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Plant host Pest species Degree of control Buxus sempervirens (English Boxwood) Psylla buxi (Boxwood psyllid) Excellent Cornus florida (Flowering Dogwood) Pulvinaria innumerabilis (Cottony maple scale) Excellent Euonymus europaea (Tree Euonymus) Yponomeuta multipunctella (Euonymus webworm) Excellent Gleditsia triacanthos (Honey Locust) Diaphanocoris chlorionis (Honeylocust plantbug) Excellent Macropsis fumipennis (Leafhopper) Excellent Larix decidua (Larch) Adelges laricis (Wooly larch adelgid) Excellent Pinus mugo (Mugo Pine) Neodiprion sertifer (European pine sawfly) Excellent Platanus occidentalis (American Plane Tree) Corythucha ciliata (Sycamore lacebug) Excellent Plagiognathus albatus (Sycamore plantbug)* None Quercus robur (English oak) Asterolecanium variolosum (Golden oak scale) Excellent Salix babylonica (Weeping Willow) Plagiodera versicolora (Imported willow leaf beetle) Poor Sophora ļaponica (Japanese Pagodatree) Eulecanium cerasorum (Calico scale) Excellent ↵* adults only