Abstract:
:Females of the gregarious endoparasitoid Cotesia kariyai were attracted to a blend of volatiles released from corn plants infested with larvae of their host, the common armyworm (Mythimna separata). We investigated the effects of time after the last infestation (1-168 h) on the attractiveness of corn plants infested by host larvae by using a wind tunnel under laboratory conditions. Immediately after the removal of the larvae, parasitoids were attracted more to plants that had been infested with the larvae than to intact plants (control). This attractiveness gradually decreased with time after the last infestation. The attractiveness of the infested plants was significantly higher than that of intact plants when the time after the last infestation was within 1 day. Fifteen herbivore-induced volatiles were recorded in the headspace of infested corn plants irrespective of time. The amounts of some compounds including (Z)-3-hexen-1-yl acetate, which have already been reported to attract C. kariyai, correlated with the attractiveness. The ecological meaning of the duration of production of C. kariyai attractants is discussed.
journal_name
J Chem Ecoljournal_title
Journal of chemical ecologyauthors
Mandour NS,Kainoh Y,Ozawa R,Uefune M,Takabayashi Jdoi
10.1007/s10886-011-9915-6subject
Has Abstractpub_date
2011-03-01 00:00:00pages
267-72issue
3eissn
0098-0331issn
1573-1561journal_volume
37pub_type
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