CN116035009A - Cotton defoliation composition and cotton defoliation method using same - Google Patents

Cotton defoliation composition and cotton defoliation method using same Download PDF

Info

Publication number
CN116035009A
CN116035009A CN202310031890.1A CN202310031890A CN116035009A CN 116035009 A CN116035009 A CN 116035009A CN 202310031890 A CN202310031890 A CN 202310031890A CN 116035009 A CN116035009 A CN 116035009A
Authority
CN
China
Prior art keywords
cotton
thidiazuron
brassinolide
defoliation
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310031890.1A
Other languages
Chinese (zh)
Inventor
田晓莉
廖宝鹏
魏泽欣
李芳军
杜明伟
李召虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Agricultural University
Original Assignee
China Agricultural University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Agricultural University filed Critical China Agricultural University
Priority to CN202310031890.1A priority Critical patent/CN116035009A/en
Publication of CN116035009A publication Critical patent/CN116035009A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
    • A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
    • A01N43/22—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom rings with more than six members
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
    • A01G22/50—Cotton
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
    • 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
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P21/00—Plant growth regulators

Abstract

The invention discloses a cotton defoliation composition and a cotton defoliation method using the same. In some embodiments, the mass ratio of the brassinolide to the thidiazuron is: (0.05-0.1): (200-400). The embodiment of the invention also provides an application of the cotton defoliation composition serving as an active ingredient of the cotton defoliation preparation in agriculture. The cotton defoliation composition selects brassinosteroids and thidiazuron, and the brassinosteroids are sprayed before the thidiazuron is sprayed on cotton, or the brassinosteroids and the thidiazuron are compounded and then sprayed on leaf surfaces, so that the defoliation rate of the cotton can be remarkably improved, and the mechanical harvesting quality of the cotton is guaranteed.

Description

Cotton defoliation composition and cotton defoliation method using same
Technical Field
The invention relates to the technical field of agriculture, in particular to a cotton defoliation composition and a cotton defoliation method using the same.
Background
The mechanization degree of cotton fields is gradually improved, and the area of mechanically picked cotton is rapidly enlarged. Chemical defoliation is a key for realizing mechanical harvesting of cotton, and the unsatisfactory defoliation effect and high impurity content often cause the reduction of the harvesting efficiency of the mechanical cotton, the increase of the cleaning cost and the reduction of the fiber quality.
Thidiazuron (TDZ) is used as a main active ingredient of a defoliating agent commonly used in cotton production, and the defoliating effect is poor when the Thidiazuron (TDZ) is used alone, so that the mechanical harvesting efficiency and quality of cotton are seriously affected. In order to improve the defoliation effect, the defoliation effect of the thidiazuron can be effectively improved by compounding herbicides such as diuron and thidiazuron to form a defoliation agent preparation product. But diuron has a half-life of more than 300 days in soil, has stronger toxicity and degradation resistance, is great in harm to human health and environment, and is unfavorable for the sustainable development of the health of agriculture due to excessive use.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the related art to a certain extent, and therefore, the embodiment of the invention provides a cotton defoliation composition and a cotton defoliation method adopting the same.
In a first aspect, embodiments of the present invention provide a cotton defoliation composition comprising: brassinolide (BR) and thidiazuron are used independently or in combination.
The cotton defoliation composition provided by the embodiment of the invention selects brassinosteroids and thidiazuron, and the brassinosteroids are sprayed on the leaf surfaces before the Shi Saiben of the cotton leaf surfaces, or the brassinosteroids and the thidiazuron are compounded and then are sprayed on the leaf surfaces, so that the defoliation rate of the cotton can be obviously improved, and the mechanical harvesting quality of the cotton is ensured.
In some embodiments, the mass ratio of the brassinolide to the thidiazuron is: (0.05-0.1): (200-400).
In a second aspect, the embodiment of the invention also provides an application of the cotton defoliation composition as an active ingredient of a cotton defoliation preparation in agriculture.
In some embodiments, the cotton defoliation formulation is an agriculturally acceptable wettable powder, water dispersible granule or suspension.
In a third aspect, the embodiment of the invention also provides a cotton defoliation method, which comprises the following steps: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 15-25 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 2-4 hours.
In some embodiments, the concentration of brassinolide in the aqueous solution with brassinolide as an active ingredient is 0.05 to 0.1mg/L.
In some embodiments, the concentration of the thidiazuron in the aqueous solution with the thidiazuron as an active ingredient is 200-400 mg/L; further preferably 300mg/L.
In the process of leaf surface spraying, the spraying should be uniform, so that the front and back surfaces of all leaves of cotton plants are fully contacted with the medicament.
The embodiment of the invention also provides a cotton defoliation method, which comprises the following steps: the water solution with brassinolide and thidiazuron as active components is sprayed on the leaves 15-25 days before cotton harvesting.
In some embodiments, the concentration of brassinolide is between 0.05 and 0.1mg/L and the concentration of thidiazuron is between 200 and 400mg/L; further preferably 300mg/L.
In the process of leaf surface spraying, the spraying should be uniform, so that the front and back surfaces of all leaves of cotton plants are fully contacted with the medicament.
The invention has the advantages and beneficial effects that:
(1) The cotton defoliation composition provided by the embodiment of the invention selects brassinosteroids and thidiazuron, and the brassinosteroids are sprayed on the leaf surfaces before the thidiazuron is sprayed on the cotton leaves, or the brassinosteroids and the thidiazuron are compounded and then sprayed on the leaf surfaces, so that the defoliation rate of cotton can be obviously improved, and the mechanical harvesting quality of cotton can be ensured.
(2) The embodiment of the invention uses brassinolide as a plant hormone, can efficiently regulate various physiological processes of plants, and simultaneously is beneficial to chemical defoliation of cotton by interaction of an internal signal transduction mechanism with other plant hormones such as auxin, ethylene, cytokinin, abscisic acid and the like.
(3) The brassinolide provided by the embodiment of the invention has the characteristics of high efficiency, safety and the like as a plant regulator, is low in cost, does not generate phytotoxicity, and is harmless, environment-friendly and safe to people and animals. The combination of brassinolide and thidiazuron obviously improves the defoliation rate and has high cost performance.
Drawings
FIG. 1 is a graph showing the effect of treatment with brassinolide at various concentrations and thidiazuron at 300mg/L on defoliation rate of cotton;
fig. 2: representative cotton plant defoliation efficacy profiles for different treatment groups.
Wherein different lower case letters at the same time point after treatment indicate significant differences between treatments at P <0.05 level.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without creative efforts, based on the described embodiments of the present invention belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Abbreviations used in the examples of the present invention:
BR: brassinolide;
TDZ: thidiazuron.
In a first aspect, embodiments of the present invention provide a cotton defoliation composition comprising: brassinolide and thidiazuron used independently or in combination.
The cotton defoliation composition provided by the embodiment of the invention selects brassinosteroids and thidiazuron, and the brassinosteroids are sprayed before the thidiazuron is sprayed on cotton, or the brassinosteroids and the thidiazuron are compounded and then sprayed on leaf surfaces, so that the defoliation rate of the cotton can be obviously improved, and the mechanical harvesting quality of the cotton is ensured.
In some embodiments, the mass ratio of brassinolide to thidiazuron is: (0.05-0.1): (200-400). Non-limiting examples are: the mass ratio of brassinolide to thidiazuron can be 0.05: 200. 0.06: 200. 0.08: 200. 0.10: 200. 0.05:300. 0.06:300. 0.07:300. 0.08:300. 0.09:300. 0.1: 300. 0.05: 350. 0.08: 380. 0.08:400, etc.
In a second aspect, the embodiment of the invention also provides an application of the cotton defoliation composition as an active ingredient of a cotton defoliation preparation in agriculture.
In some embodiments, the cotton defoliation formulation is an agriculturally acceptable wettable powder, water dispersible granule or suspension. The above formulations may be prepared according to methods well known to those skilled in the art, and may be formulated according to the selection of adjuvants or fillers (carriers) required for the formulation of the above formulation, such as, without limitation, dispersing agents, wetting agents, thickening agents, freezing point depressants, antifoaming agents, disintegrants, binders, preservatives, etc., well known to those skilled in the art. Wherein:
the dispersant may be selected from: one or more of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene formaldehyde condensate sulfate, alkylbenzene sulfonate calcium salt, nekal BX (dibutyl naphthalene sulfonate), benzene sulfonic formaldehyde condensate sodium salt, fatty acid polyoxyethylene ester and ester polyoxyethylene azoxystrobin.
The wetting agent can be one or more selected from alkyl sulfate, alkyl sulfonate and naphthalene sulfonate;
the thickener can be selected from one or more of xanthan gum, polyvinyl alcohol, and polyethylene glycol.
The antifreeze agent can be selected from one or more of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, glycerol, urea and inorganic salts.
The defoamer may be selected from silicone-based defoamers.
The disintegrating agent can be one or more selected from ammonium sulfate, sodium sulfate, polyvinylpyrrolidone and bentonite.
The binder may be one or more selected from starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethylcellulose, sucrose.
The preservative may be selected from one or more of formaldehyde, benzoic acid, sodium benzoate, isothiazolinone (pinocembrol).
The filler can be one or more selected from diatomite, kaolin, talcum powder, white carbon black, attapulgite, clay, light calcium carbonate and starch.
In a third aspect, the embodiment of the invention also provides a cotton defoliation method, which comprises the following steps: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 15-25 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 2-4 hours. Non-limiting examples are: the foliar spray may be performed 15 days, 18 days, 20 days, 22 days, 23 days, 25 days, etc. before cotton harvesting. The water solution taking brassinolide as an active ingredient is sprayed firstly for 2 hours, 2.5 hours, 3 hours, 3.5 hours or 4 hours (the liquid medicine can be dried according to the situation), and then the water solution taking the thidiazuron as the active ingredient is sprayed on the leaf surface.
In some embodiments, the concentration of brassinolide in the aqueous solution with brassinolide as the active ingredient is between 0.05 and 0.1mg/L. Non-limiting examples are: the concentration of brassinolide may be 0.05mg/L, 0.06mg/L, 0.08mg/L, 0.09mg/L, 0.10mg/L, etc.
In some embodiments, the concentration of thidiazuron in the aqueous solution with thidiazuron as the active ingredient is 200-400 mg/L; further preferably 300mg/L. Non-limiting examples are: the thidiazuron concentration may be 200mg/L, 250mg/L, 280mg/L, 300mg/L, 330mg/L, 350mg/L, 400mg/L, etc.
In the process of leaf surface spraying, the spraying should be uniform, so that the front and back surfaces of all leaves of cotton plants are fully contacted with the medicament.
The embodiment of the invention also provides a cotton defoliation method, which comprises the following steps: the water solution with brassinolide and thidiazuron as active components is sprayed on the leaves 15-25 days before cotton harvesting.
In some embodiments, the concentration of brassinolide is between 0.05 and 0.1mg/L and the concentration of thidiazuron is between 200 and 400mg/L; further preferably 300mg/L.
Non-limiting examples are, for example, an aqueous solution containing brassinolide and thidiazuron as the active ingredients, the concentration of brassinolide being 0.05mg/L and the concentration of thidiazuron being 300mg/L; or the concentration of brassinolide is 0.06mg/L, and the concentration of thidiazuron is 300mg/L; or the concentration of brassinolide is 0.07mg/L, and the concentration of thidiazuron is 300mg/L; or the concentration of brassinolide is 0.08mg/L, and the concentration of thidiazuron is 350mg/L; or the concentration of brassinolide is 0.09mg/L, and the concentration of thidiazuron is 250mg/L; or the concentration of brassinolide is 0.1mg/L, the concentration of thidiazuron is 300mg/L, and the like.
In the process of leaf surface spraying, the spraying should be uniform, so that the front and back surfaces of all leaves of cotton plants are fully contacted with the medicament.
The following are non-limiting examples of the invention.
The experimental methods in the following examples, unless otherwise specified, are all conventional methods,
materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
If no special description exists, the quantitative tests in the following experimental examples are all set up in three repeated experiments, and the results are averaged.
Example 1
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.05:300.
Example 2
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.06:300.
Example 3
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.07:300.
Example 4
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.08:300.
Example 5
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.09:300.
Example 6
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.10:300.
Example 7
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.05:250.
Example 8
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.08:350.
Example 9
A cotton defoliation composition comprises brassinolide and thidiazuron as active ingredients, wherein the mass ratio of brassinolide to thidiazuron is 0.06:400.
Example 10
A cotton defoliation composition comprises brassinosteroids and thidiazuron as active ingredients, wherein the mass ratio of the brassinosteroids to the thidiazuron is 0.08:280.
The cotton defoliation composition, brassinolide and thidiazuron in examples 1-10 can be independently prepared into agricultural wettable powder, water dispersible granule or suspending agent, and during the use process, brassinolide is sprayed on leaf surfaces and Shi Saiben is sprayed on leaf surfaces. Or the brassinolide and the thidiazuron are compounded into wettable powder, water dispersible granules or suspending agents which can be applied in agriculture, and the brassinolide and the thidiazuron are sprayed on leaf surfaces in the using process.
Taking brassinolide and thidiazuron compounded in example 5 as an example, the mass ratio of brassinolide to thidiazuron is 0.09:300.
The preparation method of the wettable powder comprises the following steps: the thidiazuron and brassinolide with the purity of 98 percent are fully mixed with auxiliary agents (sodium dodecyl sulfate, sodium lignin sulfonate and kaolin), and the wettable powder is obtained after the mixture is crushed by an air flow crusher. 50% of thidiazuron, 0.015% of brassinolide, 3% of sodium dodecyl sulfate, 3% of sodium lignin sulfonate and the balance of kaolin.
The preparation method of the water dispersible granule comprises the following steps: the thidiazuron and brassinolide with the purity of 98 percent are fully mixed with auxiliary agents (sodium dodecyl sulfate, sodium lignin sulfonate, sodium sulfate, sodium carboxymethyl cellulose and kaolin), and the water dispersible granule is obtained by granulating, drying and sieving after being crushed by an air flow crusher. 50% of thidiazuron, 0.015% of brassinolide, 3% of sodium dodecyl sulfate, 3% of sodium lignin sulfonate, 3% of sodium sulfate, 0.1% of sodium carboxymethylcellulose and the balance of kaolin.
The preparation method of the suspending agent comprises the following steps: the thidiazuron and brassinolide with the purity of 98 percent are fully mixed with auxiliary agents (nekal BX, sodium lignin sulfonate, glycol, kathon, an organosilicon defoamer SAG630 and kaolin), crushed by a jet mill, and then sanded, fully mixed with xanthan gum and sheared to obtain the suspending agent. 50% of thidiazuron, 0.015% of brassinolide, 3% of nekal BX, 3% of sodium lignin sulfonate, 5% of ethylene glycol, 0.5% of kathon, 0.5% of organosilicon defoamer SAG630, 0.2% of xanthan gum and the balance of kaolin.
Example 11
A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 20 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 3 hours.
In the aqueous solution taking brassinolide as an active ingredient, the concentration of brassinolide is 0.05mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 300mg/L.
Example 12
A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 20 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 3 hours.
In the aqueous solution taking brassinolide as an active ingredient, the concentration of brassinolide is 0.08mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 300mg/L.
Example 13
A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 22 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 2.5 hours.
In the aqueous solution taking brassinolide as an active ingredient, the concentration of brassinolide is 0.09mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 300mg/L.
Example 14
A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 20 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 4 hours.
In the aqueous solution with brassinolide as an active ingredient, the concentration of brassinolide is 0.1mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 300mg/L.
Example 15
A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 20 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 3 hours.
In the water solution with brassinolide as active component, the concentration of brassinolide is 0.06mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 250mg/L.
Example 16
A method for defoliating cotton, comprising the steps of: the leaf surface is sprayed with an aqueous solution taking brassinolide as an active ingredient 23 days before cotton harvesting, and after 4 hours, the leaf surface is sprayed with an aqueous solution taking thidiazuron as an active ingredient.
In the aqueous solution taking brassinolide as an active ingredient, the concentration of brassinolide is 0.08mg/L.
In the aqueous solution taking the thidiazuron as the active ingredient, the concentration of the thidiazuron is 350mg/L.
Example 17
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 20 days before cotton harvesting. The concentration of brassinolide is 0.08mg/L, and the concentration of thidiazuron is 300mg/L.
Example 18
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 24 days before cotton harvesting. The concentration of brassinolide is 0.05mg/L, and the concentration of thidiazuron is 300mg/L.
Example 19
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 20 days before cotton harvesting. The concentration of brassinolide is 0.06mg/L, and the concentration of thidiazuron is 280mg/L.
Example 20
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 22 days before cotton harvesting. The concentration of brassinolide is 0.1mg/L, and the concentration of thidiazuron is 350mg/L.
Example 21
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 22 days before cotton harvesting. The concentration of brassinolide is 0.05mg/L, and the concentration of thidiazuron is 350mg/L.
Example 22
A method for defoliating cotton, comprising the steps of: the leaves were sprayed with an aqueous solution of brassinolide and thidiazuron as active ingredients 24 days before cotton harvesting. The concentration of brassinolide is 0.06mg/L, and the concentration of thidiazuron is 400mg/L.
Experimental example 1: plant experiment
Plant material: experiment treatment of Guoxin cotton No. 26: preparing 2, 4-epibrassinolide (BR) into aqueous solutions with the concentration of 0.01mg/L, 0.1mg/L, 1mg/L and 10mg/L respectively, and additionally arranging clear water Control (CK) and a Thidiazuron (TDZ) aqueous solution with the concentration of 300mg/L, wherein 6 treatments are respectively as follows: CK. TDZ, 0.01mg/L BR+TDZ, 0.1mg/L BR+TDZ, 1mg/L BR+TDZ, 10mg/L BR+TDZ.
The test was performed in 2022, 9 months in the Xinnong research Congress of the city of river, hebei province, 3 times repeated with a random block test design, 18 cells each of 4m×6m=24m 2 . The weather of the day of the application is clear and windless. Firstly, carrying out BR spraying on all leaves of cotton plants in a district with BR treatment by adopting a knapsack sprayer, carrying out TDZ spraying after about 4 hours, and investigating and counting defoliation rates after 7 days, 16 days and 21 days.
Each cell was marked with 6 plants, and the number of leaves in the cell was investigated before and after application, and the defoliation rate = (number of leaves before drug-number of leaves after drug)/number of leaves before drug × 100%. As shown in Table 1, the experimental results show that the BR treatment with the concentration of 0.1mg/L can effectively improve the defoliation rate, and the defoliation rate after 7 days, 16 days and 21 days after the medicine is respectively improved by 11.1%, 8.8% and 16.2% compared with TDZ which is singly used, and the defoliation rate reaches 55.7%, 59.1% and 75.4%. However, at lower or higher concentrations of BR treatment, such as 0.01mg/L, 1mg/L and 10mg/L, no significant improvement in defoliation rate was observed compared to TDZ alone, and in individual cases even the defoliation effect of TDZ was inhibited, probably because of the dose effect of BR to promote defoliation of TDZ, which only had positive effect at the appropriate concentrations.
TABLE 1 defoliation Rate of Cotton after different defoliation treatments (3 cell repetition average)
Figure SMS_1
Figure SMS_2
Experimental example 2: plant experiment
Plant material: lu cotton grinding 22
Experimental treatment: 2, 4-epibrassinolide (BR) was formulated into aqueous solutions having a concentration of 0.02mg/L, 0.05mg/L, 0.1mg/L, 0.2mg/L and 0.5mg/L, respectively, and a water solution of Thidiazuron (TDZ) of 300mg/L was additionally provided. A total of 6 treatments, respectively: TDZ, 0.02mg/L BR+TDZ, 0.05mg/L BR+TDZ, 0.1mg/L BR+TDZ, 0.2mg/L BR+TDZ and 0.5mg/L BR+TDZ.
The test was carried out in an illumination culture room of China university of agriculture at 11 months 2022, and the cotton pot culture test is adopted, the specification is that the diameter is 10 cm, the height is 8.5 cm, 2 plants are fixed in each pot, and the culture is carried out until the 6-leaf period is reached for treatment. Each treatment was 5 pots, 10 cotton plants. Firstly, carrying out BR spraying on all leaves of cotton plants which are subjected to BR treatment by adopting a sprayer, carrying out TDZ spraying after about 3 hours, and continuously observing and counting the leaf shedding situation after the pesticide. The results of defoliation rate= (number of pre-drug leaves-number of post-drug leaves)/number of pre-drug leaves 100% are shown in fig. 1, and a representative cotton plant defoliation effect graph is shown in fig. 2. Experimental results show that the BR treatment of 0.05mg/L and 0.1mg/L can effectively improve the defoliation rate, and compared with TDZ which is singly used, the defoliation rate after 6-8 days of medicine is obviously improved. The defoliation rate of 0.05 and 0.1mg/L BR treatment after the traditional Chinese medicine is improved by 4.2 percent and 13.9 percent respectively compared with that of TDZ treatment alone, and the defoliation rate reaches 86.1 percent and 95.8 percent. However, when the BR concentration is lower, such as 0.02mg/L or higher, such as 0.2mg/L and 0.5mg/L, the defoliation effect of the TDZ can not be obviously improved, and even when the defoliation rate is lower than the TDZ at partial time points after treatment, the dosage effect of BR exists when the defoliation effect of the TDZ is enhanced, and the effect can not be exerted due to improper concentration.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A cotton defoliation composition, comprising: brassinolide and thidiazuron used independently or in combination.
2. The cotton defoliation composition according to claim 1, wherein the mass ratio of brassinosteroids to thidiazuron is (0.05-0.1): (200-400).
3. Use of the cotton defoliation composition according to claim 1 or 2 as an active ingredient of a cotton defoliation formulation in agriculture.
4. The use according to claim 3, wherein the cotton defoliation formulation is an agriculturally acceptable wettable powder, water dispersible granule or suspension.
5. A method for defoliating cotton, comprising the steps of: the water solution taking brassinolide as an active ingredient is sprayed on the leaf surface 15-25 days before cotton harvesting, and the water solution taking thidiazuron as an active ingredient is sprayed on the leaf surface after 2-4 hours.
6. The method for defoliating cotton according to claim 5, wherein the concentration of brassinolide in the aqueous solution containing brassinolide as an active ingredient is 0.05-0.1 mg/L.
7. The method for defoliating cotton according to claim 5 or 6, wherein the concentration of thidiazuron in the aqueous solution containing thidiazuron as an active ingredient is 200-400 mg/L.
8. The method of defoliating cotton according to claim 7, wherein said thidiazuron is present in a concentration of 300mg/L.
9. A method for defoliating cotton, comprising the steps of: the leaf surface is sprayed with the aqueous solution of the brassinosteroid and the thidiazuron as the active ingredients 15 to 25 days before cotton harvesting.
10. The method for defoliating cotton according to claim 9, wherein the concentration of brassinolide is 0.05-0.1 mg/L and the concentration of thidiazuron is 200-400 mg/L.
CN202310031890.1A 2023-01-10 2023-01-10 Cotton defoliation composition and cotton defoliation method using same Pending CN116035009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310031890.1A CN116035009A (en) 2023-01-10 2023-01-10 Cotton defoliation composition and cotton defoliation method using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310031890.1A CN116035009A (en) 2023-01-10 2023-01-10 Cotton defoliation composition and cotton defoliation method using same

Publications (1)

Publication Number Publication Date
CN116035009A true CN116035009A (en) 2023-05-02

Family

ID=86132726

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310031890.1A Pending CN116035009A (en) 2023-01-10 2023-01-10 Cotton defoliation composition and cotton defoliation method using same

Country Status (1)

Country Link
CN (1) CN116035009A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105660671A (en) * 2016-03-31 2016-06-15 广东中迅农科股份有限公司 Pesticide composition containing thidiazuron and brassinolide
US20180325115A1 (en) * 2015-11-17 2018-11-15 Jiangsu Huifeng Bio Agriculture Co., Ltd. Plant growth regulator compostion having synergistic effect
CN111972425A (en) * 2020-09-07 2020-11-24 安徽省四达农药化工有限公司 Thidiazuron single agent, thidiazuron and brassinolide compound composition and preparation process thereof
CN114916549A (en) * 2021-07-30 2022-08-19 山东仕邦农化有限公司 Plant growth regulating composition, preparation and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180325115A1 (en) * 2015-11-17 2018-11-15 Jiangsu Huifeng Bio Agriculture Co., Ltd. Plant growth regulator compostion having synergistic effect
CN105660671A (en) * 2016-03-31 2016-06-15 广东中迅农科股份有限公司 Pesticide composition containing thidiazuron and brassinolide
CN111972425A (en) * 2020-09-07 2020-11-24 安徽省四达农药化工有限公司 Thidiazuron single agent, thidiazuron and brassinolide compound composition and preparation process thereof
CN114916549A (en) * 2021-07-30 2022-08-19 山东仕邦农化有限公司 Plant growth regulating composition, preparation and application thereof

Similar Documents

Publication Publication Date Title
CN101999356B (en) Sterilization composition containing fluopicolide and metalaxyl and application thereof
CN102524272B (en) Weeding combination
CN110463717A (en) Cotton defoliation ripening composition and cotton defoliation ripening agent
CN109673657B (en) Composite synergistic defoliation ripener and application thereof
CN116035009A (en) Cotton defoliation composition and cotton defoliation method using same
CN105394056A (en) Pesticide composition containing benziothiazolinone and tetramycin
CN114052037B (en) Acaricidal composition containing bistrifluron and etoxazole and application thereof
CN105475285A (en) Pesticide composition containing kasugamycin and ningnanmycin
CN110547295B (en) Moss prevention and treatment agent and application thereof
CN103340208B (en) The Herbicidal combinations of a kind of Han You oxaziclomefone and pyrazosulfuron
CN102599168A (en) Pesticide composition containing Tolfenpyrad and Envidor
CN111011391A (en) Composite insecticidal composition and application thereof
CN112120023B (en) Barrel-mixing type acaricidal synergist and application thereof
CN108378037A (en) A kind of miticide composition containing fluazinam and flufenzine
CN102550583A (en) Herbicidal combination for paddy fields
CN116369328B (en) Mite-killing composition containing azocyclotin and application thereof
CN114586789B (en) Mite-killing composition and application thereof
CN117063928A (en) Mite-killing composition and application thereof
CN110973138B (en) Pesticide composition of fluazinam and mineral oil
CN117598317A (en) Pesticide composition and application thereof
CN108782576A (en) Pesticide sterilizing composite containing captan and fluoxastrobin
CN117546860A (en) Weeding composition
CN117770263A (en) Mite-killing composition and application thereof
CN117256622A (en) Compound herbicide containing glufosinate-ammonium
CN105284811A (en) Bactericidal composition containing fluopyram and applications thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination