Daily Behavior of Adult Coccinella septempunctata brucki (Coleoptera, Coccinellidae)

Daily behavior of adult Coccinella septempunctata brucki MULSANT was surveyed in spring alfalfa fields and alfalfa planted pots. At over 10℃, adults were active only in the daytime when the luminosity was more than 0.2 MJ/m^2/0.5 hr, and wind velocity was less than 10 m/s. Predation, oviposition and mating were observed constantly in the daytime. After sunset, the insects remained at the base of the alfalfa plants. Density of the aphid population also affected the intensity of their activities : the lower the density, the more active they were.