Pythium Root Rot in Tobacco Greenhouses
TB08 - Tobacco Disease Note No. 8
W. A. Gutierrez and T. A. Melton 

Symptoms on plants

Figure 3 (left).  Symptoms of the foliage are: yellowing of lower leaves (lack of nitrogen), upper leaves have a dark green appearance, and wilting.
Figure 4 (right).  The wilting is more noticeable at noon, when temperatures in the greenhouse are higher.

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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 October 2001 by Plant Disease and Insect Clinic