Needlecast diseases of evergreens are caused by several fungi. We have much to learn about when these fungi attack a tree, how long the fungus must be in the tree before needles are shed, when is the
The fungus Nectria invades wood damaged by freezing, hail, animals and insects. Nectria fruiting on a twigMost hardwoods with such injuries are susceptible to attack. Slightly sunken areas (cankers) develop around wound
Informational table showing disease name, symptoms, pathogen/cause, and management of Mountain Laurel diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Mountain Ash diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Maple diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Lilac diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Leucothoe diseases.
Junipers (Juniperus sp.), also known as red cedars are susceptible to a disease that results in the death of twig tips.
Informational table showing disease name, symptoms, pathogen/cause, and management of Juniper diseases.
A tree presents a hazard if a defective part poses a high risk, upon its structural failure, to cause personal injury or property damage.
Insect Vectored Pathogens On Woody Ornamentals
Some devastating pathogens in woody ornamentals are moved from plant to plant or vectored by insects.
Informational table showing disease name, symptoms, pathogen/cause, and management of Horsechestnut diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Honeysuckle diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Holly diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Hickory diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Hemlock diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Hawthorn diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Hackberry diseases.
Informational table showing disease name, symptoms, pathogen/cause, and management of Forsythia diseases.
Fire blight is a disease caused by the bacterium Erwinia amylovora. This bacterium can attack more than 75 species of trees and shrubs including apple, pear, quince, mountain ash, crabapple, hawthorn,
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