Content tagged "apple disease"

Wood Rots in Apple Trees

Apples Updated: August 22, 2011

Wood-rotting fungi cause losses over longer periods of time than most other apple diseases. Losses result mainly from breakage of branches and trunks due to...

X-Spot of Apple

Apples Updated: August 22, 2011

The names X-spot, X-rot, and Nigrospora spot have been applied to a small, circular, depressed, necrotic spot typically on the calyx end of apple fruit in...

Black Root Rot of Apple

Apples Updated: August 22, 2011

Black root rot, also called dead man's fingers or Xylaria root rot, is occasionally observed on mature apple and cherry trees. Although trees of all ages can...

Black Rot of Apple

Apples Updated: August 21, 2011

Black rot is a fungus disease that can cause serious losses in apple orchards, especially in warm, humid areas. The black rot fungus covers a wide...

White Root Rot of Apple

Apples Updated: August 21, 2011

White root rot, caused by the fungus Scytinostroma galactinum (formerly Corticium galactinum), has been known as a parasite of apple trees for many years and...

Apple Mosaic Virus

Apples Updated: August 21, 2011

Apple mosaic virus is one of the oldest known and most widespread apple viruses. The same virus can cause line pattern symptoms in plum and rose mosaic...

Armillaria Root Rot of Apple

Apples Updated: August 21, 2011

Armillaria root rot, also known as shoestring root rot, is a soilborne disease that can affect several fruit crops. However, it is most common in the eastern...

Latent Viruses in Apples

Apples Updated: August 21, 2011

A large number of latent viruses have been identified in apple. More common latent viruses include apple chlorotic leaf spot virus, apple stem pitting virus,...

Table of Apple Cultivar Susceptibility to Bitter Rot

Apples Updated: August 21, 2011

 Bitter rot is a fungus disease that causes fruit rot during the summer and the preharvest period. The bitter rot fungi are almost worldwide in distribution...

Table of Apple Cultivar Susceptibility to Quince Rust

Apples Updated: August 21, 2011

 Quince rust is a fungus disease caused by Gymnosporangium clavipes. The fungus infects fruit, but not leaves, of most apple cultivars. It infects both fruit...

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.