Lauritrioza

Lauritrioza is a monotypic genus of sap-sucking Psyllid bugs in the family Triozidae. The single species Lauritrioza alacris creates galls on the leaves of Laurus species: mostly in Europe, including the British Isles, but also introduced to western N. America.

Description of the gall

Lauritrioza alacris causes the edges of leaves to thicken and roll downwards forming pale, elongated pouches. The galls can house two generations in a summer, of up to thirty pale-green nymphs, which are covered in a white wax. Adults can also be found in the gall. The adults usually overwinter in leaf litter but can also spend the winter in the gall. Species of Laurus galled include the Azores laurel, bay tree, Laurus novocanariensis and Persea indica.