Rhizoctonia Diseases in Tobacco Greenhouses 
TB07 - Tobacco Disease Note No. 7

Target spot symptoms
Figure 3. Infection of target spot on small plants (30 days-old) start as a small foci (group of infected plants) where environmental conditions (high humidity and temperature) are favorable for the primary infection and spread.
Figure 4.  Lesions (leaf spots) are more or less rounded, with a very distinct brown halo. At the beginning they may resemble chemical injury.

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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 Sept. 2001