Citrus Greening and the Future of an Industry

Citrus Greening and the Future of an Industry

Author: Michael Ross Roka

Publisher:

Published: 2011

Total Pages: 114

ISBN-13:

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The nine billion dollar Florida citrus industry stands at a crossroad, poised at an economic precipice that, if ignored, could not only spell the end of an industry, but also significantly impact the state's economy. The above-mentioned crossroad stems from the appearance and rapid spread of the bacterial disease known as Huanglongbing (HLB) or what is commonly referred to as "citrus greening." The purpose of this paper is to examine the social and economic forces surrounding HLB and determine whether a mandatory tree eradication program is necessary. HLB is not the first threat that Florida citrus has faced over the years. The industry has encountered crises in the past in the various forms of other diseases such as the citrus tristeza virus, citrus blight, and citrus canker, as well as natural catastrophes such as hurricanes and freezes. What makes the threat of of HLB so serious, however, is that there is not only no cure to the disease, but also there is no current long-term industry-wide strategy in place to deal with this disease. If left unchecked, HLB renders a tree unproductive, and the current actions being taken to fight the disease by Florida growers are far from being universally accepted or applied. One reason behind Florida's uncoordinated response to HLB is rooted in the frustration still felt from the policies related to past attempts to eradicate citrus canker. With citrus, and particularly with respect to the production of juice oranges, costs have risen dramatically in the past few years due in large part to HLB management practices. It is crucial that a solution or at least a stopgap strategy be found to control the adverse effects from HLB. After an examination of both the economic and social forces at work behind both the disease and response to the disease, it is clear that a mandatory eradication program is necessary to combat the current crisis of HLB and safeguard the citrus industry from potential annihilation.


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

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

Author: National Academies of Sciences, Engineering, and Medicine

Publisher: National Academies Press

Published: 2018-06-29

Total Pages: 289

ISBN-13: 0309472172

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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 researchâ€"which, despite significantly increasing understanding of the factors involved in HLB, has produced no major breakthroughs in controlling the diseaseâ€"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.


Strategic Planning for the Florida Citrus Industry

Strategic Planning for the Florida Citrus Industry

Author: National Research Council

Publisher: National Academies Press

Published: 2010-04-15

Total Pages: 329

ISBN-13: 0309153352

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Citrus greening, a disease that reduces yield, compromises the flavor, color, and size of citrus fruit and eventually kills the citrus tree, is now present in all 34 Floridian citrus-producing counties. Caused by an insect-spread bacterial infection, the disease reduced citrus production in 2008 by several percent and continues to spread, threatening the existence of Florida's $9.3 billion citrus industry. A successful citrus greening response will focus on earlier detection of diseased trees, so that these sources of new infections can be removed more quickly, and on new methods to control the insects that carry the bacteria. In the longerterm, technologies such as genomics could be used to develop new citrus strains that are resistant to both the bacteria and the insect.


The Citrus Industry, Volume IV

The Citrus Industry, Volume IV

Author: Walter Reuther

Publisher: UCANR Publications

Published: 1978

Total Pages: 390

ISBN-13: 9780931876240

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A comprehensive volume on citrus diseases, biological control of insects, nematodes, and vertebrate pests, certification and registration, and regulatory measures. Color plates.


Citrus Bacterial Canker Disease and Huanglongbing (Citrus Greening)

Citrus Bacterial Canker Disease and Huanglongbing (Citrus Greening)

Author:

Publisher: UCANR Publications

Published: 2007

Total Pages: 12

ISBN-13: 1601074395

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Citrus canker and huanglongbing (HLB, or citrus greening) are two serious diseases that affect crops around the world, but have not yet infected California groves. This publication tells how to help keep the diseases out of California, and how to recognize them if or when they do arrive.


Mathematical Modeling of Citrus Greening

Mathematical Modeling of Citrus Greening

Author: Jillian Claire Stupiansky

Publisher:

Published: 2013

Total Pages: 78

ISBN-13:

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Huanglongbing (citrus greening) is a bacterial disease that has a significant impact on the citrus industry in Florida and poses a risk to the remaining citrus-producing regions of the United States. The work presented here centers around the development of a deterministic mathematical model that represents the spread of citrus greening disease within a single grove of trees. The system models both the tree and insect populations and incorporates a control strategy of roguing infected trees and replanting healthy trees. Initially, we will examine a system in which all interactions occur at a constant rate. In this case, the basic reproductive number, R[subscript small o], and its relation to the stability of the equilibria is discussed. In particular, theorems regarding extinction of the disease when R[subscript small o][less than or equal to] 1 and persistence of the disease when R[subscript small o][greater- than] 1 are proved. Variations on the rates of roguing are examined to provide insight into the effect of the control strategy on the level of healthy trees that can be maintained. A modification to the model is presented which allows for the possibility of the occurrence of a backward bifurcation. The original model is then modified to account for seasonal variation in the rate of transmission of the disease, and results pertaining to the stability of this new system are proved. Numerical studies are performed throughout to illustrate the theoretical findings. In addition, simulations of a stochastic model are explored, as this type of model may allow for the future incorporation of the economic impact of the disease.


The Genus Citrus

The Genus Citrus

Author: Manuel Talon

Publisher: Woodhead Publishing

Published: 2020-01-21

Total Pages: 540

ISBN-13: 012812217X

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The Genus Citrus presents the enormous amount of new knowledge that has been generated in recent years on nearly all topics related to citrus. Beginning with an overview of the fundamental principles and understanding of citrus biology and behavior, the book provides a comprehensive view from Citrus evolution to current market importance. Reporting on new insights supported by the elucidation of the citrus genome sequence, it presents groundbreaking theories and fills in previous knowledge gaps. Because citrus is among the most difficult plants to improve through traditional breeding, citrus researchers, institutions and industries must quickly learn to adapt to new developments, knowledge and technologies to address the biological constraints of a unique fruit-tree such as citrus. Despite the challenges of working with citrus, tremendous progress has been made, mostly through advances in molecular biology and genomics. This book is valuable for all those involved with researching and advancing, producing, processing, and delivering citrus products. Includes the most current research on citrus genomic information Provides the first detailed description of citrus origin, a new proposal for citrus taxonomy, and a redefinition of the genus Citrus Details citrus challenges including climate change, global disease impacts, and plant improvement strategies