Figure 2.

Symptoms of Lecanosticta acicola. (A) Pinus mugo in Austria displaying symptoms of both brown spot needle blight (BSNB) and Dothistroma needle blight (DNB) on the same branches. (B) Both the characteristic brown spots associated with BSNB (black arrow) and the red banding associated with DNB (white arrow) can be observed. (C)–(E) Symptoms of BSNB vary from only brown spots as observed on P. mugo (C) to distinct brown bands as observed on P. radiata (D) to irregular mosaic spots as observed on P. palustris (E). (F) Lecanosticta acicola conidiogenous cells giving rise to conidia on malt extract agar. (G) Lecanosticta acicola septate conidia with verruculose surfaces and truncate bases.