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Black root rot impacts a range of woody and herbaceous ornamental plant species primarily in greenhouse ornamental plant production, but also in home and commercial landscapes and nurseries. This disease causes decay of the root system and leads to yellowing, wilting, and necrosis of foliage. It is widely distributed and has been described on approximately 30 plant families in many parts of the world. Some of the most frequently impacted ornamentals are pansy, viola, Calibrachoa, annual vinca (periwinkle), Salvia, petunia, Persian cyclamen, snapdragon, Begonia, Verbena, Phlox, and Gerbera daisy. In addition to ornamental plants, some vegetable and other agricultural crops are also susceptible to infection.
Identification and management of Phytophthora in annuals and herbaceous perennials in greenhouses and in the landscape is discussed in this disease fact sheet.
Botrytis blight, or gray mold, is a fungal disease that is widespread in the United States and globally. This fungus spreads via spores in the air and can result in economic losses if not managed early. In North Carolina, this pathogen is most threatening in the spring when temperatures are cool. This factsheet provides information about the disease, how it spreads, when it is a problem, and how to manage it through cultural and chemical practices.
