CN116548472A - Composite biocontrol strain seed treating agent, preparation method and application - Google Patents

Composite biocontrol strain seed treating agent, preparation method and application Download PDF

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Publication number
CN116548472A
CN116548472A CN202310503745.9A CN202310503745A CN116548472A CN 116548472 A CN116548472 A CN 116548472A CN 202310503745 A CN202310503745 A CN 202310503745A CN 116548472 A CN116548472 A CN 116548472A
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seed
composite
treating agent
seeds
agent
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Inventor
刘锦霞
丁品
李晶
李娜
付麟雲
聂垚琰
武建荣
张建军
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Institute of Biology of Gansu Academy of Sciences
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Institute of Biology of Gansu Academy of Sciences
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N63/00Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • A01N63/20Bacteria; Substances produced thereby or obtained therefrom
    • A01N63/22Bacillus
    • A01N63/23B. thuringiensis
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C1/00Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/06Coating or dressing seed
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N63/00Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • A01N63/20Bacteria; Substances produced thereby or obtained therefrom
    • A01N63/22Bacillus
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P1/00Disinfectants; Antimicrobial compounds or mixtures thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P21/00Plant growth regulators
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P3/00Fungicides
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P5/00Nematocides
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01PBIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P7/00Arthropodicides
    • A01P7/04Insecticides

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Microbiology (AREA)
  • Dentistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Biotechnology (AREA)
  • Virology (AREA)
  • Mycology (AREA)
  • Insects & Arthropods (AREA)
  • Botany (AREA)
  • Soil Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Abstract

The invention provides a composite biocontrol strain seed treating agent, which is solid powder formed by 80-90% of effective active components and 10-20% of auxiliary materials. The effective active components are concentrated and solidified matters of the equal proportion composite bacterial fermentation liquid of bacillus subtilis, bacillus cereus and bacillus thuringiensis. The invention mixes and sprays the fermentation concentrated solution of a plurality of strains with a carrier to obtain a concentrated solidified compound bacterial fermentation solution; mixing the plant extract with auxiliary materials to obtain the plant-controlled pesticide composition, wherein the plant-controlled pesticide composition is used for controlling plant diseases and insect pests in seeds of vegetables and crop seeds and in seedling stage of the plant-controlled pesticide composition; the seed treatment agent has high content of active ingredients, can effectively prevent and control various seeds and plant diseases and insect pests in the seedling stage, has a control effect of 61.44-83.65%, improves the seed emergence rate and survival rate, and has an average emergence rate of more than 93.58%.

Description

Composite biocontrol strain seed treating agent, preparation method and application
Technical Field
The invention belongs to the technical field of biological pesticides, and in particular relates to a multi-effect biological seed treatment agent taking multiple strains of biological control microorganisms and metabolic products as main active ingredients, a preparation method and application.
Background
The seed treatment is one of the economic and simple methods in crop pest control, the agent for treating the seeds is a seed treatment agent, the seed treatment agent can be divided into a seed dressing agent and a seed coating agent, the seed dressing agent belongs to the existing seed treatment agent, and the seed treatment agent is used before sowing seeds, so that the outside of the seeds is provided with pesticide active ingredients, and the effects of killing and resisting diseases are achieved. However, the general seed dressing agent has low requirements on the preparation, so that the agent has poor adhesiveness to the seeds after the seeds are treated, is easy to fall off, has short drug effect period, is used in the prior art, increases the dosage and operation procedures, has unsatisfactory application effect, and needs further innovation and improvement in the aspect of preparation to adapt to the development requirements of new agriculture. The seed coating agent belongs to a pre-combined seed treatment agent, the stability of a medicinal film after coating the seeds is good, the effective components of the seed coating agent are not easy to diffuse to the periphery rapidly after coating the seeds, the lasting period is long, the seed coating agent is closely attached to the seeds, the medicinal efficacy is concentrated, the bioavailability is high, plant diseases and insect pests from sprouting to a seedling stage can be effectively prevented and controlled, the smooth sprouting of the seeds is ensured, the healthy growth and development of seedlings are promoted, the coated seeds can be stored for a long time, the use is convenient, the seed coating agent is suitable for mechanical mass production, and the seed coating agent can be used as a novel seed coating agent due to the good film forming property, so the seed coating agent becomes an excellent type of the seed treatment agent and is paid attention to.
Seed treatment technology developed to a new level after the 80 s of the last century. Firstly, the development of new varieties of efficient, economical and safe pesticides is continuously used for replacing the traditional seed treatment agent. Secondly, the development and application of new dosage forms such as suspending agents, suspoemulsions, various solid preparations and the like lead the seed treatment technology to reach a new level. Thirdly, research and development of film coating seed technology promotes rapid development of seed treatment towards industrialization, mechanization and commercialization. The fourth modern seed treatment agent should have controlled and sustained release effect, and has long lasting period, and is safe to natural enemies, people and livestock and environment. Fifth, with the continuous development of biotechnology and molecular biology, studies on seed treatment using biological agents have been widely conducted, and the development of seed treatment agents is also a future development direction. The biological seed treating agent is one kind of green seed treating agent developed with biological fertilizer and biological pesticide as main active components. The seed treating agent with nitrogen fixing bacteria, phosphate decomposing bacteria, potassium decomposing bacteria, organic matter and other functional biological fertilizer bacteria and nutrients as active components is prepared through the process of producing fertilizer to promote plant to absorb nutrients, improving plant's own nourishing capacity, and has weak disease and pest preventing and controlling capacity. Therefore, seed treatments using biopesticides as a main active ingredient are more the mainstream of biological seed treatments in the future.
Biological seed treatment agents which are applied and developed at present and take biological pesticides as main active components, most of which are biocontrol bacteria single-strain seed coating agents such as bacillus, trichoderma and the like, such as: coating seed agents such as soybean, corn and the like prepared by trichoderma in the United states; thompson et al prepared beet coated seed agents for the control of saprolegniasis using antagonists and metabolites thereof; patent ZSB biological seed coating agent developed in Zhejiang has been widely used for various crops; the biological seed coating agent developed by taking trichoderma reesei REMI mutant strain fermentation liquor as an active ingredient and the like has a relative control effect of 70-75% on cucumber seed powdery mildew, and the like. And a small part of the composite seed coating agent compounded by biocontrol bacteria or biocontrol bacteria and chemical pesticides, such as: the BA biological seed coating agent which is developed by Fangxin and is compounded by bacteria and actinomycetes has better effect when being applied to wheat, corn, tomatoes and cucumbers; corn seed coating agent developed by Cesare and formed by compounding aflatoxin-free aspergillus flavus strain and two traditional pesticides can reduce the content of aflatoxin in corn kernels and protect seed growth; the Rocha et al compound and grind PGPR pseudomonas with arbuscular mycorrhizal fungi into a microbial seed coating agent, so that the yield of cowpea under low-input agricultural conditions is improved, and the like. The biocontrol seed treating agent overcomes the defects of chemical pesticide seed treating agents and has better application effect. However, the preparation of single strain has the defects of narrow prevention and control spectrum, single antibacterial mechanism, weak competitive power and unstable practical application effect, and the biological control bacteria or the compound preparation of the biological control bacteria and chemical pesticides cannot give consideration to the harm of diseases and insects, and the active bacteria are easy to be influenced by the environment, the preparation has short storage period, the chemical pesticides are brought into the preparation, the safety of the preparation is influenced, and the biological seed treatment agent in the real sense cannot be calculated.
In view of the defects of the existing seed treatment agents and the unique advantages of biological seed treatment agents, the invention develops the composite biocontrol bacterium solid seed coating agent by taking a plurality of biocontrol bacterium groups with strong stress resistance, biocontrol spectrum and action mechanism and complementary metabolic products thereof as active components, and the composite biocontrol bacterium solid seed coating agent has the advantages of safety, good control effect and stability, wide control spectrum, wide application range and longer shelf life.
Disclosure of Invention
The invention aims at providing a composite biocontrol strain seed treating agent with a plurality of biocontrol strain groups and metabolites thereof as main active components.
The second purpose of the invention is to provide a preparation method of the composite biocontrol strain seed treating agent, and the obtained solid seed treating agent is not easily affected by environmental factors, is relatively stable, has longer shelf life and is convenient to transport.
The invention further aims to provide an application technology of the composite biocontrol seed treating agent, which is used for preventing and controlling seed with shells of cucumbers, melons, tomatoes, peppers and the like, tuber seeds of potatoes and the like, crop seeds of corns and the like and plant diseases and insect pests in seedling stage of the crop seeds.
The aim of the invention is achieved by the following technical scheme:
the seed treating agent is prepared from the following components in percentage by weight: 80 to 90 percent of effective active components, 1 to 8.0 percent of film forming agent, 2.0 to 5.0 percent of wetting dispersant, 0.01 to 1.0 percent of stabilizer, 5.50 to 6.89 percent of filling agent and 0.1 to 0.5 percent of warning color; the effective active component is concentrated and solidified matters of the equal proportion composite bacterial fermentation liquid of bacillus subtilis and bacillus cereus; the bacillus subtilis is bacillus subtilis Bacillus subtilis with a preservation number of CGMCC No.24484; the Bacillus cereus is Bacillus cereus with a preservation number of CGMCC No.24485; the bacillus thuringiensis is bacillus thuringiensis Bacillus thuringiensis and has a preservation number of CGMCC No.24483.
The film forming agent is one or a mixture of several of sodium carboxymethyl starch, soluble starch, phosphorylated starch-oxidized starch acetate, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, sodium alginate, PVA17-88, PVA05-88, polyvinyl acetate, polyacrylamide, polyvinylpyrrolidone, polyacrylate, acacia, tragacanth, oxidized hydroxypropyl starch and calcium silicate in any ratio.
The wetting dispersant is one or a mixture of several of triethanolamine oleate, morwetEFW, ethylan1008W, ethylanNS-500LQ, dodecyl sulfonate, dioctyl sodium succinate sulfonate, span80, tween-80, morwet D-425, morwet D-500, lignin sulfonate, nekal BX, dispersinf AgentNNO, alkyl succinate sulfonate, dibutyl naphthalene sulfonate and the like.
The stabilizer is one or a mixture of several of magnesium aluminum silicate, aluminum stearate, hydrogen citrate, tartrate, magnesium succinate, sodium glycinate, organosilicon and fatty alcohol polyglycol ether in any ratio.
The filler is one or a mixture of several of bentonite, diatomite, attapulgite, calcium carbonate, dextrin, kaolin, white carbon black, agar, monopotassium phosphate, calcium superphosphate, ferrous sulfate, trace elements and the like in any ratio.
The warning color is one of weak acid dyes such as black T, complexing yellow GR, rose essence and the like.
The preparation method of the composite biocontrol strain seed treating agent comprises the following specific steps: firstly, mixing the Bacillus subtilis Bacillus subtilis with the preservation number of CGMCC No.24484 and Bacillus cereus with the preservation numbers of CGMCC No.24485 and Bacillus thuringiensis Bacillus thuringiensis and the fermentation concentrated solution with the preservation number of CGMCC No.24483 with a superfine crushed carrier, and spray-drying at the temperature below 70 ℃ to obtain a concentrated condensate of the composite bacterial fermentation solution; secondly, respectively superfine grinding all auxiliary materials, and fully and uniformly mixing 80% -90% of concentrated and solidified compound bacteria fermentation liquor, 0.01% -1.0% of stabilizer and 5.50% -6.89% of filler for 20 min-30 min; finally, adding 1.0 to 8.0 percent of film forming agent and 2.0 to 5.0 percent of wetting dispersant, uniformly mixing for 5 to 0min, adding 0.1 to 0.5 percent of warning color, and uniformly mixing for 30 to 40min; sieving with 1340 mesh sieve, immediately placing in clean environment with temperature of 28-30deg.C and more than 10 ten thousand grades, drying for 5-48 h to obtain composite biological control bacteria solid seed treating agent with water content less than 5%; wherein the carrier is one or more of potassium humate, peat, alginate, urea, polyacrylamide, trehalose, chitosan, sodium glutamate, maltodextrin, milk powder, phosphate and the like.
The application of the composite biocontrol strain seed treating agent is used for preventing and controlling plant diseases and insect pests in seeds of vegetables and crop seeds and at the seedling stage of the seeds; the composite biocontrol strain seed treating agent is coated or mixed with seeds, and is diluted in the prior art; the seed coating can be diluted 100-500 times, and can be mechanically coated or manually coated, and the drying temperature is controlled below 35 ℃; seed dressing, diluting 300-1000 times, and seed dressing.
The composite biocontrol strain seed treating agent provided by the invention has the advantages that:
1. the content of the effective components is high, the action mechanisms of the biological control are complementary, and the application effect is good. The composite biocontrol strain seed treating agent provided by the invention mainly comprises three biocontrol strains of different genera, wherein the three biocontrol strains have complementary action mechanisms and action targets, the three biocontrol strains respectively have complementary cooperation through destroying cell wall and cell membrane structures and stability, inhibiting protein synthesis and destroying the activity of a nematode and lepidoptera pest organism, the biocontrol activity is improved, the stress resistance is enhanced, the control effect on seed and seedling diseases and insect pests is 61.44% -83.65%, and the bacillus subtilis growth metabolism can also produce auxin, so that seed germination and seedling growth are promoted, and the emergence rate is improved by 10.21% -12.75%.
2. Broad control spectrum and wide application range. The 3 strains of biocontrol bacteria used in the composite biocontrol strain seed treating agent provided by the invention have different action mechanisms and metabolites to form flora, make up for the advantages and complement the advantages, widen the control spectrum, can be used for having stronger activity on various pathogenic bacteria and fungi pathogenic bacteria, nematodes and lepidoptera larvae, and the auxiliary materials of the preparation are selected to give consideration to the functions and synergistic effects of the auxiliary materials, so that the application range of the composite biocontrol strain seed treating agent is widened. Can be used for seeds of various plants such as cucumber, melon, potato, corn and the like, and belongs to a universal seed treatment agent.
3. The solid preparation has good stability. The composite biocontrol strain seed treating agent provided by the invention is a biological wettable powder seed treating agent, the main active components of the composite biocontrol strain seed treating agent are a plurality of biocontrol strains and a fermentation product solid preparation thereof, and the three biocontrol strains are not easily influenced by environmental factors in a dry state, so that the composite biocontrol strain seed treating agent is relatively stable, the shelf life is prolonged, and the transportation is convenient.
4. Safety and environmental protection. The main active components of the invention are a plurality of biological control microorganisms from the nature, the acute toxicity test proves that the invention is a nontoxic substance, and the plant safety test shows that the invention has no phytotoxicity, and belongs to a truly green environment-friendly pesticide which is safe to human, livestock and environment.
5. The production and application cost is low. The invention achieves the aim of effectively preventing and controlling plant diseases and insect pests in the seedling stage by treating plant seeds, aims at prevention, fully plays the advantages of small prevention and early prevention of the biocontrol agent, has small dosage and good effect. On the other hand, the bio-control microorganism fermentation solidified material serving as the main active component has the advantages of abundant sources of main production raw materials, lower price, no resource limitation, continuous production, relatively simple production process and low cost.
Detailed Description
The present invention will be further described in detail below with respect to the principles and implementations, to provide a more complete understanding of the present invention to those skilled in the art, but are not to be construed as limiting the present invention in any way.
The principle of the invention is first explained as follows:
the main effective active substances of the invention are composed of three strains of biocontrol bacteria of different genus and metabolites thereof, and have complementary synergistic effect in application due to different action mechanisms and action targets, thereby achieving the composite targets of broad spectrum, high efficiency and wider application range.
Bacillus subtilisBacillus subtilisThe metabolic active substances contain substances such as indoles, cytokinins, plant hormones, sugar, various amino acids and the like which promote the growth and development of plants, and have obvious growth promoting effect on protected plants. Octadecanoic acid, itaconic acid, sericin, benazepril, hydroxylbenzovidone, hydroxylburan, furanone, methylfuran aldehyde, nitrosothiazolidinecarboxylic acid and other antibacterial substances. The method has the advantages that the pathogenic fungus cell wall chitinase and related protective enzymes are destroyed to synthesize and promote lipid peroxidation of pathogenic fungus cells, and the cell wall and cell membrane stability of the pathogenic fungus are destroyed, so that the cell protoplasm of the pathogenic fungus is leaked and killed, meanwhile, the activity of the pathogenic fungus cell wall degrading enzyme is inhibited, the infection capability of the pathogenic fungus cell wall degrading enzyme on host plants is reduced, and the aim of inhibiting plant pathogenic bacteria such as Botrytis cinerea, fusarium oxysporum, fusarium putrescens, rhizoctonia solani, pseudomonas pathogenic bacteria, rhizoctonia cerealis, phoma tix and the like is achieved.
Bacillus cereusBacillus cereusThe metabolically active substances contain bacteriocins such as isotetrandrine, ethionamide, methylmalonic acid, methoxyphenol, ricinoleic acid and the like and organic acid antibacterial substances. Bacillus cereusBacillus cereusStrong fertility, rapid diffusion, and through competing with pathogenic bacteriaThe cell membrane is seriously damaged by competing for space occupation and inhibiting the synthesis of pathogenic bacteria cell membrane protein so as to achieve the aim of inhibiting plant pathogenic bacteria such as streptomyces scab, solanacearum, soft-rot Erwinia carotovora soft-rot pathogenic type, soft-rot Erwinia carotovora black-rot pathogenic type, corynebacterium circulans, pseudomonas syringae pathogenic type, eschar, fusarium oxysporum, alternaria solani and the like. In addition, the fermentation metabolites of the plant growth regulator also comprise plant growth regulators such as indoleacetic acid, cytokinin, amino acid and the like, so that the growth and development of the protected plants are promoted.
Bacillus thuringiensisBacillus thuringiensisThe metabolic active substances contain dihydroxycinnamic acid, homovanillic acid, aminobutyral, ethyldimethyl pyrazine, methyl deoxyjirimycin, pyridine base, peptide, compound amino acid, rotenone, carbene dehydropiperazine, tetrahydropyrrole and other insecticidal antibacterial compounds, and the metabolic active substances have the effects of killing or inhibiting lepidoptera pests such as armyworms and plutella xylostella, aphid and other ptera pests and crop nematodes such as root-knot nematodes and root-rot nematodes through the effects of stomach toxicity, contact killing and growth and development inhibition. In addition, the metabolites of the plant growth regulating substances such as single amino acid groups, plant kinetin and the like can promote the health of the protected plants and enhance the disease resistance and insect resistance of the plants.
Two strains of the three biocontrol bacteria cooperatively attack cell membranes or cell walls of different or same target pathogenic bacteria in different modes in application, and damage the structure and stability of the biocontrol bacteria or inhibit the activity of cell wall degrading enzyme of the biocontrol bacteria, so that the hypha growth, spore germination stopping and dip dyeing capacity of the target pathogenic bacteria are reduced, the combined application achieves the effect of spread spectrum efficient sterilization, and the bacillus thuringiensis is mainly effective on soil insects such as nematodes, overcomes the defects of other two antibacterial strains, and achieves the broad-spectrum target of both pest and disease prevention. In addition, the metabolites of the plant seed and seedling growth regulator also respectively contain special amino acids, plant kinetin, plant growth regulating substances and the like, can effectively promote the growth and development of the protected plants, and synergistically improve the antibacterial and insecticidal application effects of the protected plants, so that the purposes of efficiently controlling the harm and spread of plant seeds and seedlings, promoting the germination of the seeds and the growth of the seedlings, and improving the quality of treated seeds are achieved.
The present invention and its advantageous effects are further illustrated by the following examples and test examples.
1. Examples 1 to 9: the composition ratio of each component of the composite biocontrol strain seed treating agent is shown in table 1.
Table 1 examples 1-9 the proportions of the components of the composite biocontrol seed treating agent
Annotation: 100kg of composite biocontrol strain seed treating agent is prepared in advance.
2. Examples 10 to 14, a method for preparing a composite biocontrol seed treating agent
Example 10, a preparation method of a composite biocontrol strain seed treating agent, taking the formula of example 1 as an example, comprises the following steps: firstly, mixing bacillus subtilis, bacillus cereus and bacillus thuringiensis fermentation concentrated solution with a carrier subjected to superfine grinding, and spray drying at the temperature of below 70 ℃ to obtain a concentrated and solidified compound bacteria fermentation solution. Secondly, respectively superfine grinding all auxiliary materials, fully mixing the concentrated and solidified 80% composite bacteria fermentation liquor with 0.96% of stabilizer and 6.89% of filler which are uniformly mixed for 30min, finally adding 6.65% of film forming agent and 5.0% of wetting dispersant, uniformly mixing for 10min, adding 0.5% of warning color, and uniformly mixing for 30min. Sieving with 1340 mesh sieve, immediately placing at 28deg.C under clean environment above 10 ten thousand grades, and drying for 5 hr to obtain the composite biocontrol bacterium wettable powder seed treating agent with water content less than 5%. Wherein the carrier is peat.
Example 11, a preparation method of a composite biocontrol strain seed treating agent, taking the formula of example 2 as an example, comprises the following steps: firstly, mixing bacillus subtilis, bacillus cereus and bacillus thuringiensis fermentation concentrated solution with a carrier subjected to superfine grinding, and spray drying at the temperature of below 70 ℃ to obtain a concentrated and solidified compound bacteria fermentation solution. Secondly, respectively superfine grinding all auxiliary materials, fully mixing the concentrated and solidified product of 81% composite bacteria fermentation liquor with 1.0% of stabilizer and 5.50% of filler which are uniformly mixed for 25min, finally adding 8.0% of film forming agent and 4.2% of wetting dispersing agent, uniformly mixing for 8min, adding 0.3% of warning color, and uniformly mixing for 40min. Sieving with 1340 mesh sieve, immediately placing at 28deg.C under clean environment above 10 ten thousand grades, and drying for 6 hr to obtain the composite biocontrol bacterium wettable powder seed treating agent with water content less than 5%. Wherein the carrier is a mixture of potassium humate, urea and trehalose (3:0.5:2).
Example 12, a preparation method of a composite biocontrol strain seed treating agent, taking the formula of example 4 as an example, comprises the following steps: firstly, mixing bacillus subtilis, bacillus cereus and bacillus thuringiensis fermentation concentrated solution with a carrier subjected to superfine grinding, and spray drying at the temperature of below 70 ℃ to obtain a concentrated and solidified compound bacteria fermentation solution. Secondly, respectively superfine grinding all auxiliary materials, fully mixing the concentrated and solidified product of 83% composite bacteria fermentation liquor with uniformly mixed 0.01% stabilizing agent and 5.89% filling agent for 28min, finally, adding 7.5% film forming agent and 3.5% wetting dispersing agent, uniformly mixing for 8min, adding 0.1% warning color, and uniformly mixing for 38min. Sieving with 1340 mesh sieve, immediately placing in clean environment with temperature of 30deg.C and more than 10 ten thousand grades, and drying for 48 hr to obtain the composite biocontrol bacterium wettable powder seed treating agent with water content less than 5%. Wherein the carrier is a mixture of sodium glutamate and phosphate (1:2).
Example 13, a preparation method of a composite biocontrol strain seed treating agent, taking the formula of example 8 as an example, comprises the following steps: firstly, mixing bacillus subtilis, bacillus cereus and bacillus thuringiensis fermentation concentrated solution with a carrier subjected to superfine grinding, and spray drying at the temperature of below 70 ℃ to obtain a concentrated and solidified compound bacteria fermentation solution. Secondly, respectively superfine grinding all auxiliary materials, fully mixing the 89% composite bacteria fermentation liquor concentrated condensate with 1.0% stabilizer and 6.80% filler which are uniformly mixed for 30min, finally, adding 1% film forming agent and 2.1% wetting dispersant, uniformly mixing for 5min, adding 0.1% warning color, and uniformly mixing for 40min. Sieving with 1340 mesh sieve, immediately placing in clean environment with temperature of 29 deg.C and over 10 ten thousand grades, and drying for 5 hr to obtain the composite biocontrol bacterium wettable powder seed treating agent with water content less than 5%. Wherein the carrier is a mixture of polyacrylamide, maltodextrin and phosphate (3:2:3).
Example 14, a preparation method of a composite biocontrol strain seed treating agent, taking the formula of example 9 as an example, comprises the following steps: firstly, mixing bacillus subtilis, bacillus cereus and bacillus thuringiensis fermentation concentrated solution with a carrier subjected to superfine grinding, and spray drying at the temperature of below 70 ℃ to obtain a concentrated and solidified compound bacteria fermentation solution. Secondly, respectively superfine grinding all auxiliary materials, fully mixing the 90% composite bacteria fermentation liquor concentrated condensate with 0.08% stabilizer and 5.50% filler which are uniformly mixed for 20min, finally adding 2.2% film forming agent and 2.0% wetting dispersant, uniformly mixing for 10min, adding 0.2% warning color, and uniformly mixing for 40min. Sieving with 1340 mesh sieve, immediately placing in clean environment with temperature of 30deg.C and more than 10 ten thousand grades, and drying for 24 hr to obtain the composite biocontrol bacterium wettable powder seed treating agent with water content less than 5%. Wherein the carrier is a mixture of peat, urea, chitosan and milk powder (6:1:2:3).
3. Application technology of composite biocontrol strain seed treating agent
1. Application targets: is seed of cucumber, melon, tomato, capsicum, etc., tuber seed of potato, etc., and crop seed of corn, etc.
2. The application method comprises the following steps:
diluting at present. The seed coating can be diluted 100-500 times, mechanical coating can be carried out, manual coating can also be carried out, and the drying temperature is controlled below 35 ℃; seed dressing, diluting 300-1000 times, and seed dressing.
4. Test verification of the composite biocontrol strain seed treating agent
Test example 1 influence of the invention on seed germination
Testing seeds to be treated: cucumber, melon, tomato, capsicum, cabbage, corn.
Selecting healthy and full seeds with uniform size, sterilizing with 75% ethanol for 20min, sterilizing with 0.5% sodium hypochlorite for 1min, and washing with sterile water to remove water. Respectively pouring into 100 times diluted composite biocontrol strain seed treating agent (prepared according to example 4) solution, fully and uniformly stirring, taking out, and airing for standby. The weight-to-volume (g/ml) ratio of the seed to the composite biocontrol strain seed treating agent solution is 1:7.
The treated seeds with uniform coating are selected, and each 20 treated seeds are arranged in a group and are placed in a culture dish with the diameter of 9-12 mm, wherein 3 layers of wet filter paper are paved on the culture dish. Healthy full, uniformly sized untreated seeds were used as controls. Each treatment was repeated 5 times. And (5) culturing in the dark at 26+/-1 ℃, and counting the germination rate of all seeds when 50% of the seeds of the control germinate. The bud with white bud color and no rot and deterioration is used as a normal bud. The results are detailed in Table 2.
TABLE 2 Effect of the invention on seed germination
Annotation: the same column of lowercase letters in the table, different numbers for the same species treated and untreated indicate significant differences at the 0.05 level (p.ltoreq.0.05)
Test example 2: the invention affects the emergence rate of seeds and the growth of seedlings (greenhouse pot culture)
Testing seeds to be treated: cucumber, melon, tomato, capsicum, cabbage, corn.
Selecting healthy and full seeds with uniform size, sterilizing with 75% ethanol for 20min, sterilizing with 0.5% sodium hypochlorite for 1min, and washing with sterile water to remove water. Respectively pouring into 200 times diluted composite biocontrol strain seed treating agent (prepared according to example 5) solution, fully and uniformly stirring, taking out, and airing for standby. The weight-to-volume (g/ml) ratio of the seed to the composite biocontrol strain seed treating agent solution is 1:7.
Selecting the uniformly coated seeds, sowing the seeds into 50-hole seedling trays filled with mixed matrixes (coco coir humus soil vermiculite 0.5:3:0.2), treating 2 trays for each variety, and taking healthy and full uncoated seeds with uniform size as respective controls. And (3) carrying out normal management of moisture preservation (65% -70%) and heat preservation (25+/-1 ℃), counting the emergence rate after 10d, and measuring growth indexes such as root length, plant height, fresh weight of each seedling and the like after 32 days of emergence. The results are detailed in Table 3.
TABLE 3 effects of the invention on seed emergence and seedling growth
Annotation: as in table 2.
Test example 3: the invention treats the prevention and control effect of seeds on soil-borne diseases (greenhouse pot culture)
Testing seeds to be treated: cucumber, cabbage, corn.
Selecting healthy and full seeds with uniform size, sterilizing with 75% ethanol for 20min, sterilizing with 0.5% sodium hypochlorite for 1min, and washing with sterile water to remove water. Respectively pouring the above-mentioned materials into 250 times diluted solution of composite biological control strain seed treatment agent (prepared according to example 1), fully uniformly stirring them, taking out, drying and using for stand-by. The weight-to-volume (g/ml) ratio of the seed to the composite biocontrol strain seed treating agent solution is 1:7.
Preparation of pathogenic bacteria spore suspension: and (3) respectively carrying out activation culture on fusarium oxysporum, fusarium putrescicum and rhizoctonia solani by using a PDA culture medium at 26+/-1 ℃ for 10 d-15 d, eluting with a proper amount of sterile water after a large number of spores or sclerotium are generated, and preparing spore suspension with the spore content of more than 108 cfu.ml < -1 > for later use.
Sterilizing the mixed matrix of the coco coir humus soil vermiculite (0.5:3:0.2), then placing the sterilized mixed matrix in 50 plug seedling trays, and respectively inoculating 20 ml pathogenic bacteria spore suspensions into each plug by adopting a perfusion access method and placing the mixed matrix in a moisturizing way for 3 days, wherein each pathogenic bacteria is inoculated into 12 plug seedling trays. Sowing, wherein each treatment of the seeds is carried out by using 2 plug trays, and the non-coated seeds are used as a control. Culturing at 25+ -1deg.C and humidity of about 70% under light cycle of 10 hr/14 hr. And (5) observing and recording the emergence growth condition every day, investigating the number of the disease-causing plants after 30 days of emergence, and counting the disease-causing plant rate and the prevention and control effect. The results are detailed in Table 4.
The calculation formula is as follows: disease rate (%) =number of disease plants/total number of investigation plants×100
Control effect (%) = (control area disease rate-treatment area disease rate)/control area disease rate×100
TABLE 4 control effect of the treatment of seeds on soil-borne diseases according to the invention
Annotation: 1. fusarium oxysporum, fusarium putrescens and Rhizoctonia solani are pathogenic bacteria of plant fusarium wilt, root rot and rhizoctonia solani respectively; 2. as in table 2.
Test example 4: the seed dressing potato seeds have the effect of preventing and controlling plant diseases and insect pests
Healthy and uniform potato stock seeds (Long potato No. 10) with the weight of 9-10 g are selected, washed with sterile water and dried. Pouring the mixture into a diluted solution of 600 times of the composite biocontrol strain seed treating agent (prepared according to the embodiment 9), fully and uniformly stirring, fishing out, and airing for standby. The weight-volume (g/ml) ratio of the potato stock seed to the composite biocontrol strain seed treating agent solution is 1:10. Seeds were treated as positive control in the same way with 16% Xin Liu carbendazim suspension diluted 100-fold and untreated seeds as blank control.
The test consisted of 3 treatments, namely the seed of the invention treatment, a blank control, a positive control. Every 5 replicates treated, 15 experimental cells total, 33m per group area 2 And (3) arranging random granules. Applying a composite organic fertilizer in winter, deep turning, sowing in the next 4 months, and adopting a ridging and film covering planting mode, wherein each ridge is 120cm wide (adding furrows), the height of each ridge is 2cm, the width of each ridge is 70cm, and the plant spacing is 30cm. Cultivation and management are the same as other cultivated lands. Every 5 days, the emergence, plant growth and pest occurrence are observed and recorded, and the disease types, plant disease rate, pest types, pest population density and the like are counted 25 days after emergence. The results are detailed in Table 5.
Calculation formula, disease rate (%) =number of disease plants/total number of investigation plants×100
Control effect (%) = (control area disease rate-treatment area disease rate)/control area disease rate×100
Rate of reduction of insect population (%) = (insect population density in control area-insect population density in treatment area)/insect population density in control area x 100
TABLE 5 prevention and control effects of seed dressing treated Potato seed of the invention on plant diseases and insect pests
Annotation: 1. the potato is continuously planted in the test land for 3 years, the rainfall in the current year is slightly more, and the average temperature is slightly higher; 2. the pest population density is 5 points selected randomly in each district, each point is 1.5 square meters, 20-25cm is dug along the position 5cm away from the center of the plant, the pest number and the species are investigated, the pest number in unit area is calculated, and the pest population densities of the cutworm and the flammulina velutipes are respectively 0.31 per m 2 0.40/m 2 The method comprises the steps of carrying out a first treatment on the surface of the 3. Pathogenic bacteria of the bacterial wilt, soft rot, early blight, fusarium wilt and root rot are respectively rhizoctonia solani, erwinia carotovora pathotype, alternaria solani, fusarium oxysporum and root knot nematode, and the disease plant rates of untreated seeds are respectively 9.13%, 4.89%, 6.58%, 9.74% and 7.28%; fourth, the statistical analysis is as in table 2.
Data analysis: experimental results (tables 2, 3 and 5) of experimental examples 1, 2 and 4 show that the germination rate, emergence rate and seedling growth of seeds such as cucumber, melon, tomato, capsicum, cabbage, corn and potato treated by the composite biocontrol seed treatment agent coating or seed dressing provided by the invention have obvious promotion effect, and have obvious difference (p is less than or equal to 0.05) from untreated controls. Experimental results (tables 4 and 5) of test examples 3 and 4 show that the prevention and treatment effects of cucumber seeds, cabbage seeds, corn seeds and seed-dressing treated potato seeds by the composite biocontrol seed treatment agent provided by the invention are 76% -84%, the incidence rate of the composite biocontrol seed treatment agent is much lower than that of untreated seeds, and the obvious difference (p is less than or equal to 0.05) exists. The results of example 4 (Table 5) further show that the composite biocontrol seed treatment agent provided by the invention has the control effects of 61.44% and 70.60% on potato seeds treated with the seed dressing agent, respectively, the control effects of 16% Xin Liu carbendazim suspension agent without the control agent are strong (p is less than or equal to 0.05), the control effects of 77.29%, 78.63% and 79.19% on disease damping-off, soft rot and fusarium wilt respectively, the control effects of 16% Xin Liu carbendazim suspension agent without the control agent are not significant (p is more than or equal to 0.05), the control effects of 76.42% and 77.53% on early blight and root rot of potato respectively, and the control effects of 16% Xin Liu carbendazim suspension agent without the control agent are strong (p is less than or equal to 0.05).
The preservation number mentioned in the invention is CGMCC No.24484, CGMCC No.24485,
the biological material samples of CGMCC No. 24483' are all applied for an invention patent in 2022, 10 and 26 days and published before the application date of the invention, and the application numbers are respectively as follows: 2022110334179, 2022110336511, 2022110345188.

Claims (8)

1. The composite biocontrol strain seed treating agent is characterized by being prepared from the following components in percentage by weight: 80 to 90 percent of effective active components, 1 to 8.0 percent of film forming agent, 2.0 to 5.0 percent of wetting dispersant, 0.01 to 1.0 percent of stabilizer, 5.50 to 6.89 percent of filling agent and 0.1 to 0.5 percent of warning color; the effective active component is concentrated and solidified matters of the equal proportion composite bacterial fermentation liquid of bacillus subtilis and bacillus cereus; the bacillus subtilis is bacillus subtilis Bacillus subtilis, and the preservation number is CGMCC No.24484; the Bacillus cereus is Bacillus cereus with a preservation number of CGMCC No.24485; the bacillus thuringiensis is bacillus thuringiensis Bacillus thuringiensis and has a preservation number of CGMCC No.24483.
2. The composite biocontrol strain seed treating agent according to claim 1, wherein: the film forming agent is one or a mixture of several of sodium carboxymethyl starch, soluble starch, phosphorylated starch-oxidized starch acetate, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, sodium alginate, PVA17-88, PVA05-88, polyvinyl acetate, polyacrylamide, polyvinylpyrrolidone, polyacrylate, acacia, tragacanth, oxidized hydroxypropyl starch and calcium silicate in any ratio.
3. The composite biocontrol strain seed treating agent according to claim 1, wherein: the wetting dispersant is one or a mixture of several of triethanolamine oleate, morwetEFW, ethylan1008W, ethylanNS-500LQ, dodecyl sulfonate, dioctyl sodium succinate sulfonate, span80, tween-80, morwet D-425, morwet D-500, lignin sulfonate, nekal BX, dispersinf AgentNNO, alkyl succinate sulfonate, dibutyl naphthalene sulfonate and the like.
4. The composite biocontrol strain seed treating agent of claim 1, wherein the stabilizer is one or a mixture of any ratio of magnesium aluminum silicate, aluminum stearate, hydrogen citrate, tartrate, magnesium succinate, sodium glycinate, organosilicon and fatty alcohol polyglycol ether.
5. The composite biocontrol strain seed treating agent of claim 1, wherein the filler is one or a mixture of several of bentonite, diatomite, attapulgite, calcium carbonate, dextrin, kaolin, white carbon black, agar, monopotassium phosphate, calcium superphosphate, ferrous sulfate, trace elements and the like in any ratio.
6. The composite biocontrol strain seed treating agent of claim 1, wherein the warning color is one of weak acid dyes such as black T, complex yellow GR, rose essence and the like.
7. The method for preparing the composite biocontrol strain seed treating agent according to claim 1, which is characterized by comprising the following steps: the method comprises the following specific steps: firstly, mixing the Bacillus subtilis Bacillus subtilis with the preservation number of CGMCC No.24484 and Bacillus cereus with the preservation numbers of CGMCC No.24485 and Bacillus thuringiensis Bacillus thuringiensis and the fermentation concentrated solution with the preservation number of CGMCC No.24483 with a superfine crushed carrier, and spray-drying at the temperature below 70 ℃ to obtain a concentrated condensate of the composite bacterial fermentation solution; secondly, respectively superfine grinding all auxiliary materials, and fully and uniformly mixing 80% -90% of concentrated and solidified compound bacteria fermentation liquor, 0.01% -1.0% of stabilizer and 5.50% -6.89% of filler for 20 min-30 min; finally, adding 1.0 to 8.0 percent of film forming agent and 2.0 to 5.0 percent of wetting dispersant, uniformly mixing for 5 to 0min, adding 0.1 to 0.5 percent of warning color, and uniformly mixing for 30 to 40min; sieving with 1340 mesh sieve, immediately placing in clean environment with temperature of 28-30deg.C and more than 10 ten thousand grades, drying for 5-48 h to obtain composite biological control bacteria solid seed treating agent with water content less than 5%; wherein the carrier is one or more of potassium humate, peat, alginate, urea, polyacrylamide, trehalose, chitosan, sodium glutamate, maltodextrin, milk powder, phosphate and the like.
8. The use of a composite biocontrol seed treatment agent according to any one of claims 1-7, wherein: the method is used for preventing and controlling plant diseases and insect pests in seeds of vegetables and crop seeds and in seedling stage; the composite biocontrol strain seed treating agent is coated or mixed with seeds, and is diluted in the prior art; the seed coating can be diluted 100-500 times, and can be mechanically coated or manually coated, and the drying temperature is controlled below 35 ℃; seed dressing, diluting 300-1000 times, and seed dressing.
CN202310503745.9A 2023-05-06 2023-05-06 Composite biocontrol strain seed treating agent, preparation method and application Pending CN116548472A (en)

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