What are the control methods for primrose brown spot 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. Control method: spray fungicides such as 70% chlorothalonil wettable powder at 1000 times dilution in the early stages 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.
Control method: spray fungicides such as 70% chlorothalonil wettable powder at 1000 times dilution in the early stages of the disease.