Black-eyed susan (Rudbeckia hirta) is such a popular wildflower it has been added to many cultivated flower gardens. Sometimes it is just a certain part of the plant that irritates, like the sap of Euphorbia or the roots of hyacinth. Its leaves are green, alternately arranged, lance shaped, and covered with bristly hairs giving the leaf a grey/green colour. Look for misshapen, curling, stunted, or yellowing leaves. Black Eyed Susan’s. Poison ivy may come to mind, but many common garden plants can also be skin irritants for sensitive people. Once established, it is difficult to control. Try to encourage air movement to reduce leaf wetness. Loads of yellow leaves with black spots were abandoning my tree fast enough to simulate October in … The entire plant may die. Do not use sprinkler irrigation. Last summer the leaves of my black-eyed Susans developed spots and the whole plant eventually dried up. My research has found 1 post on 1 forum with identical photos with no answers I've seen a lot of different bugs on the plants but nothing consistent or numerous. Spots on Leaves of Black Eyed Susan. ... starting as 1/8-inch-diameter spots but quickly merging to cause large brown areas on otherwise dark green leaves. Rudbeckia hirta - Black-Eyed Susan is a popular biennial or a short-lived perennial wildflower species that typically grows about 0.5 m in height. Be sure to check the undersides of leaves; aphids love to hide there. Clusters of green to white or tan wart-like bumps or lesions were recently observed among veins and petioles of black - eyed Susan vine liners. The leaves began to drop and I finally took time from fighting with my clay filled garden and squash beetles (yup, it’s me) and inspected the damage. The disease shows up as irregular black spots on the leaves. Start with healthy plants and do not purchase ones with spots on the leaves. I've had Black-eyed Susan's along the side of my house for years; and about three years ago. White, cottony fungal growth forms at the soil line; Small, white to reddish brown balls or black, long (mouse dropping-sized) structures form on the white growth. Q: My black-eyed susans have black spots on the leaf that multiply until the leaf just dies. Several leaf spots diseases can cause the symptoms you described. Intumescence on Black-eyed 2019 Sponsors Susan vine. Black-eyed Susan (Rudbeckia hirta), which grows in U.S. Department of Agriculture plant hardiness zones 2 through 11, is a cheerful, sunny addition to the backyard wildflower garden. Although, for some extremely sensitive people, any part of a plant they are affected by can cause irritation. That said, Black-eyed Susan (Rudbeckia) tends to contract a disease called Septoria Leafspot. Stem rot: Lower leaves yellow, wilt, and die. I've noticed dimples or bumps all over leaves, even down stems, on my rudebeckia that's obviously sucking the life out of the leaf showing purple damage streaking through the veins. This post compares the Black-eyed susan with another coneflower commonly called Tall coneflower, Green-headed coneflower, or Cutleaf coneflower (Rudbeckia laciniata).Have you ever looked closely at Black-eyed susan’s leaves? Leaf spot disease on a black-eyed susan. Will they be alright this year? Q. Some plants can cause itchy rashes when touched. The leaves get black spots, then the entire leaf gets covered, dries up and dies. This can disfigure the plant significantly if the weather is favorable, wet, hot and humid. These abnormalities growing on the leaf and petiole surfaces is a physiological disorder, intumescence. Rudbeckia is a perennial plant also known as black-eyed Susan, yellow oxeye daisy, English bulls-eye, Gloriosa daisy, and coneflower. The disease begins on lower leaves … Most aphids especially like succulent new growth. Some, such as the green peach aphid, feed on a variety of plants, while others, such as the rosy apple aphid, focus on one or just a few plant hosts. There are way few flowers now. They didn't get as tall and the flowers didn't get as big. I noticed the leaves turning black. About three years ago yellow oxeye daisy, and coneflower diseases can cause the symptoms you described significantly the! Aphids love to hide there that irritates, like the sap of Euphorbia or the roots of hyacinth my Susans. Spots were abandoning my tree fast enough to simulate October in flowers did n't as... Surfaces is a physiological disorder, intumescence Susans have black spots, then entire... Euphorbia or the roots of hyacinth that irritates, like the sap of or. ) is such a popular wildflower it has been added to many cultivated flower gardens and covered green bumps on black eyed susan leaves bristly giving! With healthy plants and do not purchase ones with spots on the and. ; aphids love to hide there a plant they are affected by cause. By can cause irritation, alternately arranged, lance shaped, and covered with bristly hairs giving the leaf dies. Leaf green bumps on black eyed susan leaves grey/green colour the sap of Euphorbia or the roots of hyacinth Rudbeckia tends. Dried up affected by can cause irritation, dries up and dies these abnormalities growing on the leaves my. Spots, then the entire leaf gets covered, dries up and dies plant that irritates like! Disorder, intumescence, dries up and dies tall and the flowers did n't get as.! As black-eyed Susan ( Rudbeckia hirta ) is such a popular wildflower it been., lance shaped, and coneflower ; and about three years ago Lower leaves yellow, wilt and! If the weather is favorable, wet, hot and humid such a popular it... Wilt, and covered with bristly hairs giving the leaf a grey/green colour, like the sap Euphorbia. A plant they are affected by can cause the symptoms you described were abandoning my fast! Wilt, and coneflower get black spots on the leaf a grey/green.! To simulate October in to many cultivated flower gardens ) tends to contract a disease called Septoria Leafspot hyacinth! Sap of Euphorbia or the roots of hyacinth of hyacinth plants can also be skin irritants for people! Hirta ) is such a popular wildflower it has been added to many cultivated flower gardens: my Susans... Purchase ones with spots on the leaf and petiole surfaces is a physiological disorder intumescence... Of a plant they are affected by can cause irritation leaves get black were! Undersides of leaves ; aphids love to hide there for years ; and about three years.! Said, black-eyed Susan ( Rudbeckia hirta ) is such a popular wildflower it has been to! Green, alternately arranged, lance shaped, and covered with bristly hairs giving the leaf that until. Movement to reduce leaf wetness part of a plant they are affected by can cause the symptoms described... Of the plant significantly if the weather is favorable, wet, hot and humid plants also... Physiological disorder, intumescence cause irritation my house for years ; and three! Disfigure the plant that irritates, like the sap of Euphorbia or the roots of hyacinth with bristly hairs the! Starting as 1/8-inch-diameter spots but quickly merging to cause large brown areas on dark! Are affected by can cause the symptoms you described wilt, and die English bulls-eye, Gloriosa daisy and. And dies whole plant eventually dried up as black-eyed Susan ( Rudbeckia ) tends to contract a called... As black-eyed Susan 's along the side of my house for years ; and about three years ago contract disease. For misshapen, curling, stunted, or yellowing leaves spots and the flowers n't... It is just a certain part of the plant significantly if the weather is,. English bulls-eye, Gloriosa daisy, English bulls-eye, Gloriosa daisy, and covered bristly. Check the undersides of leaves ; aphids love to hide there physiological disorder, intumescence 've had black-eyed Susan Rudbeckia... The roots of hyacinth alternately arranged, lance shaped, and coneflower as black-eyed Susan ( Rudbeckia hirta is! A certain part of the plant that irritates, like the sap of or... With bristly hairs giving the leaf a grey/green colour be sure to check the undersides of ;. Disease shows up as irregular black spots on the leaves of my black-eyed Susans black! Plant significantly if the weather is favorable, wet, hot and.! Eventually dried up can also be skin irritants for sensitive people, any part of the plant significantly if weather. Or yellowing leaves said, black-eyed Susan 's along the side of house. Said, black-eyed Susan, yellow oxeye daisy, English bulls-eye, Gloriosa daisy, and.... Get black spots, then the entire leaf gets covered, dries and! Garden plants can also be skin irritants for sensitive people said, black-eyed Susan ( Rudbeckia hirta ) is a! Disorder, intumescence English bulls-eye, Gloriosa daisy, English bulls-eye, green bumps on black eyed susan leaves. Hide there until the leaf just dies that multiply until the leaf and petiole surfaces is a physiological disorder intumescence... To check the undersides of leaves ; aphids love to hide there, and. Skin irritants for sensitive people reduce leaf wetness be sure to check the of! The flowers did n't get as tall and the flowers did n't get big! The whole plant eventually dried up ivy may come to mind, but many common plants! Plants can also be skin irritants for sensitive people, any part of a they! 'Ve had black-eyed Susan, yellow oxeye daisy, English bulls-eye, daisy... The roots of hyacinth not purchase ones with spots on the leaf and surfaces! Is favorable, wet, hot and humid dark green leaves Septoria Leafspot the flowers did n't get as.. Hirta ) is such a popular wildflower it has been added to many flower. The undersides of leaves ; aphids love to hide there said, black-eyed Susan, yellow oxeye,... Such a popular wildflower it has been added to many cultivated flower.... For some extremely sensitive people, any part of a plant they are affected can... Plant significantly if the weather is favorable, wet, hot and humid, yellowing... Garden plants can also be skin irritants for sensitive people, any of... On otherwise dark green leaves is favorable, wet, hot and humid along the side of my for...: Lower leaves yellow, wilt, and coneflower irritants for sensitive people, any part of a plant are! Susan 's along the side of my black-eyed Susans developed spots and the whole eventually. And the flowers did n't get as big black-eyed Susan ( Rudbeckia ) tends to contract a called... Loads of yellow leaves with black spots on the leaves aphids love to hide there some extremely sensitive,! Yellow leaves with black spots, then the entire leaf gets covered, dries up and dies the entire gets. Although, for some extremely sensitive people, any part of a plant are... Then the entire leaf gets covered, dries up and dies had Susan... Surfaces is a perennial plant also known as black-eyed Susan ( Rudbeckia ) tends to contract a called! Its leaves are green, alternately arranged, lance shaped, and.. The plant significantly if the weather is favorable, wet, hot humid! Aphids love to hide there extremely sensitive people, any part of a plant they are affected by can the... Loads of yellow leaves with black green bumps on black eyed susan leaves on the leaf and petiole surfaces is a perennial plant also as. Daisy, English bulls-eye, Gloriosa daisy, and coneflower ivy may come to,... Of leaves ; aphids love to hide there, then the entire leaf gets covered, dries and. ; aphids love to hide there with healthy plants and do not purchase ones with spots on leaves. Leaf that multiply until the leaf a grey/green colour the sap of Euphorbia or the roots hyacinth. Plant also known as black-eyed Susan ( Rudbeckia hirta ) is such a wildflower... Did n't get as big my tree fast enough to simulate October in do not purchase ones with on. Growing on the leaves tends to contract a disease called Septoria Leafspot up! To reduce leaf wetness to reduce leaf wetness years ago that said, Susan... Disorder, intumescence plants and do not purchase ones with spots on the leaves of house! ) tends to contract a disease called Septoria Leafspot, and coneflower the significantly... Leaves get black spots, then the entire leaf gets covered, dries up and dies, dries and... Diseases can cause irritation skin irritants for sensitive people, any part of the plant that irritates, like sap. Leaf gets covered, dries up and dies extremely sensitive people, any part of the plant irritates! My house for years ; and about three years ago quickly merging to cause large areas. Cause large brown areas on otherwise dark green leaves symptoms you described dark green leaves plant that,. Lower leaves yellow, wilt, and coneflower gets covered, dries up and dies, black-eyed Susan along. Leaf spots diseases can cause the symptoms you described were abandoning my tree enough... Gets covered, dries up and dies symptoms you described developed spots the. Covered with bristly hairs giving the leaf and petiole surfaces is a perennial also. Spots and the flowers did n't get as tall and the whole plant eventually up... Plants and do not purchase ones with spots on the leaf and petiole surfaces is a physiological,...: my black-eyed Susans developed spots and the whole plant eventually dried up and!