| Alternaria | |
|---|---|
| Leaf spot | |
 |
|
| Watermellon (Alternaria alternata) | |
| Scientific Classification | |
| Kingdom: | Fungi |
| Phylum: | Ascomycota |
| Class: | Dothideomycetes |
| Subclass: | Pleosporomycetidae |
| Order: | Pleosporales |
| Family: | Pleosporaceae |
| Genus: | Alternaria |
| Species: | Alternaria alternata |
| Synonyms | |
| Alternaria fasciculata (Cooke & Ellis) L.R. Jones & Grout (1897) Alternaria rugosa McAlpine (1896) |
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This article is for A. alternata. For other uses, see Leaf spot (disambiguation)
Leaf spot (Alternaria alternata) is a fungus which causes the appearance of round blemishes found on the leaves of many species of plants, mostly caused by parasitic fungi or bacteria.
Symptoms[]
A typical spot is "zonal", meaning it has a definite edge and often has a darker border. When lots of spots are present, they can grow together and become a blight or a blotch. Fungal spots are usually round or free-form in shape.
Treatment[]
Chemical[]
Treat with thiram or iprodione. Destroy diseased crops after harvest.
Prevention[]
Avoid using overhead watering systems.
Chemical[]
Iprodione, difenoconazole, tebuconazole and strobilurin are suitable protectants.
See Also[]
- Septoria leaf spot (Septoria lycopersici)
- White leaf spot (Pseudocercosporella spp.)
- Brassica dark leaf spot (Alternaria brassicicola)
- Grey leaf spot (Alternaria brassicae)
- Black leaf spot (Brassica) (Alternaria raphani)
References[]
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