Influence of temperature on the development of Gonipterus scutellatus Gyllenhal, 1833 (Coleoptera, Curculionidae) in Eucalyptus viminalis Labill in Curitiba, State of Paraná.
A study of the development of Gonipterus scutellatus Gyllenhal, 1833 was undertaken in the laboratory, using Eucalyptus viminalis as a host, at four different temperatures (18, 20, 22 and 24°C), R.H. 70±10% with 12 h of photophase. The influence of temperature was demonstrated and the lower thresholds were 9.16°C for eggs, 8.08°C for larvae and 8.60°C for prepupae and pupae. Similarly, the thermic constants were, respectively, 109.32; 271.36 and 518.04°D. The temperature requirements suggest the existence of two generations per year, a number which agrees with field observation.