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  • 1
    Electronic Resource
    Electronic Resource
    Ovipositional response of threeHeliothis species (Lepidoptera: Noctuidae) to allelochemicals from cultivated and wild host plants (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 1817-1827 
    Details
    ISSN: 1573-1561
    Keywords: Cotton ; groundcherry ; tobacco ; Gossypium ; Desmodium ; Physalis ; plant-insect interaction ; host-plant resistance ; Heliothis spp. ; Lepidoptera ; Noctuidae ; oviposition stimulant ; oviposition deterrent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The role of plant allelochemicals on the oviposition behavior ofHeliothis virescens (F.),H. subflexa (Guenee), andH. zea (Boddie) was investigated in the laboratory using a “choice” bioassay system. Fresh young leaves of tobacco,Desmodium tortuosum (Swartz) de Candolle, groundcherry (Physalis angulata L.), and cotton (Gossypium hirsutum L.) squares (flower buds) were washed in methylene chloride or methanol, concentrated to 1 g equivalent of washed material, and applied to a cloth oviposition substrate. Each of the extracts—including groundcherry, a nonhost—stimulated oviposition byH. virescens. H. subflexa were stimulated to oviposit by groundcherry extract, its normal host, and extract from cotton squares, a nonhost. None of the extracts stimulated oviposition byH. zea, although all except groundcherry were from reported hosts. The sensitivity of the bioassay was confirmed by givingH. virescens andH. subflexa an opportunity to choose between extracts that showed stimulant qualities when tested independently versus only solvent-treated controls. In these tests, tobacco showed the highest level of stimulant activity forH. virescens; groundcherry exhibited the highest level of stimulation forH. subflexa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020496
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  • 2
    Electronic Resource
    Electronic Resource
    Flight response ofHeliothis subflexa (Gn.) females (Lepidoptera: Noctuidae) to an attractant from groundcherry,Physalis angulata L. (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 221-231 
    Details
    ISSN: 1573-1561
    Keywords: Heliothis subflexa ; Lepidoptera ; Noctuidae ; attractant ; kairomone ; groundcherry ; Physalis angulatus ; flight tunnel bioassay ; plant-insect interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Mated femaleHeliothis subflexa (Gn.) (HS) moths 1–7 days old responded positively in a Plexiglas flight tunnel to an attractant extracted with methanol from fresh whole-leaf washes of groundcherry,Physalis angulata L. Response to the groundcherry extract, as indicated by plume-tracking (i.e., upwind flight toward the odor source) and contact with the chemical dispenser did not change significantly during the first 5 hr of scotophase. Overall, ca. 50% of the responding moths also landed on the chemical dispenser; ca. 50% of the moths that landed also deposited eggs. There were no significant differences in the behavioral responses of females mating only once and those that had mated two or more times. Virgin females and male moths were significantly less responsive to the groundcherry attractant than mated females. The flight tunnel bioassay described provides an excellent system for evaluating plant allelochemics associated with host-plant selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02027784
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  • 3
    Electronic Resource
    Electronic Resource
    Preferences of matedHeliothis virescens andH. subflexa females for host and nonhost volatiles in a flight tunnel (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 2889-2898 
    Details
    ISSN: 1573-1561
    Keywords: Cotton ; tobacco ; groundcherry ; Physalis ; Desmodium ; Heliothis subflexa ; Heliothis virescens ; Lepidoptera ; Noctuidae ; plant-insect interaction ; host-plant resistance ; attractant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In flight-tunnel bioassays, mated femaleHeliothis subflexa (Gn.) moths demonstrated in dual-choice tests a significant preference for volatiles from an extract of their only known host,Physalis spp. (groundcherry). However,H. virescens (F.), a polyphagous species, responded positively by anemotaxis to extracts from susceptible tobacco, cotton,Desmodium tortuosum (host plants), and groundcherry, a nonhost.H. virescens females did not fly to volatiles emanating from an extract of a resistant tobacco cultivar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00979481
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