Collar Rot in Tobacco Greenhouses
TB06 - Tobacco Disease Note No. 6
W. A. Gutierrez,  H. D. Shew, and T. A. Melton 


 
 

Pathogen stuctures

Figure 19 (left)  Sclerotia (overwinter structure)
Figure 20 (right)  Sclerotium germination. The way that S. sclerotiorum sclerotia germinate in greenhouse pathosystem is the carpogenic germination. 

Figure 21.  A) Cross section of an apothecium, B) asci and acospores, and C) apothecium releasing ascospores.

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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