Abstract
Powdery mildew Phyllactinia (Ovulariopsis cf. insolita) is reported on Funastrum clausum and F. cynanchoides in Sinaloa, Mexico. The fungus was reported as Oidium insolitum on Lycium chilense in Argentina, later as Phyllactinia chubutiana (anamorph Ovulariopsis insolita). This fungus was studied by light microscopy and molecular techniques. Fungal mycelium was smooth, effuse, with septate hyphae; appressoria distinct, or ramified; conidiophores pseudoidium type; mature conidium cingulum-like, subcylindric with sub-apical and sub-terminal protuberances. Two rDNA ITS nucleotide sequences were 99% homolog with P. chubutiana's sequence.
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