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The Effect of Low Temperatures on some Predacious Phytoseiid Mites, and on the Brown Mite Bryobia arborea M. & A.1

Published online by Cambridge University Press:  31 May 2012

A. W. MacPhee
A. W. MacPhee
Affiliation:
Research Station, Canada Dept. of Agriculture, Kentville. N.S.
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Abstract

The mean freezing point of adults of T. pyri was about −20° F., of T. finlandicus −22° F., and of T. rhenanus −24.5° F. The responses of T. fallacis and P. macropilis to low temperatures were about the same as T. pyri. The effect of the duration of exposure on the last three species was to increase the mortality about 12 to 15 per cent for each doubling of the duration of exposure from 0.5 to eight hours at −10° F. or lower.

The phytophagous brown mite, B. arborea, had a mean freezing point of −26° F. and the effect of duration of exposure was to increase the mortality eight to ten per cent each time the period of exposure was doubled from 0.25 to 16 hours at −24° F. or lower.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 1 , January 1963 , pp. 41 - 44
Copyright
Copyright © Entomological Society of Canada 1963

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References

Hartzell, Albert. 1957. Red pine scale with special reference to its host plants and cold hardiness. Contrib. Boyce Thompson Inst. 18, 421–428.Google Scholar
Lord, F. T., and MacPhee, A. W.. 1953. The influence of spray programs on the fauna of apple orchards in Nova Scotia. VI. Low temperature and the natural control of the oyster-shell scale, Lepidosaphes ulmi (L.) (Homoptera: Coccidae). Canadian Ent. 85, 282–291.CrossRefGoogle Scholar
Mail, G. A., and Salt, R. W.. 1933. Temperature as a possible limiting factor in the northern spread of the Colorado potato beetle. J. Econ. Ent. 26, 1068–1075.CrossRefGoogle Scholar
MacPhee, A. W. 1961. Mortality of winter eggs of the European red mite Panonychus ulmi (Koch), at low temperatures, and its ecological significance. Can. J. Zool. 39, 229–243.CrossRefGoogle Scholar
Putman, Wm. L. 1959. Hibernation sites of Phytoseiids (Acarina: Phytoseiidae) in Ontario peach orchards. Canadian Ent. 91, 735–741.CrossRefGoogle Scholar