Invited Expert Review Huanglongbing: An overview of a complex pathosystem ravaging the world’s citrus

1 Texas A&M University—Kingsville Citrus Center, Weslaco, TX 78599, USA 2 Department of Plant Pathology and Microbiology, University of California, Riverside, CA 92521, USA 3 Florida Department of Agriculture and Consumer Services, Division of Plant Industry, P.O. Box 147100, Gainesville, FL 32614, USA 4 USDA ARS National Clonal Germplasm Repository for Citrus and Dates, Riverside, CA 92507, USA 5 College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China # Retired * Correspondences: [email protected]; [email protected] Special Issue: Plant Biotic Interactions Edited by: Hailing Jin, University of California, Riverside, USA Running title: Citrus huanglongbing