Keiichi Honda

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Scent and coloration of corolla were examined as floral attributes responsible for preferential visiting by the cabbage butterfly, Pieris rapae, to rape flower, Brassica rapa. Floral volatile components that release the flower-visiting behavior of the butterfly were identified by chemical analyses, electroantennography (EAG), and two behavioral bioassays:(More)
Floral scent compounds of Ligustrum japonicum that affect the foraging behavior of Pieris rapae adults were examined by means of chemical analyses, electroantennogram (EAG) responses, and behavioral bioassays; the behavioral biossays consisted of two tests: reflex extension of proboscis (REP) in response to odor, and attraction to scented and unscented(More)
Exuded tree sap and rotting fruits are important feeding sources for adults of many butterfly species. However, the chemical composition of such rotting foods and the effects of these constituents on butterfly feeding behaviour have rarely been investigated. Chemical analyses revealed that these food sources contain several major components, including(More)
The ovipositional response of a Rutaceae-feeding papilionid butterfly,Papilio protenor, toCitrus host plants was evoked by the synergistic action ofl-(−)-stachydrine,d-(−)-quinic acid, (−)-synephrine, andl-(−)-proline that characterize the chemical compositions of the leaves and epicarp ofCitrus plants (C. natsudaidai andC. unshiu). The stimulatory activity(More)
Most flower visitors innately prefer a particular color and scent, and use them as cues for flower recognition and selection. However, in most cases, since color and scent serve as a combined signal, not only does the preference for an individual cue, but also the preference hierarchy among different cues, influence their flower visitation. In the present(More)
The larval osmeterial secretions of sixPapilio species examined displayed a remarkable qualitative change at the fourth larval ecdysis. The secretions of 4th (penultimate) instar larvae ofP. machaon, P. memnon, P. helenus, P. bianor, andP. maackii principally comprised mono- and/or sesquiterpenoids. The compounds identified from these species included(More)
While adults of most species of butterflies visit flowers for food (nectar), those of certain species can feed on rotting food (e.g., exuded tree sap and rotting fruits). These food sources considerably differ in odor; flowers emit species-specific scents and rotting-food odors are characterized by fermentation products. To determine whether adult(More)
We compared the chemical compositions of the osmeterial secretions of fourth and fifth (last) instars of eight swallowtail species of the tribe Papilionini. Four species (Papilio demoleus, P. polytes, P. paris, and P. macilentus) are Asian Rutaceae-feeding swallowtails. The other four (Chilasa epicydes, C. agestor, P. troilus, and P. glaucus) represent more(More)
RATIONALE AND OBJECTIVES To investigate whether "full" iterative reconstruction, a knowledge-based iterative model reconstruction (IMR), enables radiation dose reduction by 80% at cardiac computed tomography (CT). MATERIALS AND METHODS A total of 23 patients (15 men, eight women; mean age 64.3 ± 13.4 years) who underwent retrospectively(More)
BACKGROUND Model-based type iterative reconstruction algorithms with fast reconstruction times are now available. The clinical feasibility of their reconstruction has not been evaluated adequately. PURPOSE To investigate the effects of model-based type iterative reconstruction, i.e. iterative model reconstruction (IMR), with fast reconstruction time on(More)