MXPA98000149A - Preparation liquid insecticide for thermal fumigation and method for repressing insects by fumigation term - Google Patents
Preparation liquid insecticide for thermal fumigation and method for repressing insects by fumigation termInfo
- Publication number
- MXPA98000149A MXPA98000149A MXPA/A/1998/000149A MX9800149A MXPA98000149A MX PA98000149 A MXPA98000149 A MX PA98000149A MX 9800149 A MX9800149 A MX 9800149A MX PA98000149 A MXPA98000149 A MX PA98000149A
- Authority
- MX
- Mexico
- Prior art keywords
- preparation
- carbon atoms
- insecticidal
- liquid
- weight
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 92
- 230000000749 insecticidal Effects 0.000 title claims abstract description 74
- 239000007788 liquid Substances 0.000 title claims abstract description 53
- 238000003958 fumigation Methods 0.000 title claims abstract description 31
- 241000238631 Hexapoda Species 0.000 title claims abstract description 17
- 239000002917 insecticide Substances 0.000 title claims abstract description 11
- 230000000754 repressing Effects 0.000 title description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 95
- 125000004432 carbon atoms Chemical group C* 0.000 claims abstract description 58
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 41
- 125000004429 atoms Chemical group 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 230000002745 absorbent Effects 0.000 claims description 11
- 239000002250 absorbent Substances 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000002728 pyrethroid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract 2
- 239000002904 solvent Substances 0.000 description 31
- NDJKXXJCMXVBJW-UHFFFAOYSA-N Heptadecane Chemical compound CCCCCCCCCCCCCCCCC NDJKXXJCMXVBJW-UHFFFAOYSA-N 0.000 description 8
- RZJRJXONCZWCBN-UHFFFAOYSA-N Octadecane Chemical compound CCCCCCCCCCCCCCCCCC RZJRJXONCZWCBN-UHFFFAOYSA-N 0.000 description 6
- YCOZIPAWZNQLMR-UHFFFAOYSA-N Pentadecane Chemical compound CCCCCCCCCCCCCCC YCOZIPAWZNQLMR-UHFFFAOYSA-N 0.000 description 6
- 241000255925 Diptera Species 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- LQERIDTXQFOHKA-UHFFFAOYSA-N Nonadecane Chemical compound CCCCCCCCCCCCCCCCCCC LQERIDTXQFOHKA-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- DCAYPVUWAIABOU-UHFFFAOYSA-N Hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 3
- 230000001058 adult Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229940038384 octadecane Drugs 0.000 description 3
- FSYXMFXBRJFYBS-UHFFFAOYSA-N Furamethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=CC=C(CC#C)O1 FSYXMFXBRJFYBS-UHFFFAOYSA-N 0.000 description 2
- CBFCDTFDPHXCNY-UHFFFAOYSA-N Icosane Chemical compound CCCCCCCCCCCCCCCCCCCC CBFCDTFDPHXCNY-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011877 solvent mixture Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- RLLPVAHGXHCWKJ-HKUYNNGSSA-N (3-phenoxyphenyl)methyl (1R,3R)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate Chemical compound CC1(C)[C@@H](C=C(Cl)Cl)[C@H]1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 RLLPVAHGXHCWKJ-HKUYNNGSSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N Aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 1
- CZBZUDVBLSSABA-UHFFFAOYSA-N Butylated hydroxyanisole Chemical compound COC1=CC=C(O)C(C(C)(C)C)=C1.COC1=CC=C(O)C=C1C(C)(C)C CZBZUDVBLSSABA-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000144210 Culex pipiens pallens Species 0.000 description 1
- YUGWDVYLFSETPE-JLHYYAGUSA-N Empenthrin Chemical compound CC\C=C(/C)C(C#C)OC(=O)C1C(C=C(C)C)C1(C)C YUGWDVYLFSETPE-JLHYYAGUSA-N 0.000 description 1
- 239000005896 Etofenprox Substances 0.000 description 1
- YREQHYQNNWYQCJ-UHFFFAOYSA-N Etofenprox Chemical compound C1=CC(OCC)=CC=C1C(C)(C)COCC1=CC=CC(OC=2C=CC=CC=2)=C1 YREQHYQNNWYQCJ-UHFFFAOYSA-N 0.000 description 1
- 229950005085 Etofenprox Drugs 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229960000490 Permethrin Drugs 0.000 description 1
- SBNFWQZLDJGRLK-UHFFFAOYSA-N Phenothrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 SBNFWQZLDJGRLK-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- HPYNBECUCCGGPA-UHFFFAOYSA-N Silafluofen Chemical compound C1=CC(OCC)=CC=C1[Si](C)(C)CCCC1=CC=C(F)C(OC=2C=CC=CC=2)=C1 HPYNBECUCCGGPA-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- DDVNRFNDOPPVQJ-HQJQHLMTSA-N Transfluthrin Chemical compound CC1(C)[C@H](C=C(Cl)Cl)[C@H]1C(=O)OCC1=C(F)C(F)=CC(F)=C1F DDVNRFNDOPPVQJ-HQJQHLMTSA-N 0.000 description 1
- HWKQNAWCHQMZHK-UHFFFAOYSA-N Trolnitrate Chemical compound [O-][N+](=O)OCCN(CCO[N+]([O-])=O)CCO[N+]([O-])=O HWKQNAWCHQMZHK-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 230000024126 agglutination involved in conjugation with cellular fusion Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002421 anti-septic Effects 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000019282 butylated hydroxyanisole Nutrition 0.000 description 1
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000003641 microbiacidal Effects 0.000 description 1
- 239000002855 microbicide agent Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229960003536 phenothrin Drugs 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- -1 resminent Chemical compound 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000002195 synergetic Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Abstract
A liquid insecticidal preparation comprising (a) a component with activity, (b) at least one component of normal paraffins having 16 to 20 carbon atoms, and (c) at least one hydrocarbon selected from isoparaffin hydrocarbons having 10 to 15 atoms of carbon and naphthenic hydrocarbons having 10 to 15 carbon atoms, and a method and apparatus to suppress insects by thermal fumigation of the liquid insecticidal preparation, could achieve a stable fumigation of the preparation and the component with activated insecticide, while maintaining the effect insecticide for long time
Description
PREPARATION LIQUID INSECTICIDE FOR THERMAL FUMIGATION AND METHOD TO REPRESS INSECTS BY THERMAL FUMIGATION
BACKGROUND OF THE INVENTION
1. Field of the invention The present invention relates to a liquid insecticidal preparation for thermal fumigation and a method for controlling insects by thermal fumigation.
2) Related technique In such a conventional method for fumigating a thermal liquid insecticide preparation, which comprises immersing a part of an absorbent wick in the liquid insecticidal preparation, thereby absorbing the preparation in the wick, and heating a part of the wick differently. of the part submerged in the preparation, thereby fumigating the absorbed preparation, it is difficult to achieve stable fumigation of the preparation for a long time with a stable insecticidal effect due to changes in the composition of the preparation in the course of thermal fumigation, etc., and therefore it is desirable to develop a liquid preparation for thermal fumigation
REF-: 26501 capable of stable fumigation with a stable insecticidal effect. On the other hand, such document J-PA-7-196418 proposes to use 10 to 70% by weight Isoparaffin hydrocarbon (s) and / or naphthenic hydrocarbon (s), each one component of which has an of boiling point from 250 ° C to 350 ° C in addition to normal paraffin (s) having a boiling range from 200 ° C to 300 ° C as an oily solvent in a liquid insecticidal preparation for thermal fumigation, comprising 0.3 to 5.0% by weight of furamethrin, alethrin, praletrin or benfluthrin
(transfluthrin) as a component with insecticidal activity, when dissolved in the oily solvent, but the proposed liquid insecticidal preparation is not always satisfactory in terms of fumigation stability in the initial and final periods of thermal fumigation.
BRIEF DESCRIPTION OF THE INVENTION An object of the present invention is to solve the aforementioned problem by employing a liquid preparation comprising a component with insecticidal activity dissolved in isoparaffin hydrocarbon (s) having 10 to 15 atoms of carbon and / or naphthenic hydrocarbon (s) having 10 to 15 carbon atoms, together with at least one component of normal paraffins having 16 to 20 carbon atoms, thus allowing stable fumigation of the preparation insecticide and the component with insecticidal activity, while maintaining the stable insecticidal effect for a long time. According to one aspect of the present invention, there is provided a liquid insecticidal preparation, comprising (a) a component with insecticidal activity, (b) at least one component of normal paraffins having 16 to 20 carbon atoms and (c) at least one hydrocarbon selected from isoparaffin hydrocarbons having 10 to 15 carbon atoms and naphthenic hydrocarbons having 10 to 15 carbon atoms. According to another aspect of the invention, there is provided a liquid insecticidal preparation for thermal fumigation intended to be used in a method for controlling insects by thermal fumigation, which comprises immersing a part of an absorbent wick in a liquid insecticide preparation, absorbing this the preparation in the wick, and heating a part of the wick other than the submerged part in the preparation, fumigating in this way the absorbed preparation in which a component with insecticidal activity is dissolved in at least one hydrocarbon selected from isoparaffin hydrocarbons that have 10 to 15 carbon atoms, together with at least one component of normal paraffins having 16 to 20 carbon atoms, and a method and apparatus for controlling insects by thermal fumigation, using the liquid insecticidal preparation. During fumigation, the present liquid insecticidal preparation can be fumigated in a stable manner for a long time with a stable insecticidal effect.
DETAILED DESCRIPTION OF THE INVENTION
The pyrethroid compounds can preferably be used in the present invention as a component with insecticidal activity from the viewpoints of insecticidal effect, safety, etc., and include, for example, alethrin, praletrin, furamethrin, empenthrin, resminent, phenothrin, permethrin, trans -flutrin, teralethrin, silafluofen, etofenprox, l-ethynyl-2-fluoro-2-pentenyl 3- (2, 2-dichloro-vinyl) -2,2-dimethylcyclopropane-carboxylate, etc. Usually 0.1 to 5.0% by weight, preferably 0.5 to 2% by weight, of the pyrethroid compound is used based on the present liquid insecticidal preparation. Normal paraffins having 16 to 20 carbon atoms face use in the present invention include, for example, straight chain alkanes such as hexadecane, heptadecane, octadecane, nonadecane and eicosane and mixtures thereof. Usually 5 to 45% by weight, preferably 8 to 40% by weight, of the normal paraffin is used based on the present liquid insecticidal preparation. Isoparaffin hydrocarbons having 10 to 15 carbon atoms (saturated hydrocarbons having side chain (s) for use in the present invention include, for example Isopar M (trademark of a hydrocarbon solvent consisting of Isoparaffin hydrocarbons having 12 to .15 carbon atoms as major components, commercially available from Exxon Chemical Co., USA), isopar L (a brand of a solvent consisting of hydrocarbons constituted by isoparaffin hydrocarbons having 11 to 13 carbon atoms as main components, available commercially available from Exxon Chemical Co., USA), isopar H, trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 11 and 12 carbon atoms as major components, commercially available from Exxon Chemical Co., USA. ), Isopar G (commercial brand of a hydrocarbon solvent consisting of 10 and 11 carbon atoms, commercially available) e from Exxon Chemical Co., USA), solvent IP 1620 (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 10 to 15 carbon atoms as major components, commercially available from Ide itsu Petrochemical Co., Japan), Nisseki Isosol 300 (commercial brand of hydrocarbon solvent consisting of isoparaffin hydrocarbons having 10 to 13 carbon atoms as main components, commercially available from Nippon Petrochemnical Co., Japan), Shellsol 71 (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons) having 10 to 12 carbon atoms as major components, commercially available from Shell Japan Co., Japan), Shellsol 72 (trademark of a hydrocarbon solvent consisting of isoparaffinic hydrocarbons having 10 to 12 carbon atoms as main components, commercially available from Shell Japan Co., Japan), Merveille 40 (brand name commercial of a hydrocarbon solvent consisting of isoparaffinic hydrocarbons having from 11 to 15 carbon atoms as main components, commercially available from Showa Kasei kk, Japan), Merveille 30 (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 10 to 12 atoms of carbon atoms as major components, commercially available from Showa Kasei kk, Japan), etc.
Naphthenic hydrocarbons have 10 to 15 carbon atoms (cycloparaffins; saturated cyclic hydrocarbons) for use herein include, for example, Nisseki Napthesol H (trademark of a hydrocarbon solvent consisting of a naphthenic hydrocarbon having 15 carbon atoms as the main component , commercially available from Nippon Petrochemical Co., Japan), Nisseki Napthesol M (trademark of a hydrocarbon solvent consisting of naphthenics having 12 and 13 carbon atoms as main components, commercially available from Nippon Petrochemical Co., Japan), Nisseki Naphthesol L (trademark of a hydrocarbon solvent consisting of naphthenic hydrocarbons having 10 and 11 carbon atoms as main components, commercially available from Nippon Petrochemical Co., Japan), AF Solvent 4 (trademark of a hydrocarbon solvent consisting of a naphthenic hydrocarbon having 14 carbon atoms as a main component, commercially available from Nippon Oil Co., Japan), Shellsol D-70 (trade mark of a hydrocarbon solvent consisting of naphthenic hydrocarbons) having 12 and 13 carbon atoms as major components, commercially available from Shell Japan, Co., Japan), etc. Additionally, hydrocarbon solvents comprising Isoparaffin hydrocarbons having 10 to 15 carbon atoms and naphthenic hydrocarbons having 10 to 15 carbon atoms as major components, such as Exxol D-80 (trade mark of a hydrocarbon solvent consisting of naphthenic hydrocarbons having 10 to 13 carbon atoms and isoparaffin hydrocarbons having 10 to 13 carbon atoms as major components, commercially available from Exxon Chemical Co., USA), Exxol D-110 (trademark of a hydrocarbon solvent consisting of a hydrocarbon naphthenic having 15 carbon atoms an Isoparaffin hydrocarbon having 15 carbon atoms as major components, commercially available from Exxon Chemical Co., USA), etc. They can be used in the present invention. The present liquid insecticidal preparation contains one or more isoparaffinic hydrocarbons having 10 to 15 carbon atoms and / or one or more naphthenic hydrocarbons having 10 to 15 carbon atoms as the main component, and usually 50 to 98% is used in the process. at least one hydrocarbon selected from isoparaffin hydrocarbons and naphthenic hydrocarbons based on the present liquid insecticidal preparation.
In addition to the insecticidally active component, the normal paraffin having 16 to 20 carbon atoms and the isoparaffinic hydrocarbon (s) having 10 or 15 carbon atoms and / or the naphthenic hydrocarbons having 10 to 15 carbon atoms. , the present liquid insecticidal preparation may contain, if desired, a microbicide, a synergistic agent, an aromatic compound, etc., or may additionally contain a phenolic stabilizer such as BHT, BHA, etc., a stabilizer such as a UV absorber. from the benzophenone series, from the benzotriazole series, etc. and a volatilization control agent such as esters, etc. The present method for controlling insects by thermal fumigation is very effective in exterminating various harmful insects including unhealthy insects such as mosquitoes, flies, etc., when applied to an apparatus of the thermal fumigation type to suppress insects, as described in FIG. JP-B-2-25885, which is incorporated herein by reference. Materials for an absorbent wick intended for use in the present invention are usually porous materials, including, for example, inorganic powders such as clay, kaolin, talc, diatomaceous earth, gypsum, perlite, bentonite, acid clay, glass fibers , asbestos, etc., or heat-resistant polymer resin powders, which are agglutinated and molded with a binding agent such as carboxymethylcellulose, starch, gum arabic, gelatin, polyvinyl alcohol, etc., followed by calcination, if desired. Additionally, heat-resistant polymer resin powders which are coagulated with thermoplastic resin can also be used. The absorbent wick may contain a pigment, an antiseptic, etc., if desired. The absorbent wick may be heated to a temperature between about 110 ° C and about
160 ° C, preferably from 120 ° C to 135 ° C indirect thermal with a circular heater such as an electric heater.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 I show an example of an apparatus applicable to the present method to suppress insects by thermal fumigation; fig. 2A shows an apparatus used in the Test Example; and fig. 2B shows a top view of the ring of Fig. 2A.
PREFERRED MODALITIES OF THE INVENTION
The present invention will be described in detail below, with reference to Examples. First, examples of preparation of the liquid insecticidal preparations present for thermal fumigation will be given below:
Preparation Example 1
1.7 parts in. Weight of praletrin and 20 parts by weight of heptadecane were dissolved in Isopar M (trademark of a hydrocarbon solvent consisting of isoparfinic hydrocarbons having 12 to 15 carbon atoms as main components, commercially available from Exxon Chemical Co., USA. ) to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation was obtained.
Preparation Example 2
1.7 parts by weight of praletrin and 30 parts by weight of heptadecane were dissolved in Exxol D-80 (trade mark of a hydrocarbon solvent comprising 45 to 50% by weight of naphthenic hydrocarbons having 10 or 13 carbon atoms and approximately 35% by weight of isoparaffin hydrocarbons having 10 to 13 carbon atoms, commercially available from Exxo Co., USA) to give a total of 100 parts by weight, whereby the present liquid preparation was obtained.
Preparation Example 3
1.7 parts by weight of praletrin and 10 parts by weight of octadecane were dissolved in isopar M to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation was prepared.
Preparation Example 4
1.7 parts by weight of praletrin and 10 parts by weight of nonadecane were dissolved in Isopar M to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation was obtained.
Preparation Example 5
1.0 parts in cesarean of praletrin and 40 parts by weight of hexadecane are dissolved in isopar L (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 11 to 10 carbon atoms as main components, commercially available from Exxon Chemical Co. , USA) to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation is obtained.
Preparation Example 6
1.3 parts by weight of praletrin and 45 parts by weight of hexadecane are dissolved in a solvent mixture comprising 25 parts by weight of isopar H (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 11 and 12 carbon atoms) as major components, commercially available from Exxon Chemical Co., USA) and Isopar G (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 10 and II carbon atoms as major components, commercially available from Exxon
Chemical Co., USA) to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation is obtained.
Preparation Example 7 1.5 parts by weight of praletrin and 30 parts by weight of heptadecane are dissolved in a solvent mixture comprising 30 parts by weight of Shellsol 71 (trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 10 to 12 carbon atoms as main components, commercially available from Shell Japan Co., Japan) and Shellsol 72
(trademark of a hydrocarbon solvent consisting of isoparaffin hydrocarbons having 11 to 15 carbon atoms as the main components, commercially available from Shell Japan Co., Japan) to give a total of 100 parts by weight, thereby obtaining the present liquid preparation.
Preparation Example 8
2.0 parts by weight of praletrin and 5 parts by weight of octadecane are dissolved in Shellsol 72 to give a total of 100 parts by weight, whereby the present liquid insecticidal preparation is obtained.
Preparation examples of liquid insecticidal preparations for use in the comparison in the following Test Example will be given below as Reference Examples.
Reference Example 1
1.7 parts by weight of praletrin and 20 parts by weight of pentadecane were dissolved in Exxon D-130 (trade mark of a hydrocarbon solvent comprising naphthenic hydrocarbons having not less than 16 carbon atoms as main components, commercially available from Exxon Chemical Co., USA) to give a total of 100 parts in parts by weight, whereby a liquid comparison preparation was obtained.
Reference Example 2
1.7 parts by weight of praletrin and 40 parts by weight of pentadecane were dissolved in Exxon D-130 to give a total of 100 parts by weight, whereby another comparative insecticide preparation was obtained.
Reference Example 3
1.7 parts by weight of praletrin were dissolved in
Neothiosol (trademark of normal paraffins having 12 to 15 carbon atoms, commercially available from Chuo Kasei K.K., Japan) to give a total of 100 parts by weight, thereby obtaining another comparative liquid insecticide preparation. Next, the Test Example will be given:
Test Example
The preparations obtained in the preparation examples 1 to 4 were each and every one in respective containers, each one component of which had a capacity of 45 ml in respective apparatuses of thermal fumigation type, for repression of the insects, being provided each a component of the apparatuses of an absorption wick (porous materials obtained by agglutination of inorganic powders with a paste, as shown in Fig. 1, in which the number 1 shows a liquid insecticide preparation, 2 a circular heater, 3 an absorbent wick and 4 a container for the preparation 1, and the lower part of the absorbent wick 3 is immersed in the preparation 1 to absorb the preparation 1 in the wick 3, the upper part of the wick 3 being heated by the circular heater 2. For the tests, an apparatus such as shown in fig. 2A. In two glass tubes 11, 4 cm in diameter and 12 cm in height, 10 female adult mosquitoes (Culex pipiens pallens) were introduced in each case. Next, both ends of each one component of the glass tubes 11 were closed with a nylon net. The glass tubes were placed in a cylindrical shell of plastic material 12, 20 cm in diameter and 30 cm high, provided on the bottom with a metal ring 13 integral with a metal plate 17, approximately 5 cm wide, which had individual tapered holes 16 for securing the glass tubes 11 while fixing the glass tubes 11 to the tapered holes 16, respectively. A metallic cylinder 14, 20 cm in diameter and 80 cm in height, is provided at the bottom end of the cylindrical cover 12. The thermal fumigation type apparatus 15 for controlling insects, as shown in FIG. 1 and as mentioned above, which had been previously heated, was disposed at the bottom of the metal cylinder 14. The upper part of the absorbent wick was indirectly heated at 120-135 ° C. The number of adult female mosquitoes killed in this way was counted at different time intervals such as 5 hours, 105 hours, 205 hours, 305 hours and 605 hours after the start of the test and the KT50 values were calculated (the time in minutes required to kill 50% of adult mosquito females) by Probit analysis.
The comparative test was also carried out for the liquid insecticidal comparison preparation obtained by the reference examples. The results are shown in the table. TABLE
as evident from the Table above, minor insecticidal effects were observed overall with the liquid insecticidal comparison preparations of Reference Examples 1 and 2, which used pentadecane having a boiling point of 270 ° C and Exxol D-130 which has a boiling range of 277 ° C to 310 ° C (see JP-A-7-196418), the insecticidal effects were considerably reduced in particular in the initial and final periods, and a considerable decrease was also observed of the insecticidal effect in the final period with the liquid insecticidal comparison preparation of Reference Example 3 which used only normal paraffins as a solvent. In contrast, the present liquid preparations of Preparation Examples 1 to 4 were able to maintain a substantially constant insecticidal effect. According to the present method for controlling insects by thermal fumigation of the present liquid insecticidal preparation, the liquid insecticidal preparation can be stably fumigated for a long time and a stable insecticidal effect can be obtained.
Claims (9)
1. An insecticidal preparation, characterized in that it comprises (a) a component with insecticidal activity, (b) at least component of normal paraffins having 16 to 20 carbon atoms, and (c) at least one hydrocarbon selected from isoparaffin hydrocarbons having 10 to 15 carbon atoms and naphthenic hydrocarbons having 10 to 15 carbon atoms.
2. - A liquid insecticidal preparation for thermal fumigation to be used in a method for controlling insects by thermal fumigation, characterized in that it comprises immersing a part of an absorbent wick in a liquid insecticidal preparation, thereby absorbing the preparation in the wick, and heating a part of the wick other than the part submerged in the preparation, thereby fumigating the absorbed preparation, characterized in that the preparation comprises a component with insecticidal activity dissolved in at least one hydrocarbon selected from isoparaffin hydrocarbons having 10 to 15 carbon atoms and hydrocarbons naphthenics having 10 to 15 carbon atoms, together with at least one component of paraffins having 16 to 20 carbon atoms.
3. - A liquid insecticidal preparation according to claim 1 or 2, characterized in that the normal paraffin (s) having 16 or 20 carbon atoms are used in an amount of 5 to 45% by weight based on the total sum of the liquid preparation.
4. - A liquid insecticidal preparation according to claims 1, 2 or 3, characterized in that the component with insecticidal activity is a pyrethroid compound.
5. - A liquid insecticidal preparation according to any one of claims 1 to 4, characterized in that 0.1 to 5% by weight of the component with insecticidal activity and 5 to 45% by weight of the normal paraffin (s) are used. to 20 carbon atoms, based on the sum total of the liquid insecticidal preparation.
6. An insecticidal preparation according to any one of claims 1 to 4, characterized in that 0.5 to 2% by weight of the component with insecticidal activity, 8 to 40% by weight of the normal paraffin having 16 to 20 atoms are used. carbon and 50 to 98% by weight of at least one hydrocarbon selected from isoparaffin hydrocarbons having 10 to 15 carbon atoms and naphthenic hydrocarbons having 10 to 15 carbon atoms, based on the sum total of the preparation liquid insecticide.
7. - A liquid insecticidal preparation according to any one of claims 1 to 6, characterized in that the component with insecticidal activity is praletrin.
8. - A method for controlling insects by thermal fumigation, which comprises immersing a part of an absorbent wick in a liquid insecticidal preparation, thereby absorbing the preparation in the wick, and heating a part of the wick other than the submerged part in the preparation , fumigating in this way the absorbed preparation, characterized in that the liquid insecticidal preparation is any one of claims 1 to 7.
9. - An apparatus of the thermal fumigation type to suppress insects by immersing a part of an absorbent wick in a liquid insecticidal preparation, thereby absorbing the preparation in the wick, and heating a part of the wick other than the part submerged in the wick. preparation, fumigated in this way the absorbed preparation, characterized in that the liquid insecticidal preparation is any one of claims 1 to 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08-343452 | 1996-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98000149A true MXPA98000149A (en) | 1999-02-24 |
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