Rhizoctonia Diseases in Tobacco Greenhouses 

TB07 - Tobacco Disease Note No. 7


Target spot symptoms

Figure 5. In young seedlings infection starts underneath the leaf where moisture accumulates. Infection on lower leaves and later on the stem are characteristic symptoms of target spot. In a few cases seedlings die.

Figure 6.   The formation of the hymenium (reproductive structure of Rhizoctonia) can be observed underneath leaves of infected plants. This hymenium will form spores.

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Published by North Carolina Cooperative Extension Service
Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.

Reformatted Jan '00 by Plant Disease and Insect Clinic