The Effect of Larval Diet and Sex on Nectar Nicotine Feeding Preferences in Manduca Sexta (Lepidoptera: Sphingidae)
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Synergy between visual and olfactory cues in nectar feeding by wild hawkmoths, Manduca sexta
We performed field experiments to measure the relative importance of olfactory and visual cues in nectar foraging by wild tobacco hornworm moths, Manduca sexta (Lepidoptera, Sphingidae) in the Sonoran Desert of Arizona, U.S.A. We manipulated flowers of sacred Datura (Datura wrightii; Solanaceae) to experimentally decouple floral scent from visual display and presented these cues to free-flying ...
متن کاملMolecular interactions between the specialist herbivore Manduca sexta (Lepidoptera, Sphingidae) and its natural host Nicotiana attenuata. II. Accumulation of plant mRNAs in response to insect-derived cues.
The transcriptional changes in Nicotiana attenuata Torr. ex Wats. elicited by attack from Manduca sexta larvae were previously characterized by mRNA differential display (D. Hermsmeier, U. Schittko, I.T. Baldwin [2001] Plant Physiol 125: 683-700). Because herbivore attack causes wounding, we disentangled wound-induced changes from those elicited by M. sexta oral secretions and regurgitant (R) w...
متن کاملMolecular interactions between the specialist herbivore Manduca sexta (Lepidoptera, Sphingidae) and its natural host Nicotiana attenuata. III. Fatty acid-amino acid conjugates in herbivore oral secretions are necessary and sufficient for herbivore-specific plant responses.
Feeding by the tobacco specialist Manduca sexta (Lepidoptera, Sphingidae) and application of larval oral secretions and regurgitant (R) to mechanical wounds are known to elicit: (a) a systemic release of mono- and sesquiterpenes, (b) a jasmonate burst, and (c) R-specific changes in transcript accumulation of putatively growth- and defense-related mRNAs in Nicotiana attenuata Torr. ex Wats. We i...
متن کاملBombykal, a Sex Pheromone of the Sphinx Moth Manduca sexta
The first sex pheromone of a Sphinx moth has been isolated from Manduca sexta (Lepidoptera: Sphingidae) with the aid of an electroantennogram assay. It is attractive to males in a field test where its activity might be augmented by a second component in female extracts. Chemical tests and chromatographic properties identify the pheromone as a C16-aldehyde with a pair of conjugated double bonds....
متن کاملSensory flexibility in hawkmoth foraging behavior: lessons from Manduca sexta and other species.
Introduction Neuroethologists wish to understand how animals detect, integrate and perceive sensory stimuli relevant to complex behaviors, and how such processes are modified by physiological state and experience. The tobacco hornworm moth (Manduca sexta) is an excellent model organism for these purposes, due to its large size, rapid generation time and well-defined adult behaviors. Upwind-flig...
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