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MATERIALS AND METHODS
2 Comparison of Sphaerotheca species pathogenic on rose
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Actidione Approx ascocarp production ascocarps ascospores ascus biological specialization callus callus tissue canadense cent sucrose solution Christopher Stone Chrysler Imperial CM CM conidia conidia produced conidium conldial control of blackspot control of powdery Cyprex detached shoots experiments felty flower production fungicides fungus Gamette germ tubes germination Geum canadense Goldilocks greenhouse Helen Traubel humidity humuli hyphae Incubation infected leaf inoculated inoculum isolation Karathane leaf discs leaf surface material medium mildew and blackspot mycelial mycelial growth mycelium observed pannosa persistent mycelium Phaltan plots polyantha roses powdery mildew Type prickles Red Wings replicates Rosa virginiana rose mildew rose powdery mildew rose varieties Salmon season secondary sporulation senoqnaajg sexual stage species specimens Sphaerotheca spores sporulation spray stem sections sterile studies substrates sucrose Table temperature Tlrginlana treatments Triumph de Orleans type mycelium type of mycelial variety Queen Elizabeth Wisconsin zineb