Fig. 2. Mean (± s.e.m.) arrestment response of T. basalis females allowed to oviposit on a host egg-mass in the presence of either host male (m_ko; male kairomone) or female residues (f_ko), and then tested according to different conditions (e.g. oviposition on male traces and tested on male traces: m_ko_m; see text for a detailed explanation. b, blank - uncontaminated area). Different letters above the bars indicate significantly different means (ANOVA, Tukey's HSD).