California blue oak may wear silver top due to powdery mildew.

Dr. McCreary advised in the of Spring 2017, “Powdery mildew doesn’t need rainfall, but it is favored by warm conditions, high humidity and low light and it loves young, succulent foliage.

http://www.auburnjournal.com/article/6/18/18/california-blue-oak-may-wear-silver-top-due-powdery-mildew

Posted on 19 de junho de 2018, 10:18 AM by biohexx1