Marssonina blotch | |
---|---|
Causal agents | Diplocarpon coronaria |
Hosts | Malus spp. |
Distribution | Worldwide |
Marssonina blotch is a fungal disease of apple leaves and fruit[1] that is caused by Diplocarpon coronaria.[2]
Marssonina blotch was historically an important apple disease in Japan[1] and China.[3] In the 1990s it became an important apple disease in India,[4] and Korea.[5] Marssonina blotch was detected in Europe by the early 2000s[6] where it caused widespread disease, especially on organically managed apples.[7] In the United States Marssonina blotch was first observed as a serious disease in 2017.[8]