Colletotrichum violae-tricoloris: Apply a fungicide registered for use on pansy. Medallion WDG at 1 to 2 oz/100 gal water is labeled for several leaf-spotting organisms. Daconil Weather Stik at 1.4 pints/100 gal water. Not so with 'Delta Marina' pansy. Use with oils or adjuvants may cause plant damage. Start with healthy transplants in a well drained soil, provide balanced nutrition, and avoid over-watering. Connect with UMass Extension Greenhouse Crops & Floriculture Program: UMass Research and Education Center Farms, Conservation Assessment Prioritization System (CAPS), Extension Risk Management/Crop Insurance Education, North American Aquatic Connectivity Collaborative, Civil Rights and Non-Discrimination Information. Do not use a silicone-based surfactant. Xanthomonas leaf spot on Poinsettias Symptoms of Xanthomonas campestris pv poinsettiicola begin with dull gray water-soaked areas. Heritage at 1 to 2 oz/100 gal water plus a non-silicone-based wetter sticker. Possible pansy diseases include fungal leaf spots, downy mildew, powdery mildew, rusts, gray mold, root and stem rot and viruses. Group 19 fungicide. Spots generally are on the lower foliage first. 12-hr reentry. Plant leaves and stem may become stunted and brittle. Symptoms Cercospora violae produces large, fast spreading purple lesions on lower, older leaves that dry and turn necrotic. Anthracnose and cercospora leaf spot are similar diseases but differ in their symptoms. The spots may range in size from 1/8 to 1/4 inch. However, watering should be done early in the day to give the foliage a chance to dry before nighttime. Dark concentric lines form within the spots. Greenhouse grown pansies may have problems with Cercospora leaf spot. Resources from UMass Extension and the Center for Agriculture, Food and the Environment: ag.umass.edu/coronavirus. Focus on cultural controls. Q. I am doing a report about pansies. Yellow pansy leaves may appear before signs of fungus are evident. The blossoms come in a wide array … Other Leaf Spots: There are many fungi (Alternaria species, Cercospora species, Myrothecium species and Ramularia species) that can cause unsightly spots on pansy foliage. Leaf spot diseases and powdery mildew are two of the fungal sources of white spots on pansy leaves. 12-hr reentry. Anthracnose: This is another very common leaf spot on pansies. They seem to affect forest pansy trees that are planted where they receive too much sun. The leaf spots are typically pale or grey with thick, black margins that sometimes appear to have a concentric ring pattern. Fungal spores are spread by water splashed from overhead irrigation or rainfall. Anthracnose is first seen as brown to tan spots appearing on the tip or edge of the leaf. Group 11 fungicide. Fungicide and Nematicide Tests 58: OT041. These abiotic spots will not be controlled with pesticides so a good diagnosis is important. One of the most common leaf spot diseases of both pansies and violets is caused by the fungus Centrosporafungus include b achelor ’s b ut ton or cor nflower, butterc up, Cante rbury bells, Chin ese for get- me-not, columbine, delphinium, lobelia, penstemon, petunia, and scabiosa. Efforts to maximize plant vigor by fertilizing and watering are helpful. Nu-Cop 50 DF at 1 lb/100 gal water. Eagle 20 EW at 6 to 12 fl oz/100 gal water. The sweet-scented flowers arise from clumps of oval, dark green leaves. May discolor blooms. They seem to affect forest pansy trees that are planted where they receive too much sun. Cause Several fungal leaf spots have been reported from the Pacific Northwest including Ramularia agrestis, R. lactea, and Cercospora violae. Reference Hagan, A.K. Regular sprays with a foliar fungicide will control the disease. A few bacteria and viruses can also cause leaf spots but are not as common. 12-hr reentry. Insignia SC at 3 to 6 fl oz/100 gal water. Note Although Trinity TR is registered it is not recommended due to phytotoxicity issues. Group 3 fungicide. Viola odorata and Viola tricolor. I have recently planted violas in tubs how ever they are suffering from pansy leaf spot I have read that it is a air Bourne disease and is normally already in the plants prior to the buying of them from the garden centre does any one have a cure other than throwing them away as they really look poorly. Myclobutanil 20 EW T&O at 6 to 12 fl oz/100 gal water plus spreading agent. Chemical control of Cercospora leaf spot of pansy, 2002. Zyban WSB at 24 oz/100 gal water. Plants in containers and those in the ground can be equally affected. Fungal spores are spread by water splashed from overhead irrigation or rainfall. What do you know about pansies? Avoid excessive runoff to small plants, which may result in stunting and/or chlorosis. (anthracnose) are also common leaf spot problems. Slugs, snails and glasshouse red spider mite are common insects. 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