CN105707101A - Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses - Google Patents
Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses Download PDFInfo
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- CN105707101A CN105707101A CN201610229181.4A CN201610229181A CN105707101A CN 105707101 A CN105707101 A CN 105707101A CN 201610229181 A CN201610229181 A CN 201610229181A CN 105707101 A CN105707101 A CN 105707101A
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- Prior art keywords
- pesticide
- manufacture method
- avilamycin
- chitinase
- root
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/34—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
-
- 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
- A01N25/26—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 in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
-
- 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
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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- 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)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention provides a preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses. The method comprises the following steps: (1) 70-100 parts by mass of a chitinase inhibitor and 10-40 parts of by mass abamectin or emamectin benzoate are taken; (2) the chitinase inhibitor is ground and smashed until the particle size is larger than or equal to 100 meshes; (3) abamectin or emamectin benzoate is put into a reactor, and then an organic solvent is added and uniformly stirred; (4) the ground chitinase inhibitor in the step (2) is put into the reactor, then a surfactant is added to the reactor, a polyvinyl alcohol aqueous solution is added finally, a capsule forming reaction is performed, stirring is kept in the step, and a pesticide emulsion is prepared; (5) the pesticide emulsion obtained in the step (4) is dried, and a microencapsulated powder pesticide is obtained. The microencapsulated powder pesticide prepared with the method can effectively control the root-knot nematodes.
Description
Technical field
The present invention relates to the manufacture method of a kind of microcapsule powder pesticide preventing and treating booth vegetable root-knot nematode, belong to the technical field of pesticide manufacture of chemical industry.
Background technology
Booth vegetable root-knot nematode is a kind of ancient primitive organism.For hundreds of millions of years does not have too big change, does not have nervous system in polypide, only minimal amount of neuronal cell.In recent years, root-knot nematode is quickly spread from south to north, all can detect that root-knot nematode in the green house of vegetables soil of more than half area, the whole nation.Root-knot nematode multiplies in soil, temperature of shed, and humidity is relatively stable, particularly winter, and canopy temperature is generally all very beneficial to root-knot nematode activity between 15 DEG C-25 DEG C.
Root-knot nematode draws the nutritional solution of vegetable root palpus by lancet, and discharge simultaneously stimulates the toxin of root hair growth, makes root hair expand, and loses the ability absorbing moisture and mineral from soil, and last vegetable is withered or has no harvest or the significantly underproduction.
At present, the harm of Shandong longevity emerging Vegetable Base root-knot nematode is included extremely serious.Pouring root or use methyl bromide fumigation soil after traditional prevention and controls abamectin emulsifiable concentrate pesticide dilute.Avilamycin belongs to Macrocyclic lactone compounds, and easily standby soil particle absorption in soil, diffusion is extremely restricted.Owing to Soil Microorganism enriches, complex chemical composition, at soil degrading quickly, the lasting period is shorter for pesticide.Celfume class gas depoisoning cost is high, and toxicity is big, and practical operation has great difficulty.The mu cost on average about 300-400 unit of current booth vegetable preventing and treating root-knot nematode, prevention effect is still undesirable.
Summary of the invention
It is an object of the invention to provide the manufacture method of a kind of microcapsule powder pesticide preventing and treating booth vegetable root-knot nematode, effectively to prevent and treat the generation of root-knot nematode, this manufacture method comprises the steps:
(1) chitinase inhibitors 70-100 part is taken；Avilamycin or emamectin-benzoate 10-40 part are stand-by；
(2) chitinase inhibitors is ground granularity >=100 order, stand-by；
(3) avilamycin or emamectin-benzoate being put in reactor, be subsequently adding organic solvent and stir, the addition of organic solvent is 0.1-3 times of avilamycin or emamectin-benzoate quality；The addition of organic solvent at least should can make avilamycin or emamectin-benzoate moisten, in order to avilamycin or emamectin-benzoate at least can be made in later process to be bonded in the surface of chitinase inhibitors；
(4) ground chitinase inhibitors in step (2) is put in aforesaid reaction vessel, then more above-mentioned surfactant is joined in reactor, it is eventually adding the polyvinyl alcohol water solution that mass concentration is 0.5-5% and carries out encystation reaction, in this step, it is kept stirring for, makes pesticidal emulsion；The addition of polyvinyl alcohol water solution is 1-10 times of pesticide gross mass, and described pesticide is chitinase inhibitors and avilamycin, or chitinase inhibitors and emamectin-benzoate；
(5) pesticidal emulsion obtained for step (4) is dried, obtains microcapsule powder pesticide；Above-mentioned number is mass fraction.
In step (4), carrying out in the process of encystation reaction, it is preferred to carry out at a constant temperature, so that the even particle size formed, the optimum temperature of encystation reaction is 40-60 DEG C.
Owing to polyvinyl alcohol is insoluble in water, the suitable quality concentration of polyvinyl alcohol water solution is 0.1-10%, it is preferred to use 0.5-5%.
Further, in the process of lapping of chitinase inhibitors, grinding agent can also be added, described grinding agent is one or both in kerosene, diesel oil, methyl oleate or benzoic acid Bian ester, the addition of grinding agent can improve the speed of grinding, it is possible to so that the granularity of chitinase inhibitors is more uniform.
Supplying situation according to product in the market, chitinase inhibitors is preferably one or both in d ichlorbenzuron, chloromethiuron, Cascade, HEXAFLUMURON, tebufenozide.Chitinase needed for root-knot nematode is had good inhibitory action by these several chitinase inhibitors.
Further, step (4) can also add surfactant, the addition of surfactant is 0.03-0.1 times of pesticide gross mass, and described pesticide is chitinase inhibitors and avilamycin, or chitinase inhibitors and emamectin-benzoate.The addition of surfactant can make pesticide granules suspend in the solution better, is conducive to capsule effect processed.
Further, the organic solvent in step (2) is preferably dimethylbenzene, benzoic acid, benzoic acid Bian ester or dichloromethane.Described surfactant is preferably one or both in Tween 80, span 20, sorbester p18, dodecylbenzene sodium sulfonate or sodium lauryl sulphate.These materials ensure that the smooth manufacture of pesticide.
Further, the dry run in step (4) adopts spray drying, wherein air intake 120-300 DEG C, air-out 50-200 DEG C.Spray drying can make the epigranular of pesticide, and ensures that the drug effect of pesticide is not subjected to destroy.
In this application, adopt chitinase inhibitors and avilamycin or chitinase inhibitors and emamectin-benzoate to make composite drug, jointly root-knot nematode is had an effect.In the life cycle of root-knot nematode, through repeatedly casting off a skin, if the age of root-knot nematode arrives, but can not completing to cast off a skin, its vital movement is just disturbed, and ultimately results in death.Root-knot nematode need to first secrete ecdyson when decortication, activates chitinase, decomposes Lao Pi by chitinase, promote that new skin grows, finally slough Lao Pi, and insecticide grows up.The effect of chitinase inhibitors is to allow chitinase lose activity, and can not separate in the middle of Xin Pi and Lao Pi, and Lao Pi cannot remove, and insecticide cannot be introduced into next age and finally dead.The addition of avilamycin or emamectin-benzoate accelerates the death rate of root-knot nematode.
After chitinase inhibitors and avilamycin or emamectin-benzoate are made microcapsule; protection with capsule skin; make the pesticide can slow releasing; extend the lasting period of pesticide; the lasting period making pesticide extended to 80-120 days from 10-20 days, and the prevention effect of root knot nematode is reached 95-100%.It addition, after pesticide is made microcapsule powder, use more convenient.
In order to make microcapsule powder more convenient to use, it is possible to the microcapsule powder pesticide made in step (5) is mixed with kieselguhr, further enhances the defencive function to pesticide.
Microcapsule powder pesticide obtained by the present invention in use, carries out ditch spread or spreads manuer in holes after first being mixed with thin dry ground by microcapsule powder pesticide, can sow or move bar and collect seedling after covering thin soil in ditch cave.The weight ratio of microcapsule powder pesticide and thin dry ground is 1: 50-200.
Detailed description of the invention
Embodiment 1
D ichlorbenzuron 100kg, pulverizes and sieves with high speed disintegrator, and it is stand-by that granularity reaches 100 orders.Putting into avilamycin 40kg, dichloromethane 5kg stirring in a kettle., d ichlorbenzuron, by avilamycin moistening, is joined in reactor by dichloromethane, continues stirring, makes avilamycin uniform adhesion on d ichlorbenzuron granule.Adding the polyvinyl alcohol water solution 1400kg that content is 1%, keeping temperature is 60 DEG C, and after stirring 40min, spray drying obtains microcapsule powder pesticide.When carrying out spray drying, inlet temperature controls between 120-300 DEG C, and leaving air temp controls at 50-200 DEG C.
Carry out ditch spread after the microcapsule powder pesticide taken obtained by the present embodiment and thin dry ground being mixed, and detect.
The table 1 microcapsule powder pesticide controlling experiment to Chinese cabbage root-knot nematode
Above-mentioned comparative example is for adopting and the same amount of d ichlorbenzuron of sequence number 1, avilamycin and thin dry ground ratio, and is uniformly mixed, and d ichlorbenzuron therein granularity after crushed is 100 orders.
Above-mentioned testing result shows, adopts the microcapsule powder pesticide made by the present embodiment, Chinese cabbage root-knot nematode is had good prevention effect.
Embodiment 2
Take d ichlorbenzuron 200kg, add methyl oleate 200kg and be milled to 180 orders.Add avilamycin 40kg in a kettle., benzoic acid Bian ester 100kg, after heating for dissolving, d ichlorbenzuron is joined in reactor, add surface active agent tween 80#10kg and dodecylbenzene sodium sulfonate 5kg, it is heated to 55 DEG C and stirs, add 2% polyvinyl alcohol water solution 450kg, be kept stirring for, at 55 DEG C, carry out encystation reaction obtain mixed solution in 1 hour；Above-mentioned mixed solution is carried out spray drying, removes excessive moisture and obtain microcapsule powder pesticide.
Carry out ditch spread after the microcapsule powder pesticide taken obtained by the present embodiment and thin dry ground being mixed, and detect.
The table 2 microcapsule powder pesticide controlling experiment to Caulis et Folium Brassicae capitatae root-knot nematode
Above-mentioned comparative example is for adopting and the same amount of d ichlorbenzuron of sequence number 1, avilamycin and thin dry ground ratio, and is uniformly mixed, and d ichlorbenzuron therein granularity after crushed is 180 orders.
Above-mentioned testing result shows, adopts the microcapsule powder pesticide made by the present embodiment, Caulis et Folium Brassicae capitatae root-knot nematode is had good prevention effect.
Claims (7)
1. the manufacture method of the microcapsule powder pesticide preventing and treating booth vegetable root-knot nematode, it is characterised in that: comprise the steps:
(1) chitinase inhibitors 70-100 part, is taken；Avilamycin or emamectin-benzoate 10-40 part are stand-by；
(2) granularity >=100 order, by chitinase inhibitors is ground, stand-by；
(3), avilamycin or emamectin-benzoate being put in reactor, be subsequently adding organic solvent and stir, the addition of organic solvent is 0.1-3 times of avilamycin or emamectin-benzoate quality；
(4), ground chitinase inhibitors in step (2) is put in aforesaid reaction vessel, then more above-mentioned surfactant is joined in reactor, it is eventually adding the polyvinyl alcohol water solution that mass concentration is 0.5-5% and carries out encystation reaction, in this step, it is kept stirring for, makes pesticidal emulsion；The addition of polyvinyl alcohol water solution is 1-10 times of pesticide gross mass, and described pesticide is chitinase inhibitors and avilamycin, or chitinase inhibitors and emamectin-benzoate；
(5), pesticidal emulsion obtained for step (4) is dried, obtains microcapsule powder pesticide；
Above-mentioned number is mass fraction.
2. manufacture method according to claim 1, it is characterised in that: can also adding surfactant in step (4), the addition of surfactant is 0.03-0.1 times of pesticide gross mass.
3. manufacture method according to claim 1, it is characterised in that: in the process of lapping of chitinase inhibitors, it is also possible to adding grinding agent, described grinding agent is one or both in kerosene, diesel oil, methyl oleate or benzoic acid Bian ester.
4. manufacture method according to claim 1, it is characterised in that: chitinase inhibitors is one or both in d ichlorbenzuron, chloromethiuron, Cascade, HEXAFLUMURON, tebufenozide.
5. manufacture method according to claim 1, it is characterised in that: the organic solvent in step (2) is dimethylbenzene, benzoic acid, benzoic acid Bian ester or dichloromethane.
6. manufacture method according to claim 1, it is characterised in that: described surfactant is one or both in Tween 80, span 20, sorbester p18, dodecylbenzene sodium sulfonate or sodium lauryl sulphate.
7. manufacture method according to claim 1, it is characterised in that: the dry run in step (4) adopts spray drying, wherein air intake 120-300 DEG C, air-out 50-200 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229181.4A CN105707101A (en) | 2016-04-13 | 2016-04-13 | Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610229181.4A CN105707101A (en) | 2016-04-13 | 2016-04-13 | Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses |
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Citations (8)
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|---|---|---|---|---|
| CN1308861A (en) * | 2000-02-16 | 2001-08-22 | 安阳林药厂 | Benzoylphenyl carbamides insecticides |
| CN102090408A (en) * | 2009-12-14 | 2011-06-15 | 安阳市安林生物化工有限责任公司 | Methylamino abamectin benzoate-chlorbenzuron suspending agent |
| CN102265901A (en) * | 2011-05-17 | 2011-12-07 | 广西田园生化股份有限公司 | Abamectin.lythidathion pesticide composition |
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| CN104521949A (en) * | 2014-12-15 | 2015-04-22 | 广西大学 | Microcapsule suspension agent |
-
2016
- 2016-04-13 CN CN201610229181.4A patent/CN105707101A/en active Pending
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| CN1308861A (en) * | 2000-02-16 | 2001-08-22 | 安阳林药厂 | Benzoylphenyl carbamides insecticides |
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| CN102379282A (en) * | 2011-09-13 | 2012-03-21 | 广西田园生化股份有限公司 | Ultralow volume liquid containing benzoylurea insecticide |
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