CN1190134C - Plant growth regulating composition capable of preventing seed ear from sprouting - Google Patents

Abstract

The present invention discloses a plant growth regulating composition which, in addition to conventional inert processing aids, contains as active ingredients the following combination: A) natural abscisic acid and B) ripening sulfur. In addition, at least one herbicide of component C) is included.

Description

A plant growth regulating composition capable of preventing grain ear bud germination

technical field

The invention relates to a plant growth regulating composition containing natural abscisic acid capable of inhibiting ear germination, and the international classification number belongs to A01N37/06.

Background technique

Natural abscisic acid, S-Abscisic acid (S-ABA), common name of pesticide: S-abscisin. Molecular formula: C ₁₅ H ₂₀ O ₁ , chemical name: 5-(1'-hydroxy-2',6',6'-trimethyl-4'-oxo-2'-cyclohexene-1'- base)-3-methyl-2-cis-4-trans-pentadienoic acid, the chemical structure is as follows

       

Chemical structure of S-ABA

In 1963, abscisic acid was first extracted from young cotton fruit by Addicott et al. For more than 30 years, scientists from various countries have conducted extensive and in-depth research on the physiological activities of plants. Studies have shown that abscisic acid is the "stress-resistance inducing factor" and "balanced growth factor" of plants, and it can initiate the expression of plant stress-resistant genes. , activate the plant's endogenous immune system, induce plant resistance to biotic and abiotic stress (drought, low temperature, saline-alkali, pests and diseases), improve the ability of plants to resist drought, cold, disease and saline-alkali, and can be widely used in Agriculture, forestry and animal husbandry, landscaping, ecological vegetation restoration and other fields.

Ripening sulfur is also known as dimethipin (Dimethipin), for example disclosed in Liu Chengrong's "Taiwan Agricultural Exploration" 1998 (4) 19-20: the use method of dimethipin plant growth regulator; "Dictionary" 1999.10, 1st edition, Foreign Languages Publishing House described that thiacetin can defoliate cotton, seedlings, rubber trees, and vines, and can also promote fruit ripening and reduce the water content of flax, rape, rice, and sunflower seeds when harvested.

Grain ear buds of cereals, such as ear germination of hybrid rice seed production, refers to the high temperature and high humidity climate before harvest, which induces grains to germinate on the ear, resulting in inactivation of seeds. At present, there are no effective prevention methods and control measures, which bring great losses to the seed industry every year. In the milky or yellow ripening stage of cereal crops, although S-ABA (70-200ppm) alone can be used to prevent grain ear buds of gramineous plants, such as hybrid rice ear germination and wheat ear germination, the amount of S-ABA is too large. Agricultural production costs are high.

In addition, it is reported that a small amount of herbicides such as glyphosate, alachlor, and butachlor have certain inhibitory effects on seed germination.

Contents of the invention

The object of the present invention is to provide a plant growth regulating composition containing natural abscisic acid capable of preventing ear buds of cereal crops, characterized in that the composition includes A) natural abscisic acid and B) ripening sulfur.

The plant growth regulating composition according to the invention may also contain component C) at least one herbicide.

Surprisingly, the S-ABA of the present invention and ripening sulfur and the combination of adding herbicides on the basis of the addition of the growth regulating activity of crops are more than expected, mainly because on the one hand, each component has been improved. On the other hand, the application concentration of natural abscisic acid and other plant growth regulators is reduced, and the plant growth regulation combination also obtains a good level of plant growth regulation under the condition that the single compound is lower than the effective concentration. Therefore, this compound use can greatly reduce the consumption of S-ABA, save costs, prevent ear germination more effectively, and improve the yield and quality of cereal crop seeds.

The various herbicides in the present invention are known, and are described in, for example, "New Pesticide Handbook" Institute of Pesticide Control, Ministry of Agriculture, Agricultural Press, 1989; "New Pesticide Handbook" (sequel), Ministry of Agriculture Pesticides Inspection Institute, Agricultural Press, 1998; "New English-Chinese Pesticide Dictionary", edited by Hu Xiaoxing, Foreign Languages Press, 1999; "Handbook of New Foreign Pesticide Varieties", edited by Sha Jiajun and others, Chemical Press, mid-1992, available Examples mentioned include: acetochlor, acifluorfen, aclofen, alachlor, dimethon, ametryn, metolachlor, sulfuron-methyl, saprofen, sultrapyr, Atrazine, pyridinium, rimsulfuron-methyl, BAS-662H, grass-cutling, furazone, bensulfuron-methyl, thiazopine, benzobicyclon, pyrazolodone, cilantrophen, bialaphos, Carboxyben, bispyribac, bromobutyramide, bromphenoxim, bromoxynil, butachlor, butoxycyclone, butachlor, benzoconazole, quinoxazone, bisamide, fluoride Metofen, methoxypyrrofen, chlorpyramid, chlorpyramid, chlorimuron-methyl, chlorsulfuron, chlorotoluron, cinidon(-ethyl), cycloheptafen, ether sulfuron, clefoxydim , clethodim, clodinac, clomazone, chloroformamide, clopyralid, clopyrasulfuron(-methyl), sulfamethazine, cumyluron, cyanazine, cybutryne, cyclopyramid, cyprosulfone Long, cycloxydone, cyhalofop-methyl, 2,4-D, 2,4-D-butyric acid, 2,4-D-propionic acid, beetan, oat enemy, dicamba, diclofop, sulfasulfuramide, Acetochlor, wild swallow, diflufenamide, diflupyrone, oxazolone, dimethoxam, amethene, dimethenamid, dimexyflam, dimethoxam, Dibenzamide, Diquat, Dithiopyr, Diuron, Diuron, Epoprodan, Promethazone (EPTC), Pentrapyr, Ethylenefluran, Ethametsulfuron, Ethoxyfur Grass yellow, ethoxyfen, ethoxysulfuron-methyl, ethyl benzoyl, fenoxaprop-ethyl, fentrazamide, wheat straw fluoride isopropyl ester, wheat straw fluoride isopropyl ester-L, wheat straw fluoromethyl ester, sulfaprop-methyl, florasulam , fluazifop-methyl, fluazolate, flucarbazone, flufenacet, fluoxazone, flufenoxalic acid, flumipropyn, flumipropyn, flumesulfame, fluuron, fluroxazone, fluoxazone Ether, flumitrazone, flupropacil, flurpyrsulfuron (-methyl, -sodium), fluorenbutyl ester, chlorpyridone, fluroxypyroxyacetic acid, fluoropyrimidol, furazone, flurpyrsulfuron, thiazolamide, fluorine Sulfafen, glufosinate, glyphosate, glyphosate isopropylamine salt, flunizamide, haloxyfop-pyl, haloxyfop-p-ethyl, hexazinone, imazazone, imazamethapyr, imazamox Acid, imazapic, imazethapyr, imazaquinac, imazethapyr, imazosulfuron, iodosulfuron(-methyl, sodium), ioxynil, isopramid, isoprofen, isoxuron, isopropan, isoxachlortole, isoflurane, clomafen, lactofen, cyclopyridine, liguron, 2-methyl-4-chlor, 2-methyl-4-chlorobutyric acid, mesotrione, mesotrione, benzotrione, Metrafentram, Mebenthiuron, Pyranuron, Bromuron, (α-)Metolachlor, Sulfenpyramid, Methoxuron, Metrizone, Mesulfuron, Mopropen, Lvgulong, naproxen, napropamide, grassbulong, nicosulfuron, fluoxamine, pingcaodan, amisulfame, proparfenpyr, oxadiazole, cyprosulfuron, chlorazine Grass, oxyfluorfen, paraquat, pelargonic acid, pendimethalin, pendralin, tebufenpyr, betainin, picolinafon, phenazofos, pretilachlor, flurisulfuron-methyl, promethazone, toxachlor, Propannil, oxalic acid, propachlor, fenpyramid, procarbazone, flusulfuron-methyl, fenfenfen-ethyl, pyrazolate, pyrazosulfuron-methyl, benzamconazole, pyribenzoxim, barnyardgrass, daphnia Grass special, pyrimidine grass, pyrimidin, quinclorac, quinclorac, algaquinone, quizalofop-p-ethyl, quizalofosyl ester, rimsulfuron-methyl, sethenoxydine, simazine, West grass net, sulcotrione, sulfentrazone, metsulfuron-methyl, glufosin, ethisulfuron, forage amine, buthiuron, tepraloxydim, terbuthine, terbuthine, dimethenamid, thiafluamide, thiazolone Acid, thiadiazolamide, thifensulfuron-methyl, grass-carb, fensulfur, trimethylbenzotrione, mecamba, tribesulfuron-methyl, tribenuron-methyl, clopyroxyacetic acid, imazacycline, trifluralin, trifloxysulfuron, flusulfasulfuron, and tritosulfuron. Preferred are glyphosate, alachlor, acetochlor, butachlor, and propachlor.

Generally speaking, the use concentration of S-ABA in the composition of the present invention is: 1.0-1000ppm, preferably 1.0-100ppm, most preferably 1.0-40.0ppm; the use amount of ripening sulfur is: 49% water suspension 0.001-1.5 liters/ha , preferably: 0.01-1.0 liter/ha, most preferably 0.1-0.5 liter/ha; herbicide dosage: 10% water spray 0.001-3.0 liter/ha, preferably 0.01-1.0 liter/ha, most preferably 0.1-0.5 liter /ha.

Usually, in the composition of the present invention, S-ABA: the ratio (weight ratio) of ripening sulfur is 1: 0.00001-10; ratio) is 1:0.00001-10:0.000001-1, preferably 1:0.0001-1:0.00001-0.1.

The plant growth regulating composition containing natural abscisic acid of the present invention can be applied to various cereal crops, including rice, wheat, barley, oats, sorghum, millet, etc., wherein rice, wheat, and corn are preferred. Spray or drench the whole plant foliage or seedlings at the milky or yellow ripening stage of cereal crops or 7-15 days before harvest.

In addition, the plant growth regulating composition of the present invention can also be applied to various pasture grasses, and examples that can be mentioned include Fescue: Fescue, Fescue furrow, Fescue fringe, Fescue trifoliate, Fescue three kingdoms, Ara Set of fescue; Stipa genus: Stipa, Stipa sand, Stipa Gobi, Stipa purple, Stipa northwest, Stipa Kunlun, Stipa Tianshan, Stipa xinjiang, Stipa falcipa, Stipa breviflora, Stipa chinensis, Stipa orientalis, Stipa spp.; Poa annua: Poa adenoides, Poa kunlun, Bluegrass meadows, Siberian bluegrass, Bluegrass spp., Woodland bluegrass, Bluegrass supine, Bluegrass alpine Grass grass, fescue-like bluegrass, Xinjiang bluegrass; Agrogenus: wheatgrass, sand reedgrass; Broomgrass: squirrel grass, big scorpion grass, false reed scorpion grass, suspicious scorpion grass; lyssica Genus: Layweed, large Layweed, multi-branched Layweed, Layweed with hairy ears, large medicine Layweed, white sheep grass; Silver Spikes: Silver Spikes; Achnatherum: Achnatherum splendens; Dayton barley, awnless brome, alpine yellow grass, bran grass, Alxa goose view grass, pinnate three miscanthus, duck grass, small roe grass, bermudagrass, etc.

The application rate can vary within a rather wide range and depends on the type of application (foliar spray, smear, root irrigation, seed dressing, injection, etc.), the species of the cultivated plant, the growth period of the plant, climatic conditions and other factors. In general, the compositions according to the invention are applied at a rate of from 0.01 to 2.50 kg active ingredient/ha. Generally speaking, the application dose of the plant growth regulating composition is not critical, but the key point is that the concentration of abscisic acid should be kept at 1.0-1000ppm.

The plant growth regulating composition of the present invention adopts conventional preparation forms when used. They are processed in a conventional manner, using the adjuvants usually employed in formulation technology, for example into emulsifiable concentrates, directly sprayable or dilutable solutions, dilutable emulsions, wettable powders, soluble powders, powders, granules or microcapsules . Appropriate to the type of composition, the method of application - such as spraying, misting, dusting, wetting, spreading or pouring - is selected according to the intended purpose and prevailing circumstances.

The formulations are prepared in known manner, for example by homogeneously admixing and/or grinding the plant growth regulator with said adjuvants, typically solvents or solid carriers. Surfactants can additionally be used to prepare the formulations.

Examples of solvents and solid carriers are described in the second edition of "Pesticide Formulation Processing Technology" edited by Liu Bulin (Chemical Industry Press, 1998).

Depending on the plant growth regulator to be processed, suitable surface-active compounds are nonionic, cationic, anionic and/or amphoteric surfactants and surfactant mixtures having good emulsifying, dispersing and wetting properties.

Examples of suitable nonionic, cationic, anionic and/or amphoteric surfactants are listed in the third chapter of "Pesticide Formulation Processing Technology" edited by Liu Bulin, second edition (Chemical Industry Press, 1998).

The plant growth composition generally contains 0.1% to 99.0% by weight, preferably 0.1% to 95.0% by weight of abscisic acid and ripening sulfur and component C, 1.0% to 99.9% by weight of solid or liquid processing aids and 0 to 25.0% by weight, preferably 0.1 to 25.0% by weight of surfactant.

A particularly preferred formulation consists of the following:

(% = percent by weight)

Crème:

Active ingredient 1% to 90%, preferably 5% to 20%

Surfactant 1% to 30%, preferably 10% to 20%

Liquid carrier 5% to 94%, preferably 70% to 85%

powder:

Active ingredient 0.1% to 10%, preferably 0.1% to 5%

Solid carrier 99.9% to 90%, preferably 99.9% to 99%

Suspending agent:

Active ingredient 5% to 75%, preferably 10% to 50%

Water 94% to 24%, preferably 88% to 30%

Surfactant 1% to 40%, preferably 2% to 30%

Wettable powder:

Active ingredient 0.5% to 90%, preferably 1% to 80%

Surfactant 0.5% to 20%, preferably 1% to 15%

Liquid carrier 5% to 95%, preferably 15% to 90%

Granules:

Active ingredient 0.1% to 30%, preferably 0.1% to 15%

Solid carrier 99.5% to 70%, preferably 97% to 85%

The invention is illustrated by the following non-limiting examples:

1. Emulsion A) B) C) D)

Active ingredient 5% 10% 25% 50%

Calcium dodecylbenzenesulfonate 6% 8% 6% 8%

Polyethoxylated castor oil

(36 moles EO) 4% - 4% 4%

Octylphenol polyethoxy

Compound (7 mole EO) - 4% - 2%

Cyclohexanone - - - - 10% 20%

Aromatic mixture C ₉ -C ₁₂ 85% 78% 55% 15%

Any desired emulsions can be prepared by diluting said emulsifiable concentrates with water.

2. Wettable powder A) B) C) D)

Active ingredient 5% 25% 50% 80%

Sodium lignosulfonate 4% - 3% -

Sodium Lauryl Sulfate 2% 3% - 4%

Sodium Diisobutyl Naphthalene Sulfonate - 6% 5% 6%

Octylphenol polyethoxy

Compound (7-8 mole EO) - 1% 2% -

Highly dispersed silicic acid 1% 3% 5% 10%

Kaolin 88% 62% 35% -

The active ingredient is intimately mixed with the auxiliaries and the resulting mixture is ground in a suitable mill to obtain a wettable powder which can be diluted with water to give a suspension of any desired concentration.

3. Coating granules A) B) C)

Active ingredient 0.1% 5% 15%

Highly dispersed silicic acid 0.9% 2% 2%

Inorganic carrier (Φ0.1-1mm) 99.0% 93% 83%

such as calcium carbonate or silica

The active ingredient is dissolved in N-pyrrolidone, and the solution is sprayed onto the carrier, and the solvent is removed by vacuum drying.

4. Coating granules A) B) C)

Active ingredient 0.1% 5% 15%

Polyethylene glycol (MW200) 1.0% 2% 3%

Highly dispersed silicic acid 0.9% 1% 2%

Inorganic carrier (Φ0.1-1mm) 98.0% 92% 80%

such as calcium carbonate or silica

Dust-free powders are obtained by applying the finely ground active ingredient homogeneously in a mixer to a carrier moistened with polyethylene glycol.

5. Extruded granules A) B) C) D)

Active ingredient 1% 3% 5% 15%

Sodium lignosulfonate 1.5% 2% 3% 4%

Carboxymethylcellulose 1.4% 2% 2% 2%

Kaolin 97.0% 93% 90% 79%

The active ingredients are mixed and ground together with auxiliaries, the mixture is moistened with water, the above mixture is extruded and then dried under airflow.

6. Powder A) B) C)

Active ingredient 0.1% 1% 5%

Talc or Chalk 39.9% 49% 35%

Kaolin 60.0% 50% 60%

Ready-to-use powders are obtained by mixing the active ingredient with a carrier and grinding in a suitable mill.

7. Suspending agent A) B) C) D)

Active ingredient 3% 10% 25% 50%

Ethylene Glycol 5% 5% 5% 5%

Nonylphenol polyethoxylate

Compound (15 moles EO) - 1% 2% -

Sodium Lignosulfonate 3% 3% 4% 5%

Carboxymethylcellulose 1% 1% 1% 1%

37% formaldehyde solution 0.2% 0.2% 0.2% 0.2%

Silicone oil emulsion 0.8% 0.8% 0.8% 0.8%

Water 87% 79% 62% 38%

The finely ground active substance is mixed thoroughly with the auxiliaries. Suspension concentrates are obtained in this way and can be diluted with water to prepare suspensions of any desired concentration.

It is often convenient to process the abscisic acid and the ripening sulfur and the herbicide of component C) separately and mix them in the desired mixing ratio by the user before use and apply them as a "tank mix".

The components can be applied simultaneously or separately and sequentially; when applied separately, the order of application usually does not affect the effect.

In general, it is critical that the natural abscisic acid concentration at the time of application be maintained at 1.0-1000 ppm, preferably 1.0-100 ppm, most preferably 1.0-40.0 ppm.

Application example

Embodiment 1: rice bud suppression test

At the stage of rice grain milk maturity or yellow maturity or 7-25 days before harvest, the plant growth regulating composition of the present invention is used to spray the ears or the whole plant once to measure the ear bud percentage of rice.

               Table 1 Experiments on the effect of inhibiting different types of rice panicle buds

Note: SABA is natural abscisic acid (+)-Abscisic Acid, concentration unit: ppm;

The heat-promoting sulfur is 49% water suspension concentrate, concentration unit: liter/ha

Glyphosate is 10% water solution, concentration unit: liter/ha

The result shows that after applying the plant growth regulating composition of the present invention, the panicle germination rate of rice grains is significantly reduced.

Embodiment 2: wheat germ suppression test

At the stage of wheat grain milk maturity or yellow maturity, apply the plant growth regulating composition of the present invention to spray treatment on individual wheat ears or the whole plant once, and measure the percentage of ear buds.

                                                                   

Note: SABA is natural abscisic acid (+)-Abscisic Acid, concentration unit: ppm;

Ripening sulfur is 49% water suspension, concentration unit: liter/ha

Glyphosate is 10% water solution, concentration unit: liter/ha

The results showed that after applying the plant growth regulating composition of the present invention, the percentage of ear buds of wheat decreased significantly.

Embodiment 3: Grass bud suppression test

At the stage of milky or yellow ripening of pasture grains or 7-15 days before harvest, apply the plant growth regulating composition of the present invention to spray the ear or the whole plant once, and measure the ear bud rate.

             Table 3 Experiments on the effect of inhibiting pasture ear buds

Note: SABA is natural abscisic acid (+)-Abscisic Acid, concentration unit: ppm;

Ripening sulfur is 49% water suspension, concentration unit: liter/ha

Glyphosate is 10% water solution, concentration unit: liter/ha

The results show that after the plant growth regulating composition of the present invention is applied, the ear germination rate of forage grass is significantly reduced.

Claims (6)

1. A plant growth regulating composition comprising, in addition to conventional inert processing aids, the following combination as active ingredients: A) natural abscisic acid, B) ripening sulfur and C) at least one herbicide, wherein the group The weight ratio of parts A):B):C) is 1:0.00001-10:0.000001-1. 2. The plant growth regulating composition according to claim 1, wherein the weight ratio of components A):B):C) is 1:0.0001-1:0.00001-0.1. 3. The plant growth regulating composition according to claim 1, wherein the herbicide is at least one of glyphosate, alachlor, acetochlor or butachlor. 4. The plant growth regulating composition according to claim 3, wherein the herbicide is glyphosate. 5. Use of the plant growth regulating composition according to any one of claims 1-4 on cereal crops and pastures. 6. The use according to claim 5, wherein the cereal crops are rice, wheat and corn.