Field Interaction between Tuta absoluta parasitoids of different guilds in tomato crops of Argentina

SAVINO, V.; LUNA, M.G.; COVIELLA, C.E.; SÁNCHEZ, N.E.

Niafara Falls, Canada

Congreso; Biological Control in the Americas, Past, Present & Future.; 2010

Internacional Organization for Biological Control (IOBC)

For the endoparasitoid Pseudoapanteles dignus and the ectoparasitoid Dineulophus phtorimaeae, we evaluated: a) total and average parasitism rate per leaf, for each species, and b) variation of the mean proportion of parasitism as occurring either alone or together on a single leaf, along a gradient of increasing field host densities. We found: a) higher total ectoparasitoid parasitism rates than for P. dignus, and b) higher proportion of leaves with the endoparasitoid for a host density of 1, but a tendency to an increased parasitism by the ectoparasitoid either alone or accompanied by P. dignus in the same leaf, as host density increases.