Cookies on Plantwise Knowledge Bank

Like most websites we use cookies. This is to ensure that we give you the best experience possible.

Continuing to use www.plantwise.org/KnowledgeBank means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use.

Plantwise Knowledge Bank
  • Knowledge Bank home
  • Change location
Plantwise Technical Factsheet

Asian citrus psyllid (Diaphorina citri)

Host plants / species affected
Citrus
Citrus aurantiifolia (lime)
Citrus latifolia (tahiti 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:
- PAN pesticide database (www.pesticideinfo.org)
- Your national pesticide guide

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.

Related treatment support
Plantwise Factsheets for Farmers
Hasnain, M.; CABI, 2012, English language
Hasnain, M.; CABI, 2012, Urdu language
Thipse, C. D.; CABI, 2012, Tamil language
Thipse, C. D.; CABI, 2012, English language
 
Pest Management Decision Guides
UK, CABI; CABI, 2014, Spanish language
UK, CABI; CABI, 2014, English language
León González, R.; Vicente Orozco, J.; Soto, G.; CABI, 2014, Spanish language
 
External factsheets
USDA-NAL National Invasive Species Information Center Species Profiles, USDA-NAL National Invasive Species Information Center (NISIC), 2012, English language
Pestnet Factsheets, Pestnet, English language
DPI NSW factsheets, New South Wales Government, Department of Primary Industries, Australia, 2012, English language
DPI NSW factsheets, New South Wales Government, Department of Primary Industries, Australia, 2012, English language
Pestnet Factsheets, Pestnet, English language
Zoomed image