CN110583655A - Disease-prevention water-retaining agent for citrus and preparation method thereof - Google Patents
Disease-prevention water-retaining agent for citrus and preparation method thereof Download PDFInfo
- Publication number
- CN110583655A CN110583655A CN201910908482.3A CN201910908482A CN110583655A CN 110583655 A CN110583655 A CN 110583655A CN 201910908482 A CN201910908482 A CN 201910908482A CN 110583655 A CN110583655 A CN 110583655A
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- Prior art keywords
- disease
- retaining agent
- bactericide
- water
- agent
- Prior art date
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- 230000006806 disease prevention Effects 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 235000020971 citrus fruits Nutrition 0.000 title claims abstract description 35
- 241000207199 Citrus Species 0.000 title claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 90
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 79
- 239000003899 bactericide agent Substances 0.000 claims abstract description 71
- 201000010099 disease Diseases 0.000 claims abstract description 40
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims abstract description 40
- 239000010949 copper Substances 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 32
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 27
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 16
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- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- BSDQITJYKQHXQR-UHFFFAOYSA-N methyl prop-2-eneperoxoate Chemical compound COOC(=O)C=C BSDQITJYKQHXQR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011259 mixed solution Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 31
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 30
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 230000005855 radiation Effects 0.000 claims description 21
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- RQFQJYYMBWVMQG-IXDPLRRUSA-N chitotriose Chemical compound O[C@@H]1[C@@H](N)[C@H](O)O[C@H](CO)[C@H]1O[C@H]1[C@H](N)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)N)[C@@H](CO)O1 RQFQJYYMBWVMQG-IXDPLRRUSA-N 0.000 claims description 15
- 229960000892 attapulgite Drugs 0.000 claims description 14
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- WFDXOXNFNRHQEC-GHRIWEEISA-N azoxystrobin Chemical compound CO\C=C(\C(=O)OC)C1=CC=CC=C1OC1=CC(OC=2C(=CC=CC=2)C#N)=NC=N1 WFDXOXNFNRHQEC-GHRIWEEISA-N 0.000 claims description 10
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 9
- 229930182692 Strobilurin Natural products 0.000 claims description 8
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 8
- 239000005800 Kresoxim-methyl Substances 0.000 claims description 7
- 230000000855 fungicidal effect Effects 0.000 claims description 7
- 239000000417 fungicide Substances 0.000 claims description 7
- ZOTBXTZVPHCKPN-HTXNQAPBSA-N kresoxim-methyl Chemical compound CO\N=C(\C(=O)OC)C1=CC=CC=C1COC1=CC=CC=C1C ZOTBXTZVPHCKPN-HTXNQAPBSA-N 0.000 claims description 7
- -1 methoxy acrylic ester Chemical class 0.000 claims description 7
- 235000015097 nutrients Nutrition 0.000 claims description 7
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000005869 Pyraclostrobin Substances 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004021 humic acid Substances 0.000 claims description 6
- HZRSNVGNWUDEFX-UHFFFAOYSA-N pyraclostrobin Chemical compound COC(=O)N(OC)C1=CC=CC=C1COC1=NN(C=2C=CC(Cl)=CC=2)C=C1 HZRSNVGNWUDEFX-UHFFFAOYSA-N 0.000 claims description 6
- 150000001413 amino acids Chemical class 0.000 claims description 5
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 4
- MMUFAGXJPKNAHT-UHFFFAOYSA-N copper;quinolin-8-ol Chemical compound [Cu].C1=CN=C2C(O)=CC=CC2=C1 MMUFAGXJPKNAHT-UHFFFAOYSA-N 0.000 claims description 4
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 4
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 claims description 2
- 239000005750 Copper hydroxide Substances 0.000 claims description 2
- 239000000783 alginic acid Substances 0.000 claims description 2
- 229920000615 alginic acid Polymers 0.000 claims description 2
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- 235000010443 alginic acid Nutrition 0.000 claims description 2
- 150000004781 alginic acids Chemical class 0.000 claims description 2
- 229910001956 copper hydroxide Inorganic materials 0.000 claims description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims description 2
- 229940076286 cupric acetate Drugs 0.000 claims description 2
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims description 2
- 229940112669 cuprous oxide Drugs 0.000 claims description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 claims description 2
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 2
- LITQZINTSYBKIU-UHFFFAOYSA-F tetracopper;hexahydroxide;sulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Cu+2].[Cu+2].[Cu+2].[Cu+2].[O-]S([O-])(=O)=O LITQZINTSYBKIU-UHFFFAOYSA-F 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
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- 238000004659 sterilization and disinfection Methods 0.000 abstract description 11
- 235000013399 edible fruits Nutrition 0.000 abstract description 8
- 231100000674 Phytotoxicity Toxicity 0.000 abstract description 6
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- 230000005923 long-lasting effect Effects 0.000 abstract description 2
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- 244000052616 bacterial pathogen Species 0.000 description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 9
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- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 4
- 235000019797 dipotassium phosphate Nutrition 0.000 description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 4
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- 239000005752 Copper oxychloride Substances 0.000 description 2
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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
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- 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
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
-
- 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
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/50—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids the nitrogen atom being doubly bound to the carbon skeleton
-
- 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
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
- A01N43/42—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
-
- 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
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
-
- 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
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/82—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with three ring hetero atoms
-
- 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
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
- A01N59/20—Copper
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a disease-proof water-retaining agent for citrus and a preparation method thereof, wherein the disease-proof water-retaining agent comprises the following raw materials in percentage by weight: 0.5-5% of methoxy acrylate bactericide, 3-8% of copper bactericide, 20-50% of acrylic acid, 20-50% of alkaline substance, 0.1-5% of cross-linking agent, 0.5-5% of natural component and 10-30% of anti-sticking agent. Adjusting the pH value of acrylic acid to 5-6 by using an alkaline substance, sequentially adding a natural component, a cross-linking agent, a copper bactericide and a methoxy acrylate bactericide, uniformly mixing, carrying out irradiation polymerization to obtain a gel block, granulating the gel block, and drying to obtain the disease-preventing water-retaining agent. The disease-prevention water-retaining agent has the advantages of good sterilization effect, long-lasting pesticide effect, good prevention effect and the like, does not generate phytotoxicity, is not easy to generate pesticide resistance, and does not damage leaves and fruit surfaces; and the pesticide is convenient to apply, the efficiency is high, repeated pesticide application is not needed, and the pesticide effect is not influenced by the weather.
Description
Technical Field
The invention belongs to the technical field of pesticide preparations, and particularly relates to a disease-prevention water-retaining agent for citrus and a preparation method thereof.
Background
Many citrus diseases are caused by infection of fungal pathogenic bacteria, the fungal diseases are common, such as sooty mold, scab, anthracnose, resinoid, scab, powdery mildew, sand skin disease, foot rot, yellow spot, stalk rot and the like, the canker in bacterial diseases is quite common, the growth and development of citrus are influenced, the yield is reduced, the germ transmission and infection are facilitated when the rainfall is large, the disease is serious, the disease is not easy to be cured, the bactericide needs to be sprayed for many times, and the diseased branches are trimmed, which wastes money and energy.
For example, the citrus anthracnose is caused by colletotrichum gloeosporioides in fungi, commonly occurs in various citrus producing areas in China, and the epidemic of the citrus anthracnose is reported in parts of provinces such as Shaanxi, Guangdong, Hunan and Sichuan, and great economic loss is caused. After the plant is damaged, withered spots, withered branches, dry scars and rot of fruits are generated on leaves, and fallen leaves, fallen fruits, dead seedlings and bark and dead trees are caused in severe cases. The pathogeny of the disease is weak parasitic bacteria, attachment cells generally and abundantly exist on the surface of plants, and the disease has strong resistance to commonly used bactericides, and the commonly used bactericides such as carbendazim wettable powder, azoxystrobin, Bordeaux mixture, mancozeb and the like are sprayed for 2-3 times about 15 days, so that the disease can be alleviated. After the pesticide is sprayed, the disease recurrence rate is high, and the pesticide spraying times are more.
At present, various bactericides can relieve citrus diseases caused by fungi and bacteria, and are classified into systemic bactericides and protective bactericides according to the action mode.
The systemic bactericide can permeate into crops or be absorbed by the crops and conducted in vivo, directly acts on pathogenic bacteria or influences plant metabolism, kills or inhibits pathogenic processes of the pathogenic bacteria, and removes diseases or relieves the diseases. The strobilurin fungicide is used as a systemic fungicide, has wide bactericidal spectrum and high bactericidal activity, has protection, treatment, eradication, permeation and systemic activity, is effective on most pathogenic bacteria in ascomycetes, basidiomycetes, deuteromycetes and oomycetes, inhibits pathogenic spore germination, hypha growth and spore formation, and has obvious control effects on citrus anthracnose, powdery mildew, scab, penicilliosis, green mold, sand skin disease, fatty spot yellow spot disease and the like caused by fungi. The bactericide is safe to crops, can be rapidly degraded in the environment and cannot be accumulated in the environment; the composition also has good protection and treatment effects on early infection of diseases; and can promote antioxidation, protect plants from being influenced by harmful oxidizing substances and delay aging. However, the methoxy acrylic ester bactericides are easy to generate drug resistance after being continuously used.
The protective bactericide has wide bactericidal spectrum and strong curative effect; the drug resistance of germs is not easy to generate. The copper preparation is used as one of the protective bactericides, has the characteristic of high-efficiency systemic conduction, and can be absorbed by the roots of plants. The bactericidal spectrum is wide, the bactericidal composition has a prevention effect on diseases caused by bacteria, oomycetes, gray mold, anthrax, cercospora and the like, can inhibit fungal spore germination and hypha development, and can prevent and control fungal diseases and bacterial diseases; not only has protective effect, but also has preventive effect, and has certain treatment and eradication effects; and has the characteristics of low toxicity, no public nuisance and environmental protection. Meanwhile, the bactericide can be mixed with most of pesticides, and no germ showing resistance to the copper preparation is found up to now. However, direct spraying of the copper preparation is prone to chemical injury, and the chemicals accumulate on leaves and fruit surfaces to form spots, which affects the marketability, and even may cause too high local copper ion concentration due to improper use, which causes chemical injury, leaves falling in light cases, and death in heavy cases.
At present, most of pesticides adopt a spraying method to kill germs on the surface of plants and achieve the bactericidal effect, but the pesticide effect period can be shortened due to factors such as rain wash and the like, and repeated pesticide spraying is needed. The bactericide is applied to the root, the medicine is absorbed by the root of the plant, the bactericide is transmitted in vivo, the sterilizing effect is durable, the bactericide is not interfered by the outside, but under the condition of water shortage, the bactericide is not easy to be absorbed by the root, the water content is excessive, and the medicament can run off along with the water.
Disclosure of Invention
In order to solve the problems, the invention provides a disease-prevention water-retaining agent for citrus and a preparation method thereof, and the disease-prevention water-retaining agent has the characteristics of good sterilization effect, long-lasting pesticide effect, good prevention effect and the like, does not generate phytotoxicity or drug resistance, and does not damage leaves and fruit surfaces; and the pesticide application is convenient, the efficiency is high, repeated pesticide spraying is not needed, and the pesticide effect is not influenced by the weather.
The technical scheme adopted by the invention is as follows:
a disease-prevention water-retaining agent for citrus comprises the following raw materials in percentage by weight:
0.5-5% of methoxy acrylate bactericide, 3-8% of copper bactericide, 20-50% of acrylic acid, 20-50% of alkaline substance, 0.1-5% of cross-linking agent, 0.5-5% of natural component and 10-30% of anti-sticking agent.
Preferably, the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight:
0.5-2% of methoxy acrylic ester bactericide, 6-8% of copper bactericide, 35-50% of acrylic acid, 20-40% of alkaline substance, 0.1-2.0% of cross-linking agent, 0.5-3.0% of natural component and 15-20% of anti-sticking agent.
Preferably, the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight:
3-5% of methoxy acrylic ester bactericide, 3-5% of copper bactericide, 20-40% of acrylic acid, 30-40% of alkaline substance, 1-3% of cross-linking agent, 3-5% of natural component and 20-30% of anti-sticking agent.
Preferably, the strobilurin fungicide is one or more of azoxystrobin, kresoxim-methyl and pyraclostrobin.
Preferably, the copper bactericide is one or more of copper hydroxide, copper sulfate, basic copper sulfate, cuprous oxide, cupric oxychloride, cupric acetate, oxine-copper, thiediazole-copper and the like.
Preferably, the alkaline substance is one or more of potassium hydroxide, sodium hydroxide, ammonia water, dipotassium hydrogen phosphate, disodium hydrogen phosphate and the like.
Preferably, the cross-linking agent is one or more of glycerol, ethylene glycol, bisacrylamide and bismethacrylamide.
Preferably, the natural ingredients are nutritional ingredients, and one or more of starch, humic acid, alginic acid, chitosan oligosaccharide, amino acid and the like are selected.
Preferably, the anti-sticking agent is one or more of talcum powder, stearate, bentonite, attapulgite and the like.
Preferably, the preparation method of the disease-prevention water-retaining agent comprises the following steps:
the method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using an alkaline substance to obtain a first mixed solution;
step two: adding natural ingredients, a cross-linking agent, a copper bactericide and a methoxy acrylate bactericide into the mixed solution in sequence, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding an anti-sticking agent in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
Preferably, the radioactive source used for the radiation polymerization is cobalt-60, and the total radiation dose is 3-15 kGy.
The invention combines the strobilurin fungicide and the copper preparation, wherein the strobilurin fungicide mainly aims at fungal diseases and has special effect on fungal diseases such as anthracnose, powdery mildew and scab of oranges, the copper preparation mainly aims at bacterial diseases such as canker and the like, respective toxic effects mutually affect to generate synergistic action, the sterilization effect is better, the combination of the two preparations enlarges the sterilization range on the citrus diseases, the characteristic that the strobilurin fungicide is easy to generate resistance is effectively solved, the combination of the two bactericides with different properties can play roles of making good and short, synergizing and preventing diseases in a broad spectrum besides exerting respective drug effect, and can effectively overcome and delay the drug resistance of harmful bacteria to pesticides, thereby ensuring the prevention and treatment effect on anthracnose, powdery mildew and scab of oranges, The scab, the ulcer and other diseases caused by fungi and bacteria play a good role in preventing and treating, and the aim of multiple effects of one medicine is fulfilled.
According to the invention, the methoxy acrylic acid ester bactericide, the bactericidal copper preparation and the water-retaining agent form a disease-prevention water-retaining agent, so that the bactericide is placed in a three-dimensional network of the water-retaining agent, and the water-retaining agent is a high-molecular polymer with high water absorption and water retention, has a three-dimensional network structure and can absorb water with the weight being hundreds of times of the self weight; the organic silicon fertilizer is applied to agriculture and forestry, is combined with soil, improves the granular structure of the soil, increases the permeability and is beneficial to the growth of crops. Therefore, the bactericide is added into the neutralization solution, the disease-proof water-retaining agent gel is prepared by irradiation polymerization, the bactericide is applied to the soil at the root of the plant, the disease-proof water-retaining agent gel swells when meeting water along with watering or rainwater, and the bactericide is slowly released for the plant to absorb, thereby achieving the effect of long-term sterilization. Greatly improves the utilization rate of the bactericide, prolongs the pesticide effect and achieves the purpose of reducing the application and improving the efficiency of the pesticide, so that the slow-release agent particles and the base fertilizer can be applied together for the absorption of roots; part of the sustained-release agent particles are released along with the water, absorbed by the roots of the plants, and part of the sustained-release agent particles are retained in the network structure of the sustained-release agent particles, slowly released and long in duration, so that the problems of too fast release speed, short duration, repeated spraying and re-spraying after raining of the copper preparation and the methoxy acrylate bactericide can be avoided; meanwhile, the method can prevent the damage of the chemical injury caused by too high concentration of copper ions and the damage of leaf surfaces or fruit surfaces. Solves the problems of low utilization rate and short period of validity of the bactericide medicament on the market at present.
The bactericide composition can also adopt a granulation mode that the bactericide and the water-retaining agent are directly crushed for granulation, namely, the copper bactericide, the strobilurin bactericide and the water-retaining agent are crushed and then are uniformly mixed for granulation, and the preparation mode comprises the steps of crushing 20-50% of the strobilurin bactericide, the copper bactericide and the water-retaining agent and other required raw materials such as an adhesive, uniformly mixing, and then preparing the mixture into slow-release granules by using a granulator or a tablet press.
However, the methoxyl acrylic ester and the copper bactericide are added into the neutralization solution before polymerization of the water retention agent, compared with the method that the bactericide and the water retention agent are directly crushed and mixed for granulation, the bactericide can be better wrapped in a cross-linked network of the water retention agent, so that the slow release effect is better, the lasting period is longer, and compared with the method that the bactericide and the water retention agent are directly mixed for granulation, the production process is greatly simplified, two steps of mixing and granulation are omitted, the steps of drying and crushing the water retention agent are omitted, and the production cost is greatly reduced.
Meanwhile, the natural ingredients are added to be graft copolymerized with the acrylic acid, so that the degradation of the disease-prevention water-retaining agent is facilitated, the water-retaining agent can be completely degraded under the action of soil microorganisms, the soil and the environment cannot be damaged or polluted, and meanwhile, the selected natural ingredients are organic nutrient substances, so that the disease resistance and the stress resistance of plants can be improved, the growth of the plants is promoted, and an auxiliary effect on prevention and control of citrus diseases is achieved.
Meanwhile, the type of the bactericide selected by the invention is ensured not to influence the polymerization of the water-retaining agent, and the bactericide is a systemic bactericide so that the bactericide can be transported upwards from the root of the plant, thereby playing a role in sterilization; the mixed use of various components can not generate phytotoxicity; and the components and the mixture thereof have small side effect on the environment and the orange and have the function of promoting the growth of plants.
The disease-prevention water-retaining agent prepared by the invention can be applied together with a base fertilizer, and has a good slow release effect, so that the disease of one season can be solved by one-time application with or without spraying a corresponding medicament in the later period, the using amount of pesticides is greatly reduced, the application frequency is reduced, and the labor cost is saved. Meanwhile, the water-retaining agent disclosed by the invention is added with natural components, is nontoxic, pollution-free and degradable, and can promote plant growth. The bactericide and natural substances are added into the neutralization solution for preparing the water-retaining agent, polymerized into the disease-preventing water-retaining agent and then prepared into granules, and water and fertilizer are continuously supplied to plants by utilizing the coupling action of water, medicines and fertilizers, so that the plants are strengthened and the disease resistance is improved; meanwhile, continuous medicine supply is carried out, and the occurrence of diseases is prevented. The main initial stage infection sources of outbreak and epidemic of bacteria and fungal diseases are overwintering diseased branches and leaves and germs in soil, and the germs can be transmitted and developed under proper conditions such as temperature in the next year, so that the growth and fruiting of citrus trees are influenced, and serious yield reduction is caused. The disease-preventing water-retaining granules are applied to soil along with base fertilizer, can uniformly and continuously supply water, fertilizer and pesticide to plants, and can strengthen the growth of trees and enhance the disease-resistant capability, and meanwhile, the pesticide maintains a certain effective concentration to kill germs, eliminate the infection source and block the transmission path, thereby ensuring the normal growth of citrus.
Specifically, the present invention has the following advantages:
1. compared with the single use of two bactericides, the method of compounding the copper preparation and the methoxy acrylate bactericides is not easy to generate drug resistance; the two medicaments are compounded to have the effect of preventing and treating diseases caused by bacteria and fungi, one medicament has multiple effects, and farmers can reduce the types and times of spraying the medicaments.
2. Compared with spraying agents, the fertilizer is hard particles, is buried in soil along with base fertilizer by adopting a root application method, only needs to be applied once in one season, and saves manpower and financial resources; the harm to people and environment caused by the drift of the liquid medicine in the process of spraying the medicine is avoided; overcomes the defect that the copper preparation is easy to generate phytotoxicity when being sprayed, the pesticide spots on the leaf surface influence the physiological function of the leaf, and the pesticide spots on the fruit surface influence the fruit commodity.
3. Compared with the bactericide and water-retaining agent mixed granulation, the disease-preventing water-retaining agent disclosed by the invention has the advantages that natural substances and the bactericide are connected or wrapped in a net structure of the water-retaining agent, the duration of the drug effect period is longer, and the sterilization is more thorough.
4. The granules are added with nutrient components, thereby being beneficial to the growth of plants and enhancing the disease resistance.
Detailed Description
The present invention is further illustrated by the following examples, which include, but are not limited to, the following examples.
First, examples and comparative examples
Example 1
Preparation of a disease-prevention water-retaining agent:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 1% of azoxystrobin, 8% of thiediazole copper, 30% of acrylic acid, 20% of ammonia water, 20% of dipotassium phosphate, 4% of glycerol, 4% of starch, 0.5% of chitosan oligosaccharide, 5% of talcum powder and 7.5% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using ammonia water and dipotassium hydrogen phosphate to obtain a mixed solution I;
step two: sequentially adding starch, chitosan oligosaccharide, glycerol, thiediazole copper and azoxystrobin into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding talcum powder and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Example 2
Preparation of a disease-prevention water-retaining agent:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 2% of kresoxim-methyl, 7% of oxine-copper, 40% of acrylic acid, 10% of potassium hydroxide, 15% of ammonia water, 5% of glycerol, 3% of humic acid, 1% of chitosan, 2% of stearate and 15% of bentonite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using ammonia water and potassium hydroxide to obtain a mixed solution I;
step two: sequentially adding humic acid, chitosan, glycerol, oxine-copper and kresoxim-methyl into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding stearate and bentonite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Example 3
Preparation of a disease-prevention water-retaining agent:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 3% of pyraclostrobin, 6% of copper acetate, 45% of acrylic acid, 15% of potassium hydroxide, 10% of sodium hydroxide, 0.5% of bis-methacrylamide, 4% of amino acid, 1% of chitosan oligosaccharide, 1% of stearate and 14.5% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using sodium hydroxide and potassium hydroxide to obtain a first mixed solution;
step two: sequentially adding amino acid, chitosan oligosaccharide, bis-methacrylamide, copper acetate and pyraclostrobin into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding stearate and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Example 4
Preparation of a disease-prevention water-retaining agent:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 4% of kresoxim-methyl, 5% of copper oxychloride, 25% of acrylic acid, 20% of dipotassium phosphate, 20% of disodium hydrogen phosphate, 1% of bis-methacrylamide, 2% of starch, 2% of chitosan, 10% of talcum powder and 11% of bentonite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using dipotassium hydrogen phosphate and disodium hydrogen phosphate to obtain a mixed solution I;
step two: adding starch, chitosan, bis (methacrylamide), copper oxychloride and kresoxim-methyl into the mixed solution in sequence, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding talcum powder and bentonite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Example 5
Preparation of a disease-prevention water-retaining agent:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 5% of azoxystrobin, 4% of copper sulfate, 50% of acrylic acid, 5% of potassium hydroxide, 15% of sodium hydroxide, 2% of bis-methacrylamide, 4% of humic acid, 1% of chitosan oligosaccharide, 2% of stearate and 12% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using potassium hydroxide and sodium hydroxide to obtain a first mixed solution;
step two: sequentially adding humic acid, chitosan oligosaccharide, bis-methacrylamide, copper sulfate and azoxystrobin into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding stearate and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Comparative example 1
A preparation method of a sterilization compound preparation for spraying comprises the following steps:
the sterilization compound preparation comprises the following raw materials in percentage by weight: 26% of azoxystrobin, 65% of thiediazole copper and 9% of chitosan oligosaccharide.
The raw materials are mixed evenly to prepare a compound preparation which is sprayed with water before use.
Comparative example 2
Preparation of a slow-release type methoxy acrylate particle:
the slow-release granule comprises the following raw materials in percentage: 5% of azoxystrobin, 30% of acrylic acid, 20% of ammonia water, 20% of dipotassium phosphate, 4% of glycerol, 4% of starch, 0.5% of chitosan oligosaccharide, 6% of talcum powder and 10.5% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using ammonia water and dipotassium hydrogen phosphate to obtain a mixed solution I;
step two: sequentially adding starch, chitosan oligosaccharide, glycerol and azoxystrobin into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding talcum powder and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the methoxy acrylate sustained-release particles.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Comparative example 3
Preparation of copper preparation slow-release granules:
the slow-release granule comprises the following raw materials in percentage: 8% of thiediazole copper, 30% of acrylic acid, 20% of dipotassium phosphate, 4% of glycerol, 4% of starch, 0.5% of chitosan oligosaccharide, 6% of talcum powder and 7.5% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using ammonia water and dipotassium hydrogen phosphate to obtain a mixed solution I;
step two: adding starch, chitosan oligosaccharide, glycerol and thiediazole copper into the mixed solution in sequence, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding talcum powder and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the copper preparation slow-release particles.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Comparative example 4
Preparation of a composite sustained-release granule:
the sustained-release agent granules comprise the following raw materials in percentage by weight: 1% of kresoxim-methyl, 8% of thiediazole copper, 45% of starch grafted water-retaining agent, 44.5% of binder, 1% of lubricant and 0.5% of chitosan oligosaccharide.
The method comprises the following steps: pulverizing the above components to particle size of 0.18mm or less;
step two: uniformly mixing the components crushed in the first step to obtain mixed powder;
step three: and (3) granulating the powder mixed in the step two by using a granulator or a tabletting machine or tabletting and sieving to obtain the composite sustained-release granules.
Comparative example 5
A preparation method of a sustained-release granule without natural nutrients comprises the following steps:
the disease-prevention water-retaining agent comprises the following raw materials in percentage by weight: 3% of pyraclostrobin, 6% of copper acetate, 45% of acrylic acid, 15% of potassium hydroxide, 10% of sodium hydroxide, 0.5% of bis-methacrylamide, 1% of stearate and 19.5% of attapulgite.
The method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using sodium hydroxide and potassium hydroxide to obtain a first mixed solution;
step two: sequentially adding amino acid, chitosan oligosaccharide, bis-methacrylamide, copper acetate and pyraclostrobin into the mixed solution, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding stearate and attapulgite in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the natural nutrient-free slow-release particles.
And thirdly, selecting a cobalt-60 radioactive source for radiation polymerization, wherein the total radiation dose is 3-15 kGy.
Secondly, a drug effect verification test:
1. the drug effect slow release of various bactericides: the contents of all the effective components of examples 1 to 5 and comparative examples 1 to 4 were measured, and after leaching at 25 ℃ for 24 hours, the contents of the effective components in the leaching solutions were measured, and the release rates were calculated. Wherein, the release rate is preferably less than or equal to 15 percent, preferably 15 to 50 percent, 50 to 80 percent is common, and not less than 80 percent is absent; the test results are shown in table 1;
2. and (3) field efficacy test: the granules in the embodiments 1 to 5 and the comparative examples 1 to 4 are applied together with a base fertilizer, the sprayed compound preparation is mixed with water and sprayed at the initial stage of disease attack, the spraying is continuously carried out for 2 to 3 times at intervals of 7 to 10 days, the disease attack condition is investigated and counted 10 to 14 days after the last time of medicine application, and the disease index and the prevention and treatment effect are calculated by investigating the total leaf number and the leaf number of each stage of disease; observing whether the citrus fruits are harmed or not and the degree of the harming to the citrus fruits in the examples 1 to 5 and the comparative examples 1 to 4,
blade classification standard:
level 0: no disease;
level 1: the area of the lesion spots accounts for less than 5% of the whole leaf area;
and 3, level: the lesion area accounts for 6 to 15 percent of the whole leaf area;
and 5, stage: the lesion area accounts for 16 to 25 percent of the whole leaf area;
and 7, stage: the lesion area accounts for 26-50% of the whole leaf area;
and 9, stage: the lesion area accounts for more than 51 percent of the whole leaf area;
according to the invention, the field efficacy test of the granules and the spraying compound preparation in the examples 1-5 and the comparative examples 1-4 on the citrus anthracnose is carried out, and the test results are shown in the table 1;
according to the invention, the field efficacy test of the granules and the spraying compound preparation of the examples 1-5 and the comparative examples 1-4 is carried out on citrus powdery mildew, and the test results are shown in table 1;
the granules and the spraying liquid of the examples 1 to 5 and the comparative examples 1 to 4 are subjected to a field drug effect test on citrus scab, and the test results are shown in table 1;
the granules and the spraying liquid of the examples 1 to 5 and the comparative examples 1 to 4 are subjected to a field drug effect test on citrus canker, and the test results are shown in table 1;
3. drug resistance: obtained according to the properties and data of the medicament.
Table 1 shows the results of the above tests:
from the results, the disease-prevention water-retaining agent prepared by the method has the control effect on various diseases of citrus above 78%, has no phytotoxicity, and only needs to be applied together with base fertilizer; the control effect of the spraying preparation compounded by the same bactericide is lower than 75 percent, and the spraying preparation has slight phytotoxicity, needs to be sprayed for multiple times, and needs to be sprayed again after rain.
In addition, the slow release granule prepared from a single bactericide has few varieties of citrus germs, and the single use of the methoxyl acrylate medicament can generate drug resistance, and even the use of the methoxyl acrylate slow release granule can also generate drug resistance of plants.
In addition, the slow release effect of the composite slow release type particles obtained by directly crushing and granulating the composite bactericide and the water-retaining agent is not good in the slow release effect of the disease-preventing water-retaining agent obtained by mixing the composite bactericide and the water-retaining agent and then carrying out irradiation polymerization on the mixed raw materials.
In addition, as can be seen from the comparison between the example 3 and the control group 5, when no nutrient is added to the control group 5, the prepared sustained-release granules without natural nutrient have a better sterilization effect than the disease-preventing water retention agent prepared in the example 3. The addition of nutrient substances in the disease-prevention water-retaining agent can also influence the sterilization effect of the composite bactericide.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The disease-proof water-retaining agent for the citrus is characterized by comprising the following raw materials in percentage by weight:
0.5-5% of methoxy acrylate bactericide, 3-8% of copper bactericide, 20-50% of acrylic acid, 20-50% of alkaline substance, 0.1-5% of cross-linking agent, 0.5-5% of natural component and 10-30% of anti-sticking agent.
2. The disease-prevention water-retaining agent for citrus as claimed in claim 1, wherein the content of the disease-prevention water-retaining agent comprises the following raw materials by weight percent:
0.5-2% of methoxy acrylic ester bactericide, 6-8% of copper bactericide, 35-50% of acrylic acid, 20-40% of alkaline substance, 0.1-2.0% of cross-linking agent, 0.5-3.0% of natural component and 15-20% of anti-sticking agent.
3. The disease-prevention water-retaining agent for citrus as claimed in claim 1, wherein the content of the disease-prevention water-retaining agent comprises the following raw materials by weight percent:
3-5% of methoxy acrylic ester bactericide, 3-5% of copper bactericide, 20-40% of acrylic acid, 30-40% of alkaline substance, 1-3% of cross-linking agent, 3-5% of natural component and 20-30% of anti-sticking agent.
4. A disease-preventing water-retaining agent for citrus according to any one of claims 1 to 3, wherein the strobilurin fungicide is any one or more of azoxystrobin, kresoxim-methyl and pyraclostrobin.
5. A disease-preventing water-retaining agent for citrus according to any one of claims 1 to 3, wherein the bactericidal copper preparation is one or more of copper hydroxide, copper sulfate, basic copper sulfate, cuprous oxide, cupric oxychloride, cupric acetate, oxine-copper, thiediazole-copper, etc.
6. A disease prevention water retaining agent for citrus according to any one of claims 1 to 3, wherein the alkaline substance is one or more of potassium hydroxide, sodium hydroxide, ammonia water, dipotassium hydrogen phosphate, disodium hydrogen phosphate, etc.
7. A disease-resistant water retaining agent for citrus according to any one of claims 1 to 3, wherein the cross-linking agent is one or more of glycerol, ethylene glycol, bisacrylamide and bismethacrylamide.
8. A disease-prevention water-retaining agent for citrus according to any one of claims 1 to 3, wherein the natural ingredient is a nutrient ingredient selected from one or more of starch, humic acid, alginic acid, chitosan oligosaccharide, amino acid, etc.
9. A disease prevention water retaining agent for citrus according to any one of claims 1 to 3, wherein the anti-sticking agent is one or more of talc, stearate, bentonite, attapulgite and the like.
10. A method for preparing a disease-preventing water-retaining agent for citrus as claimed in any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: weighing a proper amount of acrylic acid, and then adjusting the pH value to 5-6 by using an alkaline substance to obtain a first mixed solution;
step two: adding natural ingredients, a cross-linking agent, a copper bactericide and a methoxy acrylate bactericide into the mixed solution in sequence, and uniformly mixing to obtain a mixed solution II;
step three: placing the mixed solution II into an irradiation container, and carrying out irradiation polymerization to obtain a gel block;
step four: granulating the gel block in an extrusion granulator, and adding an anti-sticking agent in the granulation process to obtain semi-finished product particles;
step five: and drying the semi-finished product particles to obtain the disease-prevention water-retaining agent.
In the third step, the radiation source for radiation polymerization is cobalt-60, and the total radiation dose is 3-15 kGy.
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Inventor after: Wei Min Inventor after: Liu Ying Inventor after: Luo Longxin Inventor after: Yan Qinghai Inventor after: Yang Pinghua Inventor before: Yang Pinghua Inventor before: Wei Min Inventor before: Luo Longxin Inventor before: Yan Qinghai Inventor before: Liu Ying |