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Leaf spot

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Alternaria
Leaf spot
Watermelon Leaf Spot Alternaria alternata
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)
Alternaria tenuis Nees (1817)
Macrosporium fasciculatum Cooke & Ellis (1817)

Torula alternata Fr. (1832)

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.

SymptomsEdit

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.

TreatmentEdit

ChemicalEdit

Treat with thiram or iprodione. Destroy diseased crops after harvest.

PreventionEdit

Avoid using overhead watering systems.

ChemicalEdit

Iprodione, difenoconazole, tebuconazole and strobilurin are suitable protectants.

See AlsoEdit

ReferencesEdit

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