eTheses Repository

Contribution to the study of mealy bugs of the Tribe Pseudococcini (Coccidae) with special reference to the genus Pseudococcus

Brain, Chas K. (1914)
Other thesis, University of Birmingham.

Loading
PDF (24Mb)Accepted Version

Abstract

Mealy-bugs may, under certain conditions, become pests of the highest economic importance. This, fact was well illustrated in the case of D. filamentosus (Ckll.) in
1909, when this insect attacked the Lebbek trees in the streets of Cairo and became so numerous that
large trees were killed by their ravages in a few months.
In addition to the actual loss of plants, or the damage caused to them by large numbers of the insects sucking their sap, the fruit or fruit clusters are often rendered quite unfit for market by the vast number of females with ovisacs which infest them.
Very few Coccidologists, however, have paid particular attention to this group, and our knowledge of even the most common species is very imperfect.
The only reference to many of the mealy bugs is found in the original descriptions of the species, and it is unfortunate that many of these descriptions are quite inadequate for the determination of material. This inadequacy may be due to the shortness and incompleteness of the descriptions themselves, or to the unsuitability of the characters used.
I have endeavoured to collect the most important facts concerning all the species described to the end of 1913, and to arrange the matter in a manner suitable for further study[...]

Type of Work:M.A. thesis.
School/Faculty:Faculties (to 1997) > Faculty of Science
Department:Biology
Subjects:QH Natural history
QK Botany
SB Plant culture
Institution:University of Birmingham
ID Code:3686
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
Export Reference As : ASCII + BibTeX + Dublin Core + EndNote + HTML + METS + MODS + OpenURL Object + Reference Manager + Refer + RefWorks
Share this item :
QR Code for this page

Repository Staff Only: item control page