A Detailed Guide to the Prevention and Control of Brown Spot Disease in Primroses
Symptoms are prone to occur on the fairy primrose (Primula malacoides). Brown spots form on the leaves. The pathogen Alternaria sp. belongs to the deuteromycete Alternaria fungi. Transmission route: conidia are spread by wind and rain. Prevention and control method: spray 70% chlorothalonil wettable powder at 1000 times dilution or other fungicides at the early stage of the disease.
Symptoms are prone to occur on the fairy primrose (Primula malacoides). Brown spots form on the leaves.
The pathogen Alternaria sp. belongs to the deuteromycete Alternaria fungi.
Transmission route: conidia are spread by wind and rain.
Prevention and control method: spray 70% chlorothalonil wettable powder at 1000 times dilution or other fungicides at the early stage of the disease.