Lophodermella conjuncta–needle cast of pines - Lophodermella conjuncta
Symptoms / species
Impact / measures
Discoloration of needles mostly confined to the abaxial half of the needle, the other half remaining green for a while; in mountain pines usually affecting rather older needles and commonly only one needle of each pair, the other remaining healthy; discolored needle parts with indistinct darker (slightly reddish) sectors, bands or spots with some resin flow, later on turning pale and yellow (at first sector-wise, then entirely) and finally greyish-white; in the pale sectors in groups fine, short, narrow and blackish slits (fruiting bodies: hand lens!); possibilities of errors: Swedish needle cast, with longer, more prominent and darker fruiting bodies.
Affected tree species
Usually on mountain pines (Pinus mugo>/em>), on urban sites as well as in forests, more recently in medium altitudes of the Alps (Lower Austria, Tyrol) increasing in conspicuousness, but up to now rather low impact.
Curative measures Not necessary
Lophodermella conjuncta: Mountain pine showing needle cast
Lophodermella conjuncta: needle cast
Lophodermella conjuncta: needles with typical discoloration of the abaxial part
Lophodermella conjuncta: yellow-grey sector with fruiting bodies
Lophodermella conjuncta: fruiting body in cross section