矮腥在太平洋沿岸西北部地区冬小麦生产上是个久未解决的问题,由于十年前突然出现新的小种使原来抗病的商品小麦也受侵染,而变得更加复杂了。这件事发生的意义可以从蒙他拿州东部,爱达荷州南部及犹太州北部等局部地区相继发生矮腥而看出来。矮腥伸展到华盛顿东部及爱达荷相邻地区是 Dwarfing is a long-standing problem in the production of winter wheat in the north-western Pacific Ocean and has been compounded by the sudden appearance of new races a decade ago, which have also infected previously resistant wheat. The significance of this incident can be seen in parts of the east of Montana, parts of southern Idaho and northern Jewish state. Dwarf extends to the eastern part of Washington and adjacent to Idaho