Based on the quadratic orthogonal rational combinatorial regression design an experiment was carried out in laboratory to examine the effect of temperature and relative humidity on the survival of the overwintering Asian coccinellid during the winter of 1992～1993. Adults of the ladybird were collected from outdoor in Gongzhuling in December, 1992 and exposed under nine combinations of different low temperature and relative humidity. after 70, 100, 130, 160, 190, and 220 days, the survival rate and survival ...