Australia

Grey leaf spot

Stemphylium solani, Cercospora cladosporiodes

Leaf lesions initially appear as small, brownish-black specks. These lesions develop into grayish-brown, glazed angular lesions approximately 3 mm (0.13 in.) in diameter and are often surrounded by a yellow area. Eventually they dry up and develop cracks in their centers. If numerous lesions develop yellowing of the leaf occurs, followed by leaf drop, and eventually defoliation of the plant. The fruit and stems are not affected by this fungus.