Question: My large plant of pyracantha has fire blight. The first is not serious to the health of the plant, but it can damage the look of the berries, which develop thick, brown corky spots on them. The other possibility is a bacterial disease called fireblight. The disease is easy to spot and effected leaves start to turn black and cracked as if it has been burnt by fire giving it its name Fireblight. New shoots wilt in late spring. Symptoms A necrotic blight of the flowers and rarely shoots. The cankers harbor the bacteria, which oozes from the lesion and is carried by wind, insects or rain to the healthy foliage. Nothing I have tried stops it. Pyracantha scab does not seem as serious as Fireblight but is very unsightly. The fungus Botryosphaeria causes similar symptoms. 48-hr reentry. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. The cheimical Myclobutanil as found in Bayer Garden Systhane Fungus Fighter which is available RTU or as a concentrate is approved for use by gardeners to control apple scab so should be effective on Pyracantha scab. See: Pear (Pyrus spp. 48-hr reentry. Affected twigs and branches may bend over into the shape of a shepherd's crook. Cause Erwinia amylovora, a bacterium that survives in affected wood of this and many other ornamentals. One thing is certain–no matter your choice, birds will flock to your garden. Relative Disease Susceptibility and Sensitivity to Sulfur, Diagnosis and Control of Phytophthora Diseases, APHIS List of Regulated Hosts and Plants Proven or Associated with Phytophthora ramorum, Plants Resistant or Susceptible to Armillaria Root Rot, Verticillium Wilt in the Pacific Northwest, Plants Resistant or Susceptible to Verticillium Wilt, Plants Susceptible to Sclerotinia sclerotiorum, Potential Impact of Cyanobacteria on Crop Plants, Management of the Cyanobacterium Nostoc in Horticultural Nurseries, Impatiens Necrotic Spot: New Name, Same Threat, Virus Certification Program for Fruit and Ornamental Trees, Care and Maintenance of Wood Shingle and Shake Roofs, Winter Injury of Landscape Plants in the Pacific Northwest, Recognizing Sapsucker Damage on your Trees, Key to Nutrient Deficiencies in Vegetable Crops, Key to Nutrient Deficiencies of Deciduous Fruit and Nuts, Use of Disinfestants to Control Plant Pathogens, Current Status of Biological Weed Control Agents in Idaho, Oregon, and Washington, Biological Control Agents and Their Roles, Restricted-use Herbicides in Idaho, Oregon, and Washington, Testing for and Deactivating Herbicide Residues, Herbicide Effectiveness on Weeds in Grass Seed Crops, Dry Bean East of the Cascades - Phaseolus spp. They would probably also give useful control of pyracantha scab, although this is not claimed by the manufacturers. Choosing the right pyracantha for your landscape is about the mature size of course, but also which color berry you prefer. It also causes the pyracantha to drop leaves and lose flowers and the berries become disfigured. Nu-Cop 50 DF at 1 lb/100 gal water. Group M1 fungicide. My plant is flaring up, one branch at a time. It usually goes unnoticed on ornamentals such as cotoneaster, hawthorn, and pyracantha. Group 25 fungicide. The symptoms on stems are similar to fireblight, but fireblight infection on Pyracantha is more sudden and severe than scab. How to Reduce Bee Poisoning from Pesticides, Alfalfa Leafcutting Bee (Megachile rotunda) Pests, Horticultural, Landscape, and Ornamental Crops, Field Characteristics of Fruit-Tree-Attacking Spider Mites in the Pacific Northwest, Pests of Cabbage and Mustard Grown for Seed, Pests of Rutabaga and Turnip Grown for Seed, Biology and Control of the Garden Symphylan, Bean, Dry Cultivar Resistance to Bean Common Mosaic, Grape (Vitis spp.) Pyracantha can suffer from mildew which is usually a white or grey mold. Group M1 + M3 fungicide. is there a cure for this problem. Fireblight, caused by the bacteria Erwinia amylovora, is a common disease of pyracanthas. CuPRO 5000 at 1.5 to 5 lb/A. Remove as much of the effected areas first to help prevent it spreading. Scab causes the blossoms and berries to turn black and appear scabby. Blackened flower parts remain attached to the plant. Hygiene is important for control, since the fungus survives winter on infected fallen leaves, infected fruits and pustules on infected stems. Pyracantha has Fire Blight. I have a pyracantha bush with a white crystallize fungus on bark and branches. Westland Plant Rescue Fungus Control is the only fungicide which is labeled to control Pyracantha Scab all though products containing the chemical myclobutanil such as Bayer Garden Systhane Fungus Fighter and teh chemical triticonazole such as Scotts Fungus Clear Ultra have been approved for use on ornamental plants for control of rusts and powdery mildews. Least 6 inches below affected tissue the lesion and is carried by wind, insects or rain to local... Fireblight infection on pyracantha is more sudden and severe than scab turn or... Pests that attack pyracantha shrubs would probably also give useful control of pyracantha fire. Disease normally effects open blossoms, new growth and leaves in the spring especially during.! 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