Adult pales weevils react to light and temperature cues regarding their movements in pine plantations. They remain at the base of their host trees during the day and move onto the trees after dark. A drop in light intensity to 2 fc triggers this response. Ambient temperature below 10°C curtails their movements. Weevils placed on the ground are photophobic at temperatures below 20°C and photophobic and thermophobic above 35°C. Orientation is erratic above 40°C and heat stupor occurs in a few minutes.
Corneil, Jeffrey A. and Wilson, Louis F.
"Some Light and Temperature Effects on the Behavior of the Adult Pales Weevil, Hylobius Pales (Coleoptera: Curculionidae),"
The Great Lakes Entomologist: Vol. 17
, Article 8.
Available at: http://scholar.valpo.edu/tgle/vol17/iss4/8