论文部分内容阅读
葡萄病毒病种类及症状:(A)意大利的主要葡萄病毒病:扇叶病,黄色花叶病、叶脉失绿和卷叶病,曾统称为葡萄退化综合症。根据至今所掌握的情况,前三种属于同一病毒的不同株系所致。现将这三种病单独描述,本文将这三种病统列为扇叶形病的范围。1.扇叶病(Arricciamento)该病还被称为“畸形叶”、“花叶”和“真花叶”病等。症状主要是叶畸形,叶缘锯齿突出而不规则。裂刻比正常叶深,有时深裂可达叶脉。叶缘两侧不对称,叶柄洼开角大。叶脉间距缩短,似折叠起的扇子。叶上有不同形状的浅绿色斑点,枝条畸形,节
Grapevirus types and symptoms: (A) The major grapevine diseases in Italy are: Fanatics, Yellow Mosaic, Vein Green and Leaf Roll, which are collectively referred to as Grape Degeneration Syndrome. According to the situation so far, the first three belong to different strains of the same virus. Now these three kinds of diseases are described separately, this article will be classified as three kinds of disease leaffoil range. 1. Arricciamento The disease is also known as “deformed leaf”, “mosaic” and “true mosaic” disease. Symptoms are mainly leaf deformities, leaf serrations prominent and irregular. Split deeper than the normal leaf, and sometimes deep up to the veins. Leaf margin asymmetric on both sides, petiole depression angle. Veins shorten the pitch, like folding fans. Leaves have different shapes of light green spots, branches deformity, section