Cotesia vanessae

Parasitoid success of C. vanessae was higher on T. ni than on C. chalcites, yet parasitoid cocoon mortality was lower on T. ni than on C. chalcites (F 1,18 = 4.703, P = 0.044; U = 13,874.00, P <0.001, respectively; Fig. 3). Host mortality was lower on parasitised T. ni than on parasitised C. chalcites (F 1,18 = 7.714, P = 0.012), and host success was similar between both parasitised host species (U = 48.00, P = 0.912; Fig. 3). Host mortality of parasitised T. ni and C. chalcites (4.10 ± 0.55 and 5.90 ± 0.35 dead larvae, respectively) by C. vanessae was higher (F 1,18 = 12.37, P = 0.002; F 1,18 = 54.76, P <0.001, respectively) than on nonparasitised hosts (1.80 ± 0.36 and 2.20 ± 0.36, respectively). The brood size of C. vanessae was higher (U = 4720.50, P <0.001) on T. ni than on C. chalcites (52.11 ± 2.11 and 30.24 ± 1.3 parasitoids, respectively).

The multinomial logistic regression indicated that the interaction of host success (Wald = 0.003; df = 1; P = 0.959) and host mortality (Wald = 3.28; df = 1; P = 0.070) with parasitoid success was similar between the parasitised larvae of host species.

The development times from oviposition to cocoon formation and oviposition to adult emergence of C. vanessae were shorter on T. ni than those on C. chalcites (U = 16 184.00, P <0.001; U = 4411.00, P <0.001, respectively; Fig. 2). However, the time from cocoon formation to adult emergence of the parasitoid did not differ significantly between either host species. (U = 9833.00, P = 0.573; Fig. 2).