The Influence of Low Temperatures on Two Species of Carpophilus (Col,, Nitidulidae)¹
By E. DONAHAYE, S. NAVARRO, and MIRIAM RINDNER
Department of Stored Products, ApidtmaIlResearch Organization, The Voluni Center, Bet Dagan, Israel
Abstract: The effect of exposure to 0°C, -5°C, -10°C and -18°C was investigated on all developmental stages of Carpophilis hemipterus L. and C. mutilatuss Er.
Exposure to 0°C caused relatively slow kill. Lethal exposure time (LT₉₉ was longest (317.30 h) for larvae of C. hempiterus. At -5°C, exposure times required to control both species were also prolonged. Pupae were the most resistant stage, about 90 h being needed to produce 99% kill of both species. At -10°C, mortality of both species was rapid, pupae the most resistant stage, 10.35 h was required for LT₉₉. Exposure to -18°C caused very rapid kill of both species. LT₉₉ of all stages being obtained within 2.25 h.
Key Words:
