Controlling powdery mildew and rust in roses
oleh: A Paulus, J Nelson
| Format: | Article |
|---|---|
| Diterbitkan: | University of California Agriculture and Natural Resources 1988-07-01 |
Deskripsi
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.