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Dokumentenidentifikation EP1347682 22.11.2007
EP-Veröffentlichungsnummer 0001347682
Titel TERMITENKÖDERZUSAMMENSETZUNG UND -VERFAHREN
Anmelder Whitmire Micro-Gen Research Laboratories, Inc., St. Louis, Mo., US
Erfinder RICHARDSON, Ronald O., Ellisville, MO 63011, US;
KERN, Robin L., Fenton, MO 63026, US
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60130921
Vertragsstaaten AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE, TR
Sprache des Dokument EN
EP-Anmeldetag 11.12.2001
EP-Aktenzeichen 019900836
WO-Anmeldetag 11.12.2001
PCT-Aktenzeichen PCT/US01/47636
WO-Veröffentlichungsnummer 2002052940
WO-Veröffentlichungsdatum 11.07.2002
EP-Offenlegungsdatum 01.10.2003
EP date of grant 10.10.2007
Veröffentlichungstag im Patentblatt 22.11.2007
IPC-Hauptklasse A01N 25/12(2006.01)A, F, I, 20051017, B, H, EP
IPC-Nebenklasse A01N 25/00(2006.01)A, L, I, 20051017, B, H, EP   A01N 43/90(2006.01)A, L, I, 20051017, B, H, EP   A01N 47/34(2006.01)A, L, I, 20051017, B, H, EP   A01N 51/00(2006.01)A, L, I, 20051017, B, H, EP   

Beschreibung[en]
Background of the Invention

This invention relates to termite bait compositions and methods for controlling termites and, more particularly, to such compositions and methods which employ a powdered cellulosic attractant having a particle size in the range of 1 to 100 micrometers.

In the prior art, the use of chemical attractants and feeding stimulants have been known to enhance the efficacy of insect or termite bait compositions by increasing the attraction to or increasing the ingestion rate of insect or termite baits. Thus, the prior art teaches the use of bait attractants comprised of paper, wood or other cellulose derived materials and such bait attractants have assumed the physical form of wooden blocks, saw dust, shredded paper or cardboard. The active termite killing agent or ingredient is generally incorporated into such baits by known methods such as absorption, blending or other conventional formulating means. Reference is made to U.S. patent nos. 4,363,798 , 5,609,879 , 5,802,779 , 5,820,855 and 5,937,571 for disclosures relating to prior art termite bait compositions and methods for controlling termites.

Additional prior art methods for controlling termites and bait compositions are disclosed in GB 1597293 , US 4582901 , US 6139858 , EP 587117 , WO 00/62610 and JP2000-007516 .

GB 1597293 discloses a bait for killing termites which comprises a paste-like mixture of a cellulose material in finely divided form so as to be acceptable as a food for termites, a second toxic material included with the cellulose material and having a delayed lethal effect on termites but no significant immediate lethal effects on the termites which ingest the bait, the bait being such that the toxic material is taken up by the termites with the cellulose material and is transmitted by natural process to other termites in a colony at which time the delayed lethal effect of the toxic material occurs. The toxic material is selected from arsenic compounds in finely divided form, cyclobuta (cd) pentalene soaked into the cellulose material, a microencapsulated halogenated polycyclic insecticide from the class di-methano-naphthalene (except dieldrin) and microencapsulated insecticides comprising synthetic pyrethroids, chlordane, parathion, malathion and heptachlor.

In US 4582901 , a cellulose based termite bait is provided in which cellulose is modified by the provision of up to 5% by weight of fluorinated ester groups. This bait material is substantially indistinguishable from cellulose by termites seeking food but is sufficiently toxic to them to be utilizeable as a highly efficient termiticide while being relatively harmless to mammals.

US 6139858 provides a termite-controlling agent which comprises 5-tert-butyl-2-[2-(2,6-difluorophenyl)-4,5-dihydrooxazol-4-yl]phenetole as an active ingredient and cellulose, which can be a sheet formulation or a powdery formulation.

EP 587117 discloses compositions and methods of monitoring for termites and a method of controlling termites if infestation has occurred. This method utilizes the natural foraging and other social behaviors of the termite to collect and distribute a bait formulation that is preferred by termites.

WO 00/62610 provides termite foods mixed together in a matrix which are suitable for use as baits and attractants for termites. This termite matrix is preferred by termites over naturally-occurring foods such as deadwood, trees and wood used in human constructions, and other known termite matrices. It comprises cellulose, water and termite-preferred nutrients. Methods of monitoring the presence of termites using such matrices, and methods of controlling termites using such matrices to deliver termite toxins are also provided.

JP2000-007516 provides a termite-bait composition for controlling termites which is substantially free from ureide. The bait comprises an effective amount of a poison having termiticidal activities, optionally about 0.5-2.0 wt.% agar and about 88-99% high palatability cellulose which is selected from birch, decayed birch, partially decayed birch, processed cellulose, purified cellulose or mixtures thereof.

The prior art is devoid of any mention of the use of powdered microcrystalline cellulose attractants of a particle size less than 100 micrometers.

Summary, of the Invention

Among the several objects of the invention may be noted the provision of a termite bait composition and method for controlling termites in which a powdered cellulosic dust having a particle size in the range of 1 to 100 micrometers is employed as an attractant; the provision of such a termite bait composition and method in which the use of such a cellulosic attractant promotes increased ingestion and consequent exposure of termites to termite controlling or killing agents; the provision of such a termite bait composition and method in which such a cellulosic attractant permits better adherence of the composition to termites thereby increasing the prospects for introduction of the termite controlling or killing agent back to the termite colony by contact and grooming; and the provision of such a termite bait composition and method which may be readily and economically practiced for improved control of termites. Other objects will be in part apparent and in part pointed out hereinafter.

Briefly, the present invention is directed to a termite bait composition comprising a powdered cellulosic attractant having a particle size in the range of 1 to 100 micrometers and a termite killing agent carried by or within the attractant. The invention is also directed to a method for controlling termites which comprises applying to a termite infested area the above-noted termite bait composition. The invention is further directed to a termite bait composition package for use in a termite bait station comprising the above-noted termite bait composition contained within a closed cellulosic package.

Description of the Preferred Embodiments

In accordance with the present invention, it has now been found that an improved termite bait composition is provided by utilizing as an attractant a powdered cellulosic material having a particle size in the range of 1 to 100 micrometers with a termite killing or controlling agent being carried by or within the attractant. By using powdered cellulosic material of this small particle size as an attractant, it has been found that the resulting termite bait composition leads to increased ingestion since the termites may more easily ingest material of this small particle size. The fine particle size of the termite bait composition of the invention also improves physical exposure by better adhering to termite bodies through static electrical charge. Thus, the fine powdered bait composition containing the termiticide or killing agent more readily adheres to the termites and is carried back to the nest where it becomes distributed throughout the colony by contact and grooming. The bait composition and method of the present invention thereby lead to improved control of termite colonies through the increased ingestion by termites and better adherence to termites of the bait composition by reason of the employment of powdered cellulosic material of small particle size as an attractant.

For use as the attractant in the practice of the invention, any cellulosic material having a particle size within the range of 1 to 100 micrometers may be employed. The dust or powdered attractant of this particle size may be cellulose, microcrystalline cellulose, paper or mixtures thereof. The preferred cellulosic material for use as the attractant in the present invention is microcrystalline cellulose such as that marketed under the trade designation "LatticeRTM NT-020 Microcrystalline cellulose" having an average particle size of 20 micrometers (FMC Corporation). It will be understood that other cellulosic materials having a particle size within the range of 1 to 100 micrometers, preferably 20 to 100 micrometers and more preferably 20 to 50 micrometers, may also be used in the practice of the invention.

Any known termite killing or controlling agent or termiticide can also be used in the practice of the invention. These include chitin synthesis inhibitors such as hexaflumuron, flufenoxuron, lufenuron and dimilin, juvenile hormone mimics such as methoprene and pyriproxyfen, stomach toxicants such as sulfuramide, abamectin, cryolite, boric acid and alkali and alkaline earth salts of boric acid, and contact insecticides such as thiamethoxam, imidicloprid and fipronil, or mixtures or combinations of these agents. The particle size of the termite killing agent employed may vary over a wide range, but is preferably of the same order as the particle size of the cellulosic attractant discussed above. The use of dimilin as the termite killing agent is preferred and the highly preferred particle size range for dimilin is 2 to 5 micrometers. The termite killing or controlling agent may be present in the bait composition in various concentrations such as 0.1 to 1% by weight.

In preparing the termite bait compositions of the invention, the termite killing agent or termiticide utilized is generally incorporated into the particular cellulosic attractant employed by absorption, blending or other conventional formulating means. As thus prepared, the termite killing agent is carried by or within the cellulosic attractant.

In another embodiment of the invention, the termite bait composition may be compressed into tablets or granular form for placement in a termite bait station.

In a further embodiment of the invention, the termite bait composition of the invention prepared as described above is packaged in a termite attractive package such as a paper bag, cardboard tube or other cellulosic container which may then be dropped into or placed in a termite bait station without being opened. In this embodiment, termites eat through the cellulosic package material and thereby gain access to the bait composition contained therein. The use of the package for the bait composition enables the powdered bait composition to be maintained in a fresh condition until it is used and also renders handling of the packaged bait composition safer since the user is not required to come into direct contact with the killing agent or toxicant in the packaged bait composition.

The following examples illustrate the practice of the invention.

Example 1

The following formulations were tested to determine their relative efficacy as termite bait attractants: Formulation No. Formulation 017 Portabella mushrooms/ microcrystalline cellulose 018 Button mushrooms/microcrystalline cellulose 019 Shittake mushrooms/microcrystalline cellulose 020 Button mushrooms/microcrystalline cellulose/powdered chicken fat 022 Portabella mushrooms 023 Button mushrooms 024 Shittake mushrooms 025 Microcrystalline cellulose 053 Microcrystalline cellulose/powdered chicken fat 054 Solka Flock (chopped up noncrystailized cellulose) Wood control Pine wood
The microcrystalline cellulose used had an average particle size of 20 micrometers and the Solka FlockRTM used had an average particle size in the range of 20 to 100 micrometers.

The tests were conducted using a choice test arena arrangement in which eight feeding chambers surround a central termite chamber in a wheel configuration with tubes extending from the central chamber to each of the feeding chambers or bait stations. One feeding chamber was left empty for these 7-way tests. There were three combinations of the 11 termite bait attractants presented simultaneously to a group of termites (Reticulitermes flavipes (Kollar)). Each combination included pine wood as one choice (the control or standard food) and only one bait (054) was presented in each of the three combinations. There were four replicates of each combination of bait attractants.

The following table summarizes the results of the tests in terms of termite feeding rates (mg of bait removed/g of termite/day). FEEDING RATE Replicate BAIT TYPE/NUMBER 17 19 22 24 25 54 wood 1) 7.73 14.28 10.34 15.35 13.87 9.94 5.67 2) 13.52 24.60 15.03 6.27 10.43 9.15 5.04 3) 21.94 22.22 16.28 11.04 21.94 8.85 4.75 4) 1.89 4.71 13.40 7.00 15.22 13.34 1.14 mean ±se 11.27 16.45 13.76 9.92 15.37 9.82 4.15 ±8.5 ±8.9 ±2.6 ±4.2 ±4.8 ±2.7 ±2.0 Replicate BAIT TYPE/NUMBER 20 22 23 24 25 54 wood 1) 3.21 1.76 0.00 15.39 0.00 0.96 14.41 2) 11.74 13.34 4.72 15.70 13.47 10.78 2.49 3) 5.96 21.82 5.11 18.57 17.96 12.85 5.03 4) 6.79 10.30 2.70 13.89 17.47 11.49 0.06 mean ±se 6.93 11.81 3.13 16.88 12.22 9.02 5.50 ±3.6 ±8.3 ±2.3 ±2.5 ±8.4 ±5.4 ±6.3
Replicate BAIT TYPE/NUMBER 18 20 23 53 54 wood 1) 8.27 7.95 0.98 8.80 7.55 4.53 2) 13.27 8.35 0.00 5.21 6.66 2.02 3) 13.36 8.08 0.00 19.40 9.49 3.30 4) 11.76 6.95 0.00 19.04 11.37 4.74 mean ±se 11.66 7.83 0.25 13.11 8.77 3.65 ±2.4 ±0.6 ±0.49 ±7.2 ±2.1 ±1.3

The following table shows the average of the mean feeding rates (mg of bait/g of termite/day) for the above-noted tests. Formulation Average of Means mg/g/day Mean 1 Mean 2 Mean 3 017 11.27 018 11.66 019 16.45 020 7.38 6.93 7.83 022 12.79 13.76 11.81 023 1 69 3.13 0.25 024 13.4 9.92 16.88 025 13.80 15.37 12.22 053 13.11 054 9.20 9.82 9.02 Wood control 4.43 4.15 5.5
As shown, microcrystalline cellulose (formulation 025) is an effective termite bait attractant.

Example 2

The termite bait active ingredients or killing agents diflubenzuron, emamectin benzoate and thiamethoxam were tested for their efficacy. The termite species tested was Reticulitermes virginicus. The methodology employed was the standard "choice box" test used in Example 1 in which termites were released into a central chamber with untreated wood. The central chamber was connected, using Tygon tubing (2 mm 1 D), with peripheral feeding chambers containing a termite bait composition of the invention (microcrystalline cellulose powder having an average particle size of 20 micrometers and a termite killing agent) or untreated pine wood. Each replicate was given the choice of one gram of the treated cellulose powder or three blocks (1 cm) of untreated pine wood. At the end of 25 or 37 days, the number of live termites was counted. At the same time, the amount of pine wood or termite bait composition consumed was measured. The treatments were replicated two times.

The results are set forth in the following table: Treatment Days in Bioassay Percent Survivorship Amount of Cellulose Powder Removed Amount of Wood Removed Thiamethoxam 0.05% 25 0 0.01 g 0 Thiamethoxam 0.05% 25 0 0.01 g 0 Emamectin 0.05% 25 0 0.13 g 0 Emamectin 0.05% 25 0 0.07 g 0 Dimilin 0.5% 37 0.1% 0.33 g 0.39 g Dimilin 0.5% 37 0 0.06 g 0.18 g Control 37 89% 0.84 g 1.26 g Control 37 99% 0.82 g 1.38 g
As can be seen, the bait compositions containing thiamethoxam and emamectin benzoate killed termites by contact whereas dimilin killed termites by ingestion. The results show that dimilin gave almost complete control after 37 days exposure and thiamethoxam and emamectin benzoate both killed 100% of the termites after 25 days. Relatively little cellulose powder was consumed but more treated powder was removed than was untreated wood.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.


Anspruch[de]
Termitenköderzusammensetzung, die ein pulverisiertes mikrokristallines Zellulose-Lockmittel mit einer Teilchengröße in dem Bereich von 1 bis 100 Mikrometer und ein Termiten-Abtötungsmittel aufweist. Termitenköderzusammensetzung nach Anspruch 1, bei der das Termiten-Abtötungsmittel aus der Gruppe ausgewählt ist, die aus Chitinsynthese-Hemmern, Juvenilhormon-Nachahmerstoffen, Magengiften, Kontaktinsektiziden und deren Gemischen besteht. Termitenköderzusammensetzung nach Anspruch 1, bei der das pulverisierte mikrokristalline Zellulose-Lockmittel eine Teilchengröße in dem Bereich von 20 bis 50 Mikrometer hat. Termitenköderzusammensetzung nach Anspruch 1, bei der der Chitinsynthese-Hemmer aus der Gruppe ausgewählt ist, die aus Hexaflumuron, Flufenoxuron, Lufenuron und Dimilin besteht. Termitenköderzusammensetzung nach Anspruch 1, bei der der Juvenilhormon-Nachahmerstoff aus der Gruppe ausgewählt ist, die aus Methopren und Pyriproxyfen besteht. Termitenköderzusammensetzung nach Anspruch 1, bei der das Magengift aus der Gruppe ausgewählt ist, die aus Sulfuramid, Abamectin, Cryolit, Borsäure und Alkali- und Erdalkalisalzen der Borsäure besteht. Termitenköderzusammensetzung nach Anspruch 1, bei der das Kontaktinsektizid aus der Gruppe ausgewählt ist, die aus Thiamethoxam, Imidacloprid und Fipronil besteht. Verfahren zur Termiteneindämmung, bei dem man auf ein von Termiten befallenes Gebiet eine Termitenköderzusammensetzung nach einem der Ansprüche 1 bis 7 aufbringt. Verfahren zur Termiteneindämmung nach Anspruch 8, bei dem das Kontaktinsektizid aus der aus Thiamethoxam, Imidacloprid und Fipronil bestehenden Gruppe ausgewählt wird. Packung einer Termitenköderzusammensetzung zur Verwendung in einer Termitenköderstation mit einer Termitenköderzusammensetzung, die ein pulverisiertes mikrokristallines Zellulose-Lockmittel mit einer Teilchengröße in dem Bereich von 1 bis 100 Mikrometer und ein Termiten-Abtötungsmittel enthält und in einer Termiten anlockenden Verpackung enthalten ist. Packung einer Termitenköderzusammensetzung nach Anspruch 10, bei der die Termiten anlockende Verpackung aus einem zellulosischen Material besteht. Packung einer Termitenköderzusammensetzung nach Anspruch 11, bei der das zellulosische Material Papier ist. Packung einer Termitenköderzusammensetzung nach Anspruch 10, bei der das pulverisierte mikrokristalline Zellulose-Lockmittel eine Teilchengröße in dem Bereich von 20 bis 50 Mikrometer hat.
Anspruch[en]
A termite bait composition comprising a powdered microcrystalline cellulose attractant having a particle size in the range of 1 to 100 micrometers and a termite killing agent. A termite bait composition as set forth in claim 1 wherein said termite killing agent is selected from the group consisting of chitin synthesis inhibitors, juvenile hormone mimics, stomach toxicants, contact insecticides and mixtures thereof. A termite bait composition as set forth in claim 1 wherein said powdered microcrystalline cellulose attractant has a particle size in the range of 20 to 50 micrometers. A termite bait composition as set forth in claim 1 wherein said chitin synthesis inhibitor is selected from the group consisting of hexaflumuron, flufenoxuron, lufenuron and dimilin. A termite bait composition as set forth in claim 1 wherein said juvenile hormone mimic is selected from the group consisting of methoprene and pyriproxyfen. A termite bait composition as set forth in claim 1 wherein said stomach toxicant is selected from the group consisting of sulfuramide, abamectin, cryolite, boric acid and alkali and alkaline earth salts of boric acid. A termite bait composition as set forth in claim 1 wherein said contact insecticide is selected from the group consisting of thiamethoxam, imidacloprid and fipronil. A method for controlling termites which comprises applying to a termite infested area a termite bait composition according to any one of Claims 1 to 7. A method for controlling termites as set forth in Claim 8 wherein said contact insecticide is selected from the group consisting of thiamethoxam, imidacloprid and fipronil. A termite bait composition package for use in a termite bait station comprising a termite bait composition containing a powdered microcrystalline cellulose attractant having a particle size in the range of I to 100 micrometers and a termite killing agent, said composition being contained within a termite attractive package. A termite bait composition package as set forth in Claim 10 wherein said termite attractive package is composed of a cellulosic material. A termite bait composition package as set forth in Claim 11 wherein said cellulosic material is paper. A termite bait composition package as set forth in Claim 10 wherein said powdered microcrystalline cellulose attractant has a particle size in the range of 20 to 50 micrometers.
Anspruch[fr]
Composition d'appât pour termites comprenant un appât de cellulose microcristalline en poudre possédant une taille de particules de 1 à 100 micromètres et un agent termicide. Composition d'appât pour termites selon la revendication 1 dans laquelle ledit agent termicide est choisi dans le groupe comprenant les inhibiteurs de synthèse de la chitine, les mimétiques d'hormone juvénile, les substances toxiques pour l'estomac, les insecticides de contact et les mélanges de ceux-ci. Composition d'appât pour termites selon la revendication 1 dans laquelle ledit appât de cellulose microcristalline en poudre possède une taille de particules de 20 à 50 micromètres. Composition d'appât pour termites selon la revendication 1 dans laquelle ledit inhibiteur de synthèse de la chitine est choisi dans le groupe comprenant l'hexaflumuron, le flufénoxuron, le lufénuron et le dimilin. Composition d'appât pour termites selon la revendication 1 dans laquelle ledit mimétique d'hormone juvénile est choisi dans le groupe comprenant le méthoprène et le pyriproxyfène. Composition d'appât pour termites selon la revendication 1 dans laquelle ladite substance toxique pour l'estomac est choisie dans le groupe comprenant le sulfuramide, l'abamectine, la cryolite, l'acide borique et les sels alcalins et alcalino-terreux de l'acide borique. Composition d'appât pour termites selon la revendication dans laquelle ledit insecticide de contact est choisi dans le groupe comprenant le thiaméthoxam, l'imidaclopride et le fipronil. Procédé de lutte contre les termites comprenant l'application sur une surface infestée par les termites d'une composition d'appât pour termites conforme à l'une quelconque des revendications 1 à 7. Procédé de lutte contre les termites selon la revendication 8 dans lequel ledit insecticide de contact est choisi dans le groupe comprenant le thiaméthoxam, l'imidaclopride et le fipronil. Conditionnement de composition d'appât pour termites pour utilisation dans un poste d'appâts pour termites comprenant une composition d'appât pour termites contenant un appât de cellulose microcristalline en poudre possédant une taille de particules de 1 à 100 micromètres et un agent termicide, ladite composition étant contenue dans un conditionnement d'appât attirant les termites. Conditionnement de composition d'appât pour termites selon la revendication 10 dans lequel ledit conditionnement d'appât attirant les termites est compose d'un matériau cellulosique. Conditionnement de composition d'appât pour termites selon la revendication 11 dans lequel ledit matériau cellulosique est du papier, Conditionnement de composition d'appât pour termites selon la revendication 10 dans lequel ledit appât de cellulose microcristalline en poudre possède une taille de particules de 20 à 50 micromètres.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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