320 Hamlin on Carrizo trees in CREC Block 8 were treated with biochar and a mix of Harrell’s UF controlled release fertilizer and the Schumann TigerSul blend (iron/zinc/manganese in sulfate form). These trees are 100% HLB infected and also show blight and Diaprepes damage. Trees were topworked with potentially more HLB-tolerant scions by commercial topworking expert Jeremy Murdock. Topworking was completed in mid-March, and trees will be unwrapped and cut on April 21st. Topworked trees were mapped according to the scion. Scions included: 1. C4-16-12; 37 trees (triploid hybrid orange with 8% trifoliate orange, showing no HLB) 2. OLL-4; 40 trees (only OLL at Alligator still showing no HLB) 3. OLL-6; 34 trees 4. OLL-7; 23 trees 5. OLL-10; 20 trees 6. OLL-3; 29 trees 7. OLL-23; 22 trees 8. OLL-27; 20 trees 9. FG 2014 #1; 11 trees 10. FG 2014 #2: 10 trees 11. FG 2014 #3; 8 trees 12. Vernia C2-4-3; 7 trees 13. Valencia N7-3; 10 trees 14. Valencia N7-11; 8 trees 15. Hamlin T8-49; 10 trees 16. Valencia control; 8 trees; 17. red grapefruit N11-7; 7 trees 18. red grapefruit N11-15; 6 trees 19. red grapefruit N11-29; 1 tree