The genus Eucalyptus (family Myrtaceae), predominantly a native of Australia, is the most widely planted hardwood timber species in the world. The trees, moved around the globe as seeds, escaped the diverse community of herbivores found in their native range. However, a number of herbivore insect species from the native range of Eucalyptus have invaded many Eucalyptus-growing regions. The present review deals with insects associated with the genus Eucalyptus in India and abroad. Eucalyptus has a very rich insect pest complex of about 400 insect species, comprising chiefly of 160 species of foliage feeders, 110 species of xylophagous borers, 76 species of sapsuckers, 32 species of timber borers and 22 species of miscellaneous insects. In India, like other exotics, Eucalyptus also suffers in varying degree, from light to heavy mortality due to insect attack. Some of the native phytophagous pests, because of prolonged ecological association with Eucalyptus, over the years, have developed fancy for this exotic and have adopted Eucalyptus as a favourable hosts. As of today, about 70 species of insects have been found associated with different species of Eucalyptus in India causing debility/injury in varying degree. Perusal of literature reveals that 920 species of insects associated with Eucalyptus which is world total, including those from the temperate region.

Key words: Eucalyptus, insect fauna, native and exotic insects