Severe attack by a leaf spot disease was found on seedlings of Quercus acutissimain Jeungpyeong, Korea in 2017. Based on the morphological characteristics of the fungus, it was identified as a...doi:10.1007/s13314-018-0299-0Lee, Dong-Hyeon...
The species is morphologically distinct from other Tubakia species and causes a progressive necrotic leaf blight that differs from leafspot symptoms caused by other species. Phylogenetic analysis of ITS sequences supports a monophyletic T. koreana clade independent of other Tubakia species....
Tubakia dryina , the causal agent of red oak ( Quercus rubra ) leaf spot, produced the phytotoxins isosclerone, 3-hydroxyisosclerone, 6-hydroxyisosclerone and 6-hydroxymellein in liquid culture. All toxins caused large necrosis when placed on leaves of red oak. Necrosis was also caused ...
Leaf tissue colonized by the fungus became water soaked, and later turned brown and necrotic. Key words: Actinopelte, leaf spot, oak, pycnothyrium.doi:10.1139/b91-236G. P. MunkvoldD. NeelyCanadian Journal of BotanyMunkvold, G. P. & Neely, D. (1991) Development of Tubakia dryina ...