Abstract:  The article mainly studied the fruit serosa disease, the major disease to Dongzao Jujube dring the fruit storage. The isolating, cultivating, purifying, examinating and microscopic examinates of the pathogen have been assayed. The fact that Alternaria Nee ex Wallr is the pathogen of fruit serosa disease of Dongzao Jujube has been assayed and identified. Moreover, the effects of temperature, pressure and ozone on Alternaria Nee ex Wallr have also been studied, and confirmed that 100 mg/m3 ozone at 20.3 kPa and-0.5 ℃ can refrain spores of Alternaria Nee ex Wallr from fast breeding.

Key words: Dongzao Jujube, thick liquid disease fruit, low temperature, hypobaric, ozone