Controlling powdery mildew and rust in roses
Powdery mildew is undoubtedly the most widespread disease of roses. The causal fungus, Sphaerotheca pannosa var. rosae, appears as a white or gray powdery or mealy coating on the leaves, tender stems, and flower buds. It distorts and discolors those areas, causes defoliation, and reduces plant vigor...
| 發表在: | California Agriculture |
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| Main Authors: | , |
| 格式: | Article |
| 語言: | 英语 |
| 出版: |
University of California Agriculture and Natural Resources
1988-07-01
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| 在線閱讀: | https://californiaagriculture.org/article/110619-controlling-powdery-mildew-and-rust-in-roses |