Image Number: 1440028

Frogeye may develop on the leaves of tobacco in the plant bed, field, or barn. The spots on the leaves are quite distinct, typically circular, with a reddish-brown margin and tan or grey colored papery centers in which black masses (fruiting bodies) of the fungus may be found. Frogeye usually occurs on the lower leaves but moves up the plant as the season progresses, especially as the nitrogen supply is depleted. Sudden development of large dead in the upper leaves may occur near harvest. Frogeye may be confused with brown spot, wildfire, angular leaf spot, weather fleck, and physiological spotting, and it requires microscopic examination for diagnosis. Green spots on the leaves of cured tobacco may be the result of frogeye infection near harvest.
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Image location:
United States


Kingdom: Fungi
Phylum: Ascomycota
Subphylum: Pezizomycotina
Class: Dothideomycetes
Subclass: Dothideomycetidae
Order: Capnodiales
Family: Mycosphaerellaceae
Genus: Cercospora
Subject: Cercospora nicotianae Ellis & Everh.


Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Solanales
Family: Solanaceae
Genus: Nicotiana
Subject: Nicotiana tabacum (burley type) L.
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Image uploaded:
Monday, January 1, 1990
Image last updated:
Tuesday, May 17, 2011