dc.description.abstract | Powdery mildews infects ornamental plants, cash crops like wheat or even roadside weeds, so it is very relevant to our lives, and the infection is in the leaves of the plant, the stem flower fruit, and the obvious symptom is that it produces white spots on the leaves. Twist and shrink plants. And powdery mildews have special structures such as appressoria and haustoria to absorb plant nutrients. Because Taiwan is located between the tropical and subtropical climates, it is suitable for powdery mildew to grow and predominance of the asexual generation. The last checklist record of powdery mildew was on 1998. But in recent years, other exotic species have been introduced, which may lead to more new records of host and parasite. We usually use ITS DNA sequences to identify species more clearly, but we also want to use protein genes to identify species more precisely. In this study, twenty samples were collected, four new hosts of Podosphaera xanthii, two new hosts of Golovinomyces genus (Coccinia grandis as new host of Golovinomyces orontii), (Bothriospermum zeylanicum as new host of Golovinomyces cynoglossi) and a new host record of Erysiphe genus (Melilotus indicus as new host of Erysiphe trifolii). In addition, we used the protein genes (Beta-tubulin, RPB2, Histone 3, TEF1-α) to try to make more accurate classification in identification. | en_US |