Classical biological control of sap-suckers in Eucalyptus plantations.

ABSTRACT.- Among the most important sap-sucking insect pests (Hemiptera) of eucalypts are psyllids (Sternorrhyncha) and true bugs (Heteroptera). Damage inflicted to
trees by these insectsmay include significant leaf area loss, to weakening or tree death. High pest populations may affect a significant proportion of trees within commercial
stands, leading to large losses in forest productivity. Among the more than 400 species of Australian Hemiptera associated with eucalypts, eight psyllid species and