Geranium: Bacterial blight categories: Flowers Geranium Geranium Diseases Ornamentals last review date: 2026-05-14 09:15 Geranium stem rot Photo by: R.S. Byther Biology bacterial blight (leaf spot and stem rot) arises due to a bacterium that can survive in soil for more than 6 months. These bacteria cannot survive in soil after the plant decomposes. They are […]
Geranium: Botrytis leaf spot and blossom blight categories: Flowers Geranium Geranium Diseases Ornamentals last review date: 2026-05-14 09:34 Botrytis blight damage on geranium flower Photo by: R.S. Byther Biology Botrytis is a fungus which thrives under mild environmental conditions. Brown, water-soaked areas appear on leaves and petals. The spots soon dry out and become covered […]
Geranium: Oedema categories: Flowers Geranium Geranium Diseases Ornamentals last review date: 2026-05-14 09:53 Oedema symptoms on top and bottom of geranium leaf Photo by: R.S. Byther Biology Oedema is a physiological problem that occurs when the soil is warmer than the air, soil moisture is high, and relative humidity is also high. Lower transpiration rates […]
Geranium: Rust categories: Flowers Geranium Geranium Diseases Ornamentals last review date: 2026-05-15 05:57 Geranium rust: upper leaf surface and lower leaf surface Photo by: R.S. Byther Biology Rust is caused by a fungus that lives on plants and plant debris. This disease can spread by wind-blown spores or infected cuttings. Infections occur easily if leaves […]