Studies On Taxonomy Of The Powdery Mildews From Northeast China

The taxonomic study of powdery mildews used to basing on the morphology ofcleistothecia in the past more than one century, but in recent decades, with electron microscopetechnique and molecular biology technique is applied in the studies of powdery mildews, thetaxonomic system is being changed. The powdery mildew is common in Northeast China, butisn't reported systematically except for few papers. Among these studies, the reports of powderymildews from Jilin province are systematic.In this paper, the species of powdery mildews (Erysiphales) were treated according to thenew taxonomic system. The results showed that powdery mildews were widespread and commonin Northeast China, and more than 100 collections have been collected and studied. Themorphology of 35 species has been described, which belong to 3 genera and parasitizing on 61host plants. There were 8 new records powdery mildews of Northeast, Podosphaera astragaliJunell var. phaseoli.(Z.Y.Zhao) U.Braun &S.Takamatsu,Podosphaera minor (Hacke.) U. Braun& S.Takamatsu,Erysiphe longissima (M.Y.Li) U.Braun & S.Takamatsu, Erysiphepseudolonicerae (Homma) U.Braun & S.Takamatsu, Erysiphe berberidicola (Tai) U.Braun &S.Takamatsu,Erysiphe verniciferae (P.Henn.)U.Braun,Erysiphe pileae ((Jacz.) Bunk.ex Braun)S.Takamatsu, Erysiphe catalpea (Simon) S.Takamatasu; and 2 new records of Jilin Province,Erysiphe robiniae (Tai) U.Braun & S.Takamatsu,Sawadaia tulasnei (Fuck.) Homma.There were 11 new record host plants of China, Spiraea Vonhouttei(Briot) Zebel., Berberisthunbergii, Pilea mongolica Wedel., Acer mandshuricum Maxim., Sedum spectabile Boreau,Clematis serratifolia Rehd., Clematis heracleifolla DC., Syringa dilatata Nakai, Spiraceacanescens D.Don, spiracea salicifolia L., Prunus triloba Lindl; 6 new record host plants ofNortheast, Menispermum dauricum.DC., Amphicarpaea trisperma Bak., Saposhnikoviadivaricata (Truca.)Schischk., Incarvillea sinensia Lam., Ligusticum jeholense Nakai et Kitag.,Angelica miaueliana Maxim.