Abstract

BOTTON, Marcos; NAKANO, Octávio  and  KOVALESKI, Adalécio. Thermal requirements of Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) and estimation of the number of generations in apple growing regions in the South of Brazil. An. Soc. Entomol. Bras. [online]. 2000, vol.29, n.4, pp. 633-637. ISSN 0301-8059.  http://dx.doi.org/10.1590/S0301-80592000000400002.

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.

Keywords : Insecta; ecology; behaviour; threshold temperature; apple leafroller.