WO1992000173A1 - Insect control - Google Patents
Insect control Download PDFInfo
- Publication number
- WO1992000173A1 WO1992000173A1 PCT/NL1991/000110 NL9100110W WO9200173A1 WO 1992000173 A1 WO1992000173 A1 WO 1992000173A1 NL 9100110 W NL9100110 W NL 9100110W WO 9200173 A1 WO9200173 A1 WO 9200173A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wood
- space
- present
- temperature
- reached
- Prior art date
Links
- 241000238631 Hexapoda Species 0.000 title claims abstract description 22
- 239000002023 wood Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000000855 fungicidal effect Effects 0.000 claims description 3
- 239000000417 fungicide Substances 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002917 insecticide Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 2
- 239000000126 substance Substances 0.000 description 6
- 239000000575 pesticide Substances 0.000 description 5
- 241000233866 Fungi Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 235000013601 eggs Nutrition 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241000261585 Hadrobregmus pertinax Species 0.000 description 1
- 241000429635 Xestobium rufovillosum Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/72—Pest control
Definitions
- insects can be found in wood which can cause damage therein. This relates for example to the death- watch beetle, woodworm and the like.
- insects cannot always be successfully controlled by chemical means. Insects, larvae and eggs can already be present in the wood from the tree stage which, because of a sometimes insufficient drying of the wood, can still be alive when the wood has already been incorporated into constructions. Damage by insects can be a great problem particularly in older and valuable buildings with wooden structural parts.
- the invention has for its object to offer a method for controlling insects, using which the insects can be killed in a very simple and reliable manner and the danger of possible recurrence is virtually eliminated.
- a further object of the invention is to provide a method for performing a preservative treatment of wood present in building structures wherein it is not necessary to temporarily remove the wood from the structure for the purpose of the treatment.
- the invention has as its further object to offer a method which can in principle be performed without any chemical additives, whereby no environmental impact can occur.
- the invention generally provides a method for controlling insects present in wood, comprising the following steps of: (1) heating the wood until it has reached a minimum temperature of 45°C throughout; and (2) simultaneously preventing water present in the wood from leaving the wood.
- Preventing water leaving the wood during heating can be of essential importance for two reasons.
- a fall in the heat conduction due to a decreased relative humidity must be prevented.
- a highly effective heat penetration can thereby be realized with relatively low energy consumption.
- the heat up time hereby remains limited.
- stretch and shrinkage do not occur in the wood due to drying out, which could cause damage to and weakening of the structure owing to local strains.
- the choice of a minimum attainable temperature of 45*C is based on the insight that not only the insects and larvae but also eggs present in the wood are certainly killed at this temperature.
- the method according to the invention can advan ⁇ tageously be characterized by
- step (2) by placing the wood during performing of step (1) in an environment with a relative humidity of minimally 30%.
- the method can be characterized by (4) performing step (3) by holding the relative humidity substantially constant at a pre-selected value.
- a heating device with a hydrostatic regulator added thereto which maintains the amount of moisture in the relevant environment at the selected value.
- the method is characterized by (5) performing step (1) by placing the wood in an environment with a temperature above the minimum temperature to be reached of 45 ⁇ C. Since Sprinkler installations are often present in buildings, care should be taken that the ambient temperature does not rise so high that the Sprinkler installation is set into operation. The ambient temperature created should therefore be limited to a temperature which lies for example several degrees below the activating temperature of the Sprinkler installation.
- the method can for example be characterized by
- step (5) performing step (5) with an ambient temperature in the order of magnitude of 15"C above the temperature to be reached.
- step (1) adding chemical agents, in particular an insecticide such as S0 2 , ZnCl 2 and/or fungicide to the outside of the wood during step (1) , after a temperature in the order of magnitude of 35 ⁇ C has been reached.
- This step is based on the insight that when the temperature rises to about 35 ⁇ C the insects will begin to display increased activity, whereby a number of insects may reach the outside of the wood. According to this step they there come into contact with the chemical pesticides.
- a fungicide can control fungi, which may be necessary since the growth of these fungi is encouraged by the raised absolute humidity during the process according to the invention.
- a method for treating wood present in an enclosed space can be advantageously characterized by 4
- a chemical pesticide can advantageously be applied there.
- a chemical pesticide can be added to the air when it is blown in.
- the cracks serve for ventilation of the enclosed space whereby the build up of pressure therein remains limited.
- the pesticides can be deposited there and, insofar as necessary, form a blockade against harmful insects later coming from outside. It is noted that larger cracks are preferably sealed prior to the control according to the invention.
- the method can preferably be characterized by
- the effective space is hereby reduced which is conducive to a small heat supply and rapid heating of the wooden construction parts. Often adjoining such a space is at least one space which does not have to be treated, or where the rise in temperature to be obtained by the invention must not be reached, for example in the case where valuable, vulnerable objects are present in this space.
- the invention provides therefor a method for treating wood present in a first space which is in communication with a second space, which method is characterized by
- the method can be performed according to the invention without a separate conditioned space, for example a kiln, being required therefor.
- the invention thereby provides a particularly simple and reliable method for performing a preservative treatment of wood incorporated in building structures, wherein insects present in that wood are controlled according to one or more of the above described methods.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Catching Or Destruction (AREA)
Abstract
A method for controlling insects present in wood comprises the steps of heating the wood until it has reached a minimum temperature of 45 °C throughout; and simultaneously preventing water present in the wood from leaving the wood by placing the wood in an environment with a relative humidity of minimally 30 %. For treating wood present in an enclosed space the method comprises the steps of blowing heated, humidified air into this space and reducing the effective amount of air in the space by inflating therein at least one balloon.
Description
INSECT CONTROL
It is known that insects can be found in wood which can cause damage therein. This relates for example to the death- watch beetle, woodworm and the like.
Such insects cannot always be successfully controlled by chemical means. Insects, larvae and eggs can already be present in the wood from the tree stage which, because of a sometimes insufficient drying of the wood, can still be alive when the wood has already been incorporated into constructions. Damage by insects can be a great problem particularly in older and valuable buildings with wooden structural parts. The invention has for its object to offer a method for controlling insects, using which the insects can be killed in a very simple and reliable manner and the danger of possible recurrence is virtually eliminated.
A further object of the invention is to provide a method for performing a preservative treatment of wood present in building structures wherein it is not necessary to temporarily remove the wood from the structure for the purpose of the treatment.
The invention has as its further object to offer a method which can in principle be performed without any chemical additives, whereby no environmental impact can occur. In order to achieve the above stated objectives the invention generally provides a method for controlling insects present in wood, comprising the following steps of: (1) heating the wood until it has reached a minimum temperature of 45°C throughout; and (2) simultaneously preventing water present in the wood from leaving the wood.
Preventing water leaving the wood during heating can be of essential importance for two reasons. In order to ensure the effectiveness of the penetration of the heat into the core of the wood in a short time, a fall in the heat
conduction due to a decreased relative humidity must be prevented. A highly effective heat penetration can thereby be realized with relatively low energy consumption. The heat up time hereby remains limited. Particularly with older structures it is further essential to take care that stretch and shrinkage do not occur in the wood due to drying out, which could cause damage to and weakening of the structure owing to local strains.
The choice of a minimum attainable temperature of 45*C is based on the insight that not only the insects and larvae but also eggs present in the wood are certainly killed at this temperature.
Achieved as a result of the effective temperature increase to the stated temperature is that the insects present deep in the wood are also killed. A chemical treat¬ ment does not lend itself to such a process. Attempts have been made in this context to inject poison, for example CO- gas, into the wood by means of bore holes. This kills the insects effectively but leaves the eggs unaffected. As already noted above, the insects can be present in the wood which has been insufficiently dried during production. The method according to the invention therefore lends itself not only to application in existing structures but can also be successfully used in the wood drying and wood finishing industries.
The method according to the invention can advan¬ tageously be characterized by
(3) performing step (2) by placing the wood during performing of step (1) in an environment with a relative humidity of minimally 30%.
The presence of a heat conducting jacket around the wood for treating is hereby always ensured.
In a particular embodiment the method can be characterized by (4) performing step (3) by holding the relative humidity substantially constant at a pre-selected value. Use can be made for this purpose of a heating device with a hydrostatic regulator added thereto which maintains the
amount of moisture in the relevant environment at the selected value.
In a preferred embodiment the method is characterized by (5) performing step (1) by placing the wood in an environment with a temperature above the minimum temperature to be reached of 45βC. Since Sprinkler installations are often present in buildings, care should be taken that the ambient temperature does not rise so high that the Sprinkler installation is set into operation. The ambient temperature created should therefore be limited to a temperature which lies for example several degrees below the activating temperature of the Sprinkler installation. The method can for example be characterized by
(6) performing step (5) with an ambient temperature in the order of magnitude of 15"C above the temperature to be reached.
In a particularly ingenious embodiment the method according to the invention is characterized by
(7) adding chemical agents, in particular an insecticide such as S02, ZnCl2 and/or fungicide to the outside of the wood during step (1) , after a temperature in the order of magnitude of 35βC has been reached. This step is based on the insight that when the temperature rises to about 35βC the insects will begin to display increased activity, whereby a number of insects may reach the outside of the wood. According to this step they there come into contact with the chemical pesticides. In this context a fungicide can control fungi, which may be necessary since the growth of these fungi is encouraged by the raised absolute humidity during the process according to the invention.
In a further variant the method is characterized by
(8) forced cooling of the wood after step (1) ; and (9) repeating the method a selected number of times.
The very vigorous pollen of fungi can hereby be effectively controlled.
A method for treating wood present in an enclosed space can be advantageously characterized by
4
(10) blowing heated, humidified air into this space. After completion of the treatment according to the invention the normal humidity in the building can be restored by ventilation and optional heating without extra addition of moisture.
Since cracks in such a construction can be a point of entry for insects, a chemical pesticide can advantageously be applied there. As described above, a chemical pesticide can be added to the air when it is blown in. The cracks serve for ventilation of the enclosed space whereby the build up of pressure therein remains limited. Thus achieved in a natural manner is that the added pesticides pass through the cracks. The pesticides can be deposited there and, insofar as necessary, form a blockade against harmful insects later coming from outside. It is noted that larger cracks are preferably sealed prior to the control according to the invention.
In the case of controlling insects in the wood in large hollow spaces, for example churches, the method can preferably be characterized by
(11) reducing the effective amount of air in the space by inflating therein at least one balloon.
The effective space is hereby reduced which is conducive to a small heat supply and rapid heating of the wooden construction parts. Often adjoining such a space is at least one space which does not have to be treated, or where the rise in temperature to be obtained by the invention must not be reached, for example in the case where valuable, vulnerable objects are present in this space. The invention provides therefor a method for treating wood present in a first space which is in communication with a second space, which method is characterized by
(12) at least substantially mutually sealing the two spaces and blowing air into the second space such that therein a higher pressure prevails than in the first space.
The method can be performed according to the invention without a separate conditioned space, for example a kiln, being required therefor.
The invention thereby provides a particularly simple and reliable method for performing a preservative treatment of wood incorporated in building structures, wherein insects present in that wood are controlled according to one or more of the above described methods.
Claims
1. Method for controlling insects present in wood, compri .si.ng the following steps of:
(1) heating the wood until it reaches a minimum temperature of 45'C throughout; and (2) simultaneously preventing water present in the wood from leaving the wood.
2. Method as claimed in claim 1, characterized by
(3) performing step (2) by placing the wood in an environment with a relative humidity of minimally 30% during performing of step (1) .
3. Method as claimed in claim 2, characterized by
(4) performing step (3) by holding the relative humidity substantially constant at a pre-selected value.
4. Method as claimed in claim 1, characterized by (5) performing step (1) by placing the wood in an environment with a temperature above the minimum temperature to be reached of 45*C.
5. Method as claimed in claim 4, characterized by
(6) performing step (5) with an ambient temperature in the order of magnitude of 15*C above the temperature to be reached.
6. Method as claimed in claim 1, characterized by
(7) adding chemical agents, particularly an insecticide such as S02, ZnCl2 and/or fungicide to the outside of the wood during step (1) after a temperature in the order of magnitude of 35"C has been reached.
7. Method as claimed in claim 1, characterized by
(8) forced cooling of the wood after step (1) ; and
(9) repeating the method a selected number of times.
8. Method as claimed in claim 1 for treating wood present in an enclosed space, characterized by
(10) blowing heated, humidified air into this space.
9. Method as claimed in claim 8, characterized by (11) reducing the effective amount of air in the space by inflating therein at least one balloon.
10. Method as claimed in claim 8 for treating wood that is present in a first space adjoining a second space, characterized by
(12) at least substantially mutually sealing the two spaces and blowing air into the second space such that a higher pressure prevails therein than in the first space.
11. Method for performing a preservative treatment of wood present in building structures, characterized by a method for controlling insects present in that wood as claimed in one or more of the claims l-io.
*****
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9001498A NL9001498A (en) | 1990-06-29 | 1990-06-29 | Insect control. |
| NL9001498 | 1990-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992000173A1 true WO1992000173A1 (en) | 1992-01-09 |
Family
ID=19857342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL1991/000110 WO1992000173A1 (en) | 1990-06-29 | 1991-06-27 | Insect control |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL9001498A (en) |
| WO (1) | WO1992000173A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4429850A1 (en) * | 1994-08-23 | 1996-02-29 | Binker Materialschutz Gmbh | Efficient and reliable process for killing pests |
| ES2094102A1 (en) * | 1995-06-20 | 1997-01-01 | Urbieta Pello Jauregui | Process for protecting and eliminating plagues of xylophagans from wooden articles |
| EP0963694A1 (en) | 1998-06-10 | 1999-12-15 | Binker Materialschutz GmbH | Thermal device for pest control |
| ES2162594A1 (en) * | 2000-02-10 | 2001-12-16 | Urbieta Pello Jauregi | Method for xylophagous wood protection comprises cooling wood to between -20oC and -30C, holding temperature for one to two days and then heating slowly to ambient temperature |
| US6604643B1 (en) | 1998-06-24 | 2003-08-12 | Alpha Security Products, Inc. | Bottle security device |
| BE1014624A3 (en) * | 2000-07-14 | 2004-02-03 | Jauregi Urbieta Pello | Method for xylophagous wood protection comprises cooling wood to between -20oC and -30C, holding temperature for one to two days and then heating slowly to ambient temperature |
| RU2224230C2 (en) * | 1998-07-29 | 2004-02-20 | Хойфт Зюстемтехник Гмбх | Fluid tightness and/or sealing investigation method for vessel |
| RU2226679C2 (en) * | 1998-07-29 | 2004-04-10 | Хойфт Зюстемтехник Гмбх | Technique to test plugged vessels |
| US6912878B2 (en) | 2003-02-24 | 2005-07-05 | Alpha Security Products, Inc. | Bottle security device |
| WO2007128845A1 (en) | 2006-05-10 | 2007-11-15 | Pello Jauregi Urbieta | Method for providing protection and for eliminating infestations of xylophages in wooden objects |
| US7866497B2 (en) | 2007-12-12 | 2011-01-11 | Checkpoint Systems, Inc. | Bottle security device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL86099C (en) * | ||||
| EP0143324A2 (en) * | 1983-10-27 | 1985-06-05 | Wolfgang Dr. Wegener | Method for the control and destruction of fungi on organic materials and building materials, especially in case of damp |
| EP0432296A1 (en) * | 1989-12-13 | 1991-06-19 | Hans-Werner Von Rotberg | Process and apparatus for pest destruction, especially in the conservation of objects |
-
1990
- 1990-06-29 NL NL9001498A patent/NL9001498A/en active Search and Examination
-
1991
- 1991-06-27 WO PCT/NL1991/000110 patent/WO1992000173A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL86099C (en) * | ||||
| EP0143324A2 (en) * | 1983-10-27 | 1985-06-05 | Wolfgang Dr. Wegener | Method for the control and destruction of fungi on organic materials and building materials, especially in case of damp |
| EP0432296A1 (en) * | 1989-12-13 | 1991-06-19 | Hans-Werner Von Rotberg | Process and apparatus for pest destruction, especially in the conservation of objects |
Non-Patent Citations (2)
| Title |
|---|
| Central Patent Index, Basic Abstracts Journal, Section D, week 8934, 9th May 1989, Abstract no. 89248833, & US 7270608, (J.W. ARMSTRONG et al.), NTIS Gazette, 5 May 1989, see page 4, line 1 - page 5, line 34; page 17; examples 3,4 * |
| Electrical Times, vol. 138, no. 4, 28 July 1960, A. Morris Thomas:" Wood-worm destruction by h.f. fields", pages 121-123, see page 121, left-hand column, lines 29-37 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4429850A1 (en) * | 1994-08-23 | 1996-02-29 | Binker Materialschutz Gmbh | Efficient and reliable process for killing pests |
| ES2094102A1 (en) * | 1995-06-20 | 1997-01-01 | Urbieta Pello Jauregui | Process for protecting and eliminating plagues of xylophagans from wooden articles |
| EP0963694A1 (en) | 1998-06-10 | 1999-12-15 | Binker Materialschutz GmbH | Thermal device for pest control |
| DE19825880C1 (en) * | 1998-06-10 | 2000-01-27 | Binker Materialschutz Gmbh | Thermal pest control |
| US6279261B1 (en) | 1998-06-10 | 2001-08-28 | Binker Materialschutz Gmbh | Thermal pest control |
| DE19825880C5 (en) * | 1998-06-10 | 2010-01-07 | Binker Materialschutz Gmbh | Thermal pest control |
| US6604643B1 (en) | 1998-06-24 | 2003-08-12 | Alpha Security Products, Inc. | Bottle security device |
| RU2224230C2 (en) * | 1998-07-29 | 2004-02-20 | Хойфт Зюстемтехник Гмбх | Fluid tightness and/or sealing investigation method for vessel |
| RU2226679C2 (en) * | 1998-07-29 | 2004-04-10 | Хойфт Зюстемтехник Гмбх | Technique to test plugged vessels |
| ES2162594A1 (en) * | 2000-02-10 | 2001-12-16 | Urbieta Pello Jauregi | Method for xylophagous wood protection comprises cooling wood to between -20oC and -30C, holding temperature for one to two days and then heating slowly to ambient temperature |
| BE1014624A3 (en) * | 2000-07-14 | 2004-02-03 | Jauregi Urbieta Pello | Method for xylophagous wood protection comprises cooling wood to between -20oC and -30C, holding temperature for one to two days and then heating slowly to ambient temperature |
| US6912878B2 (en) | 2003-02-24 | 2005-07-05 | Alpha Security Products, Inc. | Bottle security device |
| US7007523B2 (en) | 2003-02-24 | 2006-03-07 | Alpha Security Products, Inc. | Bottle security device |
| WO2007128845A1 (en) | 2006-05-10 | 2007-11-15 | Pello Jauregi Urbieta | Method for providing protection and for eliminating infestations of xylophages in wooden objects |
| US7866497B2 (en) | 2007-12-12 | 2011-01-11 | Checkpoint Systems, Inc. | Bottle security device |
Also Published As
| Publication number | Publication date |
|---|---|
| NL9001498A (en) | 1992-01-16 |
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