Botrytis blight8/25/2023 Botrytis infections are favored by cool, rainy spring and summer. There are several species of the fungus Botrytis which can cause blights the most common is Botrytis cinerea. Botrytis blight or gray mold is a fungus disease which infects a wide array of herbaceous annual and perennial plants. We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA). Botrytis Blight: Botrytis cinerea Botrytis spp. The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. Botrytis blight is a fungal disease that flourishes during cool, damp weather and affects various parts of many plants, particularly tender plant tissue, such. This information is for educational purposes only. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Botrytis blight is one such fungal infection where you eventually see the offending fungus, not just the symptoms of the underlying disease. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. Botrytis leaf spots on hosta Botrytis leaf spots on Lillium Geranium stem infected with Botrytis Sclerotia on geranium stem Rudbeckia infected with Botrytis Regular fungicide applications will likely be necessary to reduce losses on especially susceptible hosts grown in humid environments. Botrytis cinerea can sporulate on dead plant material fallen leaves and petals should be carefully removed from production areas. Trash cans used for dead plant tissue should not be kept in production areas. Botrytis, commonly known as gray mold is a fungal disease affecting plants, vegetable and fruit plantations, and even ornamental shrubs. Management: Sanitation and aeration procedures that reduce humidity levels around plants and appropriate fungicide applications are recommended for disease control. Spread: Spores are produced in mass under humid conditions and are readily released and moved by air currents. Additionally, overwintering structures (sclerotia) are formed and can persist in soil and plant debris. Sclerotia are found on the surface of heavily diseased plant material. Signs: In high relative humidity grayish fuzzy mold on the surface of the affected tissue is visible with the naked eye. Symptoms: Seedling blight,leaf spots and blight, distortion of young leaves, crown rot, and blossom blight. Hosts: A very large host range, some of the most susceptible include Delphinium, Hosta, Iris, Lilium, Primula, Rudbeckia, and Viola. Blossoms are especially susceptible.
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