A kind of granular pesticide containing probenazole and thiram
Technical field
The present invention relates to technical field of pesticide, more particularly to a kind of granular pesticide containing probenazole and thiram.
Background technology
Probenazole, English are general entitled:Probenazole is that Japanese Meiji Seika Kaisha, Ltd. develops
A kind of inducing immunity fungicide by the way that plant is excited to realize protection effect to immune (resistance) reaction of disease in itself, leads to
Plant root absorption is crossed, and relatively rapidly infiltration is conducted to plant each section.Rice is handled by probenazole, can be promoted
Root system absorbs, and relatively quickly infiltration conduction is to plant each section, and cover crop is not by Pyricularia oryzae and rhizoctonia solani
It infects.
Thiram, English common name:Thiram, chemical name:Tetramethyl thiuram disulfide.It is a kind of protective effect
Fungicide, has a broad antifungal spectrum mainly for the treatment of seed and soil, stands the seedling stage of Cereal smut and various crop withered
Disease has preferable control effect.
The raising rice seedlings in China realize the seedling raising method from based on watery ricenursery to based on dry rice seedling substantially at present, and rice shoot is sick
Evil is still watered spray-on process with medicament and is prevented, more time-consuming.In the case of rural labour's shortage, effort-saving is prevented curing the disease
The method of insect pest is more and more concerned, and the present invention is compounded by active ingredient probenazole and thiram, is prepared into pesticide
Granula, uptake and translocation is good, and in seedling operation or seeding stage is applied, and can effectively be prevented seedling blight, be reached time saving province
The effect of work.
At present, the research of probenazole and thiram mixture be there are no into relevant report.
Invention content
The technical problem to be solved by the present invention is to provide a kind of granular pesticide containing probenazole and thiram, use
In the prevention of dry rice seedling phase rice damping-off, formula synergy is notable, and absorbability is good, can effectively control disease, has time saving province
Work labour-saving effect.
The technical solution adopted by the present invention is that:A kind of granular pesticide containing probenazole and thiram, active ingredient
It is made of probenazole and thiram, the weight ratio of wherein probenazole and thiram is:5-8:2-5, it is preferred that allyl
The weight ratio of benzene thiazole and thiram is 7:3.
Weight percent of the probenazole in granular pesticide is 5-8%, and thiram is in granular pesticide
In weight percent be 2-5%.
The adjuvant that the granular pesticide of the present invention adds in includes filler, binding agent, dispersant, wetting agent, disintegrant,
Toner, stabilizer or it is other be beneficial to active ingredient in the formulation stablize and drug effect play substance, be all field of pesticide preparation
In commonly use or allow the various composition used.
The present invention has the following advantages and significant technique effect:
(1) probenazole and thiram have double action mechanism, and mutual mixture germ is not easy to produce resistance.
(2) indoor biometrics the result shows that, probenazole and thiram according to a certain percentage mixture to rhizoctonia solani synergy
Significantly, it advantageously reduces applications of pesticide amount and reduces pesticide cost.
(3) present invention is prepared into granular pesticide, is applied during with reference to dry rice seedling operation or during seedling, alleviates farming behaviour
Make, be conducive to save labour cost.
Specific embodiment
Technical scheme of the present invention and advantageous effect are described further with reference to embodiments, of the present invention hundred
Ratio is divided to be weight percentage.
First, embodiment is prepared
Embodiment 1:(active ingredient is than 5 for 7% probenazole thiram granule:2)
Formula:Weigh probenazole 5% by weight, thiram 2%, naphthalenesulfonate formaldehyde condensation compound 2.5%, 12
Sodium alkyl sulfate 3%, polyvinyl alcohol 3.5%, bentonite complements to 100%.
Embodiment 2:(active ingredient is than 6 for 8% probenazole thiram granule:2)
Formula:Probenazole 6%, thiram 2%, naphthalenesulfonate formaldehyde condensation compound 5%, dodecane are weighed by weight
Base sodium sulphate 4.5%, polyvinyl alcohol 3%, attapulgite 15%, kaolin complements to 100%.
Embodiment 3:(active ingredient is than 7 for 10% probenazole thiram granule:3)
Formula:Probenazole 7%, thiram 3%, lauryl sodium sulfate 2.5%, carboxymethyl fibre are weighed by weight
Dimension element 3.5%, diatomite 15%, bentonite complements to 100%.
Embodiment 4:(active ingredient is than 8 for 10% probenazole thiram granule:2)
Formula:Probenazole 8%, thiram 2%, naphthalenesulfonate formaldehyde condensation compound 5%, dodecane are weighed by weight
Base sodium sulphate 2.5%, polyvinyl alcohol 5%, kaolin complements to 100%.
Preparation method:Recipe ingredient described in above-described embodiment 1-4 is uniformly mixed, is crushed, water is added fully to be stirred after soaking
It mixes uniformly, then is granulated with screw extruder pelletizer, is sieved after dry up to the granule of thiram containing probenazole.
2nd, BIOLOGICAL ACTIVITY EXAMPLES
The BIOLOGICAL ACTIVITY EXAMPLES of the present invention is divided into the experiment of indoor biometrics toxicity test and field medicine effect test.
Embodiment 1:Probenazole, thiram and compounding agent are to the Toxicity Determination of damping-off
After prerun determines the effective inhibition concentration range of each medicament, by probenazole, thiram and its mixed agent by having
Effective component content gradient series dilute 5 concentration, if clear water compares.Reference《Farm-chemical indoor determination test rule fungicide》
It carries out, virulence of the medicament to rice rice damping-off is measured using mycelial growth rate method.After 72h bacterium colony is measured with crossing method
Diameter calculates each processing net growth, mycelial growth inhibition rate.
Mycelial growth inhibition rate is converted into probit value (y), liquor strength (μ g/mL) is converted into logarithm (x), with minimum
Square law acquires virulence regression equation (y=a+bx), and thus calculates the EC of each medicament50Value.
The synergistic effect of pharmacy mix is evaluated according to the co-toxicity coefficient method (CTC) of the abundant methods of Sun Yun, i.e. CTC≤80 are antagonism
Effect, 80<CTC<120 be summation action, and CTC >=120 are synergistic effect.Statistical result is as shown in table 1:
Reagent agent |
Proportioning |
EC50(mg/L) |
Co-toxicity coefficient (CTC) |
Probenazole (A) |
/ |
1.35 |
/ |
Thiram (B) |
/ |
2.73 |
/ |
A:B |
5:2 |
1.26 |
125.6 |
A:B |
5:3 |
1.21 |
138.0 |
A:B |
6:2 |
1.15 |
134.8 |
A:B |
6:5 |
1.24 |
141.2 |
A:B |
7:3 |
0.96 |
165.4 |
A:B |
7:4 |
1.21 |
137.0 |
A:B |
8:2 |
1.18 |
127.7 |
A:B |
8:5 |
1.26 |
133.1 |
A:B |
1:10 |
3.34 |
75.7 |
Measurement result shows that when the proportioning of probenazole and thiram be 5-8:During 2-5, co-toxicity coefficient (CTC) is more than
120, synergistic effect is apparent.
Embodiment 2:The preparation for preparing 3 gained of embodiment is used to prevent the field control effectiveness test of rice shoot damping-off
(1) experimental design:By 10% probenazole thiram (7:3) granule is as test group 1#, amount of application
0.1 kilogram/m2;Using 8% probenazole granule as control group 1#, amount of application is 0.2 kilogram/m2;With 10% thiram particle
Agent is control group 2#, and amount of application is 0.25 kilogram/m2, 1 blank control group is set.
(2) application method
Disease-free seedling plot is selected, the soil with rhizoctonia solani is uniformly mixed, is layered on successively i.e. by smooth seedling furrow
It will test on seedling furrow, it is desired to which the thickness of soil in spite of illness on furrow is consistent.The seed-grain for having urged bud is planted in soil, in experiment
Each 3 repetitions of processing, plot area 1m2, by experimental design by test group 1#, control group 1#, control group 2# correspondence medicament
And dosage is uniformly imposed in corresponding cell, keeps seedbed environment consistent in each cell.
(3) result of the test
It 12 days after medicine, is investigated with reference to rice shoot damping-off high-incidence season result, incidence and control effect is calculated, through statistical
Analysis, test group 1# are 87.53% to the control effect of rice shoot damping-off, and control group 1# is to the control effect of rice shoot damping-off
73.24%;Control group 2# is 68.52% to the control effect of rice shoot damping-off.Find out from experiment, probenazole is beautiful with good fortune
After double rational mixtures, mixed agent is apparent to rice shoot damping-off synergy, has not only reduced the usage amount of active ingredient, but also show and be better than
The field efficacy of single dose helps to reduce Pesticide use cost.