INCREASED TOXICITY OF LOW OXYGEN ATMOSPHERES SUPPLEMENTED WITH CARBON DIOXIDE ON TRIBOLIUM CASTANEUM ADULTS
- 1 January 1979
- journal article
- research article
- Published by Wiley in Entomologia Experimentalis et Applicata
- Vol. 25 (1) , 39-44
- https://doi.org/10.1111/j.1570-7458.1979.tb02846.x
Abstract
T. castaneum adults were exposed to atmospheres containing O2 concentrations of 2%‐5% supplemented with 5%‐35% CO2 at 26° and 30° for 24–120 hr at 57% relative humidity. Mortality of insects at the given O2 concentrations was higher when the level of the added CO2 was increased, the temperature was higher and the exposure time was extended. A significant interaction was found between the levels of O2 and CO2 tested, indicating the clear synergistic effect of these two gases on the mortality of test insects.RÉSUMÉ: EFFETS SYNERGIQUES SUR LES ADULTES DE TRIBOLIUM CASTANEUM D'ATMOSPHERES A FAIBLES CONCENTRATIONS D'OXYGENE, ENRICHIES EN GAZ CARBONIQUEDes groupes d'adultes de 7 à 10 jours de T. castaneum ont été exposés à des atmosphères à teneurs en O2 de 2, 3, 4 et 5% avec enrichissement en CO2 variant entre 5% et 35%. Les expériences, effectuées aux températures 26° et 30° et 57% d'humidité relative, ont duré 120 heures.Aucune mortalité totale n'a été observée chez les insectes exposés aux faibles concentrations d'O2 sans addition de CO2, tandis qu'à 2% de O2 une addition de 10% de CO2 provoque à 26° une mortalité totale; le même résultat est obtenu à 30° en ajoutant seulement du CO2 à 5%. Quand la teneur en O2 est de 5%, il faut 35% de CO2 pour obtenir une mortalité totale aux deux températures.Pour une concentration en O2 donnée, la mortalité augmente avec la concentration en CO2, la température et la durée d'exposition. Il y a des actions réciproques réelles entre les concentrations en O2 et CO2, ce qui montre un effet typiquement synergique des deux gaz sur la mortalité des T. castaneum testés.This publication has 9 references indexed in Scilit:
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