TY - JOUR A1 - Heisswolf, Annette A1 - Gabler, Dirk A1 - Obermaier, Elisabeth A1 - Müller, Caroline T1 - Olfactory versus contact cues in host plant recognition of a monophagous chrysomelid beetle N2 - The importance of olfactory versus contact cues for host plant recognition was investigated in the tortoise beetle Cassida canaliculata Laich. (Coleoptera: Chrysomelidae), which is strictly monophagous on meadow sage. The reaction of adult beetles to olfactory and contact host cues was tested using three bioassays (locomotion compensator, six-chamber-olfactometer, stem arena') to account for different behavioral contexts. Bioassay-guided fractionation of plant extracts was elaborated to characterize the nature of contact stimuli. The beetles were only slightly attracted to odors from small amounts of leaf material. However, when contact cues were provided additionally, the beetles showed strong preferences for samples of their host plant over controls. Bioassay-guided fractionation led to isolation of at least two non-polar contact stimuli acting in concert that are sufficient for host plant identification in C. canaliculata. KW - Insekt KW - Verhalten KW - Locomotion compensator KW - olfactometer KW - bioassay-guided fractionation KW - stem arena KW - host recognition Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-49475 ER -