Linden Tree Disease

Written by elton dunn
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Linden Tree Disease
(Hemera Technologies/ Images)

Linden trees may experience several fungal diseases as well as insect damage.

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Powdery Mildew

An outbreak of powdery mildew causes a linden tree to develop small white dots over its bark, leaves and shoots. Wet weather and humidity cause this disease, which can be treated with a fungicide.

Black Mold

Linden trees with an aphid infestation will develop black mould, which grows on the slimy waste called "honeydew," which these pests produce. The black mould goes away when the tree is treated with an insecticidal soap or other aphid-relief products.

Leaf Spot

Trees affected with leaf spot display brown or black lesions on the leaves. If fallen leaves aren't raked up and disposed of, and if the tree is not treated with fungicide, the leaf spot will return the following year.


Many insects prey on the linden tree, including the Japanese beetle, leaf beetle, mulberry whitefly, linden borer, aphid and fall webworm. Most insect problems can be treated with insecticidal soap or chemical sprays.


For fungal infections that cause linden tree diseases, humid weather and damp spring weather are the predominant causes. Fungal diseases may also occur when a linden tree is in poorly draining soil.

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