Abstract
An oviposition bioassay for the onion maggot,Hylemya antiqua (Meigen), is described in which females, in response to volatile stimulants, oviposit through small apertures onto moistened filter paper. Onion volatiles that act as attractants and oviposition stimulants were captured in Porapak Q from air passed over chopped onions in glass chambers. Pentane extracts from odor-impregnated Porapak Q induced ∼ 30–50% of the oviposition that occurred in response to 15-g onion-slice stimuli. Extracts presented in pentane on waxed dental cotton wicks induced more constant oviposition over a 3-day period than extracts on unwaxed wicks. Extract of the Porapak Q-captured volatiles from bulbs of fresh, actively growing onions elicited a much stronger response than did stem and leaf extracts from the same onions. The bioassay techniques and chemical procedures developed in this study could be used in chemical isolation programs for host attractants or oviposition stimulants forH. antiqua or similar species.
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Diptera:Anthomyiidae.
Research supported by National Research Council of Canada, Grant Nos. A3881 and A3706.
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Vernon, R.S., Borden, J.H., Pierce, H.D. et al. Host selection byHylemya antiqua laboratory bioassay and methods of obtaining host volatiles. J Chem Ecol 3, 359–368 (1977). https://doi.org/10.1007/BF00988179
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DOI: https://doi.org/10.1007/BF00988179