CN110292042A - It is a kind of prevent and treat cacac moth heavy wall type microcapsule formulations preparation and control method - Google Patents
It is a kind of prevent and treat cacac moth heavy wall type microcapsule formulations preparation and control method Download PDFInfo
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- CN110292042A CN110292042A CN201910659988.5A CN201910659988A CN110292042A CN 110292042 A CN110292042 A CN 110292042A CN 201910659988 A CN201910659988 A CN 201910659988A CN 110292042 A CN110292042 A CN 110292042A
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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
- 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
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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
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/183—Treatment of tobacco products or tobacco substitutes sterilization, preservation or biological decontamination
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
- A24B15/34—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a carbocyclic ring other than a six-membered aromatic ring
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Abstract
The invention discloses a kind of preparation of heavy wall type microcapsule formulations for preventing and treating cacac moth and control methods, include the following steps: for pyrethroids class raw medicine to be dissolved in methylene chloride and obtain mixed solution, obtain oily phase after adding urethane-modified isocyanates mixing；Emulsifier is dissolved in deionized water and obtains water phase；Oil is mutually slowly added to obtain the oil/water lotion of homogeneous stability in water phase；Methylene chloride in gained oil/water lotion is removed, obtains the targeted suspension containing microcapsules, filtration drying obtains heavy wall type pyrethroids class microcapsule formulations.The dilution of heavy wall type microcapsule formulations is configured to cacac moth sprinkling medical fluid when prevention and treatment, is added in mobile type electric sprayer, in tobacco leaf warehouse sprinkling microcapsule formulation medical fluid and follow-up observation and records cacac moth sprinkling medical fluid related data in use.Invention increases effect microcapsule wall thickness, the advantages that pyrethroids class utilization rate, extension effective acting time, reduction medicament access times is improved, and raw material sources are extensive, it is low in cost.
Description
Technical field:
The present invention relates to cacac moth Prevention Technique field more particularly to a kind of heavy wall type microcapsules for preventing and treating cacac moth
The preparation of agent and control method, the cigarette suitable for tobacco barns libraries such as tobacco first baking cigarette purchase spot, central warehouse, tobacco redrying enterprises
The prevention and treatment of grass meal snout moth's larva.
Background technique:
Cacac moth Ephestia elutella (H ü bner) belongs to Lepidoptera (Lepidoptera) Phycitidae
(Phycitidae), be otherwise known as tobacco powder sp or tobacco leaf snout moth.Cacac moth is a kind of omnivorousness stored product pest, mainly
Endanger tobacco leaf, can also feeding wheat, soybean, pea, semen viciae fabae, peanut, cocoa bean, flour and a variety of dry fruits etc., be tobacco storage
Primary pest in the process.
Cacac moth is widely distributed all over the world, and in addition to Tibet is not reported, other provinces and regions are had been reported that in China.In China
In leaf tobacco production, since first flue-cured tobacco moisture content is higher, southern climates condition is suitable in addition, tobacco leaf sugar part content is higher, which exists
My south and southwestern various regions occur it is more, such as Yunnan, Guizhou, Sichuan, Fujian, Jiangxi, Guangdong, Hunan produce cigarette district occur compared with
Weight.
Although in China tobacco to the prevention and treatment of cacac moth there are many effective method, be limited to warehouse condition,
The factors such as tobacco leaf moisture content, logistics program, workshop structure limit the application of some technologies.In recent years, due to tobacco leaf supply and demand shape
The variation of condition, junior tobacco leaf extend and produce and process in the library time for the ignorance of corner or spot as yet untouched by a clean-up campaign management in link, more plus
The generation of insect pest situation has been weighed, and the generation of cacac moth further causes to perplex to the tobacco leaf sale of tobacco business corporations, therefore,
It is necessary to study it is a kind of rapidly will cacac moth insect density in low just packhouse, reduce the effective ways of tobacco leaf loss.
First flue-cured tobacco is mostly used sack packaging at present, and cacac moth larva climbs out of and changes on sack to corner, wall before pupating
Pupa mates in order to have sufficient space to find spouse after sprouting wings.Therefore using this habit of cacac moth on prevention practice
Property is prevented and treated in this stage, to reduce adult quantity, so as to which cacac moth filial generation insect population number in warehouse is greatly lowered
Amount.
Summary of the invention:
In order to make up the deficiency of prior art problem, the object of the present invention is to provide a kind of heavy wall types for preventing and treating cacac moth
The preparation of microcapsule formulations and control method have the advantages that inexpensive, easy to operate, efficient, the green and lasting period is long, can effectively go out
Kill cacac moth.
Technical scheme is as follows:
The preparation method for preventing and treating the pyrethroids class heavy wall type microcapsule formulations of cacac moth, which comprises the steps of:
A, pyrethroids class raw medicine is dissolved in methylene chloride and obtains mixed solution, then carbamate is added into mixed solution
Modified isocyanate is uniformly mixed as wall material, obtains oily phase；
B, emulsifier is then dissolved in deionized water, obtains water phase under high-shearing dispersion emulsifying machine shearing；
C, oil is mutually slowly added in water phase in step A, shears to obtain homogeneous stability by high speed shear dispersion emulsifying machine
Oil/water lotion；
D. the methylene chloride in step B in gained oil/water lotion is removed, then obtains the target containing microcapsules and suspends
Liquid, filtration drying obtain heavy wall type pyrethroids class microcapsule formulations.
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that the pyrethroids class is former
Medicine is lambda-cyhalothrin, effective cypermethrin, any one or more in tralomethrin.
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that the pyrethroids class is former
Medicine and methylene chloride volume ratio are 1:(50~200).
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that the pyrethroids class is former
Medicine and urethane-modified isocyanates volume ratio are 1:(50~200).
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that newborn in the step B
Agent is using Tween-40, Tween-40 and deionized water according to mass ratio 1:(10~50) proportion, using high cut disperse emulsification
High-rate of shear of the machine in 6000-10000r/min obtains water phase.
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that oily in the step C
Mutually be slowly added to water phase, oil is mutually and water phase is according to mass ratio 1:1, by with high-shearing dispersion emulsifying machine in 6000-10000r/
The high-rate of shear of min obtains the oil/water lotion of homogeneous stability；
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that in the step D
Oil/water lotion is added in vacuum type rotation evaporator, is opened vacuum type rotation evaporator and is removed methylene chloride, is contained
The targeted suspension of microcapsules.
The preparation method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which is characterized in that in the step C
1~800 μm of microcapsule granule of partial size is obtained in the filter of oil/water lotion, 5~10 μm of microcapsule granule wall thickness.
The control method of the heavy wall type microcapsule formulations of the prevention and treatment cacac moth, which comprises the steps of:
1) after heavy wall type microcapsule formulations obtained in claim 1, are diluted 10~1000 times, mobile type electric spray is added
In day with fog, it is configured to cacac moth sprinkling medical fluid；
2), tobacco leaf warehouse by microcapsule formulation medicine liquid spray in the wall edge in tobacco barn library, each support post edges with
And corner or spot as yet untouched by a clean-up campaign；
3), the ground in step 2) within the distance range of tobacco leaf warehouse surroundings wall and 30~50cm of support column and
Heavy wall type microcapsule formulations medical fluid is uniformly sprayed on metope, ground spray width is 50CM, and metope spraying swath is also 50CM, spraying operation
When, movement speed is consistent, and spraying wide cut is consistent, guarantees equably spraying；
4), follow-up observation and record cacac moth sprinkling medical fluid related data, different disposal area trap in use
To cacac moth adult quantity, different disposal area check cacac moth dead larvae borer population, time drug effect lasting period.
Compared with prior art, the present invention has the advantage that
1, its raw material sources of the invention are packet using urethane-modified isocyanates in commercialized pyrethroids class raw medicine
Material is covered, has increase effect microcapsule wall thickness, raising pyrethroids class utilization rate, extension effective acting time, reduction medicament to make
It is the advantages that with number, and raw material sources are extensive, low in cost, furthermore urethane-modified isocyanic acid used in preparation process
Ester is lower relative to isocyanates toxicity；
2, the present invention passes through using urethane-modified isocyanates as cyst wall cladding pyrethroids active component and uniform
Dispersion, obtained microcapsule formulation have the characteristics that efficient, green and lasting period are long.The mature larva of cacac moth is utilized simultaneously
There is the gap from tobacco leaf packing material to crawl out, the habit for emergence of pupating on the wall in warehouse and at gap, by microcapsule formulation
Uniformly it is sprayed at wall edge, each support post edges and the corner or spot as yet untouched by a clean-up campaign in warehouse, when larva creeps on reservoir area ground, body
Microcapsule formulations are touched, cyst wall is ruptured, medical fluid exudation is adhered on the body wall of cacac moth and killed.Test result shows:
Cacac moth is prevented and treated using heavy wall type microcapsule formulations, effectively it can be killed and controls insect density；
3, control method of the present invention as cacac moth in a kind of tobacco warehouse has raising pyrethroid effective
Components utilising rate reduces photodegradation, extends preparation effective acting time, thus the advantages that efficiently reducing the medication frequency；Meanwhile
Since active principle microcapsules are wrapped up, when spraying operation, decreases skin irritatin of the medicament to operating personnel.Cacac moth
Mature larva has the gap from tobacco leaf packing material to crawl out the biological habit pupated, due to tobacco leaf source place, tobacco leaf chemistry at
Divide the influence of the factors such as difference, former storage ground condition, the time that cacac moth larva climbs out of in tobacco package object in library is different, makes
When being prevented and treated with conventional formulation, or so week will be primary by spraying, and using the method for the invention, only medication 1 time i.e. within 30 days
It can reach effect same.Effectively insect density in control tobacco leaf warehouse.
Detailed description of the invention:
Fig. 1 is heavy wall type microcapsule formulations preparation method flow chart of the invention.
Fig. 2 is heavy wall type microcapsule formulations control method flow chart of the invention.
Fig. 3 is the cacac moth that traps of 1 different disposal area of the embodiment of the present invention (between processing, control between) into borer population
Amount.
Fig. 4 is the tobacco that 3 different disposal area of the embodiment of the present invention (microcapsules treatment region, aqueous emulsion treatment region) traps
Powder snout moth's larva adult quantity.
Fig. 5 is microcapsule formulation phenogram of the invention.
Fig. 6 is the effect picture that tobacco commercial company tobacco leaf central warehouse of the present invention prevents and treats cacac moth.
Fig. 7 is the effect picture of the present invention just flue-cured tobacco central warehouse prevention and treatment cacac moth.
Specific embodiment:
Below by way of specific embodiment, the invention will be further described.It will be appreciated by those skilled in the art that these
Embodiment is merely to illustrate the present invention, does not limit the scope of the invention in any way.Experimental method in following embodiments,
It unless otherwise specified, is conventional method.
The preparation method for preventing and treating the pyrethroids class heavy wall type microcapsule formulations of cacac moth, includes the following steps:
A, pyrethroids class raw medicine is dissolved in methylene chloride and obtains mixed solution, then carbamate is added into mixed solution
Modified isocyanate is uniformly mixed as wall material, obtains oily phase；
B, emulsifier is then dissolved in deionized water, obtains water phase under high-shearing dispersion emulsifying machine shearing；
C, oil is mutually slowly added in water phase in step A, shears to obtain homogeneous stability by high speed shear dispersion emulsifying machine
Oil/water lotion；
D. the methylene chloride in step B in gained oil/water lotion is removed, then obtains the target containing microcapsules and suspends
Liquid, filtration drying obtain heavy wall type pyrethroids class microcapsule formulations.
Pyrethroids class raw medicine is lambda-cyhalothrin, effective cypermethrin, any one or more in tralomethrin.
Pyrethroids class raw medicine and methylene chloride volume ratio are 1:(50~200).
Pyrethroids class raw medicine and urethane-modified isocyanates volume ratio are 1:(50~200).
Emulsifier is using Tween-40, Tween-40 and deionized water according to mass ratio 1:(10~50 in step B) proportion, it adopts
High-rate of shear with high-shearing dispersion emulsifying machine in 6000-10000r/min obtains water phase.
Oil is mutually slowly added to water phase in step C, and oil is mutually and water phase is according to mass ratio 1:1, by using high cut disperse emulsification
Machine obtains the oil/water lotion of homogeneous stability in the high-rate of shear of 6000-10000r/min；
Oil/water lotion is added in vacuum type rotation evaporator in step D, opens vacuum type rotation evaporator removal
Methylene chloride obtains the targeted suspension containing microcapsules.
1~800 μm of microcapsule granule of partial size is obtained in the filter of oil/water lotion in step C, 5~10 μm of microcapsule granule wall thickness.
The control method of pyrethroid heavy wall type microcapsule formulations, includes the following steps:
1) after heavy wall type microcapsule formulations obtained in claim 1, are diluted 10~1000 times, mobile type electric spray is added
In day with fog, it is configured to cacac moth sprinkling medical fluid；
2), tobacco leaf warehouse by microcapsule formulation medicine liquid spray in the wall edge in tobacco barn library, each support post edges with
And corner or spot as yet untouched by a clean-up campaign；
3), the ground in step 2) within the distance range of tobacco leaf warehouse surroundings wall and 30~50cm of support column and
Quasi- heavy wall type microcapsule formulations medical fluid is uniformly sprayed on metope, ground spray width is 50CM, and metope spraying swath is also 50CM, spraying to make
When industry, movement speed is consistent, and spraying wide cut is consistent, guarantees equably spraying；
4), follow-up observation and record cacac moth sprinkling medical fluid related data, different disposal area trap in use
To cacac moth adult quantity, different disposal area check cacac moth dead larvae borer population, time drug effect lasting period.
Methylene chloride used in the present invention is excellent organic solvent, can be completely dissolved the active constituent in medicament
And it is evenly dispersed, be conducive to further obtain evenly dispersed microcapsule formulation；
Urethane-modified isocyanates used in the present invention be wall material, on the one hand its stable structure and have it is tough
Property, help to coat active constituent, on the other hand its property is stablized, and will not influence the chemical property of active constituent, and can
Increase capsule-wall thickness, furthermore urethane-modified isocyanates is lower compared with isocyanates toxicity；
Pyrethroid heavy wall type microcapsule formulations of the present invention field of employment is tobacco first baking cigarette purchase spot, tobacco business public affairs
The tobacco leaf warehouse for taking charge of tobacco leaf central warehouse, tobacco redrying enterprise, effectively kills cacac moth, can be effectively controlled cacac moth insect population
Density reduces tobacco leaf loss.
The mature larva of cacac moth of the present invention has from crawling out in the gap of tobacco leaf packing material, on warehouse wall and stitch
It cocoons at gap, the habit for emergence of pupating.This technology is exactly this biological habit using cacac moth, by pyrethroid
Heavy wall type microcapsule formulation be uniformly sprayed at warehouse wall while and when each support column, when cacac moth larva climbs on the ground
When row, body touches microcapsule formulations, ruptures cyst wall, medical fluid exudation, pyrethroid in cacac moth larva epidermis tissue adhesion
Esters medicament then penetrates into its body interior, and cacac moth larva is killed.
Having the advantages that for heavy wall type microcapsule formulations of the present invention is inexpensive, easy to operate, efficient, the green and lasting period is long.It is quasi-
Cinerins medicament generally has the characteristics that efficient, easy photodegradation, low-residual, and conventional formulation is applied to tobacco leaf warehouse, holding effect
Phase is no more than 3 days, and since cyst wall is relatively thin easily rupturable, the lasting period is no more than 7 days conventional slow release microcapsule formulation, in the present invention
Heavy wall type microcapsule formulations cyst wall used is thicker, is not easily broken, and intracapsular medicament is not easy photodegradation, thus the lasting period up to 30 days with
On.
Medicinal raw material and reagent material as used in the following examples etc., in addition to pyrethroid heavy wall type microcapsule formulations,
Unless otherwise specified, it is commercially available products.
Embodiment 1: in first cured tobacco leaf purchase spot tobacco leaf warehouse using pyrethroid microcapsules to cacac moth
Preventive and therapeutic effect
Southeast somewhere tobacco leaf producing region purchase spot warehouse is implemented at home for experiment.Before medication, first carried out by its routine measure
Keep a public place clean between warehouse operation, and has carried out primary space ULV spraying treatment with ulv spraying device simultaneously.The storehouse library Nei Liangjian is chosen afterwards
Library is as between the processing of pyrethroid microcapsule formulations.Between another two between control storehouse.Between processing be all one-storey house library between compareing, often
Between spatial volume be 1200M3, warehouse direction is that the seat Northern Dynasties is southern, indoor temperature and humidity is consistent, and door and window closes, and is isolated between different storehouses.
The hygienic frequency is consistent during experiment.4 space gyplure veneer insect population numbers are substantially suitable before medication.Quasi- deinsectization is wherein carried out between two
The processing of pyrethroids class microcapsule formulations: being diluted (10-1000) for pyrethroid microcapsule formulation by predetermined extension rate,
With mobile type electric conventional spray device, by reagent spray, warehouse wall and ground junction, ground spray width between processing are
50CM, metope spraying swath are also 50CM.1 cacac moth trapping plate is respectively hung on wall in each warehouse east, west, and (Japanese fuji is fragrant
Smart fragrance company production).Thereafter, it checks within every 3 days insect amount on 1 property trapping plate, and is recorded.Between processing with compare between
Wall edge respectively pinpoint 1m2Cacac moth dead larvae situation is checked using bright light torch.It checks 15 times altogether.Concrete outcome is shown in
Attached drawing 3, table 1:
1 different disposal area of table checks cacac moth dead larvae borer population (3 days/1m2)
From figure 3, it can be seen that in early period, treatment region and check plot the veneer insect population number that is averaged are substantially suitable, until the 5th inspection
When (15 days), check plot traps cacac moth adult quantitative difference with treatment region and widens, (the 7th inspection), control after 21 days
The insect population number in area is nearly 4 times for the treatment of region, and to when the 9th inspection, check plot worm amount reaches peak value, is 5.67 times for the treatment of region.Afterwards
Check plot worm amount gradually declines, but insect amount maintain always be treatment region several times.Illustrate (pyrethroid) microcapsules
Using the insect density that can be effectively reduced processing region, in 45 days entirely checked, it can be seen that microcapsule formulations
Effect.
Cacac moth dead larvae situation is between two adjacent storehouses on selected inspection ground in experiment, when inspection
The both sides for that road wall that two units are separated by exactly are chosen, it is 2 meters long, it is 0.5 meter wide, therefore be 1.0m2, plate is lured in the property looked into every time
On worm amount after, using bright light torch, go through the dead cacac moth dead larvae situation on wall both sides.It can from table
See, at first 9 days, compareing also had dead cacac moth larva on ground, was deposited to ground after illustrating space vapodusting (ULV) processing
Medicament on face still has insecticidal action, with regard to the dead worm of rare discovery cacac moth, but this stage thereafter when checking to the 4th
In, the cacac moth of discovery worm living creeps on the ground, and quantity is much higher than between processing.And between the processing of the other side of wall,
In 14 times entirely checked, it can be seen that dead cacac moth larva, in this process, it can also be seen that in
Poison, the cacac moth larva for taking action abnormal.40 days after treatment, the unstable cacac moth of action can be all arrived, is illustrated after medication
40 days, microcapsule formulation still played effect, and during this, and seen cacac moth is mostly dead larva, even if few
Number cacac moth larva living is also abnormal, shakiness of creeping of taking action.
Embodiment 2: cacac moth mature larva is prevented and treated using microcapsule formulations in first flue-cured tobacco central warehouse
At Sanming, Fujian Province tobacco flow center, No. 52 floor of library of tobacco leaf warehouse are carried out, and are divided to A, B twoth areas, the spatial volume in each area
For 4800M3.Centre has fire resistant doorsets to separate.The area A is handled with pyrethroid microcapsule formulations: by 10-1000 times of preparation diluent,
With electronic conventional spray device by reagent spray in wall and ground junction, ground spray width is 50CM, and metope spraying swath is also
50CM, meanwhile, 1 circle is sprayed around column, spraying wide cut is also ground 50CM, column four sides 50CM.10% efficient chlorine cyanogen of the area B
Pyrethroids water and milk dilutes 100 times of processing.Spraying medical instruments are same as above with spray method.Make every effort in spraying operation by spraying uniformly.Thereafter, every
A area uniformly hangs 5, and based on the cacac moth cartridge type trapping bottle that sex pheromone is lure, (it is Ningbo knob health biology that this, which lures worm bottle,
Co., Ltd's production, wall surrounding respectively hangs 1, center stand column 1 is illustratively using renewing lure after 30 days).Check 1 within every 5 days
It is secondary to lure insect amount in worm bottle；Meanwhile in four weekly check cacac moth larvae alive situation of corner, and fix at 3 points, uses 0.25M2Iron
Reel is placed in ground, the survival condition of cacac moth larva in check box, checks 9 times altogether.In the 8th inspection, collect ground
Worm living takes back indoor storage in face, its survival condition is observed after 7 days.When collection, it is being administered with interior with writing brush gently by cacac moth
Larva living is swept on a scraps of paper, is transferred in the plastic culture dish that diameter is 9CM, and a little addition 5% is placed in culture dish
Yeast powder lotus seed powder.Culture dish is placed in magazine, is stored at room temperature.
Cacac moth larval mortality (3 days/0.25m behind 2 different dosage forms chemicals treatment warehouse surface of table2)
In Fig. 4, testing selected warehouse is room temperature warehouse, and the tobacco leaf degree of twoth area A, B storage and the place of production are essentially identical, institute
With at the initial stage of inspection, the worm amount that two libraries monitor is roughly the same, but when the 4th checks, at high performance aqueous emulsion of cypermethrin
The worm amount trapped in area and the difference of microcapsule formulations treatment region are managed with regard to larger, the total scale of construction of the insect amount of microcapsules treatment region thereafter
Decline is in a platform-like, and aqueous emulsion treatment region is then in rising situation.The cacac moth larva that declaratives creep out is
Success is sprouted wings.And microcapsules processing then controls the insect density of cacac moth adult in library by killing larva.It is not existing together
(table 2) can more illustrate this point in reason area's larval mortality investigation.
As seen from Table 2, first 10 days acted on after medication of high performance aqueous emulsion of cypermethrin, the tobacco powder of post processing zone
Snout moth's larva larval mortality declines rapidly, and drug effect is almost scattered and disappeared；And microcapsule formulation treatment region, 30 days cacac moth childrens after medication
The death rate of worm is also maintained at 70% or more, 40 after medication day, and the cacac moth larval mortality of microcapsules treatment region still exists
50% or more.It is worth noting that, the active matter content of microcapsule formulation is 7.5%, aqueous emulsion 10%, two preparations are with 1:
100 is diluted, that is to say, that microcapsule formulation active matter dosage is lower than aqueous emulsion, but its lasting period is much higher than aqueous emulsion.By
More, the estimation in the dead worm for the cacac moth larva that the discovery of later period during the process of the investigation is found on the wall of microcapsules treatment region
After some larvas contact medicament without rapidly it is lethal, there is certain vigor to climb up wall, but still killed later by medicament.Therefore,
In the 8th investigation, in aqueous emulsion and microcapsules treatment region, 90,87 cacac moth larvas survived are acquired respectively and are carried out
Indoor raising, after 7 days, the larval mortality of aqueous emulsion treatment region is between 1.4-5.7%, and the death of microcapsules treatment region
Rate is then 68.9-89.3%.
It is above-mentioned the results showed that microcapsule formulation as a kind of delay agent in tobacco leaf warehouse, show efficiently,
The feature of lasting period length reduces peculiar smell, also reduces medicament to application simultaneously as active matter wraps up in cyst material more
The stimulation of personnel.
Specific description of embodiments of the present invention above is not intended to limit the present invention, and those skilled in the art can be according to this
Invention is variously modified or deforms, and as long as it does not depart from the spirit of the invention, should belong to the model of appended claims of the present invention
It encloses.
Claims (9)
1. a kind of preparation method for the heavy wall type microcapsule formulations for preventing and treating cacac moth, which comprises the steps of:
A, pyrethroids class raw medicine is dissolved in methylene chloride and obtains mixed solution, then be added into mixed solution urethane-modified
Isocyanates is uniformly mixed as wall material, obtains oily phase；
B, emulsifier is then dissolved in deionized water, obtains water phase under high-shearing dispersion emulsifying machine shearing；
C, oil is mutually slowly added in water phase in step A, shears to obtain the oil/water of homogeneous stability by high speed shear dispersion emulsifying machine
Lotion；
D. the methylene chloride in step B in gained oil/water lotion is removed, then obtains the targeted suspension containing microcapsules, mistake
Filter is dried to obtain heavy wall type pyrethroids class microcapsule formulations.
2. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that institute
It is any one or more in lambda-cyhalothrin, effective cypermethrin, tralomethrin for stating pyrethroids class raw medicine.
3. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that institute
It states pyrethroids class raw medicine and methylene chloride volume ratio is 1:(50~200).
4. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that institute
It states pyrethroids class raw medicine and urethane-modified isocyanates volume ratio is 1:(50~200).
5. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that institute
Stating emulsifier in step B uses Tween-40, Tween-40 and deionized water according to mass ratio 1:(10~50) proportion, it is cut using height
The high-rate of shear that dispersion emulsifying machine is cut in 6000-10000r/min obtains water phase.
6. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that institute
It states oil in step C and is mutually slowly added to water phase, oil is mutually and water phase is according to mass ratio 1:1, by being existed with high-shearing dispersion emulsifying machine
The high-rate of shear of 6000-10000r/min obtains the oil/water lotion of homogeneous stability.
7. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that
Oil/water lotion is added in vacuum type rotation evaporator in the step D, is opened vacuum type rotation evaporator and is removed dichloro
Methane obtains the targeted suspension containing microcapsules.
8. the preparation method of the heavy wall type microcapsule formulations of prevention and treatment cacac moth according to claim 1, which is characterized in that
1~800 μm of microcapsule granule of partial size is obtained in the filter of oil/water lotion in the step C, 5~10 μm of microcapsule granule wall thickness.
9. the control method of the heavy wall type microcapsule formulations of cacac moth is prevented and treated described according to claim 1~any one of 4, it is special
Sign is, includes the following steps:
1) after heavy wall type microcapsule formulations obtained in claim 1, are diluted 10~1000 times, mobile type electric sprayer is added
In, it is configured to cacac moth sprinkling medical fluid；
2), microcapsule formulation medicine liquid spray in the wall edge in tobacco barn library, each support post edges and is defended in tobacco leaf warehouse
Life and death angle；
3), the ground in step 2) within the distance range of tobacco leaf warehouse surroundings wall and 30~50cm of support column and metope
Upper uniformly sprinkling heavy wall type microcapsule formulations medical fluid, ground spray width are 50CM, and metope spraying swath is also 50CM, when spraying operation,
Movement speed is consistent, and spraying wide cut is consistent, guarantees equably spraying；
4), follow-up observation and record cacac moth sprinkling medical fluid related data, different disposal area trap in use
Cacac moth adult quantity, different disposal area check cacac moth dead larvae borer population, time drug effect lasting period.
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