fungus on honeysuckle
Hose the entire honeysuckle down thoroughly, paying close attention to the mildew-infected leaves and stems. Honeysuckle leaf blight is caused by the fungus Insolibasidium deformans. She recently became a licensed insurance agent but has decided to pursue a writing career instead. The information contained within may not be the most current and accurate depending on when it is accessed. Severe outbreaks on valuable plantings can be prevented by an occasional application of a copper fungicide, Fore or clorothalonil (Daconil 2787). Leaf spots from this disease are clearly visible on the top and bottom of the leaf and the edges of the spots are distinct. Trumpet honeysuckle (Lonicera sempervirens), for example, is a deciduous vine that blooms in orange-red from spring to fall while winter honeysuckle (Lonicera fragrantissima) is an evergreen shrub in warm Mediterranean climates that blooms in white in late winter. Use sharp hand pruners to remove the infected stems. Do this in the morning so the honeysuckle can dry before evening. Cankers will appear on the stems as sunken discolored areas. Spray the honeysuckle with preventive fungicide in early spring. This article originally appeared in the July 26, 1996 issue, p. 131. Honeysuckle vines can contract two common diseases, powdery mildew Sooty mold (Alternaria) is a deep black fungus that forms a dark coating on the surface … Family Caprifoliaceae (Honeysuckle Family), University of California Agriculture & Natural Resources: Canker Diseases, University of California Agriculture & Natural Resources: Stem Cankers and Dieback, University of California Agriculture & Natural Resources: Powdery Mildew on Ornamentals, University of California Agriculture & Natural Resources: Sudden Oak Death, University of California Division of Agriculture and Natural Resources: Nursery Guide for Diseases Caused by Phytophthora Ramorum on Ornamentals: Diagnosis and Management, Missouri Botanical Garden: Lonicera Sempervirens, Missouri Botanical Garden: Lonicera Fragrantissima, Missouri Botanical Garden: Lonicera Periclymenum “Serotina”, Missouri Botanical Garden: Lonicera Involucrata, Hardy & Resistant Perennial Vine Climbers. It grows to a height of 8 to 15 feet and is hardy in USDA zones 4 to 9. They are caused by fungi which infect the plant through open wounds on its stems. Ms. Raine is hoping to have her first novel published soon. Sooty Mold. Honeysuckle species are generally susceptible to the same diseases, although some are naturally resistant. California bay laurels (Umbellularia californica), camellias (Camellia spp.) Powdery mildew is a fungal disease that flourishes when temperatures are between 60 and 80 degrees Fahrenheit. A local cooperative extension office can diagnosis the disease. This article was originally published on July 26, 1996. It has good disease resistance and is hardy in USDA zones 4 to 10. The leaves of infected honeysuckles wilt and develop dead, brown or blackened tissue at the tips and along the edges. The leaves are often rolled and twisted and drop prematurely. Powdery mildew appears on the leaves as white powdery-looking spots or splotches. Trumpet honeysuckle has good resistance to these diseases. Place the stems in the garbage to prevent further spread of the disease. Watering from below the honeysuckle branches will help reduce the likelihood of infection. Similar symptoms can be caused by excessive fertilizer, drought, root injuries and other physiological problems. The “Serotina” woodbine cultivar (Lonicera periclymenum “Serotina”) is another honeysuckle vine with good disease resistance. The lower surface of infected leaves show a silvery-white coloration, caused by the presence of the fungus. Ames, IA 50011-2031 The disease may also be present at a garden center or nursery. The fungus overwinters in dead leaves. Any cultural practice that removes overwintering foliage will reduce inoculum sources (i.e.
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