The thermal requirements of the apple leafroller Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) were estimated at four constant temperatures (14, 18, 22 e 26ºC) in laboratory (70±10% R.H. and 14:10L:D). Artificial diet was fed to the insects. The low threshold temperature and thermal requirement for eggs, larvae, pupae and biological cycle (egg to adult) were 7,2 e 140; 7,1 e 410; 6,4 e 183 e 6,8ºC and 745 GD, respectively. It was estimated that this species complete three to four annual generations. In the three regions, one generation occurs during the winter.
Insecta; ecology; behaviour; threshold temperature; apple leafroller
