An experiment was designed and setup for Objective 3,�Effect of Fe2+ and citric acid treatment on HLB titer of model HLB system determined.� The experiment tests F11, a high Fe2+ product sold only in Japan and which was developed from Patent US 8,945,631,�Liquid for treatment of citrus greening disease and treatment method using same.� Greenhouse-grown citron plants propagated from HLB-infected citron were tested by RT-PCR. Twenty-two plants that tested positive and showed HLB symptoms were divided into two groups with eleven plants in each group.� The plants are growing in Ruck’s pots.� One group is being treated with F11 + Siltrate, and one group is being treated with Siltrate only and serves as the control group.� F11 is foliar and soil applied at 150 ppm Fe weekly.� For soil application 40 mls is added to each pot.� Siltrate Advanced (Meherrin Inc., Severn, NC), is a nonionic siloxane surfactant, and is used at 1.3 ml/L.� The experiment was interupted by the Federal Government shutdown and plants were not treated.� The plants were cut back to 25 cm, cuttings weighed, and treatments resumed.� Plants will be treated for 6 months.� A similar experiment will be setup using Treatment solution B as described in Patent US 8,945,631.� Treatment solution B is a high Fe2+ formulation that includes FeSO4.7H2O and citric acid.�The subcontractor is running the field experiments and received his funding last week (week of February 25th) from USDA, ARS.� Trees were ordered and have been planted (12/19/18) for Objective 7,�Determine the effect of Fe2+ + organic acid solutions on newly planted (<2 years old) field trees.� ����