{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/92809"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/92809","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Orientation of polyphagous lepidoptera to hostplant kairomones","abstract":"Although in some oligophagous lepidopterans oviposition kairomones from hostplants can also serve as larval feeding stimulants, the relationships in chemistry of attraction of larval and adult stages to hostplants have rarely been examined in polyphagous species. Volatile constituents are known to serve as attractants for ovipositing moths. These compounds differentially stimulate electrophysiological responses in antennae of male and female moths and can also serve as larval attractants. Similarly, ovipositing female adults and feeding larvae use contact cues for hostplant evaluation. In this study, I reviewed the literature to determine if any patterns of relationship between adult and larval host recognition cues in polyphagous Lepidoptera have been detected in previous studies (Chapter 1). I then conducted a series of behavioral assays with the navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae), a highly polyphagous species, to determine if larvae of the navel orangeworm respond behaviorally to the same secondary compounds that elicit behavioral or electrophysiological responses in adult moths. In Petri dish arenas, navel orangeworm larvae showed a preference for 1-octen-3-ol and 2-phenylethanol, and aversion to ethyl benzoate out of a total of 9 tested compounds that are electrophysiologically active in male or female adults. The same behavioral assay was also used to investigate the role of volatiles emitted by a potentially mutualistic Aspergillus fungus in larval orientation behavior. Larvae were strongly attracted to methanolic extracts of almond meal spiked with fungal volatiles. In one case, larvae even preferred almond extract spiked with fungal volatiles over pure almond extract. This information may prove useful in refining current control systems for navel orangeworm; for example, my findings suggest that replacing lures when they become moldy may be counterproductive, and that adding volatiles to pesticide formulations may be effective in attracting larvae to areas that have been treated, thereby increasing the likelihood of encountering the pesticide.","abstract_html":"Although in some oligophagous lepidopterans oviposition kairomones from hostplants can also serve as larval feeding stimulants, the relationships in chemistry of attraction of larval and adult stages to hostplants have rarely been examined in polyphagous species. Volatile constituents are known to serve as attractants for ovipositing moths. These compounds differentially stimulate electrophysiological responses in antennae of male and female moths and can also serve as larval attractants. Similarly, ovipositing female adults and feeding larvae use contact cues for hostplant evaluation. In this study, I reviewed the literature to determine if any patterns of relationship between adult and larval host recognition cues in polyphagous Lepidoptera have been detected in previous studies (Chapter 1). I then conducted a series of behavioral assays with the navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae), a highly polyphagous species, to determine if larvae of the navel orangeworm respond behaviorally to the same secondary compounds that elicit behavioral or electrophysiological responses in adult moths. In Petri dish arenas, navel orangeworm larvae showed a preference for 1-octen-3-ol and 2-phenylethanol, and aversion to ethyl benzoate out of a total of 9 tested compounds that are electrophysiologically active in male or female adults. The same behavioral assay was also used to investigate the role of volatiles emitted by a potentially mutualistic Aspergillus fungus in larval orientation behavior. Larvae were strongly attracted to methanolic extracts of almond meal spiked with fungal volatiles. In one case, larvae even preferred almond extract spiked with fungal volatiles over pure almond extract. This information may prove useful in refining current control systems for navel orangeworm; for example, my findings suggest that replacing lures when they become moldy may be counterproductive, and that adding volatiles to pesticide formulations may be effective in attracting larvae to areas that have been treated, thereby increasing the likelihood of encountering the pesticide.","abstract_has_math":false,"creators":["Lawrance, Allen V"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Entomology","degree_department":null,"school":null,"contributors":["Berenbaum, May R.","Hanks, Lawrence","Seigler, David"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-11-10T17:54:55Z","date_published":"2016-11-10T17:54:55Z","updated_at":"2026-07-22T22:26:35Z","subjects":["kairomone","Lepidoptera","hostplant","navel orangeworm"],"languages":["en"],"rights":["Copyright 2016 Allen Lawrance"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/92809","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Berenbaum, May R.","Hanks, Lawrence","Seigler, David"]},{"key":"dc:creator","label":"Author","values":["Lawrance, Allen V"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-11-10T17:54:55Z","2016-07-12","2016-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Entomology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["kairomone","Lepidoptera","hostplant","navel orangeworm"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Allen Lawrance"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/92809"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Although in some oligophagous lepidopterans oviposition kairomones from hostplants can also serve as larval feeding stimulants, the relationships in chemistry of attraction of larval and adult stages to hostplants have rarely been examined in polyphagous species. Volatile constituents are known to serve as attractants for ovipositing moths. These compounds differentially stimulate electrophysiological responses in antennae of male and female moths and can also serve as larval attractants. Similarly, ovipositing female adults and feeding larvae use contact cues for hostplant evaluation. In this study, I reviewed the literature to determine if any patterns of relationship between adult and larval host recognition cues in polyphagous Lepidoptera have been detected in previous studies (Chapter 1). I then conducted a series of behavioral assays with the navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae), a highly polyphagous species, to determine if larvae of the navel orangeworm respond behaviorally to the same secondary compounds that elicit behavioral or electrophysiological responses in adult moths. In Petri dish arenas, navel orangeworm larvae showed a preference for 1-octen-3-ol and 2-phenylethanol, and aversion to ethyl benzoate out of a total of 9 tested compounds that are electrophysiologically active in male or female adults. The same behavioral assay was also used to investigate the role of volatiles emitted by a potentially mutualistic Aspergillus fungus in larval orientation behavior. Larvae were strongly attracted to methanolic extracts of almond meal spiked with fungal volatiles. In one case, larvae even preferred almond extract spiked with fungal volatiles over pure almond extract. This information may prove useful in refining current control systems for navel orangeworm; for example, my findings suggest that replacing lures when they become moldy may be counterproductive, and that adding volatiles to pesticide formulations may be effective in attracting larvae to areas that have been treated, thereby increasing the likelihood of encountering the pesticide.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-11-09 without embargo terms","The student, Allen Lawrance, accepted the attached license on 2016-07-12 at 08:38.","The student, Allen Lawrance, submitted this Thesis for approval on 2016-07-12 at 08:48.","This Thesis was approved for publication on 2016-07-12 at 10:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9878 on 2016-11-09 at 10:24:09","Made available in DSpace on 2016-11-10T17:54:55Z (GMT). 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These compounds differentially stimulate electrophysiological responses in antennae of male and female moths and can also serve as larval attractants. Similarly, ovipositing female adults and feeding larvae use contact cues for hostplant evaluation. In this study, I reviewed the literature to determine if any patterns of relationship between adult and larval host recognition cues in polyphagous Lepidoptera have been detected in previous studies (Chapter 1). I then conducted a series of behavioral assays with the navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae), a highly polyphagous species, to determine if larvae of the navel orangeworm respond behaviorally to the same secondary compounds that elicit behavioral or electrophysiological responses in adult moths. In Petri dish arenas, navel orangeworm larvae showed a preference for 1-octen-3-ol and 2-phenylethanol, and aversion to ethyl benzoate out of a total of 9 tested compounds that are electrophysiologically active in male or female adults. The same behavioral assay was also used to investigate the role of volatiles emitted by a potentially mutualistic Aspergillus fungus in larval orientation behavior. Larvae were strongly attracted to methanolic extracts of almond meal spiked with fungal volatiles. In one case, larvae even preferred almond extract spiked with fungal volatiles over pure almond extract. This information may prove useful in refining current control systems for navel orangeworm; for example, my findings suggest that replacing lures when they become moldy may be counterproductive, and that adding volatiles to pesticide formulations may be effective in attracting larvae to areas that have been treated, thereby increasing the likelihood of encountering the pesticide.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-11-09 without embargo terms","The student, Allen Lawrance, accepted the attached license on 2016-07-12 at 08:38.","The student, Allen Lawrance, submitted this Thesis for approval on 2016-07-12 at 08:48.","This Thesis was approved for publication on 2016-07-12 at 10:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9878 on 2016-11-09 at 10:24:09","Made available in DSpace on 2016-11-10T17:54:55Z (GMT). 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