Pennsylvania Flower Growers #158
The technique of culturing cuttings was first used commercially about twenty years ago. Verticillium Wilt was to be found in nearly all greenhouses in which chrysanthemums were grown, its severity varying with variety. With the more susceptible varieties it was common to see entire crops rendered essentially worthless. Verticillium Wilt is caused by a soil inhabiting fungus that invades the water conducting tissues of the plant, grows upward in them, and eventually causes the leaves to wilt. It may attack through the roots of healthy plants when they are planted in infested soil, or it may be introduced to noninfected soil in cuttings taken from diseased plants. The difficulty in obtaining control lay in the fact that the disease is readily transmitted through cut tings taken from diseased plants.
Keywords: Verticillium Wilt Soil inhabiting fungus CULTURING TECHNIQUE transmitted by soil and water chrysantheum stunt virus