenase inhibitors, and control is had both.The respiration of its energy Antifungi, suppresses spore-germination, and germ tube extends, mycelial growth and sporulation.Can be used for controlling and suppressing the multiple fungal disease in various crop.
Tebuconazole (Tebuconazole), molecular formula: C
16h
22clN
3o, chemical name: (RS)-1-(4-chlorphenyl)-4,4-dimethyl-3-(1H-1,2,4 triazol-1-yl methyl) penta-3-alcohol.Structural formula:
Tebuconazole belongs to triazole bactericidal agent, is sterol demethylation inhibitor.Tebuconazole is a kind of efficient, wide spectrum, interior absorption triazole bactericidal agent, has protection, treats, roots out three large functions, and fungicidal spectrum is wide, the lasting period is long.These product are used for preventing and treating sclerotinia rot of colza, and not only preventive effect is good, and have resistant to lodging, the feature such as production-increasing function is obvious.The efficient germicide spraying for seed treatment or the face of Important Economic crop, multiple rust, powdery mildew, net blotch, root rot, the head blight that can effectively prevent and treat cereal crop, smut and kind pass zonate spot etc.
The difficulty of prevention and cure of phytopathogen is increasing at present, and on the one hand, along with the change of pattern of farming, the economic crops cultivated areas such as melon and fruit, vegetables progressively expand, and disease occurrence degree, generation quantity all increase, and in control, difficulty strengthens; On the other hand, the resistance of pathogen rises year by year under lasting medicament selection pressure, and the control efficiency of single dose is had a greatly reduced quality, and control of plant disease is faced with significant challenge.
Summary of the invention
The object of the invention is provides a kind of applied widely, fluorine-containing azoles bacterium acid amides that cost is low, effective and the plant bactericidal composition of Tebuconazole for above-mentioned technical problem.
A further object of the invention is to provide the application of this bactericidal composition on the medicine of preparation control Cereal, fruit tree, vegetable crop resistance plant fungal disease.
The object of the invention is to realize by following measures:
A kind of bactericidal composition, it is take fluorine azoles bacterium acid amides and kresoxim-methyl as main active ingredient, and wherein fluorine azoles bacterium acid amides and kresoxim-methyl weight ratio are 1 ~ 90:1 ~ 90, are preferably 5 ~ 70:5 ~ 80, more preferably 5 ~ 50:5 ~ 40.
In bactericidal composition of the present invention, the two quality percentage composition that accounts for composition of fluorine azoles bacterium acid amides and kresoxim-methyl is 2 ~ 90%, preferably 10 ~ 80%.Wherein in bactericidal composition, effective ingredient is present in composition with synergy effective dose." % " of the present invention is quality percentage composition.
Described bactericidal composition, take fluorine azoles bacterium acid amides and kresoxim-methyl as main active ingredient and known auxiliary agent and excipient be re-dubbed any one formulation allowing on agricultural chemicals.Described formulation preferred water dispersible granule, wet seed dressing, missible oil, wetting powder, suspending agent, oil suspending agent, suspension emulsion, suspension seed-coating agent, aqueous emulsion or microemulsion.
Described auxiliary agent comprises surfactant, antifreezing agent, thickener, antifreezing agent, solvent and filler etc.
Described surfactant comprises calcium dodecyl benzene sulfonate, alkylphenol polyoxyethylene, Ben-zylphenol Polyoxyethyl Ether, phenethyl phenol polyethenoxy ether, fatty alcohol-polyoxyethylene ether and similar products thereof, aliphatic amine polyoxyethylene ether, fatty acid ethylene oxide adduct, the rare block compound of polyoxyethylene polyoxy third, castor oil polyoxyethylene ether, neopelex, lauryl sulfate, tween series, fatty alcohol-polyoxyethylene ether, polyethylene glycol series, Sulfonates, carboxylate, sulphate, phosphate, phosphite, lignosulfonates, phenol formaldehyde condensate, ammonium salt, one or more combinations in quaternary etc.
Described thickener is selected from xanthans, organobentonite, aluminium-magnesium silicate and white carbon etc.Described solvent is solvent naphtha, vegetable oil and water.Described antifreezing agent is ethylene glycol and propane diols.Described filler is mainly kaolin, corn starch, ammonium sulfate and fine particle calcium carbonate etc.
Above auxiliary agent, excipient and other auxiliary material can alone or and use.
The application of described bactericidal composition on the medicine of preparation control Cereal, fruit tree, vegetable crop resistance plant fungal disease, particularly prevent and treat the application on the germ killing drugs of powdery mildew, gray mold, stalk break, rot, rust, Ying's rot, net blotch, downy mildew, rice blast and damping off in preparation, the application especially preventing and treating on the germ killing drugs of wheat rust and powdery mildew of cucumber in preparation has significant effect.
Compared with prior art beneficial effect of the present invention: (1) is compared with single dose, the present composition scope of application increases, expanding prevention spectrum, sac fungi, basidiomycetes, imperfect fungus and Oomycete fungal disease are had to good control efficiency, especially antagonism fungal disease, as the fungal diseases such as powdery mildew, gray mold, stalk break, rot, rust, Ying's rot, net blotch, downy mildew, rice blast, damping off have obvious synergistic function, has obviously improved control efficiency; (2), compared with single dose, the activity of mixture is greater than the activity of independent component, has reduced production and use cost, has reduced control recruitment, drug cost; (3) suppress insect or the drug-fast generation of fungi to unitary agent (fluorine azoles bacterium acid amides and Tebuconazole are arbitrary), its successful uses higher than its single dose, overcomes and has delayed pesticide resistance, alternative routine and easily produce the agricultural chemicals of resistance.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and in embodiment, the preparation method of formulation is conventional method.
Embodiment 1:
Take 5g fluorine azoles bacterium acid amides, 20g Tebuconazole, 4g sodium lignin sulfonate, 2g lauryl sodium sulfate, 2g white carbon, corn starch adds to 100g, and being mixed with quality percentage composition according to conventional formulation method is 25% water dispersible granules.
Embodiment 2:
Take 15g fluorine azoles bacterium acid amides, 20g Tebuconazole, 3g phenethyl phenol polyethenoxy ether phosphate, 2g alkylphenol polyoxyethylene, 13g C
5-C
8solvent naphtha, 5g ethylene glycol, add water to 100g, and being mixed with quality percentage composition according to conventional formulation method is 35% aqueous emulsion.
Embodiment 3:
Take 5g fluorine azoles bacterium acid amides, 10g Tebuconazole, 6g calcium dodecyl benzene sulfonate, 3g neopelex, 1g alkylphenol polyoxyethylene, 15g C
5-C
8solvent naphtha, 10g propane diols, add water to 100g, and being mixed with quality percentage composition according to conventional formulation method is 15% microemulsion.
Embodiment 4:
Take 10g fluorine azoles bacterium acid amides, 40g Tebuconazole, 3g phenethyl phenol polyethenoxy ether phosphate, 1g alkylphenol polyoxyethylene, 0.1g xanthans, 5g propane diols, add water to 100g, being mixed with quality percentage composition according to conventional formulation method is 50% suspending agent.
Embodiment 5:
Take 40g fluorine azoles bacterium acid amides, 10g Tebuconazole, 5g sodium lignin sulfonate, 2g calcium dodecyl benzene sulfonate, add kaolin to 100g, being mixed with quality percentage composition according to conventional formulation method is 50% wetting powder.
Embodiment 6:
Take 5g fluorine azoles bacterium acid amides, 10g Tebuconazole, 8g calcium dodecyl benzene sulfonate, 5g phenethyl phenol polyethenoxy ether, add C
5-C
8solvent naphtha is to 100g, and being mixed with quality percentage composition according to conventional formulation method is 15% missible oil.
Embodiment 7:
Take 10g fluorine azoles bacterium acid amides, 20g Tebuconazole, 3g phenethyl phenol polyethenoxy ether phosphate, 1g alkylphenol polyoxyethylene, 1g organobentonite, 5g propane diols, vegetable oil complements to 100g, and being mixed with quality percentage composition according to conventional formulation method is 30% oil suspending agent.
Embodiment 8:
Take 20g fluorine azoles bacterium acid amides, 60g Tebuconazole, 8g sodium lignin sulfonate, 2g lauryl sodium sulfate, 5g ammonium sulfate, 3g white carbon, fine particle calcium carbonate complements to 100g, and being mixed with quality percentage composition according to conventional formulation method is 80% water dispersible granules.
Embodiment 9:
Take 10g fluorine azoles bacterium acid amides, 40g Tebuconazole, 8g sodium lignin sulfonate, 2g lauryl sodium sulfate, 5g ammonium sulfate, kaolin complements to 100g, and being mixed with quality percentage composition according to conventional formulation method is 50% wet seed dressing.
Embodiment 10:
Take 5g fluorine azoles bacterium acid amides, 45g Tebuconazole, 4g sodium lignin sulfonate, 2g polyoxyethylene poly-oxygen propylene aether, 0.15g xanthans, 5g propane diols, 0.5g aluminium-magnesium silicate, water complements to 100g, and being mixed with quality percentage composition according to conventional formulation method is 50% suspension seed-coating agent.
Embodiment 11:
Take 10g fluorine azoles bacterium acid amides, 20g Tebuconazole, 1g calcium dodecyl benzene sulfonate, 3g alkylphenol polyoxyethylene phosphate, 2g aliphatic acid polyethenoxy ether, 1g organobentonite, 5g propane diols, 10g vegetable oil, water complements to 100g, and being mixed with quality percentage composition according to conventional formulation method is 30% suspension emulsion.
Embodiment 12
Indoor biometrics test:
In indoor employing mycelial growth rate method, measure the EC of different medicaments to bacterial strain
50value, adopts co-toxicity coefficient computational methods, calculates the co-toxicity coefficient (CTC) of mixture, determines the synergy of mixture, and circular is as follows:
(conventionally select EC take a certain single dose in mixture as standard medicament
50junior), calculate:
Single dose toxicity index=standard medicament EC
50/ certain single dose EC
50× 100
Toxicity index × B single dose proportion in mixture of toxicity index × A single dose proportion+B single dose in mixture of theoretical toxicity index=A single dose
The EC of actual measurement toxicity index=standard single dose
50the EC of value/mixture
50value × 100
Co-toxicity coefficient=actual measurement toxicity index/theoretical toxicity index × 100
Co-toxicity coefficient classification: CTC is greater than 120 o'clock mixtures and has synergetic, and it is antagonism that CTC is less than at 80 o'clock, and CTC is summation action between 80 ~ 120.
The indoor biometrics result of the different proportionings of table 1 fluorine azoles acyl bacterium amine-Tebuconazole to wheat rust
Medicament |
EC
50(mg/L)
|
Actual measurement toxicity index |
Theoretical coefficient |
Co-toxicity coefficient |
Fluorine azoles bacterium acid amides (A) |
14.43 |
100 |
|
- |
Tebuconazole (B) |
53.87 |
26.787 |
|
- |
A:B=10:1 |
10.78 |
133.86 |
93.344 |
143.40 |
A:B=5:1 |
11.48 |
125.7 |
87.798 |
143.17 |
A:B=3:1 |
12.86 |
112.21 |
81.697 |
137.35 |
A:B=1:1 |
14.03 |
102.85 |
63.393 |
162.24 |
A:B=1:2 |
16.36 |
88.203 |
51.191 |
172.30 |
A:B=1:4 |
24.54 |
58.802 |
41.429 |
141.93 |
A:B=1:8 |
30.07 |
47.988 |
34.922 |
137.42 |
The explanation of table 1 result of the test, the composite wheat rust of preventing and kill off of fluorine azoles acyl bacterium amine and Tebuconazole, proportioning all has synergistic effect in said ratio, and wherein the synergistic effect of proportioning 1:2 is the most remarkable.
The indoor biometrics result of the different proportionings of table 2 fluorine azoles acyl bacterium amine-Tebuconazole to powdery mildew of cucumber
Medicament |
EC
50(mg/L)
|
Actual measurement toxicity index |
Theoretical coefficient |
Co-toxicity coefficient |
Fluorine azoles bacterium acid amides (A) |
12.57 |
100 |
|
- |
Tebuconazole (B) |
46.78 |
26.87 |
|
- |
A:B=10:1 |
10.01 |
125.57 |
93.352 |
134.52 |
A:B=5:1 |
11.21 |
112.13 |
87.812 |
127.70 |
A:B=3:1 |
12.36 |
101.7 |
81.718 |
124.45 |
A:B=1:1 |
14.57 |
86.273 |
63.435 |
136.00 |
A:B=1:2 |
15.26 |
82.372 |
51.247 |
160.74 |
A:B=1:4 |
22.76 |
55.228 |
41.496 |
133.09 |
A:B=1:8 |
28.79 |
43.661 |
34.996 |
124.76 |
The explanation of table 2 result of the test, the composite powdery mildew of cucumber of preventing and kill off of fluorine azoles acyl bacterium amine and Tebuconazole, proportioning all has synergistic effect in said ratio, and wherein the synergistic effect of proportioning 1:2 is the most remarkable.
Known by above test, the present invention has good synergistic effect to plant disease.
Field control effectiveness test:
Prevent and treat the test of wheat rust and powdery mildew of cucumber with the pesticidal preparations that embodiment 1 ~ 3 makes.
1, test is processed: this test medicine consumption is established respectively three concentration for the treatment of according to the difference of each composition, and contrast medicament is respectively agricultural chemicals single dose 25% fluorine azoles bacterium acid amides SC and 25% Tebuconazole EC and the test of blank clear water.
2, test method: each community area is 66.7m
2, repeat 3 times; Investigation drug effect method before dispenser after Investigation and Prevention is: random sampling 5 points in test treatment region, carry out severity Scaling according to national field trial relevant criterion, and calculate preventive effect.
Severity Scaling standard:
0 grade: without scab;
1 grade: lesion area accounts for below 5% of whole leaf area;
3 grades: lesion area accounts for the 6%-10% of whole leaf area;
5 grades: lesion area accounts for the 11%-25% of whole leaf area;
7 grades: lesion area accounts for the 26%-50% of whole leaf area;
9 grades: lesion area accounts for the more than 50% of whole leaf area.
Disease index=100 × ∑ (the sick numbers of sheets at different levels × typical values at different levels)/(investigating total number of sheets × highest typical value)
3, result of the test sees the following form 3 and table 4:
The field efficacy result of table 3 fluorine azoles acyl bacterium amine-Tebuconazole composition to wheat rust
Note: a, b, c, d represent the otherness on 0.05 aqua.
The field efficacy result of table 4 fluorine azoles acyl bacterium amine-Tebuconazole composition to powdery mildew of cucumber
Note: a, b, c, d represent the otherness on 0.05 aqua.
Show by indoor biometrics and field efficacy result, fluorine azoles bacterium acid amides and Tebuconazole composition have obvious synergistic function, and the control efficiency of composition is good, and control efficiency is all better than single dose kind, in agricultural application, have using value.