disease


Fruiting Bodies on Cone Scales
Sphaeropsis (Diplodia) Tip Blight of Pine Trees Austrian, Scots, Ponderosa, Mugho, Red and other 2 and 3 needled Pines are susceptible to the killing of shoot tips and branches cause by the fungus Sphaeropsis sapinea Symptoms include the browning of needles on new shoots as the needles grow from the […]

Sphaeropsis (Diplodia) Tip Blight of Pine Trees


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


 Viola Perennial Shrub Diseases:   Aster Yellows: Symptoms – Leaves are yellowed and narrow rather than oval. An abnormally high number of shoots form. Management – Remove infected plants. Control leafhoppers.   Bacterial Infection: Symptoms – An abnormally high number of shoots form Management – Remove infected plants. Black Root Rot: Symptoms – Plants are yellowed, stunted and die. Management – Try […]

Viola Perennial Shrub Diseases – Symptoms & Control



Perennial Shrub Diseases   Time and Time again it seems that we, as homeowners, are always fighting a never ending battle when it comes to disease and fungus on our Perennial Shrubs.  Shrub diseases can have a major impact on the entire landscape and if not properly treated can lead […]

Perennial Shrub Diseases


Evergreen Needlecast Diseases are caused by several fungi. Needles infected with fungi generally fall several months after the actual period of infection. The period of greatestinfection for most needlecast fungi is during the late Spring and early Summer months. Symptoms, the visible indication that the needle is diseased, do not […]

Evergreen Needlecast 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



 Holly Diseases   Leaf Scorch   Symptoms Circular to irregular, tan spots appear in early Spring or Summer. Tiny, black fungal fruiting structures pepper the spot surface as a result of attack by the secondary fungus.   Management No control is recommended   Nematodes   Symptoms Yellowing, stunting, and twig […]

Holly Diseases


Fire Blight is a bacterium that can attack more than 75 species of trees and shrubs including apple, pear, quince, mountain ash, crabapple, hawthorn, cotoneaster, and serviceberry. The bacterium over winters on infected plants in darkened, slightly sunken cankers. In the spring the bacteria are dispersed by insects, rain, wind, […]

Fire Blight


 Elm Tree Diseases   Black Leaf Spot   Symptoms Small, black, slightly raised, rough spots form on leaves. Leaves yellow and fall prematurely   Management Apply PureSpray Green. An Organic Spray that is very effective in controlling Leaf Spot. BUY NOW   Botryodiplodia Canker   Symptoms Cankers form on twigs […]

Elm Tree Diseases



Root Death is an important cause of poor plant health in woody plants. When roots are killed, the plant is not able to take up sufficient water or nutrients to support the development of branches, leaves, flowers, or fruit. Usually, the above-ground symptoms appear long after root death has been […]

Diagnosing Root Death in Woody Ornamentals


Blue and Norway Spruces are susceptible to a branch killing disease called Cytospora Canker. Cankers are dead, sunken areas of bark and underlying wood that form on the lower branches, eventually making its way towards the top of the tree. Resin flows out of the cankers and may drip down […]

Cytospora on Spruce


Cherry Tree Disease – Black Knot Black Knot causes the formation of dark brown to black, long, swollen galls or knots on the branches of most types of cultivated plums, prunes and cherries. The disease is very destructive, killing twigs and limbs, and occasionally whole trees. Although there are no […]

Black Knot – Cherry Tree Disease



Ash, Oak, Sycamore, Maple, Dogwood, and many other deciduous hardwoods are susceptible to a leaf disease called anthracnose   Symptoms Include: Small dead spots on leaves Dead leaf margins and tips Brown, dead areas along leaf veins Large dead blotches between leaf veins Premature defoliation Twig death Bud killing early […]

Anthracnose on Shade Trees