CN107251921A - A kind of bactericide for treating bacterial blight of rice - Google Patents
A kind of bactericide for treating bacterial blight of rice Download PDFInfo
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- A—HUMAN NECESSITIES
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/36—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
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- A01N37/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/50—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids the nitrogen atom being doubly bound to the carbon skeleton
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- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/12—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom not containing sulfur-to-oxygen bonds, e.g. polysulfides
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/40—Liliopsida [monocotyledons]
- A01N65/48—Zingiberaceae [Ginger family], e.g. ginger or galangal
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Abstract
The invention discloses a kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：23 parts of trifloxystrobin, 20 30 parts of Chinese medical extract, 0.5 1 parts of gaultherolin, 0.5 0.7 parts of diethyl aminoethyl hexanoate, 13 parts of bleeding agent, 10 15 parts of dispersant, 8 10 parts of auxiliary agent, 100 200 parts of water；Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil.Present invention collective effect in terms of enhancing paddy rice self resistance and outside sterilization two so that the present invention has the effect of good treatment bacterial blight of rice, and will not produce drug resistance.
Description
Technical field
The present invention relates to bactericide technical field, more particularly to a kind of bactericide for treating bacterial blight of rice.
Background technology
Bacterial blight of rice is a kind of bacteriosis of paddy rice leaf portion.Pathogen is the Xanthomonas oryzae rice of Prokaryota
Pvs oryzae and oryzicola.Germ invades rice body from root, stem, the wound of leaf portion or water hole, and harm is bred in the conduit of vascular bundle.Seedling stage and
Tillering stage is most vulnerable.Leaf withered symptom is showed rice shoot blade more.
It is in infection kind acute wilting symptoms occur more, the water stain shape of scab cinerous, sick leaf crimp rapidly it is wilting, anti-
Brown withered spot is produced in sick kind.26-30 DEG C of the development thermophilic of germ, survives the winter on invalid body, and seed rice can also carry disease germs, through wind and rain
Propagate.Nitrogenous fertilizer is excessive and low-lying ponding field is fallen ill early and weighed.After Heavy Rain of Typhoon, disease often spreads rapidly in susceptible variety.
At present, commonly use chemical agent or antibiotic carries out disease control, but chemical agent and antibiotic are easily by cyclization
Border is polluted and medicament residue, influence environment and food security, and bacterium easily produces drug resistance, reduces drug effect.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of bactericide for treating bacterial blight of rice,
Present invention collective effect in terms of enhancing paddy rice self resistance and outside sterilization two so that the present invention has good treatment water
The effect of the bacterial blight of rice, and drug resistance will not be produced.
The present invention proposes a kind of bactericide for treating bacterial blight of rice, and its raw material includes by weight：Trifloxystrobin 2-3
Part, 20-30 parts of Chinese medical extract, 0.5-1 parts of gaultherolin, 0.5-0.7 parts of diethyl aminoethyl hexanoate, 1-3 parts of bleeding agent, dispersant 10-
15 parts, 8-10 parts of auxiliary agent, 100-200 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil.
Small lamb's-quarters, is annual herb plant, and early spring sprouts, month at florescence 4-6, fruiting period 5-7 months.Tender seedling is edible.Herb
It is used as medicine, sweet, hardship is cool in nature.Energy clearing damp, it is clearing heat and detoxicating.For sore swollen toxin, mange itch.Small lamb's-quarters contain anti-bacteria and anti-virus into
Point.
Galangal, alias is wind ginger, small galingal, the cool ginger of cream, galingal, rough ginger, Buddha's hand root, current chart ginger, high cool ginger etc., is ginger
The dry rhizome of section's plant galangal.It is pungent, property heat；Return stomach, the spleen channel.Can warming spleen and stomach for dispelling cold；Regulating qi-flowing for relieving pain.Cure mainly coldness and pain in the epigastrium；
Vomiting；Gas.Galangal has antibacterial action.
Chinese ephedra, alias is color channel fiber crops, Long Sha, inferior phase, inferior salt, dog bone etc., is Ephedraceae plant ephedra sinica, epheday intermedia or wood
The herbaceous stem stem of crafty Chinese ephedra.Pungent, hardship, it is warm-natured；Return lung, bladder warp.Energy sweating cold dispelling, freeings lung and relieving asthma, inducing diuresis for removing edema.For chill
Flu, uncomfortable in chest to breath with cough, geomantic omen edema；Bronchial astehma.Herba ephedrae moistens the lung and relieve the cough.It is used for table disease to have solved, asthma and cough.Chinese ephedra
Effect with anti-bacteria and anti-virus.
Grass-leaved sweetflag, alias be grassleaf sweetflag leaf, mountain calamus, water sword grass, white flag, medicine calamus, prosperous, calamus, prosperous positive, prosperous sheep
Deng being the dry rhizome of acorus gramineus araceae plant.It is pungent, it is warm-natured；Return stomach, the heart channel of Hang-Shaoyin.Energy dampness elimination appetizing, slit phlegm of having one's ideas straightened out is waken up
Refreshing intelligence development.For gastral cavity ruffian is not hungry, apnea, coma epilepsy, forgetfulness and deafness.Chinese ephedra has antibacterial action.
Garlic oil, is obtained by the bulb of liliaceous plant garlic through steam distillation.With the effect of antibacterial anti-mildew.
Caryophyllus oil, refines for Myrtaceae Eugenia cloves.It is pungent, sweet, property heat；Enter stomach, spleen, kidney channel.Can be warm
Stomach, warm kidney.For the swollen, hiccup of stomach cold pain, vomiting and diarrhoea, numbness pain, colic, halitosis, toothache.Caryophyllus oil has antibacterial action.
Preferably, its raw material includes by weight：2.2-2.8 parts of trifloxystrobin, 22-28 parts of Chinese medical extract, salicylic acid first
0.6-0.8 parts of ester, 0.55-0.65 parts of diethyl aminoethyl hexanoate, 1.5-2.5 parts of bleeding agent, 11-13 parts of dispersant, 8.5-9.5 parts of auxiliary agent, water
130-170 parts.
Preferably, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 15-20：5-7：8-10：
10-12：1-3：1-3.
Preferably, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 17-19：5.5-6.5：
8.5-9.5：10.5-11.5：1.5-2.5：1.5-2.5.
Preferably, in the preparation process of Chinese medical extract, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and be uniformly mixed so as to obtain
Mixture；Extracted successively with ethanol, acetone reflux, 3-5h is extracted every time, merged leaching liquor, be concentrated under reduced pressure, be dried to obtain centre
Material；Intermediate material and garlic oil, caryophyllus oil are uniformly mixed so as to obtain Chinese medical extract, mixture, ethanol, the weight ratio of acetone are 1：
15-20：20-25.
Preferably, bleeding agent is azone, menthol and ethyl oleate.
Preferably, dispersant is Tween 80, OP-10, organic silicon surfactant.
Preferably, auxiliary agent is glycerine.
Preferably, the weight ratio of azone, menthol and ethyl oleate is 3-5：1-2：1-2.
Preferably, Tween 80, OP-10, the weight ratio of organic silicon surfactant are 1-1.5：2-3：2-3.
Those skilled in the art prepare the bactericide for the treatment of bacterial blight of rice according to this area customary preparation methods.
The present invention has the effect of broad-spectrum sterilization, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, fourth from trifloxystrobin
Sesame oil cooperates, and with good antibiotic property, on the one hand can reduce the consumption of chemical antimicrobial trifloxystrobin, another aspect and oxime
Bacterium ester, which cooperates, further increases the antibiotic property of the present invention, and will not produce drug resistance；Trifloxystrobin, garlic oil, caryophyllus oil with
Bleeding agent is cooperated, and the present invention can be promoted to be permeated to paddy rice interior tissue, antibacterial effect is greatly increased；And trifloxystrobin,
Garlic oil, caryophyllus oil are engaged with dispersant so that each material is dispersed and can increase the present invention and the adhesiveness of paddy rice, makes
It is difficult to be washed, and further increases drug effect；From azone, menthol and ethyl oleate as bleeding agent, Tween 80, OP-10,
Organic silicon surfactant can further increase the osmosis and adhesiveness of the present invention as dispersant；And dispersant
Cooperated with auxiliary agent, each material can be promoted dispersed, it is to avoid the problem of drug effect skewness；Trifloxystrobin, salicylic acid first
Ester, diethyl aminoethyl hexanoate, small lamb's-quarters cooperate, and in the presence of bleeding agent, trifloxystrobin, garlic oil, caryophyllus oil, penetrate into inside paddy rice
Tissue, can activate the expression of paddy rice defensin gene, increase the resistance of paddy rice itself, be killed from enhancing paddy rice self resistance and outside
Two aspect collective effects of bacterium so that the present invention has the effect of good treatment bacterial blight of rice.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：2.5 parts of trifloxystrobin, traditional Chinese medicine extraction
25 parts of thing, 0.7 part of gaultherolin, 0.6 part of diethyl aminoethyl hexanoate, 2 parts of bleeding agent, 12 parts of dispersant, 9 parts of auxiliary agent, 150 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil.
Embodiment 2
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：2 parts of trifloxystrobin, Chinese medical extract
30 parts, 0.5 part of gaultherolin, 0.7 part of diethyl aminoethyl hexanoate, 1 part of bleeding agent, 15 parts of dispersant, 8 parts of glycerine, 200 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil, wherein,
Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 15：7：8：12：1：3；
Bleeding agent is azone, menthol and ethyl oleate；
Dispersant is Tween 80, OP-10, organic silicon surfactant.
Embodiment 3
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：3 parts of trifloxystrobin, Chinese medical extract
20 parts, 1 part of gaultherolin, 0.5 part of diethyl aminoethyl hexanoate, 3 parts of bleeding agent, 10 parts of dispersant, 10 parts of glycerine, 100 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil, wherein,
Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 20：5：10：10：3：1；
In the preparation process of Chinese medical extract, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and are uniformly mixed so as to obtain mixture；
Extracted successively with ethanol, acetone reflux, 5h is extracted every time, merged leaching liquor, be concentrated under reduced pressure, be dried to obtain intermediate material；By in
Between material and garlic oil, caryophyllus oil be uniformly mixed so as to obtain Chinese medical extract, mixture, ethanol, the weight ratio of acetone are 1：15：25；
Bleeding agent is azone, menthol and ethyl oleate, wherein, the weight ratio of azone, menthol and ethyl oleate is 3：
2：1；
Dispersant be Tween 80, OP-10, organic silicon surfactant, wherein, Tween 80, OP-10, organosilyl surface live
Property agent weight ratio be 1.5：2：3.
Embodiment 4
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：2.2 parts of trifloxystrobin, traditional Chinese medicine extraction
28 parts of thing, 0.6 part of gaultherolin, 0.65 part of diethyl aminoethyl hexanoate, 1.5 parts of bleeding agent, 13 parts of dispersant, 8.5 parts of glycerine, 170 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil, wherein,
Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 17：6.5：8.5：11.5：1.5：2.5；
In the preparation process of Chinese medical extract, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and are uniformly mixed so as to obtain mixture；
Extracted successively with ethanol, acetone reflux, 3h is extracted every time, merged leaching liquor, be concentrated under reduced pressure, be dried to obtain intermediate material；By in
Between material and garlic oil, caryophyllus oil be uniformly mixed so as to obtain Chinese medical extract, mixture, ethanol, the weight ratio of acetone are 1：20：20；
Bleeding agent is azone, menthol and ethyl oleate, wherein, the weight ratio of azone, menthol and ethyl oleate is 5：
1：2；
Dispersant be Tween 80, OP-10, organic silicon surfactant, wherein, Tween 80, OP-10, organosilyl surface live
Property agent weight ratio be 1：3：2.
Embodiment 5
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：2.8 parts of trifloxystrobin, traditional Chinese medicine extraction
22 parts of thing, 0.8 part of gaultherolin, 0.55 part of diethyl aminoethyl hexanoate, 2.5 parts of bleeding agent, 11 parts of dispersant, 9.5 parts of glycerine, 130 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil, wherein,
Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 19：5.5：9.5：10.5：2.5：1.5；
In the preparation process of Chinese medical extract, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and are uniformly mixed so as to obtain mixture；
Extracted successively with ethanol, acetone reflux, 4.5h is extracted every time, merged leaching liquor, be concentrated under reduced pressure, be dried to obtain intermediate material；Will
Intermediate material is uniformly mixed so as to obtain Chinese medical extract with garlic oil, caryophyllus oil, and mixture, ethanol, the weight ratio of acetone are 1：16：23；
Bleeding agent be azone, menthol and ethyl oleate, wherein, the weight ratio of azone, menthol and ethyl oleate is
3.5：1.8：1.2；
Dispersant be Tween 80, OP-10, organic silicon surfactant, wherein, Tween 80, OP-10, organosilyl surface live
Property agent weight ratio be 1.3：2.2：2.8.
Embodiment 6
A kind of bactericide for treating bacterial blight of rice, its raw material includes by weight：2.5 parts of trifloxystrobin, traditional Chinese medicine extraction
25 parts of thing, 0.7 part of gaultherolin, 0.6 part of diethyl aminoethyl hexanoate, 2 parts of bleeding agent, 12 parts of dispersant, 9 parts of glycerine, 150 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil, wherein,
Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 18：6：9：11：2：2；
In the preparation process of Chinese medical extract, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and are uniformly mixed so as to obtain mixture；
Extracted successively with ethanol, acetone reflux, 4h is extracted every time, merged leaching liquor, be concentrated under reduced pressure, be dried to obtain intermediate material；By in
Between material and garlic oil, caryophyllus oil be uniformly mixed so as to obtain Chinese medical extract, mixture, ethanol, the weight ratio of acetone are 1：17：22；
Bleeding agent is azone, menthol and ethyl oleate, wherein, the weight ratio of azone, menthol and ethyl oleate is 4：
1.5：1.5；
Dispersant be Tween 80, OP-10, organic silicon surfactant, wherein, Tween 80, OP-10, organosilyl surface live
Property agent weight ratio be 1.2：2.5：2.5.
Test example 1
Choose 2 pieces of paddy rices for having infectd leaf spot bacteria but not fallen ill also, it is its area, soil constituent, aqueous
Embodiment 6 is applied as test group in amount, Rice Cropping density all same, one piece of field, and common commercially available bactericide is applied in another piece of field
As a control group, the application method of two groups of bactericide is：After once spraying 7 days it is secondary again spray, the amount of spraying is every time
250ml/ mus, two groups of control measures are identical, and two groups of results are counted after 30 days, and the incidence of disease of test group drops than control group
It is low by 17%.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (8)
1. a kind of bactericide for treating bacterial blight of rice, it is characterised in that its raw material includes by weight：2-3 parts of trifloxystrobin,
20-30 parts of Chinese medical extract, 0.5-1 parts of gaultherolin, 0.5-0.7 parts of diethyl aminoethyl hexanoate, 1-3 parts of bleeding agent, dispersant 10-15
Part, 8-10 parts of auxiliary agent, 100-200 parts of water；
Wherein, the raw material of Chinese medical extract includes：Small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag, garlic oil, caryophyllus oil.
2. according to claim 1 treat bacterial blight of rice bactericide, it is characterised in that small lamb's-quarters, galangal, Chinese ephedra,
Grass-leaved sweetflag, garlic oil, the weight ratio of caryophyllus oil are 15-20：5-7：8-10：10-12：1-3：1-3.
3. the bactericide for the treatment of bacterial blight of rice according to claim 1 or claim 2, it is characterised in that in Chinese medical extract
In preparation process, small lamb's-quarters, galangal, Chinese ephedra, grass-leaved sweetflag are crushed and are uniformly mixed so as to obtain mixture；Soaked successively with ethanol, acetone reflux
Carry, 3-5h is extracted every time, merge leaching liquor, be concentrated under reduced pressure, be dried to obtain intermediate material；By intermediate material and garlic oil, cloves
Oil is uniformly mixed so as to obtain Chinese medical extract, and mixture, ethanol, the weight ratio of acetone are 1：15-20：20-25.
4. according to the bactericide of any one of the claim 1-3 treatment bacterials blight of rice, it is characterised in that bleeding agent is nitrogen
Ketone, menthol and ethyl oleate.
5. according to the bactericide of any one of the claim 1-4 treatment bacterials blight of rice, it is characterised in that dispersant is to tell
Temperature 80, OP-10, organic silicon surfactant.
6. according to the bactericide of any one of the claim 1-5 treatment bacterials blight of rice, it is characterised in that auxiliary agent is sweet
Oil.
7. the bactericide of bacterial blight of rice is treated according to claim 4, it is characterised in that azone, menthol and oleic acid
The weight ratio of ethyl ester is 3-5：1-2：1-2.
8. treat the bactericide of bacterial blight of rice according to claim 5, it is characterised in that Tween 80, OP-10, organic
The weight ratio of silicon surface active agent is 1-1.5：2-3：2-3.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101617692A (en) * | 2008-07-05 | 2010-01-06 | 刘太玉 | Method for preparing plant medicament for preventing and controlling rice bacterial leaf blight |
| CN102047919A (en) * | 2009-11-10 | 2011-05-11 | 刘太玉 | Plant medicament for preventing and controlling rice bacterial leaf blight |
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| CN105724458A (en) * | 2016-01-29 | 2016-07-06 | 卞佳林 | Pesticide for preventing and treating rice bacterial blight and preparation method thereof |
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| CN105410063A (en) * | 2015-11-18 | 2016-03-23 | 无锡市稼宝药业有限公司 | Farm chemical for rice bacterial leaf blight |
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