anthracnose (Colletotrichum nicotianae ) on burley tobacco (Nicotiana tabacum (burley type)) - 1440009

anthracnose
Colletotrichum nicotianae Av.-Saccá

Host: burley tobacco (Nicotiana tabacum (burley type) L.)
Descriptor: Symptoms
Description: Symptoms of anthracnose include spotting of the leaves, development of cankers on midribs and veins of leaves, and eventual stunting and/or death of transplants. Leaf spots are at first pinpoint size, water-soaked, and depressed. They enlarge to approximately 3 mm in diameter, are light tan in the center, and have raised dark borders. Veins and midribs are often infected, causing the leaf to become distorted. On plants ready to transplant, large red-brown cankers can develop on the stems and petioles. Severely affected plants are killed. With the aid of a hand lens, fruiting bodies called acervuli can be seen in affected areas. These fruiting bodies produce pink spore masses and may have black bristle-like appendages called setae. The disease is most common in plant beds that are weedy and/or deficient in nitrogen.
Image type: Field
Image location: United States

Specimen Information

Specimen in collection: No
Specimen Condition:
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Photographer Information

Name: R.J. Reynolds Tobacco Company Slide Set
Organization: R.J. Reynolds Tobacco Company
Country: United States

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Image Number: 1440009

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Image uploaded on Monday, January 01, 1990
Image Information last updated on Wednesday, March 23, 2011