In conclusion, application of either BTH or MeJA on maize in
subtropical field conditions did not increase parasitism of S. frugiperda
larvae. However, based on previous findings from laboratory
assays (Rostás and Turlings, 2008), as well as on the
experiment with the potted plants it appears that under more
moderate environmental conditions and with early treatment of
the plants, BTH treatment could lead to enhanced resistance
against pathogens. Here it is shown that BTH application has no
negative effect on parasitism of the primary maize pest in Mexico,
S. frugiperda and is therefore compatible with biological control in
the study system. If under more moderate conditions elicitors can
even be used to enhance the attraction of key larval parasitoids remains
to be determined.