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Eonomical Heat Treatment for Bedbugs Philip G. Koehler, Roberto Pereira, and Margie Pfiester Urban Entomology Building 352-392-2484

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Presentation on theme: "Eonomical Heat Treatment for Bedbugs Philip G. Koehler, Roberto Pereira, and Margie Pfiester Urban Entomology Building 352-392-2484"— Presentation transcript:

1 Eonomical Heat Treatment for Bedbugs Philip G. Koehler, Roberto Pereira, and Margie Pfiester Urban Entomology Building

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4 Thermal Death Point for Bed Bugs degrees Fahrenheit degrees Celsius

5 Killing Bed Bugs Bed bugs at least 113 F

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7 Commercial Heat Treatment Heat whole room or whole structure Expensive equipment –$20,000-$50,000 Lengthy procedure No residual effect Very visible

8 Commercial Heat Treatment

9 Bed Bug Whole Room Heat Treatment

10 Effect of High Temperatures on Bed Bugs Expose bed bugs to high temperatures in a water bath –2 bugs per tube –Temperatures of F –Exposures of min Record bed bug mortality –1 min later –24 h later

11 How long does it take to kill bed bugs with heat? 106 o F 100 min 109 o F 25 min 113 o F 4 min 117 o F 2 min 120 o F 1 min Minutes to 100% Mortality

12 Rise in Temperature of 7 degrees F decreases time to kill by10 times Thermal Death Time Curve

13 Summary of Lab Studies Temperatures above 106 F kill bed bugs An increase of 7 F reduces time to kill by 10 times –>100 min at 106 F –10 min at 113 F –1 min at 120 F Heat is the “Achilles heel” for bed bugs

14 First attempt at heat treatment 6 mil poly sheeting Space heater Oscillating fan 2 heaters

15 First attempt at heat treatment Polyethylene 6 mil poly sheeting 2 space heaters

16 First attempt at heat treatment Polyethylene Too much heat loss with Polyethylene sheeting F F Started: 9 AM Ended: 4 PM F FF

17 Second attempt at heat treatment Poly sheeting covered with blankets 4 heaters and fans

18 Second attempt at heat treatment Blankets F F Started: 9:30 AM Ended: 3:07 PM F FF

19 Second attempt at heat treatment Blankets

20 Third Attempt at Heat Treatment Styrofoam Heat Chamber Carpeted floor

21 Third Attempt at Heat Treatment Styrofoam Heat Chamber Under mattress F 141 F Started: 9:00 AM Ended: 11:20 PM Under pillow F FF

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23 Fourth Attempt at Heat Treatment Styrofoam Heat Chamber Tile floor Fans/Heaters poorly placed F FF

24 Summary of Field Tests Space heaters can heat up to F –Oil-filled eliminates chance of fire Styrofoam heat box contains heat better than plastic or blankets –2 inch thick styrofoam Tile/Concrete floors need to be insulated –Carpet padding or foam play pads Circulation of heat is important –Fan & heater placement at opposite corners

25 Equipment for Heat Treatment 6 polystyrene sheets 2 box fans 2 heaters Extension cords and power strip 1 oscillating fan

26 Insulation for Floors: Tile/Terrazo/Concrete Carpet remnants Interlocking foam play pads

27 Temperature Monitoring ThermometersData Loggers

28 Equipment 2 Space heaters –$99.90

29 Equipment 6 Polystyrene sheets (4 by 8 ft) –$137.76

30 Equipment 2 Box fans –$27.34

31 Equipment 1 Oscillating fan –$29.95

32 Equipment 2 Thermometers –$17.94

33 Equipment Costs $ Space heaters 6 Polystyrene sheets 2 Box fans 1 Oscillating fan 2 Thermometers 2 Extension cords; power strip Duct or packing tape

34 Set-up of heat chamber for bed bug control Bed Foam insulation Fan Heater

35 Power Considerations One circuit for each fan and heater Heater –Draws ~12 amps Fan –Draws ~3 amps Total –~15 amps 20 amp circuit breakers

36 Residual Insecticide Application to Room Perimeter

37 Important Points for Heat Treatment Check amperage of outlets –Plug heaters into 2 separate circuits Position of thermometers is important –Place where heat will take longest to get hot –Like cooking a turkey Heat containment/circulation is important –Like a convection oven –Floor & box insulation –Fans to create most turbulence Treat room with residual product

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