What's eating my trachycarpus latisectus?

Trachycarpus latisectus (Windamere Palm) is a rare, relatively vigorous outdoor fan palm with modest pest pressure. Scale insects are the most consistent threat, appearing on fronds and petioles. Spider mites can flare in dry summers. In UK container culture, vine weevil grubs may attack roots. Routine inspection and prompt treatment prevent serious harm.

Hard or soft bumps on fronds; leaves yellow and weaken; sooty mould follows honeydew deposits Remove manually; apply horticultural oil spray every 2 weeks; systemic insecticide for severe infestations

Stippled, bronze-tinged leaflets with webbing on undersides during hot, dry spells Increase irrigation and humidity around the palm; spray neem oil or miticide weekly until resolved

Grubs destroy roots of pot-grown specimens, causing sudden wilting; adults notch leaf edges Use Steinernema kraussei nematodes in late summer/early autumn on moist compost; inspect roots when repotting