Early blight | Infonet Biovision Home.

Common Names

Early blight, Alternaria blight, dry blight, leaf spots, seedling blight, damping-off, collar rot, hard-rot of fruits

Featured Photo

Early blight on tomato leaf (c) A. M. Varela, icipe

Other Photos

Early blight symptoms on tomato fruits. Typical fruit spots occur at the stem-end as a rot that radiates out from the area of attachment between the calyx and the fruit. The spot is usually brown to black, firm, depressed and has distinct concentric rings. (c) Allen Stevens and Jon Watterson, Seminis Vegetable Seeds, Inc.

Early blight on tomato. Leaf spots of early blight are circular, up to 1.2cm in diameter, brown, and often show a circular pattern, which distinguishes this disease from other leaf spots on tomato. (c) BioVision

Early blight on potato tubers, early blight results in surface lesions that appear a little darker than adjacent healthy skin. Lesions are usually slightly sunken, circular or irregular, and vary in size up to 1.9cm in diameter. There is usually a well defined and sometimes slightly raised margin between healthy and diseased tissue. Internally, the tissue shows a brown to black corky, dry rot, usually not more than 6mm. Deep cracks may form in older lesions. (c) Chad Behrendt. Reproduced from University of Minnesota Extension.

Early blight on potato leaf. Affected leaves exhibit brown spots with concentric rings. Leaf spotting first appears on the oldest leaves and progresses upward on the plant. Entire plant could be defoliated and killed (c) www.plantpath.wisc.edu

Early blight symptoms on okra leaf. (c) M. Rutherford/CABI BioScience. Reproduced from the Crop Protection Compendium, 2004 Edition. � CAB International, Wallingford, UK, 2004

Early blight (Alternaria solani symptoms on tomato leaf. (c) Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org

Early blight fruit symptoms (c) A. A. Seif, icipe

notes

Notes for REVIEW

mh, 27.6.09 Hosts: Okra was lost, so does have no pestmodule so far, pls add (image is available). General info: Host list missing. Hot water seed treatment: pls include details/temperature. Sulphur and Copper, pls check info on sep. datasheet.

feaured_photo_co

A. M. Varela, icipe

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Is this a Minor Pest?

Scientific Name

Alternaria solani

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Common names; Early blight, Alternaria blight, dry blight, leaf spots, seedling blight, damping-off, collar rot, hard-rot of fruits

Host Plants

African Nightshade Eggplant Okra Potato Tomato