What Is Wrong With My Azaleas?
Lace bug damage on azaleas is a common issue caused by tiny insects known as lace bugs (family Tingidae). These pests are typically found on the undersides of azalea leaves, where they feed on the plant sap by piercing the leaf tissue with their mouthparts. The damage inflicted by lace bugs can affect the appearance and health of azalea plants. Here are some signs and symptoms of lace bug damage on azaleas:
Pale or Whitish Spots: Lace bugs extract chlorophyll from the leaves, resulting in small, pale or whitish spots on the upper leaf surface. These spots may appear as a stippled or mottled pattern.
Discolored Leaves: Infested leaves often exhibit yellowing or bronzing, primarily on the upper surface. The discoloration may spread, causing the leaves to turn brown or develop a scorched appearance.
Black Tar-Like Droppings: Lace bugs excrete dark, sticky droppings called frass. These droppings accumulate on the lower leaf surface, creating a characteristic black or dark brown speckled appearance.
Fine Webbing: In severe infestations, lace bugs may produce fine silk webbing on the undersides of leaves, which can be observed upon closer inspection.
Premature Leaf Drop: Intense lace bug feeding can weaken the azalea plants, leading to premature leaf drop. This can result in a thinning canopy and reduced overall vigor.
To confirm lace bug infestation, you can inspect the undersides of azalea leaves for the presence of the insects themselves. Lace bugs are small, about 1/8 inch long, and have a transparent, lace-like pattern on their wings, which gives them their name.
If you suspect lace bug damage on your azaleas, there are several control measures you can take. These include:
Regularly inspecting plants for lace bugs and their eggs.
Pruning and removing heavily infested leaves.
Encouraging natural predators such as ladybugs and lacewing larvae.
Applying insecticidal soap, horticultural oil, or botanical insecticides labeled for lace bugs, following the instructions carefully.
It's advisable to consult with a professional arborist for specific recommendations and guidance on managing lace bug infestations in your area.
