Dinamica populacional e incidência de moscas-das-frutas e parasitoides em cultivares de pessegueiros (Prunus Persica L. Batsch) no município de presidente prudente-sp

摘要

The objectives of this research were evaluate the population dynamic and diversity of fruit flies (Diptera: Tephritoidea) on peach cultivars Tropical, Talisma, Aurora 2, Aurora 1, Dourado 2 and Do?ura 2, under the rootstocks 'Okinawa' and Umê, in Presidente Prudente, S?o Paulo, Brazil. The dynamic population of fruit flies was correlated with temperature and precipitation. The fruit fly infestation was correlated with chemical characteristics of fruits. During July 2004 to December 2006, the fruit fly population was monitored weekly using McPhail traps. The natural infestation was estimated from 30 fruits of each cultivar collected per year. The experiment was conducted under randomized design with five replications. Ceratitis capitata was dominant on peach cultivars for the both rootstocks. No significant correlations were detected between the fruit fly densities and the temperature and precipitation, and the variables soluble solids and titratable acidity. Among peach cultivars, Aurora 2 presented the highest infestation by C. capitata, reaching 22% and 23%, in 2004 and 2006, respectively. Neosilba spp. (Lonchaeidae) was also recovered from peaches. Doryctobracon areolatus (Braconidae), Tetrastichus giffardianus (Eulophidae) and Pachycrepoideus vindemmiae (Pteromalidae) were recovered from Tephritidae pulparium.