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KAC Citrus Entomology
University of California
KAC Citrus Entomology


Psyllid Identification

Look closely at the psyllid wings.  The edges of the wings are brown with a clear break in the pattern.  This is the best way to recognize ACP compared to other small insects. This printable pdf file will show you photos of all stages of the psyllid. Recognizing ACP stages

Yellow sticky cards

Yellow sticky card Citrus Research Board
Yellow sticky cards are used by the California Department of Food and Agriculture and the Citrus Pest and Disease Prevention Program to trap adult psyllids flying about citrus trees.  The traps are more attractive when there isn't any new young flushing leaves on the tree to distract the psyllids. 

ACP Sampling methods for PCAs and growers

See the ACP Distribution and Management Website for instructions on how to sample for ACP.  

Visual search of new flush

The best way to find psyllids is to examine tiny new leaves as they are developing and look for signs of adult psyllids or the nymphal stage with its waxy tubules.  The adults must lay their eggs in new flush.

Inspect trees for psyllids every time you see new leaf flush
Inspect trees for psyllids every time you see new leaf flush
Nymphs with waxy tubules
Nymphs with waxy tubules

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