Method for preventing black spot disease of bagged apples

The invention discloses a method for preventing black spot disease of bagged apples. The method includes the following steps: (a) bagging immediately after spraying 8000-fold DuPont fusion, and (b) spraying composition agent composed of 1500-fold 75% of Water Dispersibie Granuai, 8000-fold DuPont fusion and 800-fold 80% of Penncozeb for three times before releasing the bag. As an improvement, the fruit bag in the step (a) is changed by a double layer paper bag and two air holes at the bag bottom corners are softened when the apples are bagged. The method is based on the characteristics of the black spot disease of bagged apples and the actual problems in practice. Practice proves that the method for preventing black spot disease of bagged apples is safe, long-lasting and efficient with the use of fruit bags.