mildew


Rose Shrub Diseases - Virus
Rose Diseases Anthracnose   Symptoms Dark purple to black spots are bordered by a narrow, dull-brown band. Centers of spots turn gray and fall out. Spots similar to leaf spots form on canes.   Management ZeroTol Fungicide is a ready to use spray that provides immediate control for anthracnose on […]

Rose Diseases: Kockouts & Double Knockout Roses


Maple Tree Diseases   Anthracnose   Symptoms Norway maple: narrrow, purple to brown streaks occur along the leaf veins. Sugar maple: large, irregular, brown or red-brown areas develop along and between the veins similar to injury due to drought and heat stress. Small, brown fruiting structures of the fungus are […]

Maple Tree Diseases


Lilac Shrub Diseases   Ascochyta Blight   Symptoms In the Spring, the current year’s shoots and flower stalks are girdled, wilted, and brown. The base of the dead area is tan to gray and shriveled. In wet weather, dark gray pimple-like fungal fruiting structures dot the dead tissue. In Summer […]

Lilac Shrub Diseases



          Botryosphaeria Canker   Symptoms Rough, sunken, dark-brown areas form around wounds or natural openings in the bark. The wood of a recently killed branch is lighter brown than the pith. Dead bark falls off the cankered area. Leaves on affected branches wilt as affected branches […]

Azalea & Rhododendron Shrub Diseases