Fig. 4.

Host recognition rate in contact bioassays of female H. sylvanidis exposed to freshly killed larvae of a) T. confusum (T. con) and b) O. surinamensis (O. sur) treated as follows (N = 30 per species and stimulus, 100% ≙ 30 successful host recognition events per stimulus, max. observation time = 300 s): (i) untreated, (ii) extracted with n-hexane, (iii) extracted with n-hexane and treated with crude larval extract of O. surinamensis (½ LE), (iv) extracted with n-hexane and treated with crude larval extract of T. confusum (½ LE). Host recognition rate was analyzed by the test for equality of proportion (T. confusum) or Fisher’s exact test (O. surinamensis) followed by pairwise comparison of proportions with Bonferroni-Holm correction. Different letters indicate significant differences at P < 0.05