阅读说明：本技术 一种含有氟节胺和多效唑的植物生长调节剂组合物在棉花打顶上的应用 (Application of plant growth regulator composition containing flumetralin and paclobutrazol in cotton topping ) 是由 罗昌炎 詹姆斯·T·布里斯托 于 2018-07-11 设计创作，主要内容包括：本发明提供了一种含有氟节胺和多效唑的植物生长调节剂组合物在棉花打顶上的应用,所述植物生长调节剂组合物施用至棉花植物的叶部和顶部,所述氟节胺和多效唑的重量配比为50:1-1:50。本发明还提供了一种改善棉花植物作物的产量和/或棉花纤维品质的方法。(The invention provides application of a plant growth regulator composition containing flumetralin and paclobutrazol to cotton topping, wherein the plant growth regulator composition is applied to the leaves and tops of cotton plants, and the weight ratio of the flumetralin to the paclobutrazol is 50:1-1: 50. The invention also provides a method of improving the yield of a cotton plant crop and/or the quality of cotton fiber.)

1. Use of a plant growth regulator composition comprising flumetralin and paclobutrazol for cotton topping, wherein the plant growth regulator composition is applied to the foliage and tops of cotton plants.

2. Use according to claim 1, wherein the weight ratio of flumetralin to paclobutrazol is 50:1 to 1:50, preferably 25:1 to 1:25, more preferably 20:1 to 1:20, more preferably 15:1 to 1:15, more preferably 10:1 to 1:10, more preferably 8:1 to 1:8, more preferably 5:1 to 1: 5.

3. Use according to claim 2, wherein the plant growth regulator composition comprises flumetralin and paclobutrazol, together with agriculturally acceptable adjuvants and/or carriers.

4. The use according to claim 3, wherein the plant growth regulator composition comprises 5% to 80%, preferably 10% to 70%, more preferably 10% to 60% by weight of the plant growth regulator composition, of the sum of the mass of flumetralin and paclobutrazol.

5. The use of claim 3, wherein the plant growth regulator composition is in the form of effervescent tablets, water dispersible granules, suspending agents, suspoemulsions, aqueous emulsions, emulsifiable concentrates, ultra-low volume liquids, electrostatic oil solutions, dispersible oil suspensions, granules or dry suspensions.

6. A method of treating a cotton plant comprising applying a plant growth regulator composition comprising flumetralin and paclobutrazol to the foliage and tops of the cotton plant.

7. The method according to claim 6, wherein the weight ratio of flumetralin to paclobutrazol in the plant growth regulator composition is 50:1 to 1:50, preferably 25:1 to 1:25, more preferably 20:1 to 1:20, more preferably 15:1 to 1:15, more preferably 10:1 to 1:10, more preferably 8:1 to 1:8, more preferably 5:1 to 1: 5.

8. The method as set forth in claim 6, wherein the plant growth regulator composition containing flumetralin and paclobutrazol is applied to the foliage and the top of cotton plants from the first occurrence of fine buds to the full bloom stage.

9. A method of improving the yield of a crop of cotton plants and/or the quality of cotton fiber comprising applying to cotton a plant growth regulator composition comprising flumetralin and paclobutrazol.

10. The method according to claim 9, wherein the weight ratio of flumetralin to paclobutrazol in the plant growth regulator composition is 50:1 to 1:50, preferably 25:1 to 1:25, more preferably 20:1 to 1:20, more preferably 15:1 to 1:15, more preferably 10:1 to 1:10, more preferably 8:1 to 1:8, more preferably 5:1 to 1: 5.

11. The method of claim 9, comprising applying the plant growth regulator composition comprising flumetralin and paclobutrazol to the foliage and tops of cotton plants.

12. The method of claim 9, comprising the step of isolating the plant growth regulator composition from the concentrate by (i) diluting the concentrate of the plant growth regulator composition comprising flumetralin and paclobutrazol in water; (ii) the diluted composition was applied to the top and foliage of cotton plants.

Technical Field

The invention relates to the field of agriculture, in particular to application of a plant growth regulator composition containing flumetralin and paclobutrazol to cotton topping.

Background

In the cotton production process, the topping work is taken as a key link, and the effect is very important. The growth advantage of the top end of the cotton can be eliminated by topping, more nutrients are supplied for the growth of reproductive organs, the early boll-receiving and multi-boll-receiving of cotton balls are promoted, the quality of the cotton is improved, and the effect of increasing the yield is obvious. For years, Chinese cotton topping mainly depends on manpower, and manual topping has large labor demand, high labor intensity and low working efficiency, thereby influencing the yield of cotton.

In order to replace manual cotton topping, various topping machines are used for cotton topping, so that the manual labor intensity is reduced to a certain extent, and the operation efficiency is improved. For example, CN106386201A discloses an electro-hydraulic control cotton topping machine, which is suitable for cotton of different growth vigor by rotary cutting topping; the cotton topping machine disclosed in CN104996181B can realize flexible and accurate profiling movement, and cut off cotton plants between two cutters, so that topping is reliable and stable. However, mechanical topping often results in excessive loss of cotton plants, bolls, and affects cotton yield.

The appearance of the chemical topping agent further realizes the high-efficiency operation of cotton topping. The chemical topping is to utilize plant growth regulator to delay or inhibit the growth of cotton tip and control its unlimited growth habit, so as to achieve the goal of regulating vegetative growth and reproductive growth by artificial topping. CN104067869B discloses a chemical topping method for an early maturing cotton area, wherein a chemical topping water agent comprises the following components in percentage by weight: 15-20% of mepiquat chloride soluble powder, 5-10% of Tuoyuta cotton topping water agent and 70-80% of water, wherein the Tuoyuta cotton topping water agent comprises the following components in percentage by weight, including 20-25% of flumetralin emulsion, 0.01% of naphthalene boric acid, 15-20% of emulsifier, 8-15% of dispersant, 5-10% of cosolvent and 2-5% of stabilizer; CN103518762B discloses a chemical topping agent for cotton, which contains 5-80 wt% of active ingredients of tebuthiuron and flumetralin, wherein the weight ratio of the tebuthiuron to the flumetralin is 1:1-1: 30; CN102823411B discloses a topping agent as follows: 20-30% of mepiquat chloride water emulsion and 40-60% of water in percentage by weight; 15% -25% of flumetralin emulsion.

Flumetralin is a synthetic plant growth regulator containing fluorine nitrobenzene or quaternary ammonium salt, is a typical plant growth inhibitor, can inhibit division and growth of somatic cells in axillary buds after entering a plant body, thereby inhibiting the germination of the axillary buds, dwarfing the plant, thickening the stem, thickening the petiole, increasing chlorophyll and enhancing photosynthesis, and is usually used as a tobacco bud inhibitor.

However, when the flumetralin is independently applied as a cotton topping agent, the application effect is unstable, and the flumetralin also has a remarkable inhibiting effect on cotton bolls and leaves at the tops of cotton plants, so that the development of the top bolls is hindered, and in addition, the delayed boll opening of cotton and the late maturity of cotton are often caused.

Therefore, there is a demand for a cotton topping agent which has a low dose, is excellent in the persistence of the chemical effect, does not induce chemical damage, and can improve the labor productivity; meanwhile, the cotton topping agent is expected to effectively improve the cotton yield and improve the cotton fiber quality.

Disclosure of Invention

The invention provides the application of a plant growth regulator composition containing flumetralin and paclobutrazol in cotton topping, which can lead to improvement of cotton production, increase of cotton yield and/or improvement of cotton fiber quality even in the absence of obvious disease pressure.

Accordingly, the present invention provides the use of a plant growth regulator composition comprising flumetralin and paclobutrazol in cotton.

The invention provides application of a plant growth regulator composition containing flumetralin and paclobutrazol in cotton topping.

The invention provides application of a plant growth regulator composition containing flumetralin and paclobutrazol in cotton topping, wherein the plant growth regulator composition is applied to the leaves and tops of cotton plants.

The application of the plant growth regulator composition containing the flumetralin and the paclobutrazol to cotton topping leads to improvement of cotton production, improves cotton yield and/or cotton fiber quality, and even shows a synergistic effect under the condition of lacking obvious disease pressure.

The invention provides application of a plant growth regulator composition containing flumetralin and paclobutrazol in cotton topping, wherein the flumetralin and the paclobutrazol are applied in a proportion that the plant growth regulator composition has a synergistic effect in increasing cotton yield and/or improving cotton fiber quality. The weight ratio of the flumetralin to the paclobutrazol is 50:1-1:50, preferably 25:1-1:25, more preferably 20:1-1:20, more preferably 15:1-1:15, more preferably 10:1-1:10, more preferably 8:1-1:8, more preferably 5:1-1: 5.

The weight ratio of the flumetralin to the paclobutrazol may be 50:1, 49:1, 48:1, 47:1, 46:1, 45:1, 44:1, 43:1, 42:1, 41:1, 40:1, 39:1, 38:1, 37:1, 36:1, 35:1, 34:1, 33:1, 32:1, 31:1, 30:1, 29:1, 28:1, 27:1, 26:1, 25:1, 24:1, 23:1, 22:1, 21:1, 20:1, 19:1, 18:1, 17:1, 16:1, 15:1, 14:1, 13:1, 12:1, 11:1, 10:1, 9:1, 8:1, 7:1, 6:1, 5:1, 4:1, 3:1, 2:1, 1:2, 1:1, 4:1, 9:1, 8:1, 7:1, 6:1, 1:1, 4:1, 3:1, 1:1, 1:1, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49, 1: 50.

The plant growth regulator composition comprises flumetralin and paclobutrazol, and agriculturally acceptable auxiliaries and/or carriers.

In the plant growth regulator composition according to the present invention, the sum of the mass of flumetralin and paclobutrazol is 5% to 80%, preferably 10% to 70%, more preferably 10% to 60% of the plant growth regulator composition, and if the plant growth regulator composition is in the form of a concentrate that needs to be diluted with water before use, it will contain a higher amount of active ingredient than a composition that can be used without dilution.

In the plant growth regulator composition, the sum of the mass of the flumetralin and the paclobutrazol accounts for 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 60%, 65%, 70%, 75%, 80% of the plant growth regulator composition.

Furthermore, the plant growth regulator composition can be prepared into any agriculturally acceptable dosage form, and preferably prepared into effervescent tablets, water dispersible granules, suspending agents, suspoemulsions, emulsion in water, missible oil, ultra-low volume liquid agents, electrostatic oil agents, dispersible oil suspending agents, granules, oil suspending agents or dry suspending agents.

The above dosage forms are conventional in the art, and the methods for preparing the dosage forms are well known to those skilled in the art, and the agricultural adjuvants and/or carriers and the amounts thereof used to prepare the above dosage forms are also well known to those skilled in the art, and can be found, for example, in the "agricultural dosage form processing technology" (edited by Liu Walsh, second edition). Adjuvants and/or carriers used include, for example, but are not limited to, solvents, co-solvents, emulsifiers, dispersants, wetting agents, wall materials, binders, film-forming agents, disintegrants, thickeners, antifreeze, stabilizers, pH adjusters, warning colors, fillers and/or carriers, and the like.

In the composition of the present invention, the solvent may be selected from: benzene, toluene, xylene, acetone, dimethylformamide, dimethyl sulfoxide, chloroform, dichloromethane, cyclohexane, cyclohexanone, N-methylpyrrolidone, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, cyclohexanol, methyl glycol ether, ethyl glycol ether, petroleum ether, acetonitrile, paraffin, tetrahydronaphthalene, isophorone, soybean oil, cottonseed oil, and the like.

The cosolvent can be selected from: one or more of methanol, ethanol, isopropanol, n-butanol, etc.

The emulsifier can be selected from: sodium lauryl sulfate, sodium dodecylbenzenesulfonate, calcium dodecylbenzenesulfonate, nonylphenol polyoxyethylene ether phosphate amine salt, castor oil polyoxyethylene ether phosphate amine salt, tristyrylphenol polyoxyethylene ether phosphate amine salt, polyoxyethylene fatty amide, alkylpyridinium salt, alkylisoquinolinium salt, dialkylmorpholinium salt, oleamide sulfonate, diisopropylnaphthalenesulfonate, lignosulfonate, one or more of a naphthalenesulfonate formaldehyde condensate, styrylphenyl polyoxyethylene ether, phenethylphenol polyoxyethylene polyoxypropylene ether, nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene block polymer, alkylphenol formaldehyde resin polyoxyethylene ether, polyoxyethylene sorbitol fatty acid ester, sorbitan monostearate polyoxyethylene ether, polyoxypropylene glycol monofatty acid ester and the like.

The dispersing agent can be selected from: one or more of lignosulfonate, sodium p-hydroxyphenyl lignosulfonate, fatty alcohol polyoxyethylene ether sulfate, alkylnaphthalene sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, dodecyl trimethyl ammonium salt, alkyldimethylbenzyl ammonium salt, polyoxyethylene lauryl ether phosphate, styrene-maleic acid salt copolymer, fatty alcohol polyoxyethylene ether phosphate, nonylphenol polyoxyethylene ether, glycerin fatty acid polyoxyethylene ether, polyoxyethylene alkylaryl ether, polyoxyethylene lanolin alcohol, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glyceryl monofatty acid ester, alkylolamide, polyoxyethylene alkylamine, and the like.

The wetting agent can be selected from: one or more of sodium lauryl sulfate, calcium dodecylbenzenesulfonate, sodium isooctyl succinate, sodium oleoyl methyltaurate, sodium polyoxyethylene lauryl ether carboxylate, sodium lauroyl sarcosinate, sodium N-lauroyl glutamate, dioctyl sulfosuccinate, polyoxyethylene alkylaryl ether phosphate, trisiloxane polyoxyethylene ether, tristyrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene polyether formaldehyde condensate, alkylphenol polyoxyethylene ether phosphate, polyoxyethylene fatty acid ester, higher fatty acid glyceride, sorbitan fatty acid ester, and the like.

The adhesive can be selected from: one or more of starch, polyvinylpyrrolidone, carboxymethyl cellulose, carboxyethyl cellulose, gelatin, gum arabic, xanthan gum, etc.

The film forming agent can be selected from: one or more of polyvinyl alcohol, polyvinyl acetate, polyacrylamide, carboxymethyl cellulose, hydroxypropyl cellulose, acacia, gelatin, xanthan gum, starch, etc.

The disintegrating agent can be selected from: one or more of urea, sodium sulfate, calcium sulfate, sodium bicarbonate, ammonium sulfate, magnesium chloride, sodium chloride, and the like.

The thickening agent can be selected from: one or more of acacia, xanthan gum, gelatin, polyvinyl alcohol, magnesium aluminum silicate, sodium carboxymethylcellulose and the like.

The defoaming agent can be selected from: butyl phosphate, isobutyl phosphate, n-octanol, silicone, and the like.

The antifreezing agent can be selected from: one or more selected from ethylene glycol, propylene glycol, glycerol, etc.

The stabilizing agent can be selected from: triphenyl phosphite, N-soybean oil-based trimethylene diamine, dialkyl succinate sulfonate, epichlorohydrin, butyl glycidyl ether, and the like.

The warning color can be selected from: basic rose essence, basic violet 10, basic violet 49, acid red 51, acid red 52, acid red 14, acid blue 9, acid yellow 23, basic red 10, basic red 108.

The preservative can be selected from: benzoic acid, sodium benzoate, and the like.

The pH regulator can be selected from: hydrochloric acid, sodium hexametaphosphate, sodium citrate, sodium bicarbonate, sodium hydroxide, hydrogen oxidant, triethanolamine, etc.

The filler and/or carrier may be selected from: one or more of attapulgite, diatomite, kaolin, white carbon black, bentonite, montmorillonite, calcium carbonate, zeolite, acid clay, white clay, pyrophyllite, talc, calcite, etc.

The present invention provides a method of treating a cotton plant comprising applying the plant growth regulator composition comprising flumetralin and paclobutrazol of the present invention to the foliage and tops of the cotton plant.

The present invention provides a chemical method for cotton topping comprising applying a plant growth regulator composition comprising flumetralin and paclobutrazol to cotton.

The present invention provides a chemical method for cotton topping comprising applying a plant growth regulator composition comprising flumetralin and paclobutrazol to the foliage and tops of cotton.

The invention provides a chemical method for cotton topping, which is to apply a plant growth regulator composition containing flumetralin and paclobutrazol to the top and the leaf of cotton from the first occurrence of tiny flower buds to the full-bloom stage.

The present invention also provides a method of improving the yield of a cotton plant crop and/or the quality of cotton fiber comprising applying to cotton a plant growth regulator composition comprising flumetralin and paclobutrazol.

The present invention also provides a method of improving the yield of a cotton plant crop and/or cotton fiber quality comprising applying a plant growth regulator composition comprising flumetralin and paclobutrazol to the top and foliage of cotton.

The present invention also provides a method of improving the yield of a cotton plant crop and/or cotton fiber quality, the method comprising improving the yield of a cotton plant crop by (i) diluting a concentrate of a plant growth regulator composition comprising flumetralin and paclobutrazol in a suitable carrier, such as water; (ii) applying the diluted composition to the top and foliage of cotton plants.

The rate of application of the plant growth regulator compositions of the present invention can be in a wide range. It is usually applied at 0.001kgai/ha to 4kg ai/ha, especially at 0.01kg ai/ha to 2kg ai/ha, especially at an application rate of 0.1kg ai/ha to 1kg ai/ha, especially at an application rate of 0.2kg ai/ha to 0.8kg ai/ha.

The flumetralin and paclobutrazol of the present invention may be applied simultaneously or sequentially in any order. If administered sequentially, the components may be administered in any order over a suitable time frame, e.g., no more than 1 month, no more than 1 week, or no more than 24 hours between the time the first component is administered and the time the last component is administered. Suitably, the ingredients are dosed over a period of hours. If both flumetralin and paclobutrazol are administered simultaneously, they may be administered separately or in a tank mix or in a pre-formulated mixture.

The first application of the plant growth regulator composition of the present invention to the leaves of cotton plants is from the first appearance of tiny flower buds or the first flowering to the full-bloom stage. Subsequent applications of the composition of the invention or subsequent separate applications of flumetralin or paclobutrazol may be performed as desired. If subsequent administrations are employed, the administrations are preferably separated by a period of about 10 to 21 days. The time at which buds first appear or flowers first and the time required for the first application or subsequent application of the plant growth regulator composition will vary based on a variety of factors including the area, climate, cotton variety.

The cotton variety may be a transgenic variety. Including herbicide-resistant cotton varieties, such as glyphosate-, glufosinate-or bromoxynil-resistant cotton varieties; cotton varieties tolerant to harmful insects, in particular to beetles and dipterans; cotton variety with anti-pathogenic substance and selective effect.

The key to the cotton topping effect is time and method. Premature topping, easy clustering of proud buds and heavy field shading; too late topping, increase of ineffective buds, delay boll opening and maturity, and result in poor yield and quality of cotton. The topping time is determined mainly according to the growth vigor, the soil fertility, the density, the variety of cotton plants, the accumulated temperature of the local later period, the initial frost period and other factors.

When the plant growth regulator containing the flumetralin and the paclobutrazol is applied to cotton topping, two modes of manual spraying and mechanical spraying can be adopted. Mechanical spraying is particularly preferred plant protection unmanned aerial vehicle spraying.

A plant growth regulator composition comprising flumetralin and paclobutrazol in accordance with the present invention may optionally comprise one or more additional pesticides such as insecticides, nematocides, fungicides or herbicides or additional plant growth regulators. This can further increase cotton yield and/or improve cotton fiber quality by controlling insect or nematode pests, fungal diseases and weeds.

Other active ingredients such as herbicides, other plant growth regulators, other fungicides, insecticides, acaricides and nematicides may be present in the concentrate of the present invention or may be added as a tank mix formulation of the composition of the present invention. In addition, these other active ingredients may be applied to the seed, plant locus or plant propagation material before or after application of the plant growth regulator composition of the invention.

The structural characteristics of the cotton fibers are embodied by the main quality indexes of the cotton fibers. The main influences on the spinning performance are length, fineness, maturity, micronaire value, reflectivity, yellowness and the like.

The cotton fiber is divided into length grades according to the length of the cotton fiber, and the cotton fiber is divided into seven length grades of 25-31 mm by taking 1 mm as a grade pitch.

Fiber alignment is usually expressed as an alignment higher than 90%; a degree of alignment below 80% indicates that the fibers are not aligned.

The micronaire value is a comprehensive index reflecting the fineness and maturity of cotton fibers, and the larger the numerical value, the thicker the cotton fibers are, the higher the maturity is. The value of the micronaire is divided into three grades, namely A, B and C. Grade B is the micronaire standard grade. A is high, the numerical range is 3.7-4.2; b is a standard component with a numerical range of 3.5-3.6 or 4.3-4.9; c is discount level, the value range <3.4 or > 5.0.

Compared with the prior art, the invention has at least the following beneficial effects:

the plant growth regulator composition containing the flumetralin and the paclobutrazol can play a synergistic role when being used for cotton topping, so that the cotton yield can be improved, the cotton fiber quality can be effectively improved, and the cotton production is improved.

Detailed Description

For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Formulation examples

The active components, the dispersant, the wetting agent, the water and the like are uniformly mixed according to the proportion of the formula, and the suspending agent of 25 percent of flumetralin and 25 percent of paclobutrazol is obtained after grinding and/or high-speed shearing.

Mixing the active ingredients, various auxiliary agents, fillers and the like according to the proportion of the formula, and crushing the mixture by an ultrafine crusher to obtain the wettable powder of 30 percent of flumetralin and 15 percent of paclobutrazol.

Adding active ingredient, solvent and emulsifier together, and dissolving into uniform oil phase; mixing the water-soluble component with water to obtain a water phase; and mixing the oil phase and the water phase under high-speed stirring to prepare the aqueous emulsion of 15 percent of flumetralin and 15 percent of paclobutrazol.

Mixing active ingredients, a dispersing agent, a wetting agent, a disintegrating agent and a filler uniformly according to the proportion of a formula, crushing the mixture into wettable powder through airflow, and adding a certain amount of water to mix and extrude the wettable powder; and drying and screening to obtain the water dispersible granule of 15 percent of flumetralin and 30 percent of paclobutrazol.

The active components, the dispersant, the wetting agent, the water and the like are uniformly mixed according to the proportion of the formula, and the suspending agent of 10 percent of flumetralin and 15 percent of paclobutrazol is obtained after grinding and/or high-speed shearing.

The components are mixed according to a proportion, ground and crushed to prepare the wettable powder of 30 percent of flumetralin and 10 percent of paclobutrazol.

The active components, the dispersant, the wetting agent, the water and the like are uniformly mixed according to the proportion of the formula, and the oil suspending agent of 25 percent of flumetralin and 10 percent of paclobutrazol is obtained after grinding and/or high-speed shearing.

Dissolving flumetralin and paclobutrazol in methyl oleate, and adding polystyrene to obtain an oil phase; uniformly mixing the components in the formula to obtain a water phase; adding the oil phase into the water phase under stirring to obtain the aqueous emulsion of 10 percent of flumetralin and 5 percent of paclobutrazol.

Dustless coated granules of 0.5% flumetralin + 2% paclobutrazol are obtained in this way by uniformly coating the finely ground active ingredient onto a carrier moistened with polyethylene glycol in a mixer.

Dissolving paclobutrazol in SOLVESSO^TM200, adding ethoxylated castor oil to obtain the paclobutrazol emulsifiable concentrate.

The flumetralin, the disodium fatty alcohol polyoxyethylene ether sulfosuccinate monoester and the other components are uniformly mixed according to the proportion and are sanded to prepare the suspending agent containing the flumetralin.

Adding the oil phase containing the paclobutrazol into the suspending agent containing the flumetrazol to obtain the suspending emulsion of 25 percent of flumetrazol and 10 percent of paclobutrazol

The components are mixed and stirred until a transparent homogeneous phase is obtained, and the emulsifiable concentrate of 25 percent of flumetralin and 5 percent of paclobutrazol is obtained.

Mixing the active components of flumetralin and paclobutrazol and various auxiliary agents with water, performing high-speed shearing dispersion and sanding by a sand mill to form a high-dispersion and stable suspension system to prepare a suspending agent, and drying the obtained suspension by a fluidized bed to obtain the dry suspending agent of 5% of flumetralin and 20% of paclobutrazol.

The components are prepared according to the proportion and are uniformly stirred to obtain the ultra-low volume liquid of 1.5 percent of flumetralin and 0.5 percent of paclobutrazol, and the composition is directly applied without dilution.

The components are prepared according to the proportion and are uniformly stirred to obtain the ultra-low volume liquid of 0.5 percent of flumetralin and 2 percent of paclobutrazol, and the composition is directly applied without dilution.

The proportion in the above examples is weight percent.

Evaluation of the Effect of the plant growth regulator composition of the present invention on Cotton topping in greenhouse

The cotton seeds to be tested were planted in seedling pots under greenhouse conditions. Standard soil was used as the cultivation substrate. Cotton grows in the greenhouse. When a flower is opened in cotton, the plant growth regulator is sprayed onto the cotton leaves and top, either alone or in combination. Each treatment was repeated 3 times.

Preparing a reagent according to a certain weight percentage: 1. flunomide; 2. paclobutrazol; 3. flumetralin + paclobutrazol; then, each of the reagents was diluted with water to obtain a diluted drug solution. The effect of the different treatments on the fiber quality of cotton plants was examined, and the specific results are shown in table 1.

TABLE 1

The data in table 1 show that the cotton treated by the inventive composition of flumetralin and paclobutrazol is improved by 2-3 length levels compared with the cotton treated by single flumetralin or paclobutrazol, the cotton fiber uniformity is above 90%, and the cotton micronaire value reaches A level (high level); while the cotton subjected to topping treatment by only using the flumetralin or the paclobutrazol has the cotton fiber degree of only about 80 percent and the micronaire value of only C grade.

Meanwhile, as can be seen from the data in table 1, the flumetralin and paclobutrazol can show synergistic effect when the cotton is treated by topping according to the proportion of 50:1-1: 50; furthermore, when the ratio of the cotton fiber to the cotton fiber is 5:1-1:5, the cotton fiber has more excellent effect on improving the quality of cotton fibers compared with other ratios, the length of the cotton fibers can reach 29.5%, and the uniformity of the cotton fibers can reach 95%.

Table 2 shows the effect of different treatments on cotton plant height, number of fruit branches and number of effective bolls investigated 60 days after treatment.

TABLE 2

The data in table 2 show that the cotton treated by the inventive composition of flumetralin and paclobutrazol through topping has better plant height control effect, increased single boll weight, increased effective boll number, effectively increased cotton yield and no obvious inhibition effect on fruit branch number compared with cotton treated by single flumetralin or paclobutrazol through topping. Meanwhile, as can be seen from the data in table 2, the flumetralin and paclobutrazol can show synergistic effect when the cotton is treated by topping according to the proportion of 50:1-1: 50; furthermore, when the ratio of the two is 5:1-1:5, the plant height control effect is more excellent than that under other ratios, and the plant height control effect is obviously improved in the aspects of increasing the weight of single bolls, the number of effective bolls and improving the yield of cotton.