lilac leaf curl
Prune lilacs that show visible signs of leaf curling, as well as other symptoms of diseases, including wilt, brown or black spots on the leaves and leaf drop. If overhanging branches have grown to a point that they cause the lilac to sit in the shade for much of the day, trim these back. Lilacs (Syringa spp.) She resides in Horsham, Pennsylvania. Severe infestations cause the entire lilac bush to exhibit curled leaves. Several problems can cause lilac leaves to curl. Powdery mildew is often controlled using simple cultural modifications aimed at increasing the circulation around a troubled lilac. Powdery mildews are a group of host-specific fungi whose subspecies often trouble gardeners when other fungi are inactive. Even so, its best to be prepared if you have a run in with lilac pests and diseases, so we made up a list of common lilac pr… Herbicide damage, such 24D, sprayed on the plant will also cause it. Powdery mildew. A lilac bush makes an ornamental natural decoration for a garden or yard, blooming with bright flowers and lush green leaves through most of the spring, summer and fall. If your lilacs are in need of chemical rescue, several safer and effective products are available for powdery mildew control. They were fine last year. Additionally, fungal diseases such as powdery mildew cause leaves to curl as the leaves are wounded and the plant starts to die. Trimming your lilac bush regularly ensures enough sunlight and air penetrates to all of the leaves and flowers. The bacteria Bacillus subtilis can prevent re-infestation by powdery mildew if applied before the disease takes hold.

Lilac is regularly troubled by powdery mildews, but they do little damage to the … Protecting the lilac is key to keeping its leaves healthy. Several problems can cause lilac leaves to curl. Shoemaker Richards also edits for several independent literary journals and the Pink Fish Press publishing company. Brand X Pictures/Brand X Pictures/Getty Images. Different areas provide different chemicals for killing garden insects, while other chemicals are banned in some locations, so consult a local garden center, nursery or extension service for details regarding your aphid-control options. Syringae. 2008, North Dakota State University; Questions on Lilacs; Ron Smith. Apply fungicides to lilacs that have curled leaves; fungal diseases such as powdery mildew spread until they cover the entire plant and sometimes lead to the death of the lilac. She has contributed to numerous online and print publications, including "The North Central Review." You can apply horticultural oils, neem oil and jojoba oil any time the ambient air temperature is below about 90 degrees Fahrenheit, provided your lilac doesn't have a reaction to a test spot placed on its foliage about 48 hours prior to application. Longer-standing infestations may cause leaves to die and drop early. Curling leaves are an early symptom followed by white, mold-like growth covering the leaves and flowers. Removing severely damaged branches helps slow the spread of the disease and encourages new lilac growth to emerge, which helps restore the plant's health.

Samantha Volz has been involved in journalistic and informative writing for over eight years. Eventually, the leaves turn brown and black and fall off the bush. Curled leaves are less able to photosynthesise, which weakens the entire lilac bush and makes it more susceptible to further damage from pests and diseases. What Causes Brown Edges on Apple Tree Leaves? Shakespeare memorialized the sweet smell of the rose, but obviously he hadnt so much as sniffed a lilac, the undisputed perfumed queen of the spring. Bailey Shoemaker Richards is a writer from Ohio. You can also attempt to move the lilac to a sunnier, more open location once it goes dormant, but this can be a difficult task if the plant is large. © Copyright 2020 Hearst Communications, Inc. Hemera Technologies/Photos.com/Getty Images. It is also important to apply dormant horticultural oils in the early spring to kill any remaining eggs from the previous season and prevent further infestations from occurring. Since 2010, she's written on a wide range of personal finance topics. She holds a bachelor's degree in English literature from Lycoming College, Williamsport, Pennsylvania, with a minor in European history. Lilac bushes with curled leaves are suffering from a serious health problem that can affect continued flower production and the longevity of the plant. Why Are the Leaves Turning Brown on Holly Bushes? Applying pesticides to control leafminers is important for protecting the leaves of the lilac bush.

High heat and humidity, overwatering, lack of sunlight and closely spaced plants all lead to the development and spread of powdery mildew among lilacs.
Many types of powdery mildew only cause vague symptoms, including curled or distorted leaves, long before the characteristic white powdery fungal bodies appear, making early identification tricky. The leaves on all of the lilacs are turning brown at the edges and curling upward. Fungicides formulated to control powdery mildew help kill the fungal spores and stop the spread of the disease.

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