CN101715777B - Pesticide composition containing ethirimol and thiophanate-methyl, and application thereof - Google Patents

Pesticide composition containing ethirimol and thiophanate-methyl, and application thereof Download PDF

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CN101715777B
CN101715777B CN 201010019332 CN201010019332A CN101715777B CN 101715777 B CN101715777 B CN 101715777B CN 201010019332 CN201010019332 CN 201010019332 CN 201010019332 A CN201010019332 A CN 201010019332A CN 101715777 B CN101715777 B CN 101715777B
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methyl
thiophanate
phonetic phenol
ethirimol
composition
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CN101715777A (en
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刘鹏
彭述明
冷忠国
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JIANGXI ZHONGXUN AGROCHEMICAL CO., LTD.
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Guangdong Zhongxun Agri Science Corp
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Abstract

The invention discloses a pesticide composition containing ethirimol and thiophanate-methyl. The composition comprises common additives, ethirimol and thiophanate-methyl, wherein the weight-part ratio of ethirimol to thiophanate-methyl is 10:1-1:20, and the weight percentage of the total weight of ethirimol and thiophanate-methyl in the pesticide composition is 10 to 90 percent. The additives are one or more of solvents, emulsifiers, wetting agents, stabilizers, dispersants, thickeners, PH regulators, defoamers, antifreeze and filling agents. The pesticide composition with ethirimol and thiophanate-methyl needs to be used before or at an early stage of the occurrence of diseases. The composition has the preventing-controlling effect obviously improved in comparison with that of single agents, and reduces the use dosage of pesticide so as to reduce the influence of the pesticide on environment as well as drug cost. The composition is particularly used to prevent and control powdery mildew of apple trees.

Description

A kind of composition pesticide and application thereof that contains the phonetic phenol of second and thiophanate-methyl
Technical field
The composition pesticide that the present invention relates to is take the phonetic phenol of second and thiophanate-methyl as active ingredient, is used for preventing and treating the plant disease on agricultural, is particularly useful for preventing and treating apple tree powdery mildew etc.
Background technology
The growth of crop in natural world can not be all always very smooth or success easily with growing, and it can run into invasion and attack and the destruction, particularly fungal disease of various damage by disease and insect etc., its kind is many, cause harm serious, for a long time, chemical control is to prevent and treat the main effective means of disease.Yet, in recent years due to single drug and Scientific Usage of Drugs not, caused many pathogens to produce resistance to the agricultural chemicals of current use, powdery mildew be occur on many important crops general, cause harm seriously, the worldwide disease of more difficult control, bring huge loss to agricultural production.The powdery mildew tender seedling of mainly causing harm is set greatly bud, the tip, tender leaf, also cause harm flower and young fruit.It is this sick principal character that disease section is abound with white powder.Seedling is killed, produces the canescence patch on blade and tender stem, fall ill blade atrophy, curling, browning, withered when serious, and the later stage, the disease minister went out intensive pore.Large tree is killed, and the shrivelled point of bud is thin, and germinate evening spring, and internode is short, and sick leaf is long and narrow, and matter is hard and crisp, rolls up on leaf margin, does not uprightly stretch, and young sprout completely covers white powder.Vegetative period, strong leaf was killed uneven, and chlorophyll is deep or light irregular, and sick leaf shrinkage distortion is even withered.The killed flower of bud is out of shape, petal is long and narrow, atrophy.Young fruit is killed, fruit top generation white powder spot, rear formation rust staining.
At present, domestic medicament be used to preventing and treating powdery mildew mainly contains single dose and the mixture preparations thereof such as thiophanate-methyl, carbendazim, triazolone, Flusilazole, own azoles alcohol, Difenoconazole, alkene oxazolone, kresoxim-methyl, the continuous renewal that the continuous release explanation controlling powdery mildew history of these medicaments is medicine systems is regenerated historical, and the powder mildew resistance problem is more and more serious.Therefore, the research and development of powdery mildew medicament are played positive role to agricultural production.
The phonetic phenol of second (ethirimol) belongs to absorption low toxicity bactericide in miazines, has protection and therapeutic action, can be absorbed rapidly by plant roots, stem, leaf, and run to each position in plant corpus.Be mainly used in preventing and treating crop powdery mildew, to rust, the red spot of beans, the leaf spot of banana etc. also has good control efficiency.
Thiophanate-methyl (tebuconazole) for belonging to benzimidazole, is a kind of broad spectrum activity systemic fungicide, can prevent and treat the various crop disease, has interior suction, preventive and therapeutic action.It is converted into carbendazim in plant corpus, in the mitosis of interference bacterium, the formation of spindle, affect cell division.
Being mixed of different pesticide species is the common methods of the agriculture resistance disease of control.Screening by formulation of pesticide, filter out rational formula, can effectively improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance, is the important means of the disease comprehensive regulation.The inventor is by experimental study, and the discovery phonetic phenol of second and thiophanate-methyl are mixed and have larger synergistic effect, can effectively prevent and treat powdery mildew, after further study, have completed the present invention.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of efficient, low toxicity and the lasting period long, can effectively prevent and treat crop powdery mildew, be conducive to the composition pesticide that contains the phonetic phenol of second and thiophanate-methyl of the powdery mildew comprehensive regulation.
For addressing the above problem, the technical solution adopted in the present invention is: a kind of composition pesticide that contains the phonetic phenol of second and thiophanate-methyl, comprise the phonetic phenol of usual auxiliaries and second and thiophanate-methyl, the ratio of weight and number of the phonetic phenol of second and thiophanate-methyl is 10: 1-1: 20, and the phonetic phenol of second and the percentage by weight of thiophanate-methyl weight summation in composition pesticide are 10-90%.
Preferably, the phonetic phenol of second and the percentage by weight of thiophanate-methyl weight summation in composition pesticide are 30-80%.
Described composition pesticide can according to well known to a person skilled in the art method, be mixed with the application forms of the suitable agricultural uses such as effervescent tablet, oil-suspending agent, wetting powder, water dispersible granules, aqueous suspension agent.
Described composition pesticide also contains the required usual auxiliaries of preparation pesticidal preparations, usual auxiliaries is one or more the mixing in solvent, emulsifier, wetting agent, stabilizing agent, dispersant, thickener, PH conditioning agent, defoamer, antifreezing agent, packing agent etc., be known substance, various auxiliary agents commonly used in pesticidal preparations, can change to some extent according to different situations, be not particularly limited.
Described composition pesticide is used for the control crop powdery mildew.
Described crop is one or more in fruit tree, grape, strawberry, cucumber, wheat.
Early stage or the use of disease initial stage of origination should occur in disease in composition pesticide provided by the invention when using.
Composition pesticide provided by the invention adopts the method for spraying to use usually, also can adopt as required upper other operation techniques used of agricultural.
Composition pesticide provided by the invention has following beneficial effect:
1, composition pesticide provided by the invention shows obvious synergistic effect in certain ratio range, the control efficiency of composition is significantly improved than single dose, has reduced the using dosage of agricultural chemicals, has reduced the impact of agricultural chemicals on environment, has reduced drug cost.
2, the active ingredient mechanism of action of composition pesticide provided by the invention is different, and the application of composition can delay or overcome the generation of disease drug resistance, extends the service life of medicament, is conducive to the comprehensive regulation of disease.The present invention is particularly useful for preventing and treating the apple tree powdery mildew.
Embodiment
In order to understand better essence of the present invention, be described further by following examples, but the present invention is not limited to these embodiment.In these embodiments, unless otherwise indicated, all percentages all are weight percentage.
FORMULATION EXAMPLE 1 (the 66% phonetic phenol thiophanate-methyl of second effervescent tablet)
The phonetic phenol 60% of second
Thiophanate-methyl 6%
Sodium butylnaphthalenesulfonate (dispersant) 5%
Calcium dodecyl benzene sulfonate (wetting agent) 3%
Polyvinyl alcohol (thickener) 3%
Sodium bicarbonate (gas-producing disintegrant) 10%
Anhydrous citric acid (gas-producing disintegrant) 5%
Microcrystalline cellulose (dry binder) is supplemented to 100%
Above-mentioned formula Central Plains medicine, auxiliary agent are crushed to certain fineness through cracker; Make the 15% phonetic phenol thiophanate-methyl of second effervescent tablet after the tablet press machine compressing tablet.
This embodiment is used for preventing and treating powdery mildew of cucumber, and the 66% phonetic phenol thiophanate-methyl of second effervescent tablet is watered 2500 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 90.4%, 93.1%.
The single dose 25% phonetic phenol suspending agent of second is watered 1000 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 83.2%, 85.6%.
Single dose 70% thiophanate-methyl wetting powder is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 71.6%, 80.9%.
The 66% phonetic phenol thiophanate-methyl of second effervescent tablet is prevented and treated the powdery mildew of cucumber successful and is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
FORMULATION EXAMPLE 2 (the 60% phonetic phenol thiophanate-methyl of second oil-suspending agent)
The phonetic phenol 50% of second
Thiophanate-methyl 10%
Fatty alcohol-polyoxyethylene ether (emulsifier) 4%
Sodium metnylene bis-naphthalene sulfonate (dispersant) 5%
Triphenyl vinyl phenol polyoxyethylene poly-oxygen propylene aether (wetting agent) 3%
Epoxidized soybean oil (defoamer) 1%
Glycerine (antifreezing agent) 0.5%
Methylated vegetable oil (carrier) is supplemented to 100%
Above-mentioned formula is added in mixing kettle in proportion successively, namely make the 60% phonetic phenol thiophanate-methyl of second oil-suspending agent after stirring.
This embodiment is used for the control wheat powdery mildew, and the 60% phonetic phenol thiophanate-methyl of second oil-suspending agent is watered 2500 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 87.3%, 96.4%.
The single dose 25% phonetic phenol suspending agent of second is watered 1000 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 81.7%, 84.5%.
Single dose 70% thiophanate-methyl wetting powder is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 78.2%, 80.1%.
The 60% phonetic phenol thiophanate-methyl of second oil-suspending agent control wheat powdery mildew successful is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
FORMULATION EXAMPLE 3 (the 70% phonetic phenol thiophanate-methyl of second wetting powder)
The phonetic phenol 20% of second
Thiophanate-methyl 50%
Sodium butylnaphthalenesulfonate (wetting agent) 3%
Naphthalenesulfonate formaldehyde condensation compound (dispersant) 10%
White carbon (filler) 5%
Kaolin (filler) is supplemented to 100%.
Above-mentioned formula is entered in blender after coarse crushing in proportion mix, more namely make the 70% phonetic phenol thiophanate-methyl of second wetting powder after air-flow crushing.
This embodiment is used for control apple tree powdery mildew, and the 70% wettable mealiness agent of the phonetic phenol thiophanate-methyl of second is watered 1000 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 94.1%, 95.2%.
The single dose 25% phonetic phenol suspending agent of second is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 80.2%, 86.6%.
Single dose 70% thiophanate-methyl wettable powder disease is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 84.3%, 86.0%.
The 70% phonetic phenol thiophanate-methyl of second wetting powder control apple tree powdery mildew successful is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
FORMULATION EXAMPLE 4 (the 66% phonetic phenol thiophanate-methyl of second water dispersible granules)
The phonetic phenol 6% of second
Thiophanate-methyl 60%
Lauryl sodium sulfate (wetting agent) 6%
Polycarboxylate (dispersant) 8%
Sodium chloride (disintegrant) 2%
Polyethylene glycol (binding agent) 3%
Soluble starch (stabilizing agent) 3%
Bentonite (filler) is supplemented to 100%.
Dry pulverization process, granulation, drying, screening make the 30% phonetic phenol Thiophthanate methyl water dispersible granular agent of second in proportion with above-mentioned formula.
This embodiment is used for the control powdery mildew of strawberry, and the 66% phonetic phenol thiophanate-methyl of second water dispersible granules is watered 1000 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 86.7%, 90.3%.
The single dose 25% phonetic phenol suspending agent of second is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 79.1%, 82.1%.
Single dose 70% thiophanate-methyl wetting powder is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 68.6%, 72.0%.
The 66% phonetic phenol thiophanate-methyl of second water dispersible granules control powdery mildew of strawberry successful is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
FORMULATION EXAMPLE 5 (the 64% phonetic phenol thiophanate-methyl of second wetting powder)
The phonetic phenol 4% of second
Thiophanate-methyl 60%
Sodium butylnaphthalenesulfonate (wetting agent) 3%
Naphthalenesulfonate formaldehyde condensation compound (dispersant) 10%
White carbon (filler) 10%
Kaolin (filler) is supplemented to 100%
Above-mentioned formula is entered in blender after coarse crushing in proportion mix, more namely make the 24% phonetic phenol thiophanate-methyl of second wetting powder after air-flow crushing.
This embodiment is used for the control grape powdery mildew, and the 64% wettable mealiness agent of the phonetic phenol thiophanate-methyl of second is watered 1000 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 96.0%, 97.8%.
The single dose 25% phonetic phenol suspending agent of second is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 88.0%, 88.2%.
Single dose 70% thiophanate-methyl wettable powder disease is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 65.1%, 70.6%.
The 64% phonetic phenol thiophanate-methyl of second wetting powder control grape powdery mildew successful is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
FORMULATION EXAMPLE 6 (the 63% phonetic phenol thiophanate-methyl of second aqueous suspension agent)
The phonetic phenol 3% of second
Thiophanate-methyl 60%
Triphenyl vinyl phenol polyoxyethylene poly-oxygen propylene aether (emulsifier) 12%
Calcium dodecyl benzene sulfonate (wetting agent) 5%
Alkylphenol polyoxyethylene formaldehyde condensation products sulphate (dispersant) 3%
Ethylene glycol (antifreezing agent) 0.2%
Xanthan gum (stabilizing agent) 0.1%
Organosilicon (defoamer) 0.4%
Gum Arabic (thickener) 2%
Deionized water (medium) is supplemented to 100%
Above-mentioned formula is pulverized in proportion in advance, then added in sand mill and grind, allotment making the 63% phonetic phenol thiophanate-methyl of second aqueous suspension agent after high shear mixing.
This embodiment is used for control pear tree powdery mildew, and the 63% phonetic phenol thiophanate-methyl of second aqueous suspension agent is watered 1200 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 90.9%, 93.5%.
The single dose 25% phonetic phenol aqueous suspension agent of second is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 73.5%, 78.4%.
Single dose 70% thiophanate-methyl wetting powder is watered 800 times of sprayings of dilution, and after medicine, the preventive effect of 7 days, 15 days is respectively 84.1%, 86.9%.
The 63% phonetic phenol thiophanate-methyl of second aqueous suspension agent control pear tree powdery mildew successful is better than the 25% phonetic phenol suspending agent of second and 70% thiophanate-methyl wetting powder, illustrate that the phonetic phenol of second of the present invention and thiophanate-methyl composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, delay the generation of disease drug resistance.
Biological activity determination embodiment: the phonetic phenol of second and thiophanate-methyl are mixed the apple mildew bacterium are screened
Be mixed to the co-toxicity of germ for further understanding the phonetic phenol of second and thiophanate-methyl, the inventor is mixed to the phonetic phenol of second and thiophanate-methyl and has carried out a large amount of formulation screening tests.
to be mixed etc. for the examination 95.5% former medicine of the phonetic phenol of second and 98% thiophanate methyl raw pesticide and 6 phonetic phenol of second and thiophanate-methyl, (6 phonetic phenol of second and thiophanate-methyl mixed ratio are respectively 8 medicaments: the 10% phonetic phenol of second+60% thiophanate-methyl, the 20% phonetic phenol of second+50% thiophanate-methyl, the 30% phonetic phenol of second+40% thiophanate-methyl, the 40% phonetic phenol of second+30% thiophanate-methyl, the 50% phonetic phenol of second+20% thiophanate-methyl, the 60% phonetic phenol of second+10% thiophanate-methyl), add in the sterilization triangular flask that has added in advance 2ml ethanol, fully vibration makes its dissolving, then add sterile water to 600ml, make each 600ml of 100ug/ml test mother liquor standby.On the basis of preliminary experiment, the mother liquor for preparing is diluted to 5 concentration gradients by concentration is high by low respectively, be followed successively by 100ug/g, 50ug/g, 25ug/g, 12.5ug/g, 6.25ug/g.Adopt field apple tree cauline leaf spray-on process dispenser, every 10 days spray medicines once, connect and spray 2 times.20 blades of a uniform annotinous branch of morbidity, 3 repetitions are selected in each processing.After the 2nd spray medicine 14 days, each at different levels sick number of sheets of processing of investigation respectively.
Sick leaf grade scales at different levels:
0 grade: without scab;
1 grade: lesion area accounts for below 5% of whole leaf area;
3 grades: lesion area accounts for 6%~15% of whole leaf area;
5 grades: lesion area accounts for 16%~25% of whole leaf area;
7 grades: lesion area accounts for 26%~50% of whole leaf area;
9 grades: lesion area accounts for more than 50% of whole leaf area.
According to survey data, calculate disease index and control efficiency that each is processed, computing formula is as follows:
Figure G2010100193326D00081
Figure G2010100193326D00091
Figure G2010100193326D00092
When carrying out the medicament joint toxicity measuring, this test adopts the Wadley method to calculate the coefficient of synergism (SR) of mixture, estimates the synergy type of mixture.
The Wadley method: estimate the mixed synergistic effect of mixture according to coefficient of synergism (SR), namely SR<0.5 is antagonism, and 0.5≤SR≤1.5 are summation action, and SR>1.5 are synergy.Coefficient of synergism (SR) by formula (1), (2) calculates:
X 1 = P A + P B P A / A + P B / B × 100 . . . . . . . . . . . . . . ( 1 )
In formula:
X1 ... mixture EC 50Theoretical value, unit is mg/litre (mg/L);
P AThe percentage composition of A in mixture, unit are percentage (%);
P BThe percentage composition of B in mixture, unit are percentage (%);
A ... the EC of A in mixture 50Value, unit is mg/litre (mg/L);
B ... the EC of B in mixture 50Value, unit is mg/litre (mg/L).
SR = X 1 X 2 . . . . . . . . . . . . . ( 2 )
In formula:
SR ... the coefficient of synergism of mixture;
X1 ... mixture EC 50Theoretical value, unit is mg/litre (mg/L);
X2 ... mixture EC 50Measured value, unit are mg/litre (mg/L).
Record the former medicine of the phonetic phenol of second and thiophanate methyl raw pesticide and both in 6 the different blended combo close inhibition to the apple mildew bacterium, then take the logarithm value (X) of drug concentration as independent variable, take the probit value (Y) of inhibiting rate as dependent variable, adopt method of least squares to obtain virulence regression equation and the EC of each medicament 50And correlation coefficient r value.Press Wadley method (1945,1967) and obtain each combination synergism value SR (seeing attached list 1) that is mixed.
Result shows, the co-toxicity that 6 different blended combos are closed inhibition to apple mildew all has in various degree increase, the phonetic phenol of second and thiophanate-methyl to be mixed to germ shows as synergistic effect.Therefore, the inventor thinks that it is scientific and reasonable that the phonetic phenol of second and thiophanate-methyl are mixed.
Table 1, the phonetic phenol of second and thiophanate-methyl and the different proportioning toxicity test result to the apple tree powdery mildew
Reagent agent Virulence regression equation y=a+bx The r value EC 50(mg/L) The SR value
The former medicine of the phonetic phenol of 95.5% second 3.7550+1.3218x 0.9995 8.45 -
98% thiophanate methyl raw pesticide 3.9085+1.0712x 0.9989 10.44 -
The phonetic phenol of 10% second+60% thiophanate-methyl 3.8643+1.2673x 0.9985 7.87 1.58
The phonetic phenol of 20% second+50% thiophanate-methyl 3.9520+1.3036x 0.9839 6.37 1.53
The phonetic phenol of 30% second+40% thiophanate-methyl 3.8410+1.2353x 0.9858 8.67 1.09
The phonetic phenol of 40% second+30% thiophanate-methyl 3.9966+1.1251x 0.9986 7.79 1.18
The phonetic phenol of 50% second+20% thiophanate-methyl 3.7406+1.3234x 0.9957 8.95 1.50
The phonetic phenol of 60% second+10% thiophanate-methyl 3.9706+1.2175x 0.9976 8.21 1.02

Claims (2)

1. composition pesticide that contains the phonetic phenol of second and thiophanate-methyl, comprise usual auxiliaries, the phonetic phenol of second and thiophanate-methyl, it is characterized in that percentage by weight is the phonetic phenol 6% of second, thiophanate-methyl 60%, lauryl sodium sulfate 6%, polycarboxylate 8%, sodium chloride 2%, polyethylene glycol 3%, soluble starch 3%, bentonite is supplemented to 100%, makes the phonetic phenol Thiophthanate methyl water dispersible granular agent of second.
2. the composition pesticide that contains the phonetic phenol of second and thiophanate-methyl according to claim 1, is characterized in that for control strawberry crop powdery mildew.
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