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Species Page

Asian citrus psyllid

Diaphorina citri

Distribution

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Host plants / species affected

Main hosts

show all species affected
Citrus
Citrus aurantiifolia (lime)
Citrus limon (lemon)
Murraya koenigii (curry leaf tree)

List of symptoms / signs

Fruit - abnormal shape
Growing point - dieback
Growing point - distortion
Leaves - abnormal forms
Leaves - abnormal leaf fall
Leaves - honeydew or sooty mould
Leaves - honeydew or sooty mould

Symptoms

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.

Prevention and control

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:


This information is part of a full datasheet available in the Crop Protection Compendium (CPC);www.cabi.org/cpc. For information on how to access the CPC, click here.

Impact

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.