[0001] This invention relates to above ground controls for arthropods such as termites, carpenter ants, fire ants and roaches, and in particular to apparatus and methods for using a non-toxic food source to attract the arthropods into housings having a non-edible foraging matrix treated with slow acting and non-repellant toxicants, that causes the arthropods to take the toxicants back to galleries and living areas in their colonies, and this invention is a Continuation-In-Part of U.S. application Ser. No. 09/942,341 filed Aug. 29, 2001, which claims the benefit of priority to U.S. Provisional Application No. 60/243,905 filed Oct. 27, 2000, by the same inventors and assignee as the subject invention, and which also is a Continuation-In-Part of U.S. application Ser. No. 09/525,086 filed Mar. 14, 2000 by the same inventors and a co-assignee of the subject invention which is now U.S. Pat. No. 6,298,597, and which claims the benefit of priority to U.S. Provisional Application No. 60/159,266 filed Oct. 13, 1999.
[0002] Common nuisance pests that are of a primary concern for causing damage generally include arthropods such as termites, carpenter ants, fire ants and roaches. In southern areas especially Florida, termites are considered to be one of the most destructive arthropod pests for any manmade structures containing wood such as the framing in homes, as well as for causing destruction to natural wood containing items such as trees, and the like. termites and dry wood termites. Subterranean termites typically nest in the ground and usually maintain some sort of ground connection at all times. Dry wood termites usually start off in damaging pieces of wood materials, and do not require a ground connection. Between the two forms, the subterranean termites are the most damaging type of termites and usually enter structures such as buildings from surround soil adjacent to the structures.
[0003] Over the years there have been at least several methods of subterranean termite control. For example, the most common method of subterranean termite control requires soil underlying a structure to be treated with a termiticide barrier to prevent the termites from entering the structure from the ground. For example, a typical structure such as a house would have used hundreds of gallons of termiticide that would have been used to treat the soil underneath the house foundation.
[0004] From approximately 1950 to approximately 1988, a popular method for barrier treatment control for subterranean termites was chlorinated hydrocarbons. However, environmental concerns with those chemical treatments resulted in problems with the soil that could last up to approximately 35 years. Replacement chemicals for the chlorinated hydrocarbons were not popular since the replacement chemicals had a high rate of failure which resulted in extensive termite damage to the structures.
[0005] Problems with the barrier treatments became further compounded since builders have often been known to dump substantial amounts of termite edible building materials, such as wood and cardboard scraps, into the underlying soil that have served as guide lines for allowing the termites to then enter from the soil up and into the structures. These edible debris are a substantial food source, that increases the likelihood of termite infestation into the structure.
[0006] Over the years, different techniques have been developed and proposed to enhance the underground delivery of toxic insecticides beneath structures. See for example, U.S. Pat. Nos. 3,940,875 and 4,043,073 to Basile; and U.S. Pat. No. 4,625,474 to Peacock. However, many of these techniques and systems such as Basile '073 are concerned with trying to refresh the initial termiticide barrier by having the termites chew through a container with the toxicant (for example). Other examples of these techniques and systems allow for installing a piping system during the building construction process so that additional termiticide can be pumped under a slab of the building at intervals during construction. Furthermore, some of these techniques and systems such as the Basile '073 patent utilized a toxicant (for example, dieldrin) which has been banned by the EPA (Environmental Protection Agency) for termite treatment. Additionally, the pipes used in the pumping delivery systems have been known to often get clogged after installation making the pipe delivery systems not reliable nor usable overtime.
[0007] Other well-known subterranean termite treatment techniques and systems include bait techniques, which require termites to forage into a monitor that contains a non-toxic food source. Once termites infest the non-toxic food source, a food source laced with a toxicant (toxic bait) is replaced into the monitor. Termites continue to be recruited into the monitor and feed on the toxic bait. Consumption and trophallaxis (feeding other termites) of the toxic bait later causes many termites to die. See for example, U.S. Pat. No. 5,329,726 to Thome et al.; U.S. Pat. No. 5,899,018 to Gordon et al.; and U.S. Pat. No. 5,950,356 to Nimocks. However, these techniques generally require that the termites consume the toxic bait. Termites refuse to consume most toxicants. Therefore this technique is generally useful for only some 2 to 3 toxicants currently known in the world. Termites also refuse to consume bait food sources that are contaminated with molds or food sources that are too wet. These bait techniques do not use a non-edible foraging matrix (as described in the subject invention), such as but not limited to soil and sand, to cause the termites to tunnel therethrough and carry the non-edible particles treated with the toxicants to the galleries and living spaces of the colony, and thus contaminating the colonies. Most toxicants applied to non-edible foraging matrixes, except repellant pyrethroids, will be picked up and carried by the termites to other areas of their tunnel systems.
[0008] Other systems have been proposed but still fail to overcome the problems with the methods and applications described above. U.S. Pat. No. 3,972,993 to Kobayashi et al. requires a membrane be treated with a substance attractive to termites (due to the termite's innate searching and feeding behavior, termites are not attracted to food from a distance when allowed to forage without interference) so that when the termites chew through the membrane a toxic surface is contacted. U.S. Pat. No. 5,501,033 to Wefler delivers a liquid toxic food source for social insects such as yellowjackets and has very little use for termites. U.S. Pat. No. 5,609,879 to Myles requires the laborious harvesting of termites from the ground, sponging on an insecticidal epoxy, and returning it to the soil. U.S. Pat. No. 5,778,596 to Henderson et al. is a device for delivering toxic food for termites to consume. And U.S. Pat. No. 5,921,018 to Hirose provides foraging guidelines for termites to follow so the termites enter a device that captures and kills them.
[0009] There are additional problems with prior art treatments that use repellent liquids, non-repellent liquids, and baits. When using repellent liquids, the liquid barriers need to be applied in a perfectly continuous fashion. If gaps in the treatment exist, especially with repellent termiticides, such as those belonging to the pyrethroid class, the termites will forage and find the gaps in the treatment, increasing the probability of infesting the structure.
[0010] In non-repellent liquid treatments, the termites are not able to detect that they are in a treated area; hence the classification “non-repellent”, and the termites die. A major drawback for non-repellent liquid treatments is that liquid termiticides in this class are still so new that there are questions about how long they will last in the soil, especially when exposed to sun and weather. The subject invention protects the foraging matrix from the sun and weather conditions in order to prolong its' usability, and the foraging matrix can be continuously replaced as necessary to recharge the system. The application of liquid termiticide barriers requires several hundred gallons of insecticide that is pumped under structures, such as houses, and can sometimes result in the contamination of the house interior, as well as water supply wells. Most homeowners have been known to want termicide applications that are less intrusive and disruptive.
[0011] Bait type station techniques and systems are again not practical since the bait stations require a food source that is palatable to termites. Selecting the appropriate food source can be difficult. While wood is a known food source, wood is very inconsistent in composition, so manufacturers don't like to use it with toxicants.
[0012] Other known food sources such as paper food sources have other problems. For example, if paper is not packed tightly enough, it will be emptied by termites and not be able to deliver enough toxicants to kill large numbers of termites. Most cellulose material will rot when placed in the soil. Once the cellulose material food source goes bad, termites will not feed, rendering the bait ineffective.
[0013] The subject invention uses a non-edible foraging matrix treated with a slow-acting non-repellent toxicant for above ground arthropod control methods and systems. Termites can put the particles of the treated matrix into their mouths when they tunnel through it, and many toxicants will work because they do not need to consume it and feed it to others. The particles are returned to the colony and incorporated into their tunnels. Termites that contact the particles die several days after the toxicant on the matrix particles are contacted. The behavior of the termites moves the treated foraging matrix from the exit and entrance opening of the device's chamber to contaminate their colony and tunnels.
[0014] A primary objective of the invention is to provide an above ground method and system for killing arthropods such as termites, carpenter ants, fire ants and roaches over time that safely disperses toxicants without allowing humans and pets to come into contact with the toxicants.
[0015] A secondary objective of the invention is to provide an above ground method and system for protecting manmade structures such as homes, buildings, fences and sheds from destructive arthropods such as termites, carpenter ants, fire ants and roaches.
[0016] A third objective of the invention is to provide an above ground method and system for protecting natural items such as trees, shrubbery, plants and gardens from destructive arthropods such as termites, carpenter ants, fire ants, and roaches.
[0017] The fourth objective of the invention is to provide an above ground method and system for using a non-toxic and edible food source to attract arthropods such as termites, carpenter ants, fire ants, and roaches, and causing the arthropods to then tunnel through non-edible particles that are treated with a slow-acting and non-repellent toxicant so that arthropods returning to their colonies will contaminate their galleries and living spaces with the toxicant.
[0018] A fifth objective of the invention is to provide an above ground method and system for using non-edible particles such as soil particles, sand particles, sand particles, and the like, and mixtures thereof for dispersing toxicants to arthropods such as termites, carpenter ants, fire ants and roaches that pass through tunnels, galleries and living spaces.
[0019] A sixth objective of the invention is to provide above ground systems and methods for treating arthropods such as termites, carpenter ants, fire ants, and roaches, that is easy and quick to apply to above ground structures and items.
[0020] A seventh objective of the invention is to provide above ground methods and systems for easily accessing arthropod controls without having to remove the controls from a premounted location.
[0021] Above ground surface methods and systems are included for killing arthropods such as termites, carpenter ants, fire ants, and roaches, to protect manmade structures such as homes, buildings, sheds and natural items such as but not limited to trees, shrubbery, plants and gardens.
[0022] The above ground methods and systems can include positioning the embodiment against a structure or item that is to be protected. Inside the chamber is an open bottom end with an edible non-toxic food source such as foam which can be jammed into the open bottom end of the chamber. Above the food source can be a foraging matrix having a non-edible foraging material mixed with a slow-acting non-repellent toxicant. The side of the non-toxic food source that is positioned against the structure or item can include a fastener surface such as but not limited to peel and stick tape, hook and loop fasteners, and the like, which allows the embodiments to be attached to various manmade and natural structures and items. Additionally, the embodiments can be attached by novel fastening arrangements using fasteners such as screws, nails, and stakes, and the like.
[0023] Additional embodiments can include removable caps that can be either screwed on, snapped, on, or hingedly attached to the top of the chamber to allow the contents of the chamber to be replenished without having to remove the entire embodiment from a preattached location.
[0024] Further objects and advantages of this invention will be apparent from the following detailed description of a presently preferred embodiment which is illustrated schematically in the accompanying drawings.
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[0041] Before explaining the disclosed embodiments of the present invention in detail it is to be understood that the invention is not limited in its application to the details of the particular arrangements shown since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation.
[0042] Below ground embodiments for arthropod control are described in detail in the parent application Ser. No. 09/525,086 filed Mar. 14, 2000 by the same inventors and a co-assignee as that of the subject invention, issued as U.S. Pat. No. 6,298,597, which subject matter is incorporated by reference.
[0043] Further below ground embodiments for arthropod control are also described in detail in parent application Ser. No. 09/942,341 filed Aug. 29, 2001 to the same inventors and assignee as that of the subject invention, the subject matter of which is also incorporated by reference.
[0044] First Embodiment
[0045]
[0046] A disc shape of a foraging matrix
[0047] The chamber
[0048] Referring to FIGS.
[0049] The experimental conditions for the layout of FIGS.
[0050] Table 1 shows different dated trials having five test samples each using Chlorfenapyr as the slow-acting non-repellant toxicant interspersed with the non-edible foraging matrix, compared to a untreated control samples that do not have any slow-acting non-repellant toxicants.
TABLE 1 Above Ground With Paper Chlorfenapyr 1 12.5 ppm Start: 8/3/2002 End: 9/6/2002 1000 worker termites Soil and Paper Live Treatment Rep Removed Ave. Termites Ave. Mortality (%) Ave. Chlorfenapyr 1 5.009 5.078 128 26.8 87.2 97.32 12.5 ppm Chlorfenapyr 2 3.9209 6 99.4 12.5 ppm Chlorfenapyr 3 4.6704 0 100 12.5 ppm Chlorfenapyr 4 5.4268 0 100 12.5 ppm Chlorfenapyr 5 6.3641 0 100 12.5 ppm Control 1 7.3613 7.81 719 727 28.1 27.3 Control 2 0 705 29.5 Control 3 9.2634 737 26.3 Control 4 12.0027 749 25.1 Control 5 10.425 725 27.5 Chlorfenapyr 2 12.5 ppm Start: 9/13/2002 End: 10/17/2002 1000 worker termites Soil and Paper Live Treatment Rep Removed Ave. Termites Ave. Mortality (%) Chlorfenapyr 1 1.8367 1.425 170 270.8 83.17 73.19 12.5 ppm Chlorfenapyr 2 0 581 42.48 12.5 ppm Chlorfenapyr 3 0 603 40.3 12.5 ppm Chlorfenapyr 4 2.9156 0 100 12.5 ppm Chlorfenapyr 5 2.3727 0 100 12.5 ppm Control 1 7.8217 8.342 605 543.6 40.1 46.18 Control 2 8.0771 315 68.81 Control 3 11.0171 544 46.14 Control 4 5.5126 633 37.33 Control 5 9.2819 621 38.51
[0051] In the first trial, there was an average of approximately 97.3% mortality in termites that were exposed to approximately 12.5 ppm chlorfenapyr with the above ground application device. Mortality in the controls was significantly less at approximately 27%. In the second trial, there was an average mortality of 73.2%. However, termites did not enter two of the above ground applications and were therefore not exposed to chlorfenapyr. If the data from the uninvaded above ground application devices are eliminated, and average mortality is taken on only those replications where termites invaded the application device, then mortality is 94.4%. Control mortality for all units was approximately 46.2%, which is high, but still less than mortality in treatment units. The average mortality for both trials where treatment units have been invaded is approximately 96.2%. The average control is approximately 37.5%. The test data demonstrates that the above ground application device can kill termites under the described conditions.
[0052] Additionally, for those units where termites invaded it, the average amount of soil moved in application devices that were treated was approximately 4.06 g, while the average amount moved in control units was approximately 8.97 g.
[0053] For the above ground arthropod control invention embodiments, the slow-acting non-repellant toxicant can include but not be limited to chlorfenapyr, Fipronil, thiomethoxam, imidacloprid, hydramethylnon, sulfuramid, IGRs such as but limited to Hexaflumuron, lurfenuron, diflubenuron, and the like. The slow-acting non-repellant toxicants can be intermixed with any non-edible foraging matrix such as but not limited to builder's sand, Alachua Fine Soil, and the like, as described in the parent applications to the subject inventions which are incorporated by reference.
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[0055] Covering the outer exposed side of the disc
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[0057] Referring to
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[0059] Referring to
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[0061] Referring to
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[0063] Referring to
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[0065] Referring to
[0066] Second Embodiment
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[0068] Covering upper open end
[0069] The removable lid type cap
[0070] Covering the outer exposed side of the disc
[0071] Third Embodiment
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[0073] The removable lid type cap
[0074] The removable lid
[0075] Covering the outer exposed side of the disc
[0076] Fourth Embodiment
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[0078] The removable lid type cap
[0079] The removable lid
[0080] Covering the outer exposed side of the disc
[0081] Fifth Embodiment
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[0083] Removing some or all of the shrink wrap
[0084] The chamber
[0085] Covering the outer exposed side of the disc
[0086] Sixth Embodiment
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[0088] Seventh Embodiment
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[0090]
[0091] Although the preceding embodiments refer to the term foam, this layer can also include but not be limited to various types of foams such as but not limited to open cell foam, closed cell foam, Styrofoam, and the like, and combinations, thereof.
[0092] Although some types of non-edible foraging matrix materials were described, other types of non-edible foraging matrix materials can be used, such as but not limited to soil, sand, gravel, rocks, pebbles, shale, expanded shale, clay, and the like, and combinations thereof. Additionally, other non-edible foraging matrix materials can be used such as those that can be ground or fashioned to the particle size that arthropods such as but not limited to termites and other arthropods can pick up and can forage through. Additionally, any other types of non-edible foraging materials that arthropods such as but not limited to termites, can be used such as but not limited to dental cast-stone and other porous materials, and the like, and combinations thereof with any other materials described here.
[0093] While various shapes for the embodiments are shown, the invention can include all types of geometrical shapes such as but not limited to rectangular, polygon, disc, global, cylindrical, triangular, and the like, and various combinations thereof, and the like.
[0094] Although each of the embodiments is separately described above, each and every feature of the embodiments can be interchanged and used with any of the other embodiments. Likewise, each of the embodiments can be used in different combinations with each other.
[0095] In addition to the slow-acting non-repellent toxicants previously described, other slow-acting toxicants can also be used such as those listed but not limited to those in Table 2.
TABLE 2 Additional Slow-Acting Toxicants TYPE SLOW-ACTING TOXICANTS Non-repellants: Chlorfenapyr, Imidacloprid, Friponil Bait Materials: Hydramethylnon, Sulfluramid, Hexaflumuron IGRs: Pyriproxyfen, methoprene and lufenuron, dimilin Others: Chlorpyrifos, and their active derivatives Botanicals: Neem(azadiractin) Inorganics: Boric acid based.
[0096] Although the layer in the chamber adjacent to the arthropod entry is described as primarily being an edible non-toxic food source, the layer can also be an arthropod attractant material that arthropods do not necessarily eat, but are attracted to such as pseudo-scents, and the like.
[0097] While the preferred embodiments have been described as being used adjacent to structures such as manmade structures such as wood-containing houses, wood-containing buildings, wood-containing sheds and wood-containing fences, and the like, and combinations thereof, the invention embodiments can be placed adjacent to other non manmade items that can be damaged by arthropods, such as but not limited to trees, plants, shrubbery, gardens, and the like, and combinations thereof Likewise the invention embodiments can be placed adjacent to both manmade and natural items that can be damaged by the arthropods.
[0098] Although some of the preferred embodiments have been described as being specifically used with subterranean type termites, the invention embodiments are applicable to other types of crawling arthropods, such as but not limited to termites, carpenter ants, fire ants, roaches, and the like, and combinations, thereof, and the like.
[0099] Although the invention embodiments are described as being used primarily with crawling type arthropods, the invention can be used with other types of arthropods such as above ground termites, and the like., and in combinations thereof with other non-crawling arthropods. Additionally, the invention embodiments can be used in combination treatments for both crawling and non-crawling arthropods, and the like.
[0100] Additionally, the embodiments can be attached directly to materials themselves, such as but not limited to being attached to landscape timbers including recycled railroad ties, which has been known to transport pest species such as Formosan subterranean termites around the country. For example, the teeth and/or stakes and/or nail/screw fasteners of the embodiments can be used for such an attachment.
[0101] The invention embodiments can be placed adjacent to either or both manmade and natural items and structures that can be damaged by the arthropods.
[0102] While the invention has been described, disclosed, illustrated and shown in various terms of certain embodiments or modifications which it has presumed in practice, the scope of the invention is not intended to be, nor should it be deemed to be, limited thereby and such other modifications or embodiments as may be suggested by the teachings herein are particularly reserved especially as they fall within the breadth and scope of the claims here appended.