In mildew caused capsium is the main mechanism of mildew.There are more factors to produce mildew.mainly temperature and humidity of the environment.Through the determination,the mildew grows slowly in natural room temperature before the next March.From April onwards growth has accelerated.And using composite film packaging,filled natural,natural conditions are more easily to seal technology promtion.In addition,in the conditions of composite film packaging,loaded with compaction,natural sealed measured the mildew production in different temperatures,find out that there is nearly no mildew in the condition of 5 ℃ and 10 ℃.