This is a repost from the Citrus Bugs blog and was written by Beth Grafton-Cardwell.

Following finds of several adults in yellow sticky cards in a residential area of Dinuba, young trees infested with all stages of psyllids were discovered nearby.  The fact that all stages were found and the trees were young, suggests that the trees could have been infested when they were planted and the trees possibly came from outside the San Joaquin Valley or the infestation got started near these young trees a while ago (this is being investigated).  This situation points out the need to educate everyone that they must never move...