Objective 1. (Greenhouse experiment): qPCR analysis was completed on all trees to determine CLas titers, and results were received from the Southern Gardens Diagnostic Laboratory. Surprisingly, 44 trees tested negative for CLas, mostly from WGFT+50-7, UFR-3, X639 and Swingle, especially with treatments 5 &6. This suggests that over time, slow release of strong micro-nutrient packages can have a therapeutic effect. Trees have been trimmed and made ready for field planting in the spring, in a possible collaboration with AllTech via Ed Dickinson (and will require a DPI permit). Objective 3: To evaluate the effect of complete, balanced and constant nutrition on HLB-affected mature trees (composition, delivery and economics). In this time period, we did final the final round of fertilization (3rd application). We also collected the final tree health data for 2018 including leaf nutrient analysis. The results with some treatments/locations showing yield and fruit quality improvements, were presented to CRDF board meeting in October 2018. Results were also presented at Nutrition day in December, which was followed by the field day at the Fort Meade trial location. Field day was very well received by growers and grower feedback was very good. Objective 5. (funded by Lee Groves, using donated fertilizer products): Alligator Vernia/Rough Lemon Enhanced Nutrition Experiment � Treatments: 6 tree plots (randomized), 2 plots per treatment � treatments 2 times per year. Positive results showing a therapeutic affect from overdoses of manganese against HLB were presented at the annual ASHS meeting in Washington DC, and a manuscript has now been accepted for publication in HortScience pending acceptable revisions.