Mycologia, DEUTEROMYCOTINA, HYPHALES .
Identification, Description, Biology, Epidemiology, Treatement, Possible misleading, Images
Sclerotial bodies, brown-greenish, rounded or sub-cilindrical; long olive green conidia, slightly curved, 2 - 6 septa.
This fungus causes a minor leaf spot disease consisting of grey-lead stains scattered on the lower leaf, turning totally black; the upper leaf becomes yellow or chlorotic; the older leaves of the outer shoots of the canopy fall, specially during spring and summer.
Sclerotia give rise to new mycelium that develops on the lower leaf and, occasionnaly, on the fruits and produce conidiophores and conidia.
Little information on dissemination of this disease is available. Rain water seems to have an important role in carrying conidia from infected leaves to healthy ones.
Wind can also carry the conidia from the leaves on the ground.
Infection starts in autumn after the first rains, from sclerotia.
HYP3 on line : Species (scientific name), Diseases (common names), Glossary, Crops.