CN103109815B - Dimoxystrobin and azoxystrobin pesticide composition - Google Patents

Abstract

The present invention relates to a kind of dimoxystrobin and azoxystrobin pesticide composition, dimoxystrobin and Fluoxastrobin ratio of quality and the number of copies is in the composition 1:3 ~ 5:1.Composition pesticide of the present invention has good control efficiency to rice sheath blight disease.Indoor Rhizoctonia solani Kuhn measures, and the highest bacteriostasis rate reaches 90.3%, and the minimum preventive effect of field trial reaches 80.7%, has very significant prevention and control effect to rice sheath blight disease.Formulation is various, and selectivity is strong, uses simple, has extremely strong operability and actual application value.

Description

Dimoxystrobin and azoxystrobin pesticide composition

Technical field

The present invention relates to a kind of disinfectant use in agriculture, this disinfectant use in agriculture active ingredient comprises dimoxystrobin and Fluoxastrobin.

Background technology

Dimoxystrobin, English name: dimoxystrobinpestanal, belongs to methoxy acrylic bactericide, is mainly used in control rice blast and banded sclerotial blight at present.

Fluoxastrobin, English name: Azoxystrobin, belong to methoxy acrylate (Strobilurin) series bactericidal agent, high-efficiency broad spectrum, all has good activity to nearly all mycota (Ascomycotina, Basidiomycotina, Mastigomycotina and Deuteromycotina) disease such as powdery mildew, rust, glume blight, net blotch, downy mildew, rice blast etc.Can be used for cauline leaf spraying, seed treatment, also can carry out soil treatment, be mainly used in cereal, paddy rice, peanut, grape, potato, fruit tree, vegetables, coffee, lawn etc.

Rice sheath blight disease, also known as moire disease, popular name spends sufficient stalk, rotten pin pest, features spot.Be infected by Rhizoctonia solani Kuhn to fall ill, how occur under high temperature, super-humid conditions.Banded sclerotial blight causes harm seriously in South Rice Region of China, is one of Major Diseases in current Rice Production.This disease makes paddy rice not ear, or the not plump paddy of heading is more, and grain heavily declines.Leaf sheath is caught an illness and is produced dirty-green water soaking mode edge blurry stigma, the large ovalize of rear flaring or moire shape at approximately level place, and middle part be grayish green or taupe, is yellowish or canescence in the middle part of when humidity is low, and middle part disorganization is translucent shape, and edge is dun.When falling ill serious, several scab merges and forms large scab, in irregular moire spot, often causes yellow leaf withered.Blade catches an illness scab also in moire shape, and edge takes off Huang, and during rapid onset, scab is in dirty green, and blade rots very soon, and stem stalk damage symptoms is like blade, and the later stage is yellowish-brown, easy to break.Fringe neck is injured just for dirty green, and rear change ash is brown, and Chang Buneng is eared, and the not plump paddy of heading is more.During high humidity, sick minister goes out white netted mycelia, after pool white hypha group, formed sclerotium, sclerotium dark brown, easily comes off.Under hot conditions, scab produces load and the basidiospore of one deck white mould layer of powder and germ.In factual survey research, we find, dimoxystrobin, Fluoxastrobin are carried out composite, obviously preventive and therapeutic effect is had to rice sheath blight disease, according to long-term tracking test, this complex agent type, be difficult to produce resistance in actual application, and in use, consumption is very low, very little to the negative effect of environment.

Summary of the invention

The object of the invention is dimoxystrobins different for the mechanism of action and Fluoxastrobin to carry out composite, provide a kind of composition pesticide of efficient, low toxicity, low-residual, for the water prevention rice sheath blight.

Technical scheme of the present invention: a kind of composition pesticide containing dimoxystrobin and Fluoxastrobin, dimoxystrobin and the Fluoxastrobin ratio of quality and the number of copies in composition pesticide is 3:1 ~ 1:5, and all the other are allow in agricultural chemicals to use and acceptable auxiliary element.

Composition pesticide of the present invention is prepared into any one formulation being applicable to agriculturally using by known method, reasonable formulation has suspending agent, microemulsion and missible oil.

The auxiliary element used in the present composition comprises solvent, emulsifier, wetting agent, stabilizing agent, dispersant, thickener, pH adjusting agent, defoamer, antifreezing agent, packing agent etc., and to be of value to active ingredient stable and play the known substance of drug effect in the formulation, be all various compositions that are conventional in pesticidal preparations or permission use, concrete composition and consumption are determined by test according to recipe requirements.

The frequency of administration of the present composition and amount of application change with crops, insect, weather condition and have small variations, can by the object using suitable dosage reach control.

Compared with prior art, the invention has the advantages that.

1, composite have obvious synergistic function, is used alone improves control efficiency than single dose.

2, double action mechanism, delays the generation of disease drug resistance.

3, two kinds of active ingredients are composite, reduce Pesticide use amount, reduce use cost and the pollution to environment.

Embodiment

Be described in further detail content of the present invention below in conjunction with embodiment, content mentioned in embodiment is not limitation of the invention, and material prescription is selected to suit measures to local conditions and on result without substantial impact.In these embodiments, unless otherwise indicated, all percentage is all weight percentage.

preparation method's embodiment one: 18% dimoxystrobin Fluoxastrobin missible oil:

Take 6% dimoxystrobin, 12% Fluoxastrobin, 4% agriculture breast 500#(calcium dodecyl benzene sulfonate), 3%Span-60#(sorbitan monostearate), 3% agriculture breast 2201#, 2% triphenyl phosphite, dimethylbenzene mends 100%.Fully dissolve after above-mentioned raw materials mixing, the obtained 18% dimoxystrobin Fluoxastrobin missible oil of mixing.

preparation method's embodiment two: 24% dimoxystrobin Fluoxastrobin suspending agent:

Take 4% dimoxystrobin, 20% Fluoxastrobin, 3% agriculture breast 600,3% agriculture breast 2201,3% lignosulfonates, 0.2% xanthans, 6% ethylene glycol, 0.5% silicone defoaming agent, add deionized water and mend to 100%.After above-mentioned raw materials is mixed, through the obtained 24% dimoxystrobin Fluoxastrobin suspending agent of high speed shear emulsification.

preparation method's embodiment three: 12% dimoxystrobin azoxystrobin microemulsion:

Take 3% dimoxystrobin, 9% Fluoxastrobin, 6% emulsifier as agriculture breast 500#(calcium dodecyl benzene sulfonate), 2% agriculture breast 2201#, 3% agriculture breast 600#, 1% methyl alcohol, 6% dimethylbenzene, 1.2% epoxychloropropane, 0.4% aceticanhydride, deionized water mend to 100%, above-mentioned raw materials fully dissolved the obtained 12% dimoxystrobin azoxystrobin microemulsion of mixing.

assays Example one: to the indoor colony growth inhibition test of rice sheath blight disease.

Test method is carried out with reference to Wu Wenjun " chemical protection of plant experimental technique introduction " (1993).The dimoxystrobin of 95%, the former medicine of 95.4% Fluoxastrobin are made 1.0 μ g/mL mother liquors with acetone, Tween-80 respectively, utilize that mother liquor becomes Fluoxastrobin, dimoxystrobin mass ratio is respectively 3:1 ~ 5:1, gradient be respectively 0.01 μ g/mL, 0.02 μ g/mL, 0.04 μ g/mL, 0.08 μ g/mL PDA dull and stereotyped.The concrete data of result of the test are in table 1.

Table 1, Fluoxastrobin, dimoxystrobin indoor antibacterial test data.

Calculate the toxicity index of each medicament and the co-toxicity coefficient (CTC value) of mixture according to the abundant method of Sun Yun, when CTC≤80 are antagonism, 80 ﹤ CTC ﹤ 120 are summation action, and CTC >=120 are synergistic effect.

Found by indoor bacterium colony Developing restraint test, Fluoxastrobin, dimoxystrobin long all have synergy inhibitory action according to composite rear to be born to Rhizoctonia solani Kuhn of the mass ratio of 3:1 ~ 5:1, wherein obvious with dimoxystrobin, Fluoxastrobin 1:2 synergy, co-toxicity coefficient is 234.57, the two compound synergic is remarkable, more effectively can suppress the expansion of bacterium colony.

assays Example two:the field control effectiveness test of the water prevention rice sheath blight.

Reagent agent and dispenser dosage: (1) 24% dimoxystrobin Fluoxastrobin suspending agent (preparation method's embodiment two), mu 40 grams, preparation; (2) 12% dimoxystrobin azoxystrobin microemulsion (preparation method's embodiment three), mu 80 grams, preparation.

Contrast medicament and dispenser dosage: (1) 20% dimoxystrobin wetting powder, mu 50 grams, preparation

(2) 10% Fluoxastrobin wetting powders, mu 25 grams, preparation,

Spraying time and application method: the dispenser of rice sheath blight disease their early stage, is watered even spraying.

The field control effectiveness test result of table 2, the water prevention rice sheath blight.

Result of the test: in table 2.As can be seen from the test results: after dispenser 7 days, dimoxystrobin of the present invention and Fluoxastrobin mixture composition to rice sheath blight disease preventive effect all more than 70%, significantly better than the single dose of contrast; After dispenser 14 days, dimoxystrobin of the present invention and Fluoxastrobin mixture composition to rice sheath blight disease preventive effect all more than 80%, also significantly better than the single dose of contrast; In process of the test, each medicament is showed no poisoning generation, to crop safety.Illustrate that dimoxystrobin of the present invention and Fluoxastrobin mixture composition are better than single dose, improve actual control efficiency, reduce dosage, reduce costs, reduce medicament to the adverse effect of environment, delay the generation of disease drug resistance, agricultural synthesis is administered and has great significance.

Claims (2)

1. dimoxystrobin and an azoxystrobin pesticide composition, is characterized in that: active ingredient is made up of dimoxystrobin and Fluoxastrobin, and dimoxystrobin and Fluoxastrobin ratio of quality and the number of copies is in the composition 1:3 ~ 5:1.

2. a dimoxystrobin according to claim 1 and the application of azoxystrobin pesticide composition in the water prevention rice sheath blight.