A kind of bactericidal composition that contains fluazinam and phosethyl-Al and uses thereof
(1) technical field
The present invention relates to a kind of bactericidal composition and purposes, relate in particular to a kind of bactericidal composition that contains fluazinam and phosethyl-Al and uses thereof.
(2) background technology
Fluazinam (Fluazinam) is the phenyl amines protective fungicide, and its mechanism of action is that the mitochondria phosphorous oxide is extremely dissolved coupling agent, gives sprouting, mycelia breakthrough, growth and sporulation by the inhibition spore and suppresses infecting of pathogen.The fluazinam fungicidal spectrum is wide, and effect is better than the GPF (General Protection False bactericide.Applicable crops is wide in grape, apple, pears, oranges and tangerines, wheat, soybean, potato, tomato, cucumber, paddy rice, tea, lawn etc., to interlink spore genus, Botrytis, Phytophthora, Plasmopara, Sclerotinia and Venturia bacterium are very effective, as gray mold of cucumber, rot, downy mildew, anthracnose, powdery mildew, stem's pestilence of rotting, tomato late blight, apple scab, leaf spot, the pears black spot, rust, paddy rice pain slightly is sick, banded sclerotial blight, the oat hat lures disease, grape grey mould, downy mildew, citrus scab, gray mold, potato late blight, lawn spot disease.Botrytis cinerea to anti-benzimidazole type and dicarboximide class biocide agent also has good result.Resistance of rainwater washing against, the lasting period is long.Except bactericidal activity, fluazinam also has certain acaricidal activity, engraves mite, kamisawa tetranychus etc. as citrus red mite, China pink.
But fluazinam does not have systemic activity and therapeutic action, can't enter in the plant corpus by plant surface, though a lot of pathogens there is bactericidal activity preferably, really not ideal in the practical application of field.
Phosethyl-Al (Fosetyl-aluminium) is the organic phosphor systemic fungicide, has two-way conduction function, tool protection and therapeutic action, and its mechanism of action is the synthetic of system lecithin, thereby destroys the structure of cytoplasma membrane.Phosethyl-Al has preventive effect preferably to phytophthora root rot and the downy mildew of Phycomycetes.Be applicable to that fruit tree, vegetables, flowers, cotton, tobacco, rubber, beer spill economic crops such as flower, potato and prevent and treat diseases such as various downy mildew, eqpidemic disease.This product can be made seed dressing, spraying, filling root, impregnating usefulness.
Though phosethyl-Al has good two-way conduction function, fungicidal spectrum is narrow, because single agent is used for a long time, has caused the continuous increase of formulation rate again, and peasant's use cost is increased, and has strengthened resistance risk again.
(3) summary of the invention
One of purpose of the present invention is to overcome above-mentioned deficiency, provide a kind of applied widely, effective, cost is low, the residual low bactericidal composition that contains fluazinam and phosethyl-Al.
Two of purpose of the present invention is to provide a kind of purposes that contains the bactericidal composition of fluazinam and phosethyl-Al.
The object of the present invention is achieved like this:
A kind of bactericidal composition that contains fluazinam and phosethyl-Al, described composition contains fluazinam and phosethyl-Al, and the weight ratio of described fluazinam and phosethyl-Al is 2~50: 2~49.
The optimization weight ratio of described fluazinam and phosethyl-Al is 5~40: 5~40.
The weight ratio of described fluazinam and phosethyl-Al is 1: 11,1: 9,1: 7,1: 5,1: 3,1: 1,3: 1,5: 1,7: 1 or 9: 1.
Described combination dosage form is any one formulation that allows on the agricultural chemicals.
Described combination dosage form is wetting powder, water dispersible granules, suspending agent, aqueous emulsion or missible oil.
Described fluazinam and the phosethyl-Al mass percent in composition is 5~90%.
A kind of purposes that contains the bactericidal composition of fluazinam and phosethyl-Al is used for the medicine as cereal crop, melon and fruit or vegetable crop disease.
Be used for medicine as cucumber downy mildew.
Compared with prior art, the invention has the beneficial effects as follows:
(1) present composition synergistic effect of doing well in certain ratio range, the bactericidal effect of composition have had than single agent and have significantly improved, and have reduced agricultural chemicals using dosage and cost simultaneously, have reduced residually, have also alleviated the harmful effect to environment;
(2) the mechanism of action difference of two kinds of active components among the present invention, the application of composition can delay or overcome the resistance of pathogen, prolongs the service life of product;
(3) present composition scope of application increases, be applicable to the disease of crops such as control cereal crop, various melon and fruit, vegetables, crop pests such as paddy rice, wheat, tomato, banana, apple, pears particularly are as rice blast, wheat powdery mildew, early blight of tomato, alternaria leaf spot of apple, pear scab etc.;
(4) in control agricultural crops disease, the present composition also can doublely be controlled mite pest such as citrus red mite, China pink is engraved mite, kamisawa tetranychus etc.
(4) embodiment
Clearer in order to be purpose of the present invention, technical scheme and advantage, the present invention describes with following instantiation, but the present invention is not limited to these examples.
The present composition is an active ingredient with fluazinam and phosethyl-Al, finds through the indoor bioassay test, and antagonistic drug venereal disease evil had obvious role in synergism after both were composite, specifically was illustrated with following biologicall test example.
The example of measuring in kind: the composite toxicity test of fluazinam and phosethyl-Al to cucumber downy mildew
1, subjects: bacterium of downy mildew of cucumber
2, test method:, adopt the pastille medium therapy with reference to " pesticide bioassay test rule NY/T1156.2-2006 ".
3, data statistic analysis: analyze with the SAS6.12 statistical software.Calculate mycelial growth inhibition rate (%) according to test data, obtain virulence regression equation formula, correlation coefficient (r), EC
50And co-toxicity coefficient.
4, evaluation method: with reference to " pesticide bioassay test rule NY/T1156.2-2006 ", according to Sun﹠amp; The co-toxicity coefficient method (CTC) of Johnson (1960) is estimated the synergistic effect of pharmacy mix, and promptly CTC≤80 are antagonism, and 80<CTC<120 are summation action, and CTC 〉=120 are synergistic effect.
5, result and analysis
The toxicity test that makes up bacterium of downy mildew of cucumber that is mixed of fluazinam, three second aluminium phosphates and the two different proportion thereof the results are shown in Table 1, and " fluorine: three " is writing a Chinese character in simplified form of " fluazinam: three second aluminium phosphates " in the table 1.
Table 1 fluazinam and three second aluminium phosphates are mixed to the toxicity test result of bacterium of downy mildew of cucumber
Indoor biometrics is the result show, fluazinam and three second aluminium phosphates are mixed with the ratio of 1: 11,1: 9,1: 7,1: 5,1: 3,1: 1,3: 1,5: 1,7: 1 and 9: 1, it all shows synergistic effect to bacterium of downy mildew of cucumber, and is wherein better with the synergistic effect of 1: 5,1: 3 and 3: 1.Therefore, only relatively can look 1: 5,1: 3 and 3: 1 from the synergy virulence is the best proportioning that fluazinam and three second aluminium phosphates are mixed.As for which kind of ratio being mixed in the production reality, still needing and take all factors into consideration decision in conjunction with synergy virulence, Financial cost, processing technology and toxicity etc.
The present composition can be with known auxiliary agent and assistant agent, with known method preparation and be fit to agricultural and go up any one formulation of using, wherein reasonable formulation has missible oil, water dispersible granules, aqueous emulsion, suspending agent and wetting powder, and these known auxiliary agents, assistant agent have dispersant, diffusant, defoamer, wetting agent, disintegrant, filler etc.
Below describe with instantiation.
Embodiment 1:
Fluazinam 10g, phosethyl-Al 30g, dodecyl sodium sulfate 5g, phenethyl phenol polyethenoxy ether 3g, diesel oil are added to 100g, be mixed to even liquid phase, make the present composition 40% missible oil.
Embodiment 2:
Fluazinam 10g, phosethyl-Al 50g, dispersing agent NNO (sodium methylene bis-naphthalene sulfonate) 4.5g, sodium lignin sulfonate 3g, kaolin are added to 100g,, make the present composition 60% water dispersible granules through the comminution by gas stream granulation.
Embodiment 3:
With fluazinam 30g, phosethyl-Al 10g, dodecyl sodium sulfate 5g, polyoxyethylene nonylphenol ether 3g, dispersing agent NNO 2g, xanthans 0.2g propane diols 5g, suitable quantity of water, to mix through wet grinding, homogenizing makes the present composition 40% suspending agent.
Embodiment 4:
Fluazinam 20g, phosethyl-Al 20g, dispersing agent NNO 4.5g, sodium lignin sulfonate 3g, white carbon 5g, kaolin are added to 100g, mix making the present composition 40% wetting powder through comminution by gas stream.
Embodiment 5:
With fluazinam 5g, phosethyl-Al 5g, dimethylbenzene 6g, alkylaryl formaldehyde resin APEO 10g, alkylphenol polyoxyethylene phosphate 1g, ethylene glycol 4g, xanthans 0.1g, organic silicone 0.1g, suitable quantity of water, the preparation oil phase, the preparation water, under high shear, add in the oil phase with the even aqueous phase of oil phase or with water, shear and make the present composition 10% aqueous emulsion.
Application Example:
The preparation control cucumber downy mildew test that utilizes the foregoing description to make.
1, test is handled: this test medicine consumption is established three concentration of treatment respectively according to the difference of each composition, and the contrast medicament is respectively commercially available agricultural chemicals 50% fluazinam suspending agent, 40% phosethyl-Al wetting powder and clear water blank.
2, test method: test and Selection is carried out at the more serious field piece of bacterium of downy mildew of cucumber over the years, and testing each sub-district is 30m2, repeats 4 times.Investigation method and evaluating drug effect are undertaken by GB/T 17980.26-2000.
3, result of the test such as following table:
Annotate: a is illustrated on α=0.05 level significantly, and b is illustrated on α=0.05 level variant, c be illustrated in have on α=0.05 level not remarkable.
Field control effectiveness test shows that fluazinam and phosethyl-Al bactericidal composition have good preventive effect to bacterium of downy mildew of cucumber, and control efficiency is better than single agent kind.