control methods


Discoloration of Vascular Tissue
  Most deciduous trees and many shrubs are susceptible to a disease called Verticillium wilt. Conifers do not appear to be susceptible.   Symptoms Early indications that a tree has Verticillium wilt include heavy seed production, leaves that are smaller than normal, and the browning of the margins of leaves. […]

Verticillium Wilt of Woody Ornamental’s


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


Forsythia Diseases Gall   Symptoms Knobby galls from along forsythia branches.   Management Prune infected branches. Disinfect the pruning shears thoroughly after use.     Twig Blight   Symptoms The ends of lower branches, especially those near the ground, die. Black nodules of fungal tissue are found inside the stems […]

Forsythia 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