Collar Rot in Tobacco Greenhouses
TB06 - Tobacco Disease Note 6
W. A. Gutierrez,  H. D. Shew, and T. A. Melton 

Symptoms in greenhouses

Figure 1.  When the canopy has formed, ascospores land on susceptible tissue (debris, injured tissue, and senescent leaves) and infection begins.

Figure 2.  Foci are small groups of plants where infection started.

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Collar Rot in Tobacco Greenhouses
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Caution: The information and recommendations in these Notes were developed for North Carolina conditions and may not apply in other areas.

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.

Revised July 2001 by Plant Disease and Insect Clinic