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.

The black stem borer is an introduced species from eastern Asia that first was detected in NY in greenhouse-grown grape stems in 1932, but has since been documented in most parts of the US. A member of the group known as ...

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, ...

Brown rot occurs on all stone fruit worldwide and afflicts blossoms, twigs, and fruit, both pre- and post-harvest. Several closely-related fungal species, collectively known as Monilinia spp. cause the disease. In stone ...

Apple chlorotic leaf spot virus (ACLSV) infects pome and stone fruits. It can elicit diverse symptoms although, in most cultivars the virus is latent, which means that infected trees do not manifest observable symptoms. ...

Blueberry shock disease, caused by Blueberry shock virus (BlShV), threatens profitable and sustainable blueberry (Vaccinium spp.) production. The disease has recently emerged in New York, having been confirmed in 2011. ...

Scorch is a viral disease that is a considerable threat to New York blueberry (Vaccinium spp.) production. Caused by Blueberry scorch virus (BlScV), the disease is spread through clonal propagation of infected plant ...

Apple stem pitting virus (ASPV) is a latent virus of pome fruits with worldwide distribution. In addition to apple, ASPV can affect pear and quince. Similarly to other latent viruses of pome fruits, infections with ASPV ...

Grapevine red blotch disease (GRBD) is a recently recognized viral disease. It was first described on Vitis vinifera cv. Cabernet Sauvignon at the University of California Oakville Research Field Station in 2008, but the ...