Diseases of rose ( Rosa sp. ) in Arizona Powdery mildew Many foliar diseases common to rose in other areas are not problematic in Arizona because of the dry climate and adaptability of roses to th

By Jack_Luca | 2 Comments | Rating: 1 Unless you have purchased a disease resistant variety of roses, roses are susceptible to diseases such as powdery mildew. © Copyright 2008 - 2012 by Hinz

Mildew is a fungal disease, which affects roses. The first signs of powdery mildew appear on young leaves, which hold their color but begin to crinkle. Then small patches of mold appear that

Powdery white mildew is caused by the fungus, Sphaerotheca pannosa and that’s the mouthful you can drop at any garden party from now on to impress the heck out of your neighbors. This parasite lives

How to recognise it Patches of a powdery, off-white substance appear on the upper (and sometimes lower) surfaces of leaves and can merge to cover the entire leaf surface. Similar fungal growth may al