Antirrhinum rust is the most serious disease of antirrhinums (snapdragons). It is a fungal disease that causes dark brown spots on the undersides of leaves. Severely affected leaves shrivel and may die.
Scientific name Puccinia antirrhini
Plants affected Antirrhinum
Main symptoms Yellow spots on the upper leaf surface, dark brown pustules on the undersides
Caused by Fungus
Timing Late spring to autumn
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