Fig. 4. Results from the first field-trapping experiment, 23-28 April. In each
treatment, 5 µg of an electrophysiologically active compound was added to
the pheromone blend of Eriocrania semipurpurella [reference blend
(Ref.) 50 µg of (R,Z)-6-nonen-2-ol and 50 µg of
(S,Z)-6-nonen-2-ol]. The graph shows the number of males of the two
species E. semipurpurella and E. cicatricella caught per
trap. Values are means + S.E.M. (N=15). *Significantly
different from the reference blend (Ref.) (P<0.001)
(Mann—Whitney U-test); NS, no significant difference from the
reference blend.
