Description:A fungal disease causing dark brown to black spots usually with a series of concentric rings on leaves. The spot may merge to kill large areas of the leaf.
Potato.The spots are angular, up to 20 mm wide and look leathery.
Tomato.The spots on leaves are usually 6-12 mm diameter, somewhat oval and often with a yellow halo. On stems the lesions are elongated with obvious lines. On fruit the dark brown to black, sunken and concentrically lined or ringed lesion usually occurs near the stalk and causes rotting of one side of the fruit and extends into the heart. Tomato seedling may be killed when they are attacked near ground level.
Species Affected:Capsicum, Eggplant, Nightshades, Potato, Tomato and other Solanaceous species.
Biology:Favoured by warm moist weather.
Life Cycle:Origin and History:
Capsicums and TomatoesUse clean seed.
Related and Similar Species:References: