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were conducted to assess the host suitability of nymphal ;nstars of .
Trialeurodes vaporariorum Westwood when attacked by Encarsia inaron (Walker). Rate of parasitism, parasitoid mortality, development time and progeny longevity were recorded. E. inaron parasitized all instars; however second larval instar had the highest percentage of parasitism(44%) while the pupal instar the lowest (14%). Second instar has shown the lowest proportion of parasitoid mortality (10.4%).Parasitoid development was longest when parasitism occured in the first instar (18.71 days). The longevity of female progeny that emerged from hosts attacked in the second instar was significantly greater (6.7 days) than those from
prepupal stages (3.54 days). When E. inaron parasitizes 1 st or 2nd instars, the
parasitoid can be referred to as a kinobiont because, after parasitization, the host
continues to feed, grow and develop. However, when E. inaron parasitizes 3rd or 4th instar larvae, they stop development (idiobiont).