Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz (1997) 70, 81-86

Ch. Ulrichs and Ch. Reichmuth (1997)
Einfluß physikalischer Parameter auf die Bekämpfung des Tabakkäfers Lasioderma serricorne Fab. (Col.: Anobiidae) mit Kohlenstoffdioxid unter Hochdruck
[Influence of physical parameters on the control of the tobacco beetle Lasioderma serricorne Fab. (Coleoptera: Anobiidae) with carbon dioxide under high pressure]
Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 70 (5), 81-86
Abstract: The tobacco beetle leeds to severe losses in stored tobacco and tobacco products, drugs, spices and other foodstuffs. Eggs of Lasioderma serricorne died after treatment in a thermostatisized pressure chamber of 100 ml at 20 °C with 25 bar, 34 bar, 35 bar and 40 bar CO₂, respectively, after 80, 52, 37 and 20 min, respectively. Reduction of the temperature to 15 °C required expansion of the lethal treatment time of about 25%. Control of larvae! was obtained at equal conditions after 30, 15, 7 and 3 min, respectively, with similar tendency after reduction of the temperature. Increase of the temperature to 35 °C reduced that lethal exposure time for also about 25%. At 20 bar 120 min were necessary at 15 °C, 95 min at 25 °C and 20 min at 35 °C, for complete control (LD₉₅).
With adult beetles in addition to the mentioned parameters 15 bar CO₂ at 25 °C required 48 min, 20 bar 25 min, 30 bar 3 min, 35 bar 2 min and 40 bar 1 min for complete control. Cooling at 15 °C led to expansion of the lethal time at 15 bar to 150 min, at 20 bar to 40 min, at 25 bar to 30 min and at 30 bar to 10 min, respectively. Heating to 35 °C helped to reduce these times by about 50% at the given conditions.
Efficacy of this method seems to be strongly temperature dependent. The absolute effects are greater at pressure of 20 bar than at 30 bar. With 5 min treatment of adult tobacco beetles at 25°C and 20 bar CO₂ and time to build up the pressure: and pressure decay time of 1 min reduced efficacy to 20%. Especially the change of the decay time had strong influence on the mortality achieved. Presumably this effect can be linked to appearance and of gas bubbles and mechanical destruction of cell membranes and organs due to quick expansion.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website
Database assignments for author(s): Christian Ulrichs

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lasioderma serricorne		Germany