Metabolism and penetration of permethrin in resistant and susceptible strains of tobacco budworm, Heliothis virescens (F)

Persistent Link:
http://hdl.handle.net/10150/276876
Title:
Metabolism and penetration of permethrin in resistant and susceptible strains of tobacco budworm, Heliothis virescens (F)
Author:
Kelly, Suzanne Eleanor, 1960-
Issue Date:
1988
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A laboratory selected strain of Heliothis virescens demonstrating a 400-fold resistance to permethrin exhibited no differences in penetration and only a slight enhancement of metabolism when compared with a susceptible strain. Synergism with piperonyl butoxide and DEF produced similar synergist ratios for the resistant and susceptible strains, but the resistant strain showed a much larger synergist difference. Thin layer chromatography of extracts from larvae dosed with 14C-labelled permethrin demonstrated a small increase in metabolism of the cis-isomer by the resistant strain, but no differences in metabolism of the trans-isomer. The synergism study and the 14C-labelled permethrin experiment both indicate that there is a small increase in metabolism of permethrin in the resistant strain, but not enough to account for the greatly increased LD50 value. Cross-resistance to DDT indicated that target site insensitivity may play a major role in resistance to pyrethroids in this strain.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Heliothis zea.; Pyrethroids.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Entomology
Degree Grantor:
University of Arizona
Advisor:
Watson, Theo F.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleMetabolism and penetration of permethrin in resistant and susceptible strains of tobacco budworm, Heliothis virescens (F)en_US
dc.creatorKelly, Suzanne Eleanor, 1960-en_US
dc.contributor.authorKelly, Suzanne Eleanor, 1960-en_US
dc.date.issued1988en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA laboratory selected strain of Heliothis virescens demonstrating a 400-fold resistance to permethrin exhibited no differences in penetration and only a slight enhancement of metabolism when compared with a susceptible strain. Synergism with piperonyl butoxide and DEF produced similar synergist ratios for the resistant and susceptible strains, but the resistant strain showed a much larger synergist difference. Thin layer chromatography of extracts from larvae dosed with 14C-labelled permethrin demonstrated a small increase in metabolism of the cis-isomer by the resistant strain, but no differences in metabolism of the trans-isomer. The synergism study and the 14C-labelled permethrin experiment both indicate that there is a small increase in metabolism of permethrin in the resistant strain, but not enough to account for the greatly increased LD50 value. Cross-resistance to DDT indicated that target site insensitivity may play a major role in resistance to pyrethroids in this strain.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectHeliothis zea.en_US
dc.subjectPyrethroids.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineEntomologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorWatson, Theo F.en_US
dc.identifier.proquest1335695en_US
dc.identifier.oclc22173980en_US
dc.identifier.bibrecord.b17366859en_US
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