A Review of the Citrus Greening Research and Development Efforts Supported by the Citrus Research and Development Foundation

Huanglongbing (HLB) or citrus greening, first observed more than a hundred years ago in Asia, is the most serious disease threat to the citrus-growing industry worldwide due to its complexity, destructiveness, and incalcitrance to management. First detected in Florida in 2005, HLB is now widespread in the state and threatens the survival of the Florida citrus industry despite substantial allocation of research funds by Florida citrus growers and federal and state agencies. As the HLB epidemic raged in 2008, Florida citrus growers began allocating funds for HLB research in hopes of finding short-, medium-, and long-term solutions. This effort created the Citrus Research and Development Foundation (CRDF), an organization with oversight responsibility for HLB research and development efforts in Florida. This report provides an independent review of the portfolio of research projects that have been or continue to be supported by the CRDF. It seeks to identify ways to retool HLB research?which, despite significantly increasing understanding of the factors involved in HLB, has produced no major breakthroughs in controlling the disease?and accelerate the development of durable tools and strategies that could help abate the damage caused by HLB and prevent the possible collapse of the Florida citrus industry. Table of Contents Front Matter Executive Summary Summary 1 Introduction 2 Current Knowledge on Huanglongbing (HLB) and the Interactions of the Pathogen, Vector, and Host 3 HLB Research and Development Efforts 4 Notable Outcomes, Pitfalls, and Future Directions Appendix A: Committee Biographies Appendix B: Open Session Meeting Agendas Appendix C: Glossary Appendix D: Selected Citrus Research Development Foundation Projects