Campus Access Only
All rights reserved. This publication is intended for use solely by faculty, students, and staff of University of the Pacific. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, now known or later developed, including but not limited to photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author or the publisher.
Date of Award
Thesis - Pacific Access Restricted
Master of Science (M.S.)
Alice S. Hunter
A laboratory colony of a multi-insecticide susceptible strain of the housefly, Musca domestica was challenged with continuous larval selection pressure equivalent to the initial LC 60 level for 8 generations with the insect growth regulator WL 86303 (1-(3,5-dichloro-4)4-nitrophenoxy- phenyl)-3 -(2)chlorobenzoyl)- urea). A more than twofold increase in resistance was observed at the F8 generation. No cross-tolerance to the related compound, diflubenzuron (DIMILIN (R)) (1-(4-chlorophenyl)-3- (2,6-difluorobenzoyl)-urea) was observed after 8 generations. WL 86303 was significantly less toxic to houseflies than diflubenzuron. No significant difference was noted between the toxicity of WL 86303 to an unpressured wild housefly strain, and to the unselected multi-susceptible strain. A larval-rearing bioassay technique for measuring the toxicity levels of juvenile developmental disruptors is described.
Codrea, Mary Elizabeth. (1982). Experimental induction of resistance to an acylurea insect growth regulator : a thesis .... University of the Pacific, Thesis - Pacific Access Restricted. https://scholarlycommons.pacific.edu/uop_etds/2072
To access this thesis/dissertation you must have a valid pacific.edu email address and log-in to Scholarly Commons.Find in PacificSearch
If you are the author and would like to grant permission to make your work openly accessible, please email