First Report of <i>Monarda didyma</i> Infection with <i>Impatiens necrotic spot virus</i> in Washington State

Fig. 3. M. didyma plant transplanted from a symptomatic plant in the field showing stem necrosis symptoms. The necrotic patches are distributed on the main stem as well as on side shoots. In advanced stages, the branches die.

Image from Plant Health Progress article:
First Report of Monarda didyma Infection with Impatiens necrotic spot virus in Washington State