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D. citri stunts and twists young shoots, so that the growing tips present a rosetted appearance. Leaves are badly curled, and may be covered with honeydew and sooty mould; leaves drop prematurely.
Chemical Control
Due to the variable regulations around (de-)registration of pesticides, we are for the moment not including any
specific chemical control recommendations. For further information, we recommend you visit the following resources:
The main economic importance of D. citri is as the vector of the very serious citrus huanglongbing (greening) disease caused by the bacterium Liberibacter asiaticus (EPPO/CABI, 1996a). In addition, D. citri typically causes defoliation and dieback. Serious damage to growing points can occur, which can lead to dwarfing as well as lack of juice and taste in fruit. Heavy D. citri populations can cause blossom and fruitlet drop. The honeydew excreted by D. citri promotes the growth of sooty mould which not only affects the photosynthetic activity of the tree but also attracts ants which fend off natural enemies of D. citri, resulting in additional pest damage.
