Black knot. This example is not the first I spotted in the vicinity. The first black knot I saw here was at ankle level, having killed a young prunus (probably cherry) shrub.
Observed by Sandy Koi
Identified without proper mycologic investigation from web entries.
Leaf spot diseases are caused by fungi. Septoria has been implicated in Rumex Leaf Spot.
One case of an Alternataria leafspot in Australia.
An undescribed Myriangium-like entomogenous fungus on Leucaspis podocarpi scale insect infesting leaves of young Totara
Dothideomycetes is the largest and most diverse class of ascomycete fungi. It comprises 11 orders 90 families, 1300 genera and over 19,000 known species. Traditionally, most of its members were included in the loculoascomycetes, which is not part of the currently accepted classification. This indicates that several traditional morphological features in the class are not unique and DNA sequence comparisons are important to define the class.