Sycamore lace bug, organic treatments to control it
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Tiny whitish spots stipple the topside of plane leaves while quarter-inch bugs feed in clusters underneath, until the foliage blackens and drops. The sycamore lace bug (Corythucha ciliata) is a sap-sucking stink bug that can devastate a plane tree; reach the trunk and main branches with a pressure spray of rapeseed oil and the pests are dislodged and suffocated.
It is actually a stink bug that comes to “suck” the sap from the underside of leaves.
Symptoms of lace bug on plane trees
Tiny spots coalesce and cluster along the leaf veins
Whitish and blackish blemishes appear and the leaves fall off. Spots are tiny but coalesce. They’re often grouped near leaf veins.
Tiny quarter-inch (3mm) bugs feed in clusters on the underside of leaves.
Solution to treat against the sycamore lace bug
Rapeseed oil, pressure-sprayed, dislodges and suffocates the bugs
Spraying an insecticide is a well-known method and it is the most effective one.
But to protect our planet, there is a method that derives from organic gardening.
Simply pressure-spray the trunks and structural branches of your plane tree with rapeseed oil to dislodge and suffocate the insect pests.
Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.
