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Strategy of freeze tolerance in adult of sunn pest bug (Eurygaster integriceps Put.).

Authors
  • Baghdadi, Ahmed
Type
Published Article
Journal
Communications in agricultural and applied biological sciences
Publication Date
Jan 01, 2007
Volume
72
Issue
3
Pages
469–473
Identifiers
PMID: 18399476
Source
Medline
License
Unknown

Abstract

To investigate cold hardiness of Eurygaster integriceps Put, super cooling points of whole bodies during December to March 2006-2007 were measured on samples collected from altitude of Ghara-aghaj varamin-Iran. In addition, the lower lethal temperature (LLT) was determined for adult insect. The super cooling points were observed about -5 in cold months. Since the minimum temperature under natural condition is reached to-7 degreesC or lower in January and LLT99 (-21.65 degrees C), --11 degreesC lower than their minimum SCP (-10.5 degrees C), therefore I concluded that adult insects are freeze tolerant. Furthermore, super cooling points of different sex, weight and attitude were not significantly different. Freeze tolerance in these insects may be a strategy to provide protection from long-term exposures to ice crystals in microhabitat in alititude.

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