The implications of cabbage looper (Trichoplusia ni) : nuclear polyhedrosis virus coevolution for biological control
department or school: Science, Faculty of
department or school: Zoology, Department of
data provider: DSpace
degree campus: UBCV
creator: Milks, Maynard Lionel
issued: 2009-03-27T21:56:08Z
issued: 1996
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Many features make nuclear polyhedrosis viruses (NPVs) an attractive alternative to chemicals as insecticides. However, perhaps the single most appealing feature of NPVs is the possibility that one application of virus could lead to long-term control of the pest. This is because following an initial inoculation, viral particles will be released in the environment at each insect generation, assuring a continuous supply of inoculum. Sustained exposure to NPVs is likely to select for resistance. However, in contrast to chemicals, this might not pose such a problem as NPVs can also evolve and become more virulent. Assessing the coevolutionary trajectory of insect-NPV association is thus critical in determining the potential of these viruses as long-term control agents. In my thesis, I examined the coevolution of cabbage loopers (Trichoplusia ni Hubner) and its associated singly-embedded nuclear polyhedrosis virus (TnSNPV). I chose T. ni because it is a generalist herbivore of great economic importance and because it has a short generation time thus making it a good candidate for studies of evolution.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/6599
extent: 8933652 bytes
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note: THE IMPLICATIONS OF CABBAGE LOOPER (Tr ichop lus ia n i ) - NUCLEAR POLYHEDROSIS VIRUS COEVOLUTION FOR BIOLOGICAL CONTROL by MAYNARD LIONEL MILKS B. S c . , The Un ivers i ty of Ottawa, 1986 M. S c . , The Un ivers i ty of Ottawa, 1988 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY i n THE FACULTY OF GRADUATE STUDIES (Department of Zoology) We accept t h i s thes is as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA August 1996 (c)Maynard L ione l M i l k s , 1996 In presenting this, thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of The University of British Columbia Vancouver, Canada Date ND\f£M&£fL lC, tftJL DE-6 (2/88) i i ABSTRACT Many features make nuclear polyhedrosis v i ruses (NPVs) an a t t r a c t i v e a l te rna t ive to chemicals as i n s e c t i c i d e s . However, perhaps the s i n g l e most appealing feature of NPVs i s the p o s s i b i l i t y that one app l i ca t ion of v i r u s could lead to long-term cont ro l of the pes t . This i s because fo l lowing an i n i t i a l i n o c u l a t i o n , v i r a l p a r t i c l e s w i l l be re leased in the environment at each insect generat ion, assur ing a continuous supply of inoculum. Sustained exposure to NPVs i s l i k e l y to s e l e c t for res is tance . However, i n contrast to chemicals, t h i s might not pose such a problem as NPVs can a lso evolve and become more v i r u l e n t . Assessing the coevolut ionary t ra jec to ry of i n s e c t -NPV assoc ia t ion i s…
has type: Thesis/Dissertation
date issued: 1997-05
is shown at: 10.14288/1.0087930
language: eng
degree discipline: Zoology
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/6599