论文部分内容阅读
1982—1985年,通过大田调查和小区试验的研究结果,小麦播种后,12月下旬显病,根据该病症状在田间的发展变化可划分为始病期、缓增期、急增期和恢复期。本病的传播主要通过病土和病株残根,传毒率相应为67.5—98%、5.5—88%;种子、蚜虫、飞虱不能传毒。自然条件下,病毒仅侵染小麦。病毒粒体直径为12—14nm,长度为100—350nm,不同于国内外文献中所已报道的其它小麦花叶病类的病毒。
From 1982 to 1985, the results of field investigation and plot experiment showed that after the sowing of wheat, the disease appeared in late December, and the development of the disease in the field could be divided into onset period, moderate growth period, rapid growth period and recovery period. The spread of the disease mainly through the soil and diseased roots, the corresponding rate of 67.5-98%, 5.5-88%; seeds, aphids, planthoppers can not poison. Under natural conditions, the virus infects only wheat. Viruses are 12-14 nm in diameter and 100-350 nm in length, which is different from other wheat mosaic virus species reported in literature both at home and abroad.