Reference : Effect of ice-nucleating bacteria (Pseudomonas syringae Van Hall) on insect susceptibili...
Scientific journals : Article
Life sciences : Entomology & pest control
http://hdl.handle.net/2268/26068
Effect of ice-nucleating bacteria (Pseudomonas syringae Van Hall) on insect susceptibility to sub-zero temperatures
English
Mignon, Jacques mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Entomologie fonctionnelle et évolutive > >]
Haubruge, Eric mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Entomologie fonctionnelle et évolutive > >]
Gaspar, Charles [Université de Liège - ULg > Gembloux Agro-Bio Tech > Entomologie fonctionnelle et évolutive > >]
1998
Journal of Stored Products Research
Pergamon Press - An Imprint of Elsevier Science
34
1
81-86
Yes (verified by ORBi)
International
0022-474X
[en] Coleoptera ; ice-nucleating bacterium Pseudomonas syringae ; integrated pest management ; Oryzaephilus surinamensis ; Sitophilus granarius
[en] Many stored product insect pests are termed "freeze-intolerant" because they cannot survive ice formation in their extracellular body fluid. In grain silos, the progressive decrease in temperature permits the acclimation of insects and enhances their cold tolerance. The objective of this study was to examine the influence of the concentration of the ice-nucleating-active bacterium Pseudomonas syringae (10, 100 and 1000 ppm), temperature and duration of sub-zero exposure on the cold tolerance of the granary weevil Sitophilus granarius (L.) and the saw-toothed grain beetle Oryzaephilus surinamensis (L.). After an application of 1000 ppm of powdered P. syringae to grain, the mortality of S. granarius and O. surinamensis was increased after 24-h exposure to -4 degrees C. Higher mortality was observed after exposure to colder temperatures and a dose-response relationship was evident. At near-zero (-4 to 0 degrees C) negative temperatures, no dose response was observed, and the mortality in treated grain was the same as that in untreated grain. (C) 1998 Elsevier Science Ltd. All rights reserved.
http://hdl.handle.net/2268/26068

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