The locomotory response of walking Trichogramma chilonis female to the contact of scales and secretions of host moth, Plutella xylostella, and elicitation of oviposition behavior were observed. In response to a contaminated Sealon film with host moth scales and secretions, a T. chilonis female exhibited a response involving walking at a reduced speed. T. chilonis female remained during a much longer period of time on a contaminated Sealon film than on a clean one. Also moth scales and/or secretions elicited the oviposition behavior of T. chilonis females.