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Geranium botrytis blight1/7/2024 ![]() Instead, water the soil early in the day so that it has adequate time to dry before the cool evening temperatures arrive. Do not compost dead plant material infected with botrytis. Prune away infected plant parts and dispose of these in the garbage. Good sanitation practices, such as pulling weeds and keeping the soil clear of debris, are helpful in controlling botrytis blight in geraniums. Flowers and leaves may also begin to drop prematurely. On the leaves, you may see spots, lesions or large dead areas with concentric rings around them. If cool, damp conditions exist, these small black spots eat into the stem itself, consuming it entirely. On living plant tissue, botrytis infections are indicated by fuzzy gray or brown blooms and black spots on the stems. However, dried leaves infected by botrytis fungus disperse a fine dust into the air when moved. Symptoms of Infectionīotrytis fungi prefer to feed on dead plant material, but it is hard to detect infection in the dead foliage of your geranium. Because geraniums also prefer cool, moist conditions, botrytis is a common problem for these plants. Temperatures ranging from 50 to 60 degrees Fahrenheit are ideal for its growth. Botrytis fungi prefer cool, moist conditions. Botrytis fungi prefer to feed on dead or dying plant material, but if the fungus has ideal conditions for growth, it attacks living plant tissue as well. Even the air caused by walking past or pruning your plant can spread botrytis spores. Botrytis Blightīotrytis, sometimes called grey mold, is spread through the air as the fine spores are lifted from the soil and carried to your geranium. One of the most common fungi that attack geranium plants is botrytis blight, which is caused by the fungus botrytis cinerea. However, their preferred growing conditions make geraniums vulnerable to fungal infections, and the unseasonable wet, cool weather recently hasn’t helped matters. Zonal geraniums, which are tender perennials, usually are grown as annuals and prefer moist soil. The ever popular geranium, is prized in the garden because of its wide variety of colorful flowers and foliage. It had new buds on it that were seemingly dying before even blooming! However, when she sent me a photo what caught my eye was the browning leaves near the bottom right of the photo. ![]() She was having a problem with her geranium. This past week, I got a message from Laura Brinker. ![]()
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