Asian Citrus Psyllid--An Invasive Threat to Texas Citrus

Julian W. Sauls, Ph. D.
Texas Cooperative Extension

The Asian citrus psyllid is a very efficient vector of Asian citrus greening disease which was discovered in Florida in August, 2005, and has been confirmed in over 30 Florida counties. This disease is deadly to all citrus trees, without regard to rootstock or scion variety.

The psyllid was first identified in the Lower Rio Grande Valley of Texas in the summer of 2001 and has since spread to 32 counties--mostly from Houston west to Del Rio and south to the Valley. In late 2007, both the USDA and the Texas Department of Agriculture imposed quarantines on the 32 Texas counties where the psyllid has been found. The quarantines require special insecticidal treatments for any citrus trees, plants or budwood before such materials can be transported from any quarantined county to any non-quarantined county in the state. None can be exported to any other citrus-producing state, regardless of insecticidal treatment.

I hope to include a listing of the quarantined counties as well as a state map highlighting those counties in the very near future. Meanwhile, below are a series of images showing various aspects of the Asian citrus psyllid. Click on any one to see a full-screen image as well as logo and credits for the image.

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This page created and maintained by Julian W. Sauls, Ph. D

Updated April 24, 2008