Chase, A. R.; Daughtrey, Margery
March 2010
GPN: Greenhouse Product News;Mar2010, Vol. 20 Issue 3, p16
The article offers information on various diseases that occur in hydrangeas, and the ways to control them. It states that Ascochyta leaf spot is caused by the pathogen, Ascochyta hydrangeae, and can be controlled by using pathogen-free cuttings. It mentions that Cercospora leaf spot, caused by Cercospora hydrangeae, can be controlled by avoiding overhead irrigation, and Powdery mildew, caused by Erysiphe polygonii, can be controlled by using spacing to reduce humidity around the crop.


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