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山楂日烧病是指发生在其幼果阳面的一种(机械)灼伤,通常出现在落花后的20～30天内(6月中旬左右)。这个时期正值果实第一次速长期,果实细胞组织非常幼嫩,此时骤遇烈日高温,经2～3小时暴晒,便可使幼果阳面组织灼伤、坏死、褐变。轻者至果实成熟前伤层翘裂自崩,有的畸形发展;重者3天左右果柄开始变黄,造成幼果脱落。1988和1989年我县山楂树严重遭受日烧病危害,损
Hawthorn Day Burns refers to a (mechanical) burns that occur on the surface of its young fruit, often occurring within 20-30 days (about mid-June) after the flower has fallen. This period coincided with the fruit of the first fast long-term, fruit tissue is very young, suddenly hot sun at this time, after 2 to 3 hours of exposure, you can make the young fruit sun tissue burns, necrosis, browning. The light to the fruit before the injury of the lesion split since the collapse, and some deformities; severe cases about 3 days stalk began to turn yellow, resulting in young fruit off. In 1988 and 1989, the hawthorn tree in our county suffered serious damage from burning disease