Fopius arisanus and Psyttalia fletcheri are egg and larval parasitoids, respectively, of tephritid fruit flies including the melon fly, Bactrocera cucurbitae. We investigated the consequences of parasitization when eggs or larvae of melon flies were exposed to F. arisanus or P. fletcheri alone, or to both in succession. In addition, we evaluated the effect of fruit substrates on host preference...
