OCCURENCE AND INFESTATION INDEXES OF Anastrepha spp. (DIP., TEPHIRITIDAE) IN Pouteria gardneriana RADLK AND Pouteria ramjflora (MART.) RADLK. (SAPOTACEAE) IN “CERRADOS” OF THE STATE OF GOIÁS, BRAZIL

Abstract

The genus Pouteria is the most common natural fruit tree in Goiás (Brazil) savanna and it is spread over all tropical and subtropical regions. Pouteria ramiflora is the most common and P. gardneriana often occurs in wet soil, always gathered between “cerrado” and “veredas” (another typical vegetation). Among 25 sampled towns, nine registered both Pouteria species, which fruits are very susceptible to the fruit flies. The majority of flies belonged to Anastrepha genus (99.82%) and only some to Ceratitis capitata (0.18%). From P. gardneriana it was collected Anastrepha bistrigata, A. fraterculus, A. Ieptozona, A. serpentina, A. zenildae A. zernyi and C. capitata. From P. ramiflora it was obtained A. fraterculus, A. leptozona, A. serpentina and A. zernyi. From larvae/puparia of Anastrepha, parasitoids were reared belonging to family Braconidae (97.70%) and Eucoilidae (2.30%). Doryctobracon areolatus and Doryctobracon sp. (probably new species) are the most common parasitoid species sampled. The fruit fly infestation indexes were 85.92 and 196.31 puparia/kg of fruit in P. gardneriana and P. ramiflora, respectively. So, these two Pouteria species may be considered natural fruit fly repositories in Goiás State (Brazil), mainly for Anastrepha. This is the first report of P. gardneriana and P. ramiflora as host of fruit flies. It is also the first record of A. leptozona, A. serpentina, A. zenildae and A. zernyi in the state of Goiás as well as the first record of braconid parasitoids obtained from puparia of Anastrepha in P. gardneriana and P. ramiflora.

KEY-WORDS: Insecta; Sapotaceae; host plants; fruit flies; parasitoids.