A fungus that thrives in wet Spring weather causes 'chocolate spot' on the leaves and stems of which vegetable?
Botrytis fabae Botrytis fabae Botrytis fabae is a plant pathogen, a fungus that causes chocolate spot disease of broad or fava bean plants, "Vicia faba". It was described scientifically by Mexican-born Galician microbiologist Juan Rodríguez Sardiña in 1929. Chocolate spot disease caused by "Botrytis fabae" manifests itself as small red-brown spots on leaves, stems and flowers of broad bean plants. These enlarge and develop a grey, dead centre with a reddish-brown margin. Spores form on the dead tissue and spread the infection to other plants. In severe infections leaves and flowers may fall and badly affected stems may keel over. The pathogen
Spot blotch (barley) Spot blotch (barley) Spot blotch is a disease of barley caused by "Cochliobolus sativus". The disease is found everywhere that barley is grown, but only causes significant yield losses in warm, humid climates. Infections appear as dark, chocolate-colored blotches. The spots merge, eventually forming irregular necrotic patches on the leaves. Leaf spots may be surrounded by a zone of yellow leaf tissue of varying width. Spot may also appear on the leaf sheaths, necks and heads of the plant. Heavily infected leaves dry up completely, and infections on the flag leaf during kernel filling are the most serious. The fungus