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在夏秋之际的苹果园中,常常看到果实累累的枝头上,挂着一些凸凹不平,红一块、绿一块斑斑点点的“花脸”果实。据研究,这些“花脸”苹果是由一种病毒引起的。这种病毒,长期潜伏在梨树上,如果苹果树和梨树混栽,或者靠近梨园栽种,潜藏在梨树上的这种病毒的病原体,就会悄悄地传给苹果树,患病的苹果树,树势衰弱,叶子向背面弯曲,主脉皱缩曲折,光合效能大大降低,树体营养不足,结出的果实个头小,肉质硬,品质差,没有食用价值。这种病被称为苹果锈果病或“花脸”病。
Apple orchards in the summer and autumn, often see the fruitful branches, hanging some uneven, red, green spots a little “flower face” fruit. According to research, these “painted face” apples are caused by a virus. This virus, long-term latent in the pear tree, if the apple tree and pear tree planted, or close to the pear garden, the virus hidden in the pear pathogens, it will be quietly passed to the apple tree, the sick apple Trees, weak trees, the leaves bend to the back, shrinkage twists and turns of the main vein, significantly reduced photosynthetic efficiency, lack of tree nutrition, bear fruit small head, hard meat, poor quality, no food value. This disease is known as apple rust or “painted face” disease.