Occurrence of fruit flies of the genera Anastrepha and Ceratitis (Diptera: Tephritidae), and their host plant availability in Costa Rica.
Collections of wild and cultivated tropical fruits were examined for infestation by Anastrepha spp. and Ceratitis capitata. Of 440 collections (with at least 4 fruits in each) from 201 sites throughout Costa Rica, 95% of tephritids belonged to the genera Anastrepha, while 4.7% were C. capitata. Anastrepha spp. had a strong preference for host plants within the same family. A. obliqua infested 92% of the attacked mango, 87.5% of Spondias mombin and 100% of S. dulcis and S. purpurea samples, all Anacardiaceae. A. striata was recovered from 97.8% of infested guava (Psidium guajava), 97% of P. friedrichsthalianum and 100% of P. savanarum samples. A. serpentina was the dominant species on Sapotaceae plants, being recovered from 100% of all infested Manilkara achras [sapodillas] and Pouteria caimito and 98% of Chrysophyllum cainito. A. manihoti and A. pickeli were associated with cassava (45.8 and 54.2% infestation, respectively). A. chiclayae infested 100% of Passiflora quadrangularis collections. A. distincta infested species of Inga exclusively. C. capitata was the only tephritid species recovered from peaches, at infestation rates of <7%. The annual phenology of the above plants is presented with additional observations on their interactions with tephritids.