论文部分内容阅读
苹果根部病害的发生及防治要点一、根部病害的种类在我省常年发生并造成不同程度为害的苹果根部病害有：园斑根腐病、紫纹羽病、白纹羽病、白绢病等。二、根部病害的发生与为害１园斑根腐病我省各地普遍发生，部份果园受害较重。根系被害先从须根开始，病根变褐枯死，然...
The occurrence of apple root disease and prevention and control points First, the type of root disease occurs in our province perennial and cause different degrees of damage to apple root diseases are: patch root rot, purple feather disease, white feather disease, sclerotlum and other diseases . Second, the occurrence of root diseases and damage 1 Patchwork root rot occurs throughout the province, some orchards suffer more. The roots of the first victims from the fibrous root, diseased roots brown dead, then ...