NOTE: This item is not available outside the Texas A&M University network. Texas A&M affiliated users who are off campus can access the item through NetID and password authentication or by using TAMU VPN. Non-affiliated individuals should request a copy through their local library's interlibrary loan service.
Factors influencing organophosphorus insecticide resistance in tobacco budworms
| dc.contributor.advisor | Bull, D. L. | |
| dc.creator | Whitten, Chandler James | |
| dc.date.accessioned | 2020-01-08T18:15:57Z | |
| dc.date.available | 2020-01-08T18:15:57Z | |
| dc.date.created | 1975 | |
| dc.date.issued | 1974 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/DISSERTATIONS-182039 | |
| dc.description.abstract | The toxicity, metabolism, and absorption of several selected insecticides were compared between methyl parathion-susceptible (S) and -resistant (R) strains of the tobacco budworm (Heliothis virescens (F.)) to assess the influence of detoxification and absorption in the resistance exhibited by the R larvae. In addition, the relationships of certain chemical structures of dialkyloxy arylphosphate compounds to toxicity, metabolism, and absorption were evaluated. Toxicity tests made with 3rd-stage larvae indicated that the R larvae were resistant (as evidenced by a 5-fold or greater increase in the LD [subscript 50] value of an insecticide as compared with that from S larvae) to methyl parathion, methyl paraoxon, paraoxon, parathion, and fospirate, but not to chlorpyrifos, chlorpyrifosmethyl, or Dowco [superscript R] 180. Those compounds containing dimethoxy groups were more toxic than their corresponding diethoxy homologues to larvae of both strains. | en |
| dc.format.extent | 93 leaves | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | eng | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
| dc.subject | Entomology | en |
| dc.title | Factors influencing organophosphorus insecticide resistance in tobacco budworms | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Entomology | en |
| thesis.degree.grantor | Texas A&M University | en |
| thesis.degree.name | Doctor of Philosophy | en |
| thesis.degree.level | Doctoral | en |
| dc.contributor.committeeMember | Keeley, L. L. | |
| dc.contributor.committeeMember | Krise, G. M. | |
| dc.contributor.committeeMember | Pace, C. N. | |
| dc.contributor.committeeMember | Price, M. A. | |
| dc.type.genre | dissertations | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
| dc.publisher.digital | Texas A&M University. Libraries |
Files in this item
This item appears in the following Collection(s)
-
Digitized Theses and Dissertations (1922–2004)
Texas A&M University Theses and Dissertations (1922–2004)
Request Open Access
This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.