CN109452289A - A kind of plant growth regualting composition, preparation and its application - Google Patents
A kind of plant growth regualting composition, preparation and its application Download PDFInfo
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- CN109452289A CN109452289A CN201811519329.3A CN201811519329A CN109452289A CN 109452289 A CN109452289 A CN 109452289A CN 201811519329 A CN201811519329 A CN 201811519329A CN 109452289 A CN109452289 A CN 109452289A
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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
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/647—Triazoles; Hydrogenated triazoles
- A01N43/653—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
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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
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
-
- 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
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
It includes: active components A and active constituent B that the present invention, which discloses a kind of plant growth regualting composition, preparation and its application, the composition,；The active components A is gibberellin biological synthetic inhibitor, and the active constituent B is cyclopropyl amic acid；The active components A and the active constituent B weight ratio are 0.01-100:1；The composition or the composite preparation make in plant, can inhibit plant New shoot growth, keep Ornamental Feature function and effect possessed by plant stem-leaf itself obvious, and have synergistic function.
Description
Technical field
The present invention relates to technical field of pesticide, and in particular to a kind of plant growth regualting composition, preparation and its application.
Background technique
Plant growth regulator is a kind of exogenous non-nutritive chemical substance, can usually be conducted in plant to
Site of action can be promoted or be inhibited certain steps during plant vital activity with lower concentration, change the property of plant
Shape is allowed to meeting human needs' characteristic growth；It is to be different from killing since the specific function of plant growth regulator acts on
Worm agent, fungicide, herbicide and the pesticide classification new as one, reasonable employment plant growth regulator have become Modern Agriculture
An one of mark for industry development.
Existing plant growth regulator is usually that each effective component is administered alone, and the people that often will cause medication is administered alone
Work cost is excessively high, meanwhile, single medicament is usually higher to the side effect of crop, can not meet the need of plant culture and maintenance very well
It wants.
For example, existing gibberellin biological synthetic inhibitor is administered alone, there are many disadvantages.The branches and leaves of plant are excessively thick
It is close, it will affect plant leaf blade to the utilization efficiency of light, while also branches and leaves and flowers and fruits can be made to be easier to catch an illness；And there is branch transverse direction
Growth or sagging (plant branch negative geotropism decrease) etc., many years multiple applications gibberellin biological big to the affect trait of plant
Synthetic inhibitor can seriously affect plant stable yields, the ability of high yield, reduce so as to cause serviceability of the plant to grower.Its
In, paclobutrazol, uniconazole P etc. are usually applied to gardening plant, can delay plant growth, but blade length-width ratio reduces, leaf color is dense
Green, branch is sagging, blade raw distance reduce, seriously affect the ornamental value of plant sometimes；Aerial growth is suppressed
System, root growth are reinforced, the Acceleration of growth after a period of time, compensatory growth occur, and macro manifestations are the holding effect of retarding of growing
Property it is insufficient；Paclobutrazol, uniconazole P are in actual use it has also been found that the disadvantage of quick-acting deficiency；It is applied alone paclobutrazol, uniconazole P to reach
To the apparent effect for adjusting growth, the use concentration needed is often higher, and since it is difficult to degrade, and is unfavorable for reducing agriculture
It is residual, also be unfavorable for protect environment, also will affect the growth in next season or next batch of plant, bring loss to grower.
Summary of the invention
In view of this, this application provides a kind of plant growth regualting composition, preparation and its applications；The composition or
The composite preparation makees in plant, can inhibit plant New shoot growth, and Ornamental Feature possessed by plant stem-leaf itself is kept to make
It is obvious with effect, and there is synergistic function.
In order to solve the above technical problems, technical solution provided by the invention is a kind of plant growth regualting composition, described
Composition includes: active components A and active constituent B；The active components A is gibberellin biological synthetic inhibitor, the activity
Ingredient B is cyclopropyl amic acid；The active components A and the active constituent B weight ratio are 0.01-100:1.
Preferably, the active components A is selected from 2- chloroethyl trimethyl oronain, 2- bromoethyl trimethylammonium bromide, allyl
Base trimethyl ammonium chloride, 2- chlorallyl trimethyl ammonium chloride, 5- isopropyl -2- methyl -4- (piperidine formyl oxygroup) phenyl three
Ammonio methacrylate, 1,1- dimethylpiperidine chloride, 4,4- thebaine chloride, 1,1- dimethyl pyrazine bromination
In object, paclobutrazol, uniconazole P, triapenthenol, triazolone, LAB 150978, olefin conversion, Flusilazole, propiconazole and difenoconazole
Any one or more.
Preferably, the active components A is uniconazole P.
Preferably, the active components A and the active constituent B weight ratio are 0.1-10:1.
Preferably, the active components A and the active constituent B weight ratio are 1:1.
Preferably, the composition is made of the active components A and the active constituent B.
The present invention also provides a kind of plant growth regualting composition preparation, by above-mentioned plant growth regualting composition and
Pharmaceutically acceptable auxiliary material composition.
Preferably, using conventional dosage form when the plant growth regualting composition preparation uses.Using in preparation
The adjuvant generallyd use in processing technology, be processed into missible oil, it is directly sprayable or can dilute solution, can diluting emulsion, wettable
Property pulvis pulvis, soluble powder, pulvis, suspending agent, granule or microcapsule formulations.
Preferably, the plant growth regualting composition preparation is adopted prepares in a known manner,
Preferably, by mixing plant growth regulator with the processing aids, crushing and/or stirring and dissolving
And/or grinding.Also preparation additionally can be prepared using surface active cpd.
Suitable surface active cpd be nonionic with good emulsification, dispersion and wettability, cation, yin from
Son and/or amphoteric surfactant and surfactant mixture.Numerous compositions of the invention can by weight comprising from
The active constituent of 0.001%-99%.Suitably, the composition includes by weight from the active constituent of 0.001%-50%.More
Suitably, the composition includes by weight from the active constituent of 1%-50%.More suitably, the composition includes by weight
From the active constituent of 10%-50%.If preparation is the form in a kind of concentrate, it is desirable that be diluted with water before use, then
It by comprising than do not have to dilution i.e. be ready for using composition higher amount active constituent.
The present invention also provides above-mentioned plant growth regualting compositions to delay plant growth, keeps plant stem-leaf institute itself
The application for the Ornamental Feature having.
Preferably, the plant is vegetables, the fruit tree, ornamental plant in gardening.
Preferably, the plant is red wood, photinia glabra.
The present invention reasonably selects known plant growth regulating substance, forms plant growth regulator composition, is applied to
It quick-acting and lasting effect can be obtained after rate of application more lower than existing single component or known composition, application on plant
It to improvement, and due to the synergistic effect between composition, can achieve being applied alone any one component cannot achieve as a result, making to plant
The character of object is more excellent.Using composition of the invention, be conducive to environmental protection, be conducive to the income for improving grower.
According to the present invention, a kind of method for adjusting useful plant growth is provided, including to the plant, each portion of plant
Divide, plant propagation material or plant growth site apply cyclanilide and the conjunction of gibberellic acid biology with effectively measuring with concertedness
The plant, plant parts, plant propagation material are successively applied at the composition of inhibitor, and by each group of the composition
Material or plant growth site.
We have found that the active components A and the active constituent B act on plant with " synergistic effect " in studying.
The active components A and the active constituent B are applied to plant together or successively, in the pumping of the sprouting of identical period implants
Raw amount and the speed of growth are significantly slower than the speed of growth that the active components A or the active constituent B is applied alone.It is described activity at
The A and active constituent B is divided to be applied to plant together or successively, the efficiency for controlling plant growth, which is higher than, is used alone the activity
The ingredient A or active constituent B.
Term " plant " refers to all tangible parts of plant, including seed, seedling, shoot, root, stem tuber, stem, stalk,
Leaf and fruit and combinations thereof.
Term plant " propagation material " indicates the reproductive part that can be used for raising up seed of the plant, such as seed, with
And nutritive material, such as bud, cutting or stem tuber, such as potato.Specifically, it includes seed (on stricti jurise), root, fruit
Reality, stem tuber, bulb, rhizome and other parts that can be used to cultivate into new plant of plant." propagation material " can also include
The budding plant transplanted after germination or after breaking ground and young plant.Suitably " plant propagation material " is understood that
To refer to the common propagation material such as seed, root tuber.
Term " plant growth site " be intended to include plant growth place, the propagation material of these plants is able to herein
It sows or the propagation material of these useful plants is placed in soil or other cultivation matrixes herein.The one of this place
A example is exactly field, herein plant growth.
" applying together " of the present invention refers to, two or more pesticide, fertilizer, auxiliary agent, using " bucket is mixed "
Mode is uniformly mixed application or is configured to uniform mixture in a same vessel and is applied on plant.
" successively applying " of the present invention refers to, two or more pesticide, fertilizer, auxiliary agent, within a certain period of time,
As being successively applied on plant in a week or one month.
These composition rate of application of the invention and the target plant species to be controlled, goal of regulation and control, method of administration, application
The influence factors such as time, leading climatic condition are related.Usually every kind of these compounds of the invention with 0.001kg/ha-4kg/
Ha is particularly preferably applied from the dose rate of 0.01kg/ha-0.8kg/ha preferably from 0.005kg/ha-1kg/ha.
Composition of the invention can be applied to any dicotyledonous crops, for example, spinach, lettuce, cabbage, carrot, kind
Eggplant, potato, cucurbit or pimiento, beet, cucurbita pepo, cucumber or muskmelon, orange, lemon, grape fruit, orange, pears, apple,
Lee, peach, cherry, strawberry, blackberry, blueberry, raspberry, cortex cinnamomi, banana, durian, such as semen viciae fabae, shore beans, pea or soybean, such as rape,
Leaf mustard, olive, sunflower, coconut, castor oil plant, cocoa bean or peanut, such as rubber tree, pine tree, cotton, flax, hemp,
Jute, flowers, shrub, broad leaf tree, coniferous tree, etc..It can also be applied to any monocotyledon, such as wheat, rice, grain, corn, grass
Deng.Other useful plants can be also applied to.The citing does not form any limitation of the invention.
Compared with prior art, detailed description are as follows by the application:
Plant growth regualting composition provided by the invention passes through component screening and proportion, active components A of the present invention
For gibberellin biological synthetic inhibitor, can inhibit gibberellin biological synthesis causes reduced growth；The active constituent B is ring
Malonamic acid is a kind of novel cyclopropyl-carboxylic acid's class plant growth regulator, with regulating plant growth element level and can be transported,
Weaken the apical dominance of plant, have and increase grain yield, fruit abscission can be prevented, Accelerate bloom result, resistant to lodging, enhancing are supported
The effect of drag.Yu Zhi is made using active components A and active constituent the B composition compounded or the preparation containing the composition
Object had not only reduced the concentration of gibberellic acid in plant, but also has reduced the concentration of auxin in plant, can inhibit plant New shoot growth,
Keep Ornamental Feature function and effect possessed by plant stem-leaf itself obvious, and two active constituents have synergistic function.
Specific embodiment
It is right combined with specific embodiments below in order to make those skilled in the art more fully understand technical solution of the present invention
The present invention is described in further detail.
Embodiment 1
Aqueous suspension agent
Processing technology: it under high-speed mixer effect after mixing by the above various raw materials, is pumped into sand mill and is sanded
It is less than 5um discharging unlap to diameter.
Embodiment 2
Aqueous suspension agent
Processing technology: it under high-speed mixer effect after mixing by the above various raw materials, is pumped into sand mill and is sanded
It is less than 5um discharging unlap to diameter.
Embodiment
Soluble liquid
Processing technology: by the above various raw materials in stirring and dissolving unlap after mixing.
Embodiment 4
Effect experiment
1, experimental subjects: red wood
2, experimental method: taking the red wood hedgerow being trimmed to be tested, every group of 3 repetition, every time repeatedly 2m2, repair
After cutting 2 days, plant height is observed and recorded.It is handled using medicament, processing method are as follows: pushed up with compression sprayer from plant
Portion is uniformly sprayed to root, is carried out the 1st medicament after trimming 2 days and is sprayed processing, and every 10d sprays processing 1 time with medicament later,
Continuous spraying is handled 3 times, and the amount of spraying is preferably 75mL/m every time2.New pumping branch is measured with ruler after stopping application 30 days
Length.
3, it data statistic analysis: is analyzed using DPS6.55 (Duncan) statistical software.It is calculated according to test data
Each group shoot average length C out1, average length inhibiting rate T relative to blank control1。
4, evaluation method:
Deliberated index T after the component of practical measurement is mixed1The theory index E obtained with Colby formula1It compares；
The difference of actual value and theoretical value be greater than 10% be synergy effect, the difference of actual value and theoretical value is situated between
It is the effect of addition between ± 10%, it is antagonism that the difference of actual value and theoretical value, which is less than -10%,.
Calculation formula is as follows:
Gowing formula: E=x+y-xy/100；X, y is that the resulting practical increment rate of each component is applied alone respectively or actually subtracts
Few rate.
5, test result: it is shown in Table 1.
Table 1 --- single dose or composition are applied to the test result of red wood hedgerow
As can be seen from the above table, it is 0.01-100:1 that the active components A and the active constituent B weight ratio, which are weight ratio,
When, the speed of growth of red wood shoot can be significantly reduced in plant growth regualting composition provided by the invention, i.e. inhibition plant
The function and effect of New shoot growth are obvious, and have synergistic function.
Embodiment 5
Pharmacodynamic test
1, experimental subjects: photinia glabra
2, experimental method: taking the photinia glabra hedgerow being trimmed to be tested, every group of 3 repetition, every time repeatedly 2m2,
After trimming 2 days, plant height is observed and recorded.It is handled using medicament, processing method are as follows: use compression sprayer from plant
Top is uniformly sprayed to root, is carried out the 1st medicament after trimming 2 days and is sprayed processing, every 10d sprays processing 1 with medicament later
Secondary, continuous spraying is handled 3 times, and the amount of spraying is preferably 75mL/m every time2.New pumping branch is measured with ruler after stopping application 30 days
The length of item.
3, it data statistic analysis: is analyzed using DPS6.55 (Duncan) statistical software.It is calculated according to test data
Each group shoot average length C out2, average length inhibiting rate T relative to blank control2。
4, evaluation method:
Deliberated index T after the component of practical measurement is mixed2The theory index E obtained with Colby formula2It compares；
The difference of actual value and theoretical value be greater than 10% be synergy effect, the difference of actual value and theoretical value is situated between
It is the effect of addition between ± 10%, it is antagonism that the difference of actual value and theoretical value, which is less than -10%,.
Calculation formula is as follows:
Gowing formula: E=x+y-xy/100；X, y is that the resulting practical increment rate of each component is applied alone respectively or actually subtracts
Few rate.
5,2 test result: are shown in Table.
Table 2 --- single dose or composition are applied to the test result of photinia glabra hedgerow
As can be seen from the above table, it is 0.01-100:1 that the active components A and the active constituent B weight ratio, which are weight ratio,
When, the speed of growth of photinia glabra shoot can be significantly reduced in plant growth regualting composition provided by the invention, that is, inhibits to plant
The function and effect of object New shoot growth are obvious, and have synergistic function.
Embodiment 6
Effect experiment
1, experimental subjects: red wood
3, experimental method: taking the red wood hedgerow being trimmed to be tested, every group of 3 repetition, every time repeatedly 2m2, repair
After cutting 2 days, plant height is observed and recorded.It is handled using medicament, processing method are as follows: pushed up with compression sprayer from plant
Portion is uniformly sprayed to root, is carried out the 1st medicament after trimming 2 days and is sprayed processing, and every 10d sprays processing 1 time with medicament later,
Continuous spraying is handled 3 times, and the amount of spraying is preferably 75mL/m every time2.It is newly taken out with measurement later within stopping application 30 days vimineous straight
Diameter.
3, it data statistic analysis: is analyzed using DPS6.55 (Duncan) statistical software.It is calculated according to test data
Each group shoot average diameter C out3, average diameter growth rate T relative to blank control3。
4, evaluation method:
Deliberated index T after the component of practical measurement is mixed3The theory index E obtained with Colby formula3It compares；
The difference of actual value and theoretical value be greater than 10% be synergy effect, the difference of actual value and theoretical value is situated between
It is the effect of addition between ± 10%, it is antagonism that the difference of actual value and theoretical value, which is less than -10%,.
Calculation formula is as follows:
Gowing formula: E=x+y-xy/100；X, y is that the resulting practical increment rate of each component is applied alone respectively or actually subtracts
Few rate.
5,3 test result: are shown in Table.
Table 3 --- single dose or composition are applied to the test result of red wood hedgerow
As can be seen from the above table, it is 0.01-100:1 that the active components A and the active constituent B weight ratio, which are weight ratio,
When, plant growth regualting composition provided by the invention can significantly improve red wood shoot diameter, that is, keep plant stem-leaf sheet
Ornamental Feature function and effect possessed by body are obvious, and have synergistic function.
Embodiment 7
Pharmacodynamic test
1, experimental subjects: photinia glabra
2, experimental method: taking the photinia glabra hedgerow being trimmed to be tested, every group of 3 repetition, every time repeatedly 2m2,
After trimming 2 days, its plant height is observed and recorded.It is handled using medicament, processing method are as follows: use compression sprayer from plant
Strain top is uniformly sprayed to root, is carried out the 1st medicament after trimming 2 days and is sprayed processing, every 10d sprays processing with medicament later
1 time, continuous spraying is handled 3 times, and the amount of spraying is preferably 75mL/m every time2.It uses using bevel protractor after stopping application 30 days to red
Leaf Chinese photinia shoot angle degree is measured.
3, it data statistic analysis: is analyzed using DPS6.55 (Duncan) statistical software.It is calculated according to test data
Each group shoot average angle degree C out4, average angle degree growth rate T relative to blank control4。
4, evaluation method:
Deliberated index T after the component of practical measurement is mixed4The theory index E obtained with Colby formula4It compares；
The difference of actual value and theoretical value be greater than 10% be synergy effect, the difference of actual value and theoretical value is situated between
It is the effect of addition between ± 10%, it is antagonism that the difference of actual value and theoretical value, which is less than -10%,.
Calculation formula is as follows:
Gowing formula: E=x+y-xy/100；X, y is that the resulting practical increment rate of each component is applied alone respectively or actually subtracts
Few rate.
5,4 test result: are shown in Table.
Table 4 --- single dose or composition are applied to the test result of photinia glabra hedgerow
As can be seen from the above table, the active components A single dose or the active constituent B single dose hedgerow shoot meeting is administered alone
There is negatively growth decrease, especially applies the active components A of higher concentration, hedgerow new life branch is sagging, significantly reduces
The ornamental value of hedgerow.And when it is 0.01-100:1 that the active components A and the active constituent B weight ratio, which are weight ratio,
Plant growth regualting composition provided by the invention is applied, the branch that meeting occurs when significantly attenuating single dose is applied, which is negatively grown, to be subtracted
The generation of weak phenomenon keeps the ornamental value of hedgerow, the i.e. function and effect of Ornamental Feature possessed by holding plant stem-leaf itself
Obviously.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (10)
1. a kind of plant growth regualting composition, which is characterized in that the composition includes: active components A and active constituent B；
The active components A is gibberellin biological synthetic inhibitor, and the active constituent B is cyclopropyl amic acid；The active components A and
The active constituent B weight ratio is 0.01-100:1.
2. composition according to claim 1, which is characterized in that the active components A is selected from 2- chloroethyl trimethyl chlorine
Ammonium, 2- bromoethyl trimethylammonium bromide, allyl trimethyl ammonium chloride, 2- chlorallyl trimethyl ammonium chloride, 5- isopropyl -2-
Methyl -4- (piperidine formyl oxygroup) phenyl trimethicone ammonium chloride, 1,1- dimethylpiperidine chloride, 4,4- thebaine
Chloride, 1,1- dimethyl pyrazine bromide, paclobutrazol, uniconazole P, triapenthenol, triazolone, LAB 150978, olefin conversion,
Any one or more in Flusilazole, propiconazole and difenoconazole.
3. composition according to claim 2, which is characterized in that the active components A is uniconazole P.
4. composition according to claim 1, which is characterized in that the active components A and the active constituent B weight ratio
For 0.1-10:1.
5. composition according to claim 4, which is characterized in that the active components A and the active constituent B weight ratio
For for 1:1.
6. composition according to claim 1, which is characterized in that the composition is by the active components A and the work
Property ingredient B composition.
7. a kind of plant growth regualting composition preparation, which is characterized in that by plant growth described in any one of claims 1-6
Regulation composition and pharmaceutically acceptable auxiliary material composition.
8. plant growth regualting composition described in claim 1-6 is delaying plant growth, plant stem-leaf itself is kept to be had
The application of some Ornamental Features.
9. application according to claim 8, which is characterized in that the plant is vegetables, fruit tree, ornamental plant in gardening
Object.
10. application according to claim 8, which is characterized in that the plant is red wood, photinia glabra.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110810423A (en) * | 2019-11-29 | 2020-02-21 | 中国农业科学院棉花研究所 | Crop yield increasing composition and sweet potato planting method |
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| CN1029958C (en) * | 1986-03-31 | 1995-10-11 | 联合碳化农产化学品公司 | Malonic acid derivative applied to hold back plant growth |
| US5478796A (en) * | 1994-03-04 | 1995-12-26 | Rhone-Poulenc Agrochimie | Plant growth regulatory mixture comprising mepiquat and cyclanilide or other cyclopropylmalonic acid anilides |
| CN104068050A (en) * | 2014-06-20 | 2014-10-01 | 四川国光农化股份有限公司 | Plant growth regulation composition and application thereof |
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| CN110810423A (en) * | 2019-11-29 | 2020-02-21 | 中国农业科学院棉花研究所 | Crop yield increasing composition and sweet potato planting method |
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Application publication date: 20190312 |