1. Workshop Integrated Pest Management (IPM) New perspectives and methodes for insect control Brussel 18thof March 2013 Technical basicsofthe ThermoLignum®process Bernhard Schachenhofer

2. The IdeabehindtheThermoLignumProcess • Insects (Pests) such as woodworm (Anobiumpunctatum), moths, carpet beetle etc. are temperature sensitive. • The majority of insects at any of the various stages of their life cycle will die if they are subjected to temperatures between 50°C and 55°C for an extended period. • →Heatuptheobjects Source: Becker und Loebe 1961

3. The risks of heat treatment • Dimensional change, due to swelling or shrinkage, because of changes in the object moisture content • Excessive temperature differences in the object Damage to objects occurs for two reasons:

4. The solution Control relative Humidity during the process Contextofclimatandwoodmoisture

5. The solution • Measure the core temperature • Define a temperature difference • Control the chamber temperature Avoid large temperature differences between surface and core

6. time Treatment phase warming phase Cooling phase rh% < 60°C ≥ 55°C °C - t Mind. 1 Std Core temperatur °C Cell temperatur °C Relative humidity % Bring all together The ThermoLignum®Chamber Technology Process sheme

7. The Thermo Lignum®process processscheme in a ThermoLignum®chamber t = 18 – 24 Std Treat-mentphase Warmingphase Coolingphase t t Cell or Chamber temperature Core temperature Relative Humidity