随着套袋苹果数量的增加,果面上发生黑点病及红点病也比较普遍。黑点病发病初期,果实萼洼周围出现针状小黑点,黑点直径逐渐扩大,有的如芝麻大,有的如绿豆大,还有的在黑点上带有一小白点。病斑只发生在果实表皮,不会引起果肉溃烂。红点病多发生在苹果摘袋后,若遇雨,多在向阳果面上形成许多针状小红点。 With the increase in the number of bagged apple, black spot disease and red dot disease on the fruit surface is also more common. Early onset of black spot disease, the acuminata fruit acuminatum appears around the black spots, black spots diameter gradually expanded, and some such as sesame large, some as mung bean, while others have a little white spots on the black spots. Lesions only occur on the epidermis of the fruit and do not cause festering fruit. Occurrence of red dot disease in the Apple bag, if the case of rain, mostly in the sun to form a lot of acne surface red dot.