Citrus psylla

Huanglongbing (HLB), also known as the “greening disease” is a serious disease affecting major citrus growing groves in India as well as in the world. The presumptive causal agent is a fastidious, gram negative, α- subdivision of the proteobacteria named Candidatus Liberibacter asiaticus (CLas) transmitted by Asian citrus psylla (Diaphorina citri).

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The citrus psyllid, Diaphorina citri Kuwayama, is the most important pest of citrus worldwide because it serves as a vector of Candidatus Liberibacter species that cause citrus greening disease. The nymphs and adults suck cell sap causing curling of leaves, defoliation, flower drop and death of branches from t to downwards which is known as die back. The peak population found usually in March-April and August-September.

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