Survey of powdery mildews associated with range plants in Lorestan province.

To identify powdery mildew fungi associated with range plants in Lorestan province, specimens were collected and micrometeried. All morphological characters of clistothecium, asci, spore and conidium of the fungus organs were recorded and shapes drawn by drawing tube. At the end, powdery mildews were identified with the help of identification keys. Fungi species of leveillula chrozophora U.Braun, Erisiphe convolvuli DC. var. convolvuli, Leveillula taurica (Lev.) G. Arnaud, leveillula verbasci (Jacz.) Golovin, Erysiph polygoni DC.ex.Amons., Erysipe pisi DC. var. pisi, Erysiphe galli var. riedliana were identified on these plants, that the plant species of Chrozophora hierosolimitana spreng. for the fungal species of Leveillula chrozophora, Convolvolus arvensis for Erysiph convolvoli DC. var. convolvuli, Cousinia khorramabadensis Bornm., Centaurea virgataand Echinops mosulensis Reshf. for Leveillula taurica, Verbascum sp for L.verbasci, Medicago sativa for Erysiph pisi var. pisi, and Scherardia arvensis for Erysiph galli var. riedliana are the first report for Iran, Also plant species of Polygonum avicular for Erysiph polygoni Dc.ex.Amons and Althea sp, Alhagi sp. for L.taurica in Lorestan provinces are new host species respectively.