Podosphaera perseae-americanae, a new powdery mildew species on Persea americana (avocado) from Indonesia

An asexual stage of powdery mildew was found on Persea americana in West Java and North Sumatera, Indonesia. Based on phylogenetic analyses as well as morphological investigations, a new species, Podosphaera perseae-americanae, is proposed for this fungus including detailed descriptions and illustrations of morphology. Also its generic affinity and phylogeny are discussed.