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.
Collar Rot in Tobacco Greenhouses
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Revised July 2001 by Plant Disease and Insect Clinic