Diseases That Attack Petunias
Diseases That Attack Petunias. Petunias are flowering annual plants used in flower beds, window boxes and hanging baskets. Ornamental petunias also are used in cut flower arrangements. Two general classes of petunias exist: the multiflora and the grandiflora. Both types may have single flowers or double flowers--with edges that can be straight or ruffled--and come in a variety of colors. Petunias are generally free of insect pests and diseases, but the plants can be affected by viruses and damping-off, according to the University of Rhode Island Landscape Horticulture Program website.
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