Critical lethal temperature (LT 50 ) of apricot pink flower buds and full blooming flower in six different ecologic regions was determined with electrolyte leakage and logistic equation.

• 用电导法配以Logistic方程，测定了6个不同生态地区杏（apricot）品种花蕾和盛开花朵的半致死温度（LT50）。