This can be confusing because there are other plants in the genus Vinca that are perennial vines, which are also called vinca or periwinkle. This can make it problematic. Phytophthora blight is caused by phytophthora parasitica. It serves a much better purpose as a weed killer than does laying weed barrier or mulch; it is also much more beautiful to look at than mulch. According to the West Virginia University Extension Service, creeping myrtle flowers best in full sun, but can develop leaf burn in the winter months if planted in full sun. Subfamily: rauvolfioideae 4. Trailing stems with smooth, evergreen leaves (to 1.5" long) root at the nodes as they go along the ground and quickly spread to form an attractive ground cover. Prevention of Vinca Plant Problems Green Lacewings, parasitic wasps, predatory mites and ladybugs -- also called lady beetles or ladybirds -- are natural enemies that feed on spider mites, scales, aphids and whiteflies. Plan the perfect garden with our interactive tool →, Alabama Cooperative Extension System: Leaf Spot Diseases. Phytophthora blight is caused by phytophthora parasitica. Part shade to shade. Blossom: blue crown with yellow stamens 8. Leaf spot can make your vinca to look unattractive but it rarely kills the plant. This 6- to 12-inch-tall plant is no stranger to problems caused by pests, diseases and improper care. A small plant with an extensive growth habit, creeping myrtle is a popular ground cover option. The plant is in the Apocynaceae family. ***It is no longer recommended to plant Vinca minor (Periwinkle or Vinca), especially near or adjacent to natural areas because it is an alien invasive plant*** The usual symptoms on vinca include wilted shoots that darken and die with lesions near the base of the stem. Big Leaf Periwinkle Is an evergreen ground cover from Asia Minor which forms a dense mat. V. major, the bigleaf periwinkle, and V. minor, or common periwinkle, both have pretty blue or violet-blue flowers and bloom prolifically in the spring. Vinca minor, or Periwinkle, is an herbaceous perennial evergreen ground cover from Europe with blue-lavender flowers in spring and early summer. The root system is no longer able to … Phytophthora Blight. Vinca plants, also known as periwinkle and myrtle, are known for their multicolored flowers and glossy foliage. Kelli Bingham is a freelance writer with nearly a decade of experience in the field. These stems spread out horizontally over the ground and can root where they come in contact with the soil. Only 6 left in stock - order soon. Iron deficiency in the soil will lead to faded, discolored and spotted foliage on the creeping myrtle. Some of the more commonly seen pests on annual vinca plants include aphids, spider mites, scale and whiteflies. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. $31.48 $ 31. It is a common disease of vinca and it can be particularly destructive to the plant. A popular groundcover, it has escaped to natural areas where it crowds out wildflowers and other herbaceous natives. 2.6 out of 5 stars 8. Stem blight is most prevalent when spring weather is cool and wet, but can also occur in the fall if conditions are moist and the humidity is high. © Copyright 2020 Hearst Communications, Inc. They produce an abundance of single, 1"-2" funnel shaped flowers with five flared and flattened petals, beginning in mid-spring and continuing throughout the summer. Healthy creeping myrtles typically withstand pest infestation without the use of chemicals. Problems With Creeping Myrtles. Regularly removing plant debris, pruning infected leaves or stems and thinning crowded plants in dry fall weather will help keep this fungal disease at bay. Creeping myrtle grows in full sun to partial shade. Vinca minor vines stay short, sprawling out over the ground. 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