CN102379291A - Bactericidal combination containing difenoconazole and kasugamycin - Google Patents
Bactericidal combination containing difenoconazole and kasugamycin Download PDFInfo
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- CN102379291A CN102379291A CN2010102678711A CN201010267871A CN102379291A CN 102379291 A CN102379291 A CN 102379291A CN 2010102678711 A CN2010102678711 A CN 2010102678711A CN 201010267871 A CN201010267871 A CN 201010267871A CN 102379291 A CN102379291 A CN 102379291A
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Abstract
The invention relates to a bactericidal combination, which comprises difenoconazole and kasugamycin and can be processed to be wettable powder. When the bactericidal combination is used for tests by adopting a rice blast and banded sclerotial blight germ spawn growth speed method, according to results, the bactericidal combination has the advantages that the synergistic effect is very good under a compound situation, the rate of inhibiting rice blast and banded sclerotial blight germs is high and the inhibiting rice blast and the rice banded sclerotial blight can be effectively prevented and controlled.
Description
Technical field
The present invention relates to agricultural chemicals, is a kind of composition that contains Difenoconazole and kasugarnycin bactericide.
Background technology
Paddy rice is one of China's staple food crop, and cultivated area accounts for national arable area 1/4, and annual production accounts for 1/2 of total output of grain.Yet Rice Production receives the influence of disease always, and present prevents and treats under the condition, and the whole nation is every year on average because the underproduction that various rice diseases cause reaches 2,000,000 kilograms.Rice blast and banded sclerotial blight are popularity and two kinds of maximum diseases of harmfulness in the rice disease, all are that the harm region is extremely wide, even No kernels or seeds are gathered, as in a year of scarcity can to cause paddy rice due to the fungal infection.China's control rice blast is mainly with tricyclazole, Isoprothiolane, IBP position, and banded sclerotial blight is main with jinggangmeisu, kasugarnycin.
Difenoconazole is that the systemic fungicide of wide spectrum, safety disturbs the normal growth of germ through the biosynthesis that suppresses ergosterol, and the sporulation of phytopathogen is had had strong inhibitory effects.Be widely used at present and prevented and treated the microbial scab of cause of diseases such as sac fungi, basidiomycetes, imperfect fungus, powdery mildew, leaf spot, rust etc., but because long-term use, above-mentioned disease p-phenylene's methyl cyclic-azole produces serious pesticide resistance.
Kasugarnycin belongs to agricultural antibiotic class low toxicity bactericide, has stronger interior suction permeability, has prevention and therapeutic action simultaneously.The mechanism of action is to disturb the esterase system of the metabolism of amino acid of germ, and broken biosynthesis of changing protein suppresses the growth of mycelia and causes cell granulationsization, makes germ lose breeding and infection ability, thereby reaches the purpose that kill pathogens is prevented and treated disease.Bacterium, yeast and fungi are all had activity, especially the spore germination of rice blast fungus and library germ, mycelial growth and steamed stuffed bun are formed by suppressing amino acid and becoming the effect of protein.Kasugarnycin is applied to crops such as paddy rice, suppresses the synthetic and even mycelial growth of rice blast protein significantly, makes peptide bond elongate the activity of peptide for inhibiting transferase.
Summary of the invention
The technical problem that the present invention will solve provides a kind of for preventing and treating the bactericidal composition that rice blast and rice sheath blight disease have synergistic effect.
The following technical scheme of the present invention solves above-mentioned technical problem: sterilization combination of the present invention room is composed of the following components: the conventional auxiliary agent of Difenoconazole and kasugarnycin and agricultural chemicals; Difenoconazole and kasugarnycin are as active component in this bactericidal composition; The weight ratio of Difenoconazole and kasugarnycin is 1～70: 1～40; More excellent weight ratio is 1～50: 1～25, and optimum weight percent is 1～20: 1～15, and auxiliary agent and excipient are 10%～90%.
Described auxiliary agent and excipient comprise dispersant, wetting agent, filler.
Described dispersant is selected from one or more in polycarboxylate, lignosulfonates, APES formaldehyde condensation products sulphate, alkyl benzene sulfonate calcium salt, naphthalene sulfonic acid-formaldehyde condensation product sulphate, APES, aliphatic amine polyoxyethylene ether, polyoxyethylene carboxylate, the fatty acid glyceride APEO.
Described wetting agent is selected from: one or more in lauryl sodium sulfate, DBSA, Nekal BX, moistening bleeding agent F, alkylnaphthalene sulfonate, polyoxyethylene triphenylethylene phosphenylic acid salt, spaonin powder, silkworm excrement, the soapberry powder.
Described filler is selected from: one or more in kaolin, diatomite, bentonite, attapulgite, white carbon, starch, the precipitated calcium carbonate.
Technical scheme of the present invention: described bactericidal composition preparation is a wetting powder, and the percentage by weight of component does
Difenoconazole 1～70%
Kasugarnycin 1～40%
Dispersant 3～10%
Wetting agent 1～5%
The filler surplus
The concrete production stage of this wettable powder agent formulation is: by above-mentioned prescription with Difenoconazole and kasugarnycin and dispersant, wetting agent, filler mixing; In stirred tank, evenly stir; After airslide disintegrating mill is pulverized, mix again, can make the wettable powder agent formulation of the present composition.
The advantage of bactericidal composition:
1, these two kinds of combination of active principles are used, and have enlarged fungicidal spectrum;
2, have synergistic effect, through the indoor biometrics test determination, Difenoconazole and kasugarnycin are composite by a certain percentage, to rice blast and banded sclerotial blight germ virulence have synergistic effect clearly;
3, use cost is low, and Difenoconazole and kasugarnycin cost are than higher at present, and the independent result of use of low dosage is not again fine, so Difenoconazole and kasugarnycin combination use bactericidal effect height, has reduced cost again.
Embodiment: the joint toxicity measuring test of Difenoconazole and kasugarnycin
1 materials and methods
1.1 test material
1.1.1 supply the reagent agent
95% difenoconazole technical material, Jiangsu Qizhou Green Chemical Co., Ltd produces; The former medicine of 55% kasugarnycin, Jilin Province prolongs limit spring thunder Bioceuticals Inc. and produces;
1.1.2 supply the examination pathogen
Rice blast fungus, the rice blast leaf of gathering from Guizhou adopts the conventional organization partition method to obtain bacterial strain, on the PDA medium, cultivates behind the purifying.
1.1.3 supply the examination medium
PDA medium: potato 200g, glucose 20g, agar 20g, water 1000ml
Pyricularia oryzae produces the spore medium: in above-mentioned PDA medium, add 200g tomato juice/L, transfer PH to 7.0.
1.2 test method and synergistic effect are measured
1.2.1 single agent toxicity test
1.2.1.1 soup preparation
Difenoconazole technical material dissolves with proper amount of acetone, is made into 1000 μ g/ml mother liquors, with 0.1% Tween solution mother liquor is diluted to 5～6 concentration gradients again.
Kasugarnycin dissolves with sterile water, is diluted to 5～6 concentration gradients.
1.2.1.2 spore germination method toxicity test.
At first prepare spore suspension, have to cultivation to add an amount of sterile water on the product spore medium of Pyricularia oryzae, gently brush with writing brush, microscopically is observed, under the low power lens about 100 spores in every visual field.
Secondly from the low concentration to the high concentration, draw 60 microlitre soups successively with liquid-transfering gun and add respectively in the small test tube, draw spore suspension 60 microlitres then, make soup and spore suspension mixed in equal amounts even.Draw 30 microlitre mixed liquors with liquid-transfering gun and drip on the slide that has the fine jade film-making, frame is put in the big culture dish that has shoaling layer, adds a cover and places 28 ℃, and the mold incubator of RH80% is cultivated 20～24h.Every processing repetition 4 times compares with the spore suspension of adding medicine not.
1.2.1.3 data statistic analysis
When the blank spore germination rate reaches 90% when above, the spore germination situation is respectively handled in inspection.
Every processing repeats 3 visuals field of random observation, about 200 spores of every processing investigation, writes down sprouting number and spore sum respectively with counter.
Concentration logarithm value for the reagent agent is an independent variable, is dependent variable with spore germination relative inhibition probit value, carries out the data analysis statistics with the DPS data handling system, obtains virulence regression equation, EC50 value and correlation coefficient.
Spore germ tube length is regarded as sprouting greater than the spore radius.
Spore germination rate=(spore germination number/investigation spore sum) * 100
Handle and correct spore germination rate=(handling spore germination rate/blank spore germination rate) * 100
Spore germination relative inhibition=(handle and correct spore germination rate/blank spore germination rate) * 100
On the basis of preliminary experiment, respectively single agent Difenoconazole and kasugarnycin are carried out toxicity test in order to last method, the two EC
50Value is respectively 3.02mg/l and 1.21mg/l.
Combination is provided with 1.2.2 be mixed
15% Difenoconazole kasugarnycin wetting powder mass ratio was respectively 8: 1,4: 1,1: 1,1: 4,1: 8, i.e. 13.3%+1.7%, 12%+3%, 7.5%+7.5%, 3%+12%, 1.7%+13.3% totally 5 combinations that are mixed.
1.2.3 mixture toxicity test
Carry out the toxicity test of mixture according to mixed ratio with single agent toxicity test method.
EC that each that will measure according to the abundant method of Sun Yun handled
50Value is converted into the actual toxicity index (ATI) of using with; According to the proportioning of mixture, obtain theory and use toxicity index (TTI) with, calculate the co-toxicity coefficient (CTC) of mixture by following formula.
Single agent toxicity index=(standard medicament EC
50/ confession reagent agent EC
50) * 100
ATI=(standard medicament EC
50/ confession reagent agent (using with) EC
50) * 100
The content (%) of toxicity index * B in using with of content (the %)+B of toxicity index * A of TII=A in using with
CTC＝(ATI/TTI)*100
If co-toxicity coefficient is big by 120, showing has synergistic effect; If be starkly lower than 100 (below 80), be indicated as antagonism; Between 100～120, be indicated as summation action
Data are seen table 1
The different proportioning Difenoconazole of table 1 kasugarnycin mixture is to the virulence and the synergistic effect of rice blast fungus
The composite co-toxicity of table 2 Difenoconazole and kasugarnycin to rice blast fungus
2 results and analysis
According to bactericide joint toxicity measuring result; Difenoconazole and kasugarnycin mass ratio are that 4: 1 o'clock co-toxicity coefficient is respectively 141.0, and be obviously big by 120, shows as synergistic effect; Other ratios are all greater than 100; Show as the increase effect, comprehensive synergistic effect and reagent cost think that Difenoconazole and kasugarnycin mass ratio are best proportioning at 4: 1.
3 field trials are measured the control efficiency to rice blast and rice sheath blight disease
3.1 field trial is measured the control efficiency to rice blast
3.1.1 application method
Test dispenser twice altogether, check plot spray equivalent clear water.When making up a prescription, after with low amounts of water medicament fully being dissolved earlier, add the suitable quantity of water processing of comprehensively spraying again, even spraying sprays rice strain middle and lower part emphatically.All adopting power driven sprayer, operating pressure during the spray medicine is 2.0～2.3kg/cm
2, shower nozzle aperture 1.2mm.The sub-district spouting liquid is used by 675 liters/hectare, and soup is sprayed application to the positive and negative two sides of crop leaf uniformly.
3.1.2 investigation method
3.1.2.1 leaf pest investigation method
Experimental field be located at the Hunan paddy field, the field of selecting the more consistent leaf seasonal febrile diseases of growing way their early stage is for experimental field, and middle fertility is well-managed.
Every sub-district is got 4 points at random, the whole blades of five strains during investigation, and a situation arises for the statistics disease.
Every leaf writes down total number of sheets, the sick number of sheets at different levels by the percentage classification that scab accounts for leaf area, calculates the blade incidence of disease, disease index, refers to comparison with the contrast disease, calculates relative control effect.
State of an illness grade scale (is unit with the blade)
Sick level victimization state
0 grade: do not have scab on the blade;
1 grade: scab is a syringe needle shape size foxiness;
2 grades: big slightly brown point;
3 grades: circular to oval-shaped grey scab, edge brown, about 1～2 millimeter of scab diameter;
4 grades: typical spindle scab, long 1～2 centimetre, be confined to usually between 2 veins, the area of causing harm is no more than 2% of blade area;
5 grades: typical spindle scab, the area of causing harm is no more than 10% of leaf area;
6 grades: typical spindle scab, the area 10.1～25% of causing harm;
7 grades: typical spindle scab, the area 25.1～50% of causing harm;
8 grades: typical spindle scab, the area 50.1～75% of causing harm;
9 grades: full leaf is withered.
The panicle blast disease tassel yield is estimated grade scale:
Sick level victimization state
0 grade: anosis;
1 grade: disease tassel yield is lower than 1～5%;
3 grades: disease tassel yield is lower than 5.1～10%;
5 grades: disease tassel yield is lower than 10.1～25%;
7 grades: disease tassel yield is lower than 25.1～50%;
9 grades: disease tassel yield is lower than 50.1～100%.
3.1.3 control time and number of times
Leaf pest control times
In the rice tillering intermediary and later stages, leaf blast in rice gets into their early stage and investigates, investigation disease index before the medicine, and each investigation in 7 days was once observed its lasting effect in 15 days behind the secondary medicine behind first and second time medicine, investigated altogether 4 times.
Neck pest control times
In paddy stage of yellow ripeness, to investigate after neck seasonal febrile diseases feelings are stable, week back check is once.
Test is investigated 4 times altogether, i.e. disease index investigation before the medicine, preventive effect investigation in 7 days behind the 1st medicine, 7 days and preventive effect investigation in 15 days behind 2 medicines.
3.1.4 drug effect computational methods
Sick leaf rate (the %)=sick number of sheets/investigate total number of sheets * 100
Disease index=∑ (the sick numbers of sheets at different levels * relative level numerical value)/(investigating total number of sheets * 9) * 100
Control efficiency (%)=(1-(disease index behind disease index before the blank district medicine * treatment region medicine)/(disease index before disease index behind the blank district medicine * treatment region medicine)) * 100
3.1.5 poisoning investigation method
Whether continuous 7d range estimation medicament has poisoning to crop after the dispenser.
3.1.6 result of the test and analysis
Each is handled the effect of control rice blast and sees table 3
Each handles the effect of control rice blast table 3
Interpretation of result:
Can find out that by table 3 effect of 4: 1 the combination control rice blast that is mixed of 15% Difenoconazole kasugarnycin is remarkable.Under the consumption of same every mu 15 gram, the effect of complex preparation significantly is superior to two kinds of single agent, and its quick-acting and lasting effect are all relatively good, and be the most outstanding with lasting effect especially.Complex preparation significantly is superior to the effect under the low concentration consumption in control efficiency under the consumption of high concentration.15 days lasting effect is more remarkable after 7 days control efficiency behind the 1st, 2 medicine reaches 76.93% and 81.38%, the 2 medicine respectively, reaches 84.63%.Result of the test proves that 25% Difenoconazole list agent effect obviously is superior to 6% kasugarnycin list agent.25% Difenoconazole list agent, preventive effect of 15 days after 7 days the highest control efficiency behind the 1st, 2 medicine is respectively 69.29% and 75.75%, the 2 medicine is 80.68%.And 6% kasugarnycin list agent, preventive effect of 15 days after 7 days the highest control efficiency behind the 1st, 2 medicine is respectively 66.53% and 71.56%, the 2 medicine is 76.73%.According to the field range estimation, in the test dose scope, plant growth is normal, and each is handled medicament and the poisoning phenomenon to paddy rice all do not occur, explains that it is safe to paddy rice.
3.2 field trial is measured the control efficiency to rice sheath blight disease
3.2.1 application method
Test dispenser twice altogether, check plot spray equivalent clear water.When making up a prescription, after with low amounts of water medicament fully being dissolved earlier, add the suitable quantity of water processing of comprehensively spraying again, even spraying sprays rice strain middle and lower part emphatically.All adopting power driven sprayer, operating pressure during the spray medicine is 2.0～2.3kg/cm
2, shower nozzle aperture 1.2mm.The sub-district spouting liquid is used by 675 liters/hectare, and soup is sprayed application to the positive and negative two sides of crop leaf uniformly.
3.1.2 investigation method
Experimental field be located at the Hunan, publish the medium rice field of course of disease degree for experimental field, soil fertility is medium, and irrigation and drainage are convenient.Adopt the bilinear sampling method, 5 points are got in every sub-district, look into 5 caves at every, and 2 blades in the fixing middle part of every strain fix a point to check during investigation.
Come classification according to the rice sheath blight disease grade scale, write down total strain number, diseased plant number, degree of being in a bad way, calculate diseased plant rate, disease index and preventive effect.
The rice sheath blight disease grade scale does
0 grade: complete stool is anosis;
1 grade: the 4th blade and following each leaf sheath thereof, blade morbidity (is the 1st leaf with sword-like leave);
3 grades: the 3rd blade and following each leaf sheath thereof, blade morbidity;
5 grades: the 2nd blade and following each leaf sheath thereof, blade morbidity;
7 grades: sword-like leave blade and following each leaf sheath thereof, blade morbidity;
9 grades: the complete stool morbidity, withered ahead of time.
3.1.3 control time and number of times
Test is investigated 4 times altogether, i.e. disease index investigation before the medicine, preventive effect investigation in 7 days behind the 1st medicine, 7 days and preventive effect investigation in 15 days behind 2 medicines.
3.1.4 drug effect computational methods
Diseased plant rate (the %)=total strain number of diseased plant number/investigation * 100
Disease index=∑ (diseased plant numbers at different levels * relative level numerical value)/(investigating total strain number * 9) * 100
Control efficiency (%)=(1-(disease index behind disease index before the blank district medicine * treatment region medicine)/(disease index before disease index behind the blank district medicine * treatment region medicine)) * 100
3.1.5 poisoning investigation method
Whether continuous 7d range estimation medicament has poisoning to crop after the dispenser.
3.1.6 result of the test and analysis
Each is handled the effect of preventing and treating rice sheath blight disease and sees table 4
Each handles the effect of preventing and treating rice sheath blight disease table 4
Interpretation of result:
Can find out that by table 4 effect that 4: 1 the combination that is mixed of 15% Difenoconazole kasugarnycin prevents and treats rice sheath blight disease is remarkable.Under the consumption of same every mu 15 gram, the effect of complex preparation significantly is superior to two kinds of single agent, and its quick-acting and lasting effect are all relatively good, and be the most outstanding with lasting effect especially.Complex preparation significantly is superior to the effect under the low concentration consumption in control efficiency under the consumption of high concentration.15 days lasting effect is more remarkable after 7 days control efficiency behind the 1st, 2 medicine reaches 70.03% and 75.33%, the 2 medicine respectively, reaches 82.23%.25% Difenoconazole list agent effect obviously is superior to 6% kasugarnycin list agent.
In sum; The present invention contains the sterilization combination of Difenoconazole and kasugarnycin, and to rice blast and all good control efficiency of Rhizoctonia solani Kuhn, and it is to the target crop safety; Compare with single agent; Bactericidal composition of the present invention has the advantage that quick-acting is good, the lasting period is long, and environmental pollution is few, is difficult for producing poisoning.So research and development of the present invention and popularization have crucial meaning to society.
Claims (7)
1. the bactericidal composition with synergistic effect is characterized in that, the weight ratio of two kinds of active principle Difenoconazoles and kasugarnycin is 1～70: 1～40;
2. bactericidal composition according to claim 1 is characterized in that, the more excellent weight ratio of Difenoconazole and kasugarnycin is 1～50: 1～25 in the said composition;
3. bactericidal composition according to claim 1 is characterized in that, the optimum weight percent of Difenoconazole and kasugarnycin is 1～20: 1～15 in this bactericidal composition;
4. bactericidal composition according to claim 1 is characterized in that, is used to prevent and treat rice blast and rice sheath blight disease;
5. bactericidal composition according to claim 1 is characterized in that, said bactericidal composition preparation is the wettable powder agent formulation;
6. the bactericidal composition with synergistic effect according to claim 1 is characterized in that auxiliary agent is made up of dispersant 1～10%, wetting agent 1～5%, filler 1～80%;
7. according to the said bactericidal composition of claim 6 with synergistic effect; It is characterized in that the dispersant in the auxiliary agent can adopt one or more in polycarboxylate, lignosulfonates, APES formaldehyde condensation products sulphate, alkyl benzene sulfonate calcium salt, naphthalene sulfonic acid-formaldehyde condensation product sulphate, APES, aliphatic amine polyoxyethylene ether, polyoxyethylene carboxylate, the fatty acid glyceride APEO; Wetting agent can be selected one or more in lauryl sodium sulfate, DBSA, Nekal BX, moistening bleeding agent F, alkylnaphthalene sulfonate, polyoxyethylene triphenylethylene phosphenylic acid salt, spaonin powder, silkworm excrement, the soapberry powder for use; Filler can adopt one or more in kaolin, diatomite, bentonite, attapulgite, white carbon, starch, the precipitated calcium carbonate.
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| CN2010102678711A CN102379291A (en) | 2010-08-27 | 2010-08-27 | Bactericidal combination containing difenoconazole and kasugamycin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105394047A (en) * | 2015-12-09 | 2016-03-16 | 陕西麦可罗生物科技有限公司 | Pesticide composition containing kasugamycin and epoxiconazole |
| CN110226603A (en) * | 2019-07-23 | 2019-09-13 | 江门市植保有限公司 | It is a kind of for preventing and treating the composition pesticide of potato disease insect pest |
| CN117481123A (en) * | 2023-12-29 | 2024-02-02 | 黑龙江省农业科学院水稻研究所 | Agricultural bactericidal composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176452A (en) * | 2007-12-19 | 2008-05-14 | 深圳诺普信农化股份有限公司 | Composition with building action containing middle living bacterium element and phenylate cyclazo |
| CN102100232A (en) * | 2009-12-16 | 2011-06-22 | 北京绿色农华植保科技有限责任公司 | Preparation method of chunleimeisu and difenoconazole powder |
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2010
- 2010-08-27 CN CN2010102678711A patent/CN102379291A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176452A (en) * | 2007-12-19 | 2008-05-14 | 深圳诺普信农化股份有限公司 | Composition with building action containing middle living bacterium element and phenylate cyclazo |
| CN102100232A (en) * | 2009-12-16 | 2011-06-22 | 北京绿色农华植保科技有限责任公司 | Preparation method of chunleimeisu and difenoconazole powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105394047A (en) * | 2015-12-09 | 2016-03-16 | 陕西麦可罗生物科技有限公司 | Pesticide composition containing kasugamycin and epoxiconazole |
| CN110226603A (en) * | 2019-07-23 | 2019-09-13 | 江门市植保有限公司 | It is a kind of for preventing and treating the composition pesticide of potato disease insect pest |
| CN117481123A (en) * | 2023-12-29 | 2024-02-02 | 黑龙江省农业科学院水稻研究所 | Agricultural bactericidal composition |
| CN117481123B (en) * | 2023-12-29 | 2024-03-08 | 黑龙江省农业科学院水稻研究所 | Agricultural bactericidal composition |
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Application publication date: 20120321 |