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感染了马铃薯纺锤型块茎类病毒(简称PSTV)的马铃薯,植株生长抑郁叶片向上竖起,叶柄角度成锐角,茎秆硬化,块茎由圆形变为长形或畸形,多呈纺锤状,其芽眼深度变浅或凸起,有时皮上有裂纹(见图1、2)。这一病害,过去俗称为“马铃薯束顶型退化病”,早在1960年,在我省马铃薯生产上栽培的“早熟白(原名Irish Cobbler)”品种中就已发现,病株减产50％以上。但当时曾误认为非传染性的“生理病态”。从长期的生产实践看到该病发生越来越普遍,减产10～50％,已成为当前马铃薯产量提高的极大
Potato infected with tuberous spindle tubervirus (PSTV), the plant leaves of the growth of depression upright, petiole angle acute, stem harden, tuber from round to long or deformity, mostly spindle-shaped, the bud Depth shallow or raised, sometimes cracked leather (see Figure 1, 2). The disease, commonly known as “potato bushy top degenerative disease”, was first discovered in 1960 in the “precocious white (formerly Irish Cobbler)” cultivars cultivated in our province by reducing plant disease by more than 50% . But at the time it was mistaken for a non-contagious “physiopathology.” From the long-term production practice to see the disease more and more common, cut 10 to 50%, has become the current potato yield increased greatly