论文部分内容阅读
观察葡萄病毒病病状的适宜时期因病毒种类不同而异。扇叶病(GFV)是5—6月,卷叶病(LR)及栓皮病(CB)是9—10月,茎干纹孔病(SP)是在落叶后。然而到9—10份扇叶病的叶片斑点虽然变得不甚明显,但仍可见到畸形叶和果实上的症状。因此9—10月份是观察葡萄病毒病的最好时期。作者于1982年9—10月间访问了欧州的瑞士、西德、法国及美国西海岸的华盛顿、加州,考察了葡萄的各种病毒病症状。
The appropriate period for observing the symptoms of a grapevirus disease varies according to the type of virus. Leaf rot disease (GFV) was from May to June, leaf curl (LR) and cork skin disease (CB) from September to October, and stem stem pity (SP) was after deciduous leaf. However, to 9-10 leaf blade leaf spot becomes less obvious, but still can see the deformed leaf and fruit symptoms. Therefore, September-October is the best time to observe grapevine disease. The author visited the European countries of Switzerland, West Germany, France and Washington, D.C. on the west coast of the United States from September to October of 1982 to examine the symptoms of various virus diseases in grapes.