Leptoglossus zonatus feeds on the satsuma mandarin by inserting its piercing-sucking mouthparts in the fruit and releasing a toxic substance. It transmits a trypanosomatid plant pathogen similar to the one that causes Chagas’ disease and sleeping sickness in humans, but that is only pathogenic to plants. This 4-page fact sheet was written by Amelio A. Chi and Russell F. Mizell III, and published by the UF Department of Entomology and Nematology, June 2012.
http://edis.ifas.ufl.edu/in935
Category: Citrus
Japanese Orange Fly, Bactrocera tsuneonis (Miyake) (Insecta: Diptera: Tephritidae) (EENY263/IN542)
This fruit fly is one of the most important pests of citrus in Japan. There have been no interceptions of the Japanese orange fly in the United States, probably due in a large part to the protection provided by a U.S. embargo of long standing against citrus from the orient. There have been some efforts recently to effect the removal of this embargo in order that citrus from Japan might be exported to the U.S. If this were to be done, the danger of introducing the Japanese orange fly into the U.S. would be greatly increased. This 2-page fact sheet was written by H. V. Weems, Jr. and T. R. Fasulo, and published by the UF Department of Entomology and Nematology, March 2012.
http://edis.ifas.ufl.edu/in542
Outbreaks of Foodborne Disease Associated with Fruit and Vegetable Juices, 1922 to 2010 (FSHN1204/FS188)
The FDA has recently mandated that all 100% fruit/vegetable juices sold wholesale be produced under a Hazard Analysis and Critical Control Point (HACCP) plan. As part of their HACCP plan, juice processors must identify and meet a target for reduction of the most resistant microorganism of public health significance that is likely to occur in the juice. This 7-page fact sheet aids juice processors in the identification of these “pertinent microorganisms,” and reviews the locations of juice preparations and severity of juice-associated outbreaks. Written by M. D. Danyluk, R. M. Goodrich-Schneider, K. R. Schneider, L. J. Harris, and R. W. Worobo, and published by the UF Department of Food Science and Human Nutrition, January 2012.
http://edis.ifas.ufl.edu/fs188
Mexican Fruit Fly, Anastrepha ludens (Loew) (Insecta: Diptera: Tephritidae) (EENY201/IN358)
The Mexican fruit fly is a very serious pest of various fruits, particularly citrus and mango, in Mexico and Central America. Its natural distribution includes the Rio Grande Valley of Texas, where populations routinely attain pest status if control measures are not practiced. It is a frequent invader in southern California and Arizona. Mexican fruit fly represents a particular threat to Florida because of its special affinity for grapefruit, of which Florida is one of the world’s leading producers. Mexican fruit fly larvae are transported widely in infested fruits. This 6-page fact sheet was written by H. V. Weems, Jr, J. B. Heppner, G. J. Steck, T. R. Fasulo and J. L. Nation, and published by the UF Department of Entomology and Nematology, January 2012.
http://edis.ifas.ufl.edu/in358
Citrus Diseases Exotic to Florida: Citrus Yellow Mosaic (PP293)
Citrus yellow mosaic is an important viral disease in India, where it causes significant yield reduction. In some groves, infection rate may be as high as 70%. CYMV induces a bright yellow mottling or vein flecking that persists in mature leaves. Yields are sharply reduced in chronically infected ‘Sathgudi’ sweet orange trees in India, and fruit may also show mosaic symptoms. This 2-page fact sheet was written by K.-R. Chung and R. H. Brlansky, and published by the UF Department of Plant Pathology, February 2012.
http://edis.ifas.ufl.edu/pp293
Citrus Diseases Exotic to Florida: Mal Secco (PP290)
Mal secco, Italian for “dry disease”, is a fungal disease that causes serious damage to a number of citrus cultivars in the Mediterranean and Black Sea areas, but has not been reported in other citrus-growing regions. The main diagnostic field symptom is that wood of affected limbs has a reddish-yellow stain. This 3-page fact sheet was written by K.-R. Chung, and published by the UF Department of Plant Pathology, February 2012.
http://edis.ifas.ufl.edu/pp290
Citrus Diseases Exotic to Florida: Satsuma Dwarf (PP291)
Satsuma dwarf is a virus disease that was first reported in the early 1930s in Japan. The disease causes serious problems in citrus because it reduces tree vigor and fruit yield. Satsuma dwarf has also been reported in mandarin-growing areas in China, Korea, and Turkey, where it was likely introduced through importation of infected budwood from Japan. This 2-page fact sheet was written by K.-R. Chung and R.H. Brlansky, and published by the UF Department of Plant Pathology, February 2012.
http://edis.ifas.ufl.edu/pp291
GAPs for the Florida Citrus Grower: Understanding the Principles of Good Agricultural Practices (FSHN1203/FS187)
Growers are the first step in the farm-to-table food chain. Good Agricultural Practices (GAPs) refer to practices growers follow to prevent, minimize, or eliminate contamination and hazards to human health. Essential components of the GAPs process include careful planning, implementation, and documentation of required steps and procedures that together analyze and minimize risks imposed by biological, chemical, and physical hazards. The general guidelines presented in this document were developed by UF/IFAS for Florida citrus growers, in partnership with the citrus industry. This 8-page fact sheet was written by Michelle D. Danyluk, Renée M. Goodrich-Schneider, Keith R. Schneider, Mark A. Ritenour, and Timothy M. Spann, and published by the UF Department of Food Science and Human Nutrition, February 2012.
http://edis.ifas.ufl.edu/fs187
How to Characterize Soil Variability in Florida Citrus Groves as It Relates to Tree Growth and Yield (SL556/SS557)
Non-uniform tree growth and fruit yield are very common throughout many Florida citrus groves, but variable groves are typically managed as if they were uniform. This 4-page fact sheet provides information about the relationship between soil variability and citrus production, proposes recommendations for soil sampling that account for spatial variability, and suggests site-specific management practices for variable Florida citrus groves. Written by Kirandeep K. Mann, Arnold W. Schumann, Thomas A. Obreza, Willie G. Harris, and Jerry B. Sartain, and published by the UF Department of Soil and Water Science, January 2011.
http://edis.ifas.ufl.edu/ss557
Economic Impacts of Citrus Greening (HLB) in Florida, 2006/07-2010/11 (FE903)
Since 2006, the bacterial disease citrus greening has cost Florida’s economy an estimated $3.636 billion in lost revenues and 6,611 jobs by reducing orange juice production, according to the study reported in this 5-page fact sheet written by Alan W. Hodges and Thomas H. Spreen and published by the UF Department of Food and Resource Economics, January 2012.
http://edis.ifas.ufl.edu/fe903
UF/IFAS press release: http://news.ufl.edu/2012/01/24/greening-cost/
A Web-Based Tool for Timing Copper Applications in Florida Citrus (PP289)
The Citrus Copper Application Scheduler provides citrus growers with an easy-to-use tool to guide copper application decisions. It is an updated version of a previous copper residue model This 4-page fact sheet was written by Megan M. Dewdney, Clyde W. Fraisse, Tiago Zortea, and Jamie Burrow, and published by the UF Department of Plant Pathology, January 2012.
http://edis.ifas.ufl.edu/pp289
An Asian Citrus Psyllid Parasitoid: Diaphorencyrtus aligarhensis (Shafee, Alam and Agarwal) (Insecta: Hymenoptera: Encyrtidae) (EENY505/IN907)
This 5-page fact sheet describes this imported biological control agent to combat the Asian citrus psyllid, a serious pest of citrus. Written by Eric Rohrig, and published by the UF Department of Entomology and Nematology, November 2011.
http://edis.ifas.ufl.edu/in907
Citrus Diseases Exotic to Florida: Powdery Mildew (PP288)
Powdery mildew, which affects almost all citrus cultivars, is a common fungal disease problem in Asian countries. This 2-page fact sheet provides background information for this disease to provide a basis for evaluating potential risk to Florida citrus and for aiding decision-making to prevent its introduction and spread in Florida. It was written by K.-R. Chung and published by the UF Department of Plant Pathology, October 2011.
http://edis.ifas.ufl.edu/pp288
Reclaimed Water Use for Edible Crop Production in Florida (SL360/SS561)
Irrigating edible crops with reclaimed water is a promising, cost-effective solution to Florida's overuse of freshwater resources. Learn more in this 4-page fact sheet written by Jamie Lewis and Alan L. Wright and published by the UF Department of Soil and Water Science, September 2011.
http://edis.ifas.ufl.edu/ss561
Field Identification of Citrus Canker Symptoms and Decontamination Procedures (PP214/PP136)
Citrus canker, caused by the bacterial pathogen Xanthomonas citri subsp. citri, is a serious disease of citrus. The disease causes necrotic dieback, general tree decline, premature fruit drop, and fruit blemishes. Severely infected trees become weak, unproductive, and unprofitable. Learn how to identify citrus canker and proper procedures for decontamination with this 5-page fact sheet written by Mongi Zekri, Megan Dewdney, Jamie Yates, and Pamela Roberts, and published by the UF Department of Plant Pathology, July 2011.
http://edis.ifas.ufl.edu/pp136
Personal Protective Equipment (PPE) Reference Guide for Low-Volume Ground Citrus Applicators (CH203)
This 2-page fact sheet provides a table describing personal protective equipment requirements for several products used in citrus production. Written by S.H. Futch, L.L. Stelinski, M.E. Rogers, and J.D. Yates, and published by the UF Department of Horticultural Sciences, July 2011.
http://edis.ifas.ufl.edu/ch203
Identification of Early Citrus Black Spot Symptoms (Identificacíon de los Síntomas Iniciales de la Mancha Negra de los Cítricos) (PP285)
This bilingual identification sheet was designed to assist packinghouse employees to identify the early yet subtle symptoms of citrus black spot. Proper identification of citrus black spot prevents the rejection of international fruit shipments. Written by M. M. Dewdney, J. D. Yates, and M. A. Ritenour and published by the UF Department of Plant Pathology, July 2011.
http://edis.ifas.ufl.edu/pp285
Application of Auto-steering Technology for Tree Planting (AE475)
Setting up new orchards or planting new trees on existing beds is one of those orchard operations that have not yet been fully mechanized. Auto-steering technology can be used in conjunction with a tree planting unit to mechanize this operation and reduce tree planting costs. Learn more in this 5-page fact sheet was written by Reza Ehsani and Esa Ontermaa, and published by the UF Department of Agricultural and Biological Engineering,March 2011.
http://edis.ifas.ufl.edu/ae475
The Effects of Huanglongbing on Florida Oranges (FSHN1108/FS169)
This tri-fold brochure offers commercial citrus growers and other stakeholders succinct details about the effects of HLB, and presents important facts of HLB’s history in Florida, illustrated descriptions, and details regarding HLB’s effects on fruit yield, appearance, and quality. Includes author contact information. Written by Michelle Danyluk, Timothy M. Spann, Russell Rouseff, Renée M. Goodrich-Schneider, and Charlie Sims, and published by the UF Department of Food Science and Human Nutrition, January 2011.
http://edis.ifas.ufl.edu/fs169
Quick Reference Guide to Foliar Fungicides (PP275)
This revised 2-page reference guide provides quick access to foliar fungicide recommendations from the Florida Citrus Pest Management Guide. Verso provides guidelines for fungicide resistance management. Written by M. M. Dewdney and published by the UF Department of Plant Pathology, April 2011.
http://edis.ifas.ufl.edu/pp275