Citrus Diseases Exotic to Florida: Citrus Tristeza Virus–Stem Pitting (CTV-SP)

This document is one in a series designed to provide important information on the causal agent, symptoms, and transmission of exotic citrus diseases. This information can be used as an educational tool to raise awareness about these diseases and for scouting and identification efforts. Disseminating information about the diseases to the citrus industry may prevent their introduction and spread in Florida. This document will focus on the exotic viral disease caused by isolates of citrus tristeza virus–stem pitting (CTV-SP). Original version: Chung, Kuang-Ren, and Ronald Brlansky. 2006. “Citrus Diseases Exotic to Florida: Citrus Tristeza Virus– Stem Pitting (CTV-SP)”. EDIS 2006 (7). https://doi.org/10.32473/edis-pp149-2006.

Consumers' Perceptions and Preferences toward Florida Orange Juice

Faced with reduced domestic supply, competition from imports, and high production costs, the Florida citrus industry and Florida growers need to understand how consumers perceive Florida-produced orange juice and whether they value it more than OJ produced elsewhere. We conducted a national survey to understand consumers' perceptions and confirmed that consumers have a superior perception of Florida OJ, which could lead to higher rates of willingness-to-buy and willingness-to-pay.

Steam Explosion (STEX) of Citrus × Poncirus Hybrids with Exceptional Tolerance to Candidatus Liberibacter Asiaticus (CLas) as Useful Sources of Volatiles and Other Commercial Products

Florida citrus production has declined 75% due to Huanglongbing (HLB), a disease caused by the pathogenic bacterium Candidatus Liberibacter asiaticus (CLas). Methods to combat CLas are costly and only partially effective. The cross-compatible species Poncirus trifoliata and some of its hybrids are known to be highly tolerant to CLas, and thus can potentially serve as an alternative feedstock for many citrus products. To further investigate the commercial potential of citrus hybrids, three citrus hybrids, US-802, US-897, and US-942, were studied for their potential as feedstocks for citrus co-products using steam explosion (STEX) followed by water extraction. Up to 93% of sugars were recovered. US-897 and US-942 have similar volatile profiles to that of the commercial citrus fruit types and as much as 85% of these volatiles could be recovered. Approximately 80% of the pectic hydrocolloids present in all three hybrids could be obtained in water washes of STEX material. Of the phenolics identified, the flavanone glycosides, i.e., naringin, neohesperidin, and poncirin were the most abundant quantitatively in these hybrids. The ability to extract a large percentage of these compounds, along with their inherent values, make US-802, US-897, and US-942 potentially viable feedstock sources for citrus co-products in the current HLB-blighted environment.

Guia de gestion de plagas para citricos en la Florida 2014: Interpretacion de los enunciados de PPE en las etiquetas de pesticidas

Este documento le ayuda a comprender los enunciados revisados para Equipo de Protección Personal (PPE) que ahora hacen parte de las etiquetas de los productos pesticidas utilizados en las fincas, bosques, viveros e invernaderos. This 3-page fact sheet is a Spanish-language translation of 2014 Florida Citrus Pest Management Guide: Interpreting PPE Statements on Pesticide Labels. Written by O. Norman Nesheim, Frederick M. Fishel, and Tatiana Sanchez, and published by the UF Department of Agronomy, September 2013.http://edis.ifas.ufl.edu/cg089

2021-2022 Quick Reference Guide to Citrus Insecticides and Miticides

A two-page quick reference guide to citrus insecticides and miticides recommended in the Florida Citrus Pest Management Guide, their effects on important citrus pests, and their natural enemies.

Partial Genome Sequence of a Novel Reo-Like Virus Detected in Asian Citrus Psyllid (Diaphorina citri) Populations from Florida Citrus Groves

This report describes the partial (nearly complete) genome sequence of a novel reo-like virus tentatively named Diaphorina citri Cimodo-like virus. This putative virus has 10 double-stranded RNA segments and was detected in Asian citrus psyllid ( Diaphorina citri ) populations collected from Florida commercial citrus groves.

Re-description of seven predatory mite species of family Phytoseiidae (Acari: Mesostigmata) sourced from Florida citrus groves

Predatory mites in the family Phytoseiidae (Acari: Mesostigmata) are of great importance as biological control agents of pest mites and other arthropods. Correct identification of species is crucial to implement effective biological control of target pests. Here, we provide re-descriptions of seven phytoseiid mite species collected from citrus orchards in Florida. The several important morphological features including dorsal setae lengths, dorsal solenostomes, shape of calyx of spermatheca, chelicera dentition, measurements, and shape of macrosetae on legs currently used to discriminate phytoseiid species were missing in the original descriptions and re-descriptions of these species. Additionally, we observed the presence of a previously unnoted taxonomically important character on Proprioseius meridionalis Chant. Therefore, the re-description was essential for further diagnosis of this species. Accordingly, the validity of the presence/absence of this structure as a diagnostic character to separate species groups in the genus Proprioseius should be re-considered. Furthermore, Typhlodromalus peregrinus, a species for which a series of morphological variations are reported in previous descriptions, is re-described and illustrated from Clermont, Florida, a location very close (10 km) to its type location (Minneola), and the leaves of type host citrus. The macrosetae StIV was knobbed apically in all our specimens of T. peregrinus indicating invalidity of sharp-pointed or knobbed StIV to separate this species from a closely related species, T. aripo De Leon. These re-descriptions and species are important to utilizing authentic and promising candidates for biological control.

2021–2022 Florida Citrus Production Guide: Blight

Reviewed March 2021. There are no changes in recommendation from 2020.