The objective of this project is to evaluate methyl salicylate dispensers to determine whether their deployment in citrus can enhance biological control of Asian citrus psyllid. Locations were selected for the field trials with the commercially available methyl salicylate (MeSA) lure, Predalure (AgBio Inc.; Denver, CO). Our initial initial proof of concept research in a small plot setting evaluating the effect MeSA dispensers in small plots (35 tree) provided positive results. The treatments compared were plots treated with MeSA versusuntreated control plots; all treatments were replicated five times. Two dispensers were deployed per tree in April and populations of psyllids and their natural enemies were monitored through September. These data indicated that treatment of citrus plots with MeSA,increased populations of natural enemies such as beetle and fly predators of ACP and well as the ACP parasitoid, Tamarixia radiata. In addition, populations of ACP were lower in MeSA-treated plots compared with untreated controls. However, subsequent large-scale experiments in commercial groves did not reproduce the same results. During the 2010 season, psyllid populations did not increase in the spring and early summer as in previous years in the citrus locations investigated, perhaps due to a combination of effective area wide management of psyllids with insecticides. Similarly, the low number of psyllids present in our study sites may have caused similarly low numbers of beneficial organisms captured in sweep net samples and sticky traps. Although MeSA may have initially attracted beneficial organisms, when suitable hosts were not found, they may have left our field plots. We are still processing samples from 2010 and thus have asked for a short extension of this project. The remainder of our samples need to be processed for us to conclude whether MeSA had an impact on psyllid populations and populations of beneficial organisms in our trials this year.