caa a22 4500 46578903X CHVBK 20180323112018.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF01052014 doi (NATIONALLICENCE)springer-10.1007/BF01052014 Instar-specific defense of the pea aphid, Acyrthosiphon pisum [Elektronische Daten] Influence on oviposition success of the parasite Aphelinus asychis (Hymenoptera: Aphelmidae) [D. Gerling, B. Roitberg, M. Mackauer] The parasite Aphelinus asychisWalker (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. Plenum Publishing Corporation, 1990 Acyrthosiphon pisum nationallicence Aphelinus asychis nationallicence Aphelinidae nationallicence behavior nationallicence defense reactions nationallicence host selection nationallicence oviposition nationallicence parasite nationallicence pea aphid nationallicence Gerling D. The George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978, Ramat Aviv, Israel aut Roitberg B. Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, B.C., Canada aut Mackauer M. Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, B.C., Canada aut Journal of Insect Behavior Kluwer Academic Publishers-Plenum Publishers 3/4(1990-07-01), 501-514 0892-7553 3:4<501 1990 3 10905 https://doi.org/10.1007/BF01052014 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01052014 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gerling D. The George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978, Ramat Aviv, Israel aut NATIONALLICENCE 700 1- Roitberg B. Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, B.C., Canada aut NATIONALLICENCE 700 1- Mackauer M. Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, V5A 1S6, Burnaby, B.C., Canada aut NATIONALLICENCE 773 0- Journal of Insect Behavior Kluwer Academic Publishers-Plenum Publishers 3/4(1990-07-01), 501-514 0892-7553 3:4<501 1990 3 10905 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer