INSTAR-SPECIFIC DEFENSE OF THE PEA APHID, ACYRTHOSIPHON-PISUM - INFLUENCE ON OVIPOSITION SUCCESS OF THE PARASITE APHELINUS-ASYCHIS (HYMENOPTERA, APHELINIDAE)

被引:110
作者
GERLING, D
ROITBERG, BD
MACKAUER, M
机构
[1] The George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv
[2] Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, B.C.
关键词
Acyrthosiphon pisum; Aphelinidae; Aphelinus asychis; behavior; defense reactions; host selection; oviposition; parasite; pea aphid;
D O I
10.1007/BF01052014
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The parasite Aphelinus asychis Walker (Hymenoptera: Aphelinidae) oviposits in all four instars of the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Aphididae). Searching females display a highly stereotyped sequence of behaviors when encountering a host. Once recognized, an aphid is examined and probed by the wasp with the everted ovipositor prior to oviposition. Oviposition success is influenced by aphid behavior that is related to aphid size and expressed through instarspecific escape and defense reactions. Being smaller and less able to defend themselves, first and early-second instars of pea aphid are more susceptible to successful parasitism than third and fourth instars, in that order. Observed patterns of preference by Aphelinus females for particular aphid species and instars reflect the outcome of behavioral interactions between the hosts and the parasites, rather than preference in the strict sense. © 1990 Plenum Publishing Corporation.
引用
收藏
页码:501 / 514
页数:14
相关论文
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