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The chemical analysis of the secretionary covering of Dactylopius perniciosus

Published online by Cambridge University Press:  10 July 2009

Frank Hughes
Frank Hughes
Affiliation:
Chemist to the Khedivial Agricultural Society.
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Extract

The scale [scale here means both the insects and their ovisacs—F. C. W.] contains a small amount of wax which can be separated by solution in boiling alcohol, or better, petrol. From solution in the latter it yields, after recrystallization, a considerable proportion of a hard wax melting at 83°·5 and having a density of 0·970 at 15° C. This is in all probability Cerylcerotate. There is present a mixture of waxes of lower and indefinite meltingpoint.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 1 , Issue 2 , July 1910 , pp. 141
Copyright
Copyright © Cambridge University Press 1910

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