Crop growth regulator containing flumetralin and prohexadione calcium and application thereof

Abstract

The invention relates to a crop growth regulator containing flumetralin and prohexadione calcium. The crop growth regulator is formed by compounding effective components of flumetralin and prohexadione calcium. The mass ratio of flumetralin to prohexadione calcium is (20-35): 3. The crop growth regulator containing flumetralin and prohexadione calcium is applied to the growth period of corn, can effectively regulate the growth of corn, can effectively increase the plant height of corn, improve the plant height in the harvesting period, can significantly increase the stem diameter, the ear height, the ear number and the thousand seed weight of corn in the harvesting period, improves the agronomic traits of corn, and improves the yield of corn. Therefore, the corn yield and the corn quality are remarkably improved, and the economic benefits of corn can be effectively improved in the later period.

Description

Technical Field

[0001] The invention belongs to the technical field of crop growth regulators and crop growth control, and in particular relates to a crop growth regulator containing fluomethionine and prohexadione-calcium and application thereof. Background Art

[0002] my country began to introduce corn in the mid-16th century. The annual corn production in the Northeast Plain of my country is as high as 90% of the total corn production in my country. According to statistics, there are currently 24 provinces, cities, and autonomous regions in my country that are planting corn, and they are produced all year round. In the mid-to-late 1990s, due to the continuous expansion of export volume, my country's agriculture entered a new stage, and the trend of supply exceeding demand gradually formed. How to further expand my country's corn production in a short period of time has become a problem that must be solved as soon as possible in agricultural development. In 2023, my country's total corn production has reached 577.68 billion jin, but it is far from meeting the demand for growth. Under the condition that the sown area is fixed and cannot be expanded, it has become a top priority to study how to increase the yield per unit area of ​​corn.

[0003] Flumetralin is a contact and local systemic dinitroaniline plant growth regulator that inhibits lateral bud growth. It is an excellent bud inhibitor with rapid action and fast absorption. It is effective as long as there is no rain 2 hours after application, and it is convenient to apply in the rainy season. The agent will not cause phytotoxicity when it contacts fully extended leaves, and it does not contain harmful residues. As a novel plant growth regulator, prohexadione calcium has the advantages of being environmentally friendly, low in residue, high in efficiency and low in toxicity compared to triazole compounds. It was first developed by Kuiba Chemical Industries, Ltd. of Japan. The mechanism of action of prohexadione calcium is to inhibit the 3β-hydroxylation process of GA20 to GA1 in gibberellin synthesis, thereby reducing the level of gibberellins in crops and achieving the purpose of slowing plant growth and development. The metabolism of prohexadione calcium in animals such as rats, chickens and goats shows that it is excreted through urine and feces after entering the body, and prohexadione calcium is applied to plants and eventually degraded into natural products.

[0004] Therefore, it is of great significance to explore the compounding of flumetralin and prohexadione-calcium in improving corn yield, quality and agronomic traits. At present, there is no report on the related research on the compounding of flumetralin and prohexadione-calcium on corn yield. Based on this, this application was developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a crop growth regulator containing fluomethionine and prohexadione-calcium. After applying the crop growth regulator to corn, the corn yield is significantly increased and the quality is significantly improved.

[0006] The present invention also provides the use of the crop growth regulator containing fluomethionine and prohexadione-calcium in promoting crop growth, especially in regulating corn growth, which can improve the quality and yield of corn.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A crop growth regulator containing flumetralin and prohexadione-calcium, wherein the crop growth regulator is composed of a compound of the effective ingredients flumetralin and prohexadione-calcium.

[0009] The crop growth regulator containing flumetralin and prohexadione-calcium may specifically have a mass ratio of flumetralin to prohexadione-calcium of 20-35:3. Furthermore, the mass ratio of flumetralin to prohexadione-calcium may be 25-30:3, and more preferably 27:3.

[0010] The crop growth regulator containing fluomethionine and prohexadione-calcium of the present invention can be made into a dosage form allowed by pesticides from active ingredients and adjuvants, and the dosage form includes but is not limited to wettable powder, soluble powder, water-dispersible granules, suspension, emulsifiable concentrate, water emulsion, microemulsion or microcapsule, etc., and the preferred dosage form is suspension. The adjuvant can be selected from one or more of carriers, solvents, dispersants, wetting agents, adhesives, thickeners, defoamers, preservatives, antifreeze agents, fillers, adhesives, surfactants and fertilizers. The crop growth regulator of the present invention can be applied with only the active ingredients, or it can be mixed with adjuvants for application.

[0011] The crop growth regulator containing flumetralin and prohexadione-calcium of the present invention has a total content of active ingredients (i.e. the total content of flumetralin and prohexadione-calcium) of 23-38% of the total weight of the crop growth regulator, more preferably 28-33%, and most preferably 30%.

[0012] The present invention also provides a preferred formula of a crop growth regulator containing flumetralin and prohexadione-calcium, which is composed of the following raw materials in percentage by weight: 20-35% of flumetralin, 3% of prohexadione-calcium, 3-7% of styrylphenyl polyoxyethylene ether, 8-15% of nonylphenol polyoxyethylene ether, 0.1-0.4% of xanthan gum, 0.1-0.3% of carboxymethyl cellulose, 0.5-1.0% of polysiloxane, 0.2-0.5% of higher alcohol, 0.4-0.7% of sodium benzoate, 2-5% of ethylene glycol, 1-3% of propylene glycol, and the balance is deionized water.

[0013] The present invention also provides the use of the crop growth regulator containing fluomethionine and prohexadione-calcium in regulating corn growth. In specific application, the crop growth regulator can be applied during the growth period of corn, preferably, during the seedling stage and the large trumpet stage of corn, each application is once, a total of 2 times. For example, the crop growth regulator can be diluted with water to a liquid with a total concentration of active ingredients of 0.075-0.3 mg / L, and sprayed on the aboveground stems and leaves of corn during the seedling stage and the large trumpet stage of corn.

[0014] Specifically, when a crop growth regulator containing fluomethionine and prohexadione-calcium is used to regulate the growth of corn, the crop growth regulator can effectively increase the plant height of corn, improve the plant height during the harvest period, and can significantly increase the stem diameter, ear height, number of grains per ear and thousand-grain weight of corn during the harvest period, improve the agronomic traits of corn, thereby significantly increasing the corn yield and corn quality, and can effectively improve the economic benefits of corn in the later stage.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The invention provides a crop growth regulator comprising flumetralin and prohexadione-calcium. The crop growth regulator comprising flumetralin and prohexadione-calcium is applied to corn during its growth period, can effectively regulate the growth of corn, can effectively increase the plant height of corn, improve the plant height during the harvest period, can significantly increase the stem diameter, ear height, number of grains per ear and thousand-grain weight of corn during the harvest period, improve the agronomic traits of corn, thereby significantly increasing the corn yield and corn quality, and can effectively increase the economic benefits of corn in the later stage. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the embodiments, but the protection scope of the present invention is not limited thereto.

[0018] Growth regulating effect of crop growth regulators containing flumetralin and prohexadione-calcium on corn.

[0019] 1. Purpose of the test

[0020] It is clear that the suspension concentrate containing fluomethionine and calcium cyclohexadione can effectively increase corn yield, improve corn agronomic traits, improve corn quality, and increase economic benefits.

[0021] 2. Test Content

[0022] 1 Experimental materials and reagents

[0023] 1.1 Test materials

[0024] Corn (Ganyu 170).

[0025] 1.2 Test Agents

[0026] Table 1 Experimental drug information

[0027]

[0028] Table 2 Comparative drug information

[0029] Chinese name Dosage form and content Production Unit Flumetholone 25% SC Zhengzhou Zhengshi Chemical Products Co., Ltd. Prohexadione calcium 10% SC Shandong Yueming Biotechnology Co., Ltd.

[0030] Table 3 Suspension agent weight percentage information

[0031]

[0032]

[0033] Polysiloxane was purchased from Shangyu Haili Chemical Co., Ltd., a high-efficiency polysiloxane with product model AD.

[0034] Higher alcohol, common commercial product, purchased from Chuanzheng Chemical; model: industrial grade. Higher alcohol is a mixture of monohydric alcohols, mainly containing hexadecanol and octadecyl alcohol, of which octadecyl alcohol and hexadecanol account for 50%-70% and 20%-35% of hexadecanol. Hexadecanol and octadecyl alcohol together account for 90% of the total mixture, and the rest is tetradecyl alcohol.

[0035] 2 Test methods

[0036] 2.1 Experimental design

[0037] 2.1.1 Preparation of medicine

[0038] Weigh 0.1020g of flumetralin technical drug and 0.1020g of prohexadione calcium technical drug, mix the technical drug, adjuvant (wetting dispersant, defoamer, preservative, antifreeze agent) and filler deionized water according to the proportion in Table 3, stir evenly and perform high-speed shearing, then grind by colloid mill, and finally grind by sand mill to a particle size of 98% below 4 microns. Add thickener to the qualified material after sand milling, stir evenly, and obtain 30% flumetralin and prohexadione calcium suspension. The clean water treatment is used as blank control (CK).

[0039] 2.2 Experimental treatment

[0040] 2.2.1 Experimental block arrangement

[0041] The experimental agent, control agent and blank control were designed in a randomized block design, with 4 replicates for each treatment and a plot area of ​​20m 2 .

[0042] 2.3 Administration

[0043] 2.3.1 Period and method of use

[0044] Application period: Apply the pesticide during the corn seedling stage and the corn flare stage;

[0045] Usage: When using, dilute the suspension with water to a total active ingredient concentration of 0.075, 0.15, or 0.3 mg / L. The dosage is 20 ml.

[0046] 2.3.2 Application equipment

[0047] Use "Shixia brand SX-MD15DA" 15L electric sprayer for spraying, conical mist nozzle, nozzle aperture 0.7 mm, pressure 0.30-0.45 MPa, flow rate 0.70-0.90 L / min.

[0048] 2.3.3 Application method

[0049] Application time: Apply once at the corn seedling stage and once at the flaring stage;

[0050] Number of applications: 2 times.

[0051] 2.4 Survey methods, time and frequency

[0052] 2.4.1 Survey duration and frequency

[0053] First survey: Investigate plant height before applying pesticides;

[0054] Second survey: 3 days after the first survey;

[0055] The third survey: the survey on drug damage 3 days after the second drug administration;

[0056] The fourth survey: 7 days after the second drug application, the plant height was investigated and the plant height growth rate was calculated;

[0057] The fifth survey: during the harvest period, the plant height, stem diameter, number of grains per ear, and ear height were investigated;

[0058] In each plot, the number of empty stalks and the total number of plants were investigated, and the empty stalk rate and the number of effective ears were calculated; the length of the bald tip of a single plant and the ear length were investigated in each plot, and the bald head rate of a single plant was calculated; and the fruits were harvested and dried in sequence according to the plot;

[0059] The sixth survey: Harvested samples were taken to measure thousand-grain weight, plot yield and quality indicators.

[0060] 2.4.2 Survey Methods

[0061] Safety investigation: 3 days after application, visually inspect corn in each plot for symptoms such as yellowing, chlorosis, wilting, and deformity; record the effects on non-target organisms.

[0062] In each plot, 10 representative plants were randomly selected and marked as fixed survey points. Plant height, stem diameter (the diameter of the wide surface of the middle of the third stem node above the ground), number of grains per ear, ear height, bald tip length and ear length were investigated to calculate the baldness rate.

[0063] Thousand-kernel weight: 1000 kernels were randomly selected from the dried corn in each plot and weighed, and the results were repeated 5 times;

[0064] Yield determination: The corn harvested from each plot is threshed, mixed, and dried in the sun before determining the overall yield of the plot;

[0065] Quality determination: In each plot, air-dried corn was selected from the samples to determine the starch content (polarimeter method) and protein content (Kjeldahl method);

[0066] Empty stalk rate: In each plot, the number of empty stalks of corn (the number of plants with less than 10% fruiting) and the total number of plants were investigated, and the empty stalk rate and the number of effective ears were calculated.

[0067] 3 Calculation formula

[0068] Yield increase rate / % = (yield of treated area - yield of blank area) / yield of blank area × 100;

[0069] Plant height growth rate (cm / d) = (plant height after drug treatment - plant height before drug treatment) / days × 100;

[0070] Number of effective ears = total number of plants - number of empty stalks;

[0071] Empty shot rate / % = number of empty shots / total number of shots × 100;

[0072] Baldness rate of single plant / %=bald tip length / ear length×100.

[0073] 4 Impact on crops

[0074] Three days after application, visually observe the corn in each treatment for signs of yellowing, chlorosis, wilting, deformity, and other pesticide damage, and record whether it is safe for crop growth.

[0075] 5 Data processing

[0076] DPS 9.01 was used for 5% significance comparison, and Duncan's new multiple range method was used for statistical analysis of the experimental data.

[0077] 6 Results Analysis

[0078] 6.1 Effects of 30% flumetralin and prohexadione-calcium suspension on corn plant height

[0079] Table 4 Effects of 30% flumetralin and prohexadione-calcium suspension on corn plant height

[0080]

[0081] Note: Different letters in the table indicate significant differences (p<0.05), the same below.

[0082] From the data analysis results in Table 4, it can be seen that in treatments 1-3, when 30% flumetralin·calcium prohexadione suspension was applied and the active ingredient dosage was 0.075 mg / L-0.3 mg / L, the plant height growth rate 7 days after the last drug application was significantly higher than that of other treatments. The plant height before drug application was between 31.94 cm and 32.07 cm, and the plant height at harvest was between 260.57 cm and 263.93 cm, indicating that the application of 30% flumetralin·calcium prohexadione suspension can effectively increase corn plant height and promote corn growth.

[0083] 6.2 Effects of 30% flumetralin and prohexadione-calcium suspension concentrate on agronomic traits of maize

[0084] Table 5 Effects of 30% flumetralin and prohexadione-calcium suspension concentrate on agronomic traits of corn

[0085]

[0086] From the data analysis results in Table 5, it can be seen that in treatments 1-3, when 30% flumetralin·prohexadione-calcium suspension was applied and the dosage of its active ingredient was 0.075mg / L-0.3mg / L, the stem diameter at harvest was between 32.30mm-32.39mm, and the ear height was between 101.85cm-103.23cm. Through significance analysis, there were significant differences in stem diameter and ear height at harvest between the tested agent, the control agent and the water control; the number of grains per ear at harvest when 30% flumetralin·prohexadione-calcium suspension was applied was 485.75-490.67 grains / ear, and its thousand-grain weight was 360.79g-365.51g. In summary, the application of 30% flumetralin·prohexadione-calcium suspension can effectively improve the agronomic traits of corn.

[0087] 6.3 Effects of 30% flumetralin and prohexadione-calcium suspension on corn yield

[0088] Table 6 Effects of 30% flumetralin and prohexadione-calcium suspension on corn yield

[0089]

[0090] From the data analysis results in Table 6, it can be seen that in the treatment of 30% flumetralin·prohexadione-calcium suspension, when the dosage of its active ingredient is 0.075mg / L-0.3mg / L, the baldness rate of individual plants is 5.99%-6.32%, and the number of effective ears is 139.63-139.66. Through significance analysis, the baldness rate of individual plants treated with 30% flumetralin·prohexadione-calcium suspension is significantly different from the baldness rate of individual plants in treatments 4-6. The results show that the application of 30% flumetralin·prohexadione-calcium suspension can effectively reduce the baldness rate and empty stalk rate of individual plants of corn and increase the number of effective ears.

[0091] Table 7 Effects of 30% flumetralin and prohexadione-calcium suspension on corn yield

[0092]

[0093] From the data analysis results in Table 7, it can be seen that the spray treatment of 30% flumetralin·prohexadione-calcium suspension has a significant regulating effect on corn yield. When the dosage of its active ingredient is 0.075mg / L-0.3mg / L, the yield of the plot is 22.24kg-22.76kg, and the yield per hectare reaches 11123.89kg / hm 2 -11384.02kg / hm 2 The yield increase rate was 11.30%-15.95%, which was significantly higher than the plot yield, hectare yield and yield increase rate of treatments 4-6.

[0094] 6.4 Effects of 30% flumetralin and prohexadione-calcium suspension concentrate on corn quality

[0095] Table 8 Effects of 30% flumetralin and prohexadione-calcium suspension concentrate on corn quality

[0096]

[0097] From the data analysis results in Table 8, it can be seen that the starch content and protein content in treatments 1-3 are significantly better than those in treatments 4-6, wherein the starch content is 74.43g / 100g-74.66g / 100g, and the protein content is 9.54g / 100g-9.63g / 100g. The results show that the spraying treatment of 30% flumetramid·prohexadione-calcium suspension can effectively improve the quality of corn and increase the starch content and protein content of corn.

[0098] 7 Conclusion

[0099] 30% flumetralin·prohexadione-calcium suspension, the dosage of active ingredient is between 0.075mg / L-0.3mg / L, the application is once in the seedling stage and the large trumpet stage of corn, a total of 2 times, the corn does not show yellowing, chlorosis, wilting and deformity and other phytotoxic phenomena, and no effect on other non-target organisms is observed, indicating that the tested agent is safe for corn and other non-target organisms. Applying 30% flumetralin·prohexadione-calcium suspension can effectively increase corn plant height, promote corn growth, improve corn agronomic traits, increase corn yield, effectively improve corn quality, and increase corn starch content and protein content, thereby indicating that the crop growth regulator containing flumetralin and prohexadione-calcium of the present invention can be applied to the corn growth period, and can effectively regulate the growth of corn with significant effect.

Claims

1. A crop growth regulator containing fluomethionine and prohexadione-calcium, characterized in that: The crop growth regulator is composed of a compound of flumetralin and prohexadione-calcium as effective ingredients.

2. The crop growth regulator containing fluomethionine and prohexadione-calcium as claimed in claim 1, characterized in that: The mass ratio of flumetralin to prohexadione-calcium is 20-35:

3.

3. The crop growth regulator containing fluomethionine and prohexadione-calcium as claimed in claim 2, characterized in that: The mass ratio of flumetralin to prohexadione-calcium is 25-30:

3.

4. The crop growth regulator containing fluomethionine and prohexadione-calcium as claimed in claim 1, characterized in that: The crop growth regulator is made of active ingredients and adjuvants into a dosage form allowed by pesticides, and the dosage form is wettable powder, soluble powder, water-dispersible granules, suspension, emulsifiable concentrate, water emulsion, microemulsion or microcapsule.

5. The crop growth regulator containing fluomethionine and prohexadione-calcium as claimed in claim 4, characterized in that: The total content of the active ingredients accounts for 23-38% of the total weight of the entire crop growth regulator.

6. The crop growth regulator containing fluomethionine and prohexadione-calcium as claimed in claim 5, characterized in that: The invention is composed of the following raw materials in percentage by weight: 20-35% of flumetralin, 3% of calcium prohexadione, 3-7% of polyoxyethylene styrylphenyl ether, 8-15% of polyoxyethylene nonylphenol ether, 0.1-0.4% of xanthan gum, 0.1-0.3% of carboxymethyl cellulose, 0.5-1.0% of polysiloxane, 0.2-0.5% of higher alcohol, 0.4-0.7% of sodium benzoate, 2-5% of ethylene glycol, 1-3% of propylene glycol, and the balance is deionized water.

7. Use of the crop growth regulator containing fluomethionil and prohexadione-calcium according to any one of claims 1 to 6 in regulating corn growth.

8. The use according to claim 7, characterized in that Apply crop growth regulators to corn during the seedling and flaring stages.

9. The use according to claim 8, characterized in that The crop growth regulator is diluted with water to a liquid with a total active ingredient concentration of 0.075-0.3 mg / L, and sprayed on the above-ground stems and leaves of corn during the seedling and flaring stages.

10. The use according to claim 7, characterized in that The crop growth regulator can effectively increase the plant height of corn, improve the plant height during the harvest period, increase the stem thickness, ear height, ear number and thousand-grain weight of corn during the harvest period, and improve the agronomic traits of corn.

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