As we approach the end of our third year of evaluating the Boyd cocktail of macro-nutrients, micro-nutrients, phosphite, SARs, and hydrogen peroxide we are collecting data that is showing the importance of macro and micro-nutrients, and the phosphite. The ‘Hamlin’ trial was harvested in January and yield results will be available for the next report. The two ‘Valencia’ trials will be harvested in April. The rehabilitation trial begun this year to evaluate the value of buckhorning existing HLB declining trees to rebalance the shoot/root ration and applying foliar nutrients to the regrowth has gotten a lot of interest from growers. The idea of of salvaging existing trees over removal, replanting, and bringing a new planted tree into production has a lot of advantages. One advantage is the cost and another is having the tree out of production only one or two years. Another advantage is having a tree with vigorous regrowth and fully productive canopy. Growth measurements of shoot length and leaf size of the regrowth have shown shoot length to be twice the length of unpruned trees receiving the same nutrients on every flush during the first year. The pruned trees have reached more than half their original height and tree volume in one growing season. Leaf nutrient analysis data has been collected to monitor the status of the vigorous growing trees. The trees in both the Boyd cocktail trials and the rehabilitation trial all look good considering the leaf drop experienced this past October statewide in groves. In addition, we have experienced similar leaf and fruit drop from the freezes in December that other growers have had. We have documented greater leaf and fruit drop from HLB infected trees where the added stress makes the trees more susceptible. HLB makes the citrus tree less tolerant to any stress factor like drought, poor nutrition, freezes, disease, insects, etc., and can result in leaf and fruit drop. We are in the third year of a replicated experiment in a 12-acre experiment commercial block of 8-year-old ‘Valencia’ oranges on ‘Swingle’ to test effects of micro-nutrients + systemic acquired resistance inducers, and Asian citrus psyllid (ACP) chemical control on ACP populations on Can. Libericacter asiaticus (CLas) titer, and plant yield. Since our last report we have conducted two dormant sprays on the treated plots. We are conducting preparation for the third harvest in these plots possibly towards the end of March beginning or April 2011. This third harvest is considered to be key to confirm the observed tendencies from years past. In our last harvest, trees in plots where ACP was managed using insecticides produced significantly more Lb-solid per tree (5.76’0.36 Lb-solid/tree) than trees in untreated plots (4.17’0.65 Lb-solid/tree), continuing a trend seen last year. Also, trees treated with Micro+SAR produced more (5.26’0.55 Lb-solid/tree) compared with untreated trees (4.55’0.64 Lb-solid/tree), following trends seen from the first harvest in the 2008-2009 season. Neither the insecticide treatment nor the nutrients have slowd down the spread of HLB (now virtually 100%), Treatments where ACP is being managed have had consistently lower titer over the two year study, except in our May 2010 where the CT values were not different Treated (24.0’0.3), Untreated (24.1’0.2). In January we are conducting the plant samples for HLB detection. Simultaneously, we are analyzing the data from the last plant sample collection.