April 2019�The objectives for this proposal are 1) Conduct ground and aerial applications of fungicides to determine the efficacy and economics of fungicide treatments; 2) Determine if Luna Sensation has enough systemic activity to protect flowers from before they fully develop and open; 3) Determine if the period flowering of trees affected by huanglongbing can be narrowed to eliminate the offseason bloom that contributes to the PFD inoculum increase in groves.�In 2019, a field trial was set up and treatments were applied in a Valencia grove in Ft. Meade.� There were few predicted infection events this year and only one application was made based on the PFD-FAD or CAS model predictions.� Button counts will be collected soon now that flowering has finished.�Trees with flowers at different stages were treated in the field with Luna Sensation and branches were collected for inoculation in the lab.� The inoculations were done but the petals fell off the open flowers rapidly so it will be difficult to determine how well the open flowers were protected.�The third year of bloom synchronization was undertaken in 2019. All the foliar PGR applications were completed.� The initial preflowering button counts were done from January to March.� In January, the flower counts were started and are still underway.� Harvest of the ‘Valencia’ trees was anticipated in March, but, the grower collaborators have delayed harvest until April.� Navels were harvested and we are currently in the process of analyzing and interpreting the ‘Navel’ harvest data.��Trials were done in 2 sites on ‘Valencia’ trees in Ft. Meade and Dundee, FL to compare the model outputs for predicting infection events.� In Ft. Mead, one application per the CAS model was applied, one application per the PFD-FAD model, and three weekly applications.� In Dundee, there were no applications with the CAS, one application per the PFD-FAD model, and 2 weekly applications.� No infected flowers were found in either grove on the major blooms.� Button and fruit counts will be taken later in the year.��Finally, a manuscript is in preparation for the Citrus Advisory System (CAS).� It is approximately 50% completed and is hoped to be fully completed by the end of May.�