Co-Authors:
Isikber, A.A., Dept. of Plant Protection, Faculty of Agriculture, Univ. of Kahramanmaras Sutcu Imam, Kahramanmaras, 46060, Turkey
Navarro, S., Dept. of Food Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Finkelman, S., Dept. of Food Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Rindner, M., Dept. of Food Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Dias, R., Dept. of Food Science, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Abstract:
Toxicity of propylene oxide (PPO) at low pressure against the most common stored-product insect, Tribolium castaneum (Herbst), over a short exposure time, was tested at three different temperatures (16°, 22° and 30°C). Toxicities of PPO at 100 mm Hg were strongly influenced by ambient temperature. LD50 and LD99 toxicities ranged from 4.7 to 28.9 mg l -1 and from 10.5 to 72.6 mg l-1 respectively, showing that susceptibility was positively correlated to the temperature. The LD 99 values for all life stages (except the larval stage) were significantly lower at 30° than those at 16° and 22°C. However, the LD99 values for all life stages (except the pupal stage) at 16° were not significantly different from those at 22°C. A concentration x time (Ct) product of 291, 171 and 98 mg h/l was required to obtain complete mortality (99%) of T. castaneum at 16°, 22° and 30°C, respectively. Thus, the efficacy of PPO at 100 mm Hg to all life stages of T. castaneum also decreased as the temperature decreased from 30° to 16°C.
תפריט נגישות
ניגודיות עדינה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם
