Thripinema khrustalevi (Chizov et al.) isolate Chile, a parasite of Frankliniella australis (Morgan), was collected from Cestrum parqui (L’Herit.) in the Aconcogua Valley of central Chile. Percent infection of males and females of F. australis by T. khrustalevi in the flowers of C. parqui was estimated biweekly for two years at three locations, including the La Campana National Park. Males were less infected than females. Numbers of F. australis adults and larvae in the flowers of C. parqui were greatest in the winter and early spring when parasitism of the adult females was low. Populations declined in late spring when parasitism was high. Parasitism remained high through the summer and fall, and populations of thrips remained very low. Highest parasitism of the females and males of F. australis was 84 and 60%, respectively.
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