Pomaceous

The disease occurs throughout the United States and Canada in practically every section where pomaceus fruits are grown.

The brown rots of pomaceous and drupaceous fruits are due to fungi, at least one of which was first described by Persoon in 1796 as Torula fructigena.

Pomaceous and stone fruits can be degraded by a number of pathogenic species including Monilia laxa, M. fructigena and Rhizopus stolonifer.

Cedar rust is characteristic of the “double host” rusts and needs two hosts, namely apple or other pomaceous plants and red cedar before it can complete its life cycle.

This bacterium^([Erwinia amylovora]) commonly affects most pomaceous trees and shrubs.

Infected foliage on the pomaceous, alternate hosts apppears during the summer or fall and is characterized by spots or large areas of yellow-orange discoloration and varying degrees of deformation.