Asiatic brown rot, caused by the fungus Monilia polystroma, is native to Japan. Unlike our native brown rot which infects primarily stone fruit, Asiatic brown rot readily infects apple and pear. Asiatic brown rot has been ...

Life history and biology of the Velvet Longhorned Beetle, an invasive species.

Cedar apple rust affects the foliage and fruit of apples (Malus domestica) and other members of the family Rosaceae (e.g. crabapple). This fact sheet describes the causal agent, the fungal pathogen, Gymnosporangium ...

Apple scab, one of the most devastating fungal diseases of apple, occurs worldwide, wherever apples are grown. The fungal pathogen, Venturia inaequalis, can also infect crabapple, hawthorn, mountain-ash, firethorn, and loquat.

Fire blight, caused by the bacterium Erwinia amylovora, is one of the most destructive diseases in apple and pear production. Fire blight can infect other members of the rose family including quince, juneberry, hawthorne, ...

The spotted lanternfly is a planthopper native to China and Southeastern Asia. Discovered in Pennsylvania in 2014, the spotted lanternfly presents a threat throughout much of the United States. While its list of hosts is ...

Powdery mildew occurs in all apple-producing regions worldwide, especially where warm, humid climate conditions prevail. Young expanding plant tissues are particularly susceptible to the disease. Therefore, powdery mildew ...

Variegated golden tortrix is a leafroller native to Europe and Asia. Also known as apple leafroller or brown oak tortrix, variegated golden tortrix is able to feed on the buds, foliage, flowers, and fruit of many plants. ...

Originally from Australia, the light brown apple moth can now be found in New Zealand, New Caledonia, Hawaii, the British Isles, and most recently, California. The light brown apple moth is a greater threat than many other ...

The summer fruit tortrix moth is an insect pest native to Europe and Asia. It primarily feeds on apples, cherries, and pears, though it has over 50 other plant hosts. While summer fruit tortrix has yet to be discovered in ...