Magnaporthiopsis maydis
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Author(s): Ofir Degani and Gilad Cernica
Source: Advances in Microbiology, 2014, 4, 94-105
Magnaporthiopsis maydis (Samra, Sabet & Hing.) Klaubauf, Lebrun & Crous 2014 - (late wilt of maize)
The fungus causes late wilt of maize in the Mediterranean region and in western Asia. During outbreaks in Egypt and India yield losses of 50% and more have been reported. Infected maize plants show light green leaf stripes, followed by rolling of the leaves from the edges. Symptoms progress from lower to upper leaves and result in yellowing, necrosis and drying up of the leaves. Vascular bundles in the stalk turn reddish-brown. Mainly seedlings become infected and maize plants can show rapid wilting, typically before tasseling, as well as plant death. Lupine and cotton may also become infected.
The fungus is soil-borne and seed-borne. It persists as sclerotia in the soil and in plant debris. Infections start through the roots or the germinating seed. The fungus quickly spreads inside the plant through the xylem vessels. In an advanced stage of infection, sclerotia develop and vessels become blocked by hyphae causing wilting. No sexual stage of the fungus is known.
| Vernacular names | |
|---|---|
| • Deutsch: | Gefässbündelkrankheit des Mais |
| • English: | late wilt of maize |
| • Español: | cefalosporiosis del maíz |
| • Français: | céphalosporiose du maïs |
As a serious, seed-borne pathogen with a limited geographic distribution, the fungus is also of quarantine concern. For control, resistant cultivars and the use of fungicides are recommended.
Synonyms:
Acremonium maydis
Cephalosporium maydis
Harpophora maydis
