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Observations on the Effect of Exposure to a Low Temperature on Laemophloeus minutus (Ol.) (Col. Cucujidae)

Published online by Cambridge University Press:  10 July 2009

Gwyneth C. Williams
Gwyneth C. Williams
Affiliation:
Ministry of Agriculture and Fisheries Infestation Control Division.
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Extract

Experiment showed that all developmental stages of Lacemophloeus minutus (Ol.) can survive exposure to a temperature of + 2°C. for a limited period which varies with the instar.

The egg was more susceptible to such exposure than any other stage, followed by the first, second and third larval instars and the adult, which did not differ significantly from each other, and then by the fourth-instar larva and pupa which can also be grouped together.

The adult male proved 1·21 times more susceptible than the female to the effects of exposure.

Atmospheric humidity did not influence the mortality of eggs or adults. Previous starvation did not affect the mortality of adults subsequently exposed to + 2°C.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 45 , Issue 2 , June 1954 , pp. 351 - 359
Copyright
Copyright © Cambridge University Press 1954

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