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Horticulturae
Special Issues
Advances in Citrus Pathology and Disease Management
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Advances in Citrus Pathology and Disease Management

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Plant Pathology and Disease Management (PPDM)".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 5109

Special Issue Editors

Dr. Sheo Shankar Pandey

E-Mail Website
Guest Editor
Citrus Pathology and Bacteriology Lab, Citrus Research and Education Center (CREC), Department of Microbiology and Cell Science, Institute of Food and Agricultural Science (IFAS) University of Florida, Lake Alfred, FL 33850, USA
Interests: microbiology; plant pathology; molecular plant-microbe interactions
Dr. Dilip K Ghosh

E-Mail Website
Guest Editor
ICAR-Central Citrus Research Institute, Nagpur, Amaravati Road, Nagpur 440010, India
Interests: horticulture; plant protection; biotechnology; molecular biology; virology

Special Issue Information

Dear Colleagues,

Citrus is the one of most popular cultivated fruit types around the world. Citrus fruits play an important role in the agro economy of several countries, including China, Brazil, India and the United States. Citrus includes several economically important fruits such as lemons, limes, oranges, mandarins, tangerines, grapefruits, pomelo and many more.

Citrus cultivation and management faces multiple biotic and abiotic challenges. Citrus trees are being attacked by pathogenic bacteria (e.g., Ca. Liberibacter spp., Xanthomonas citri, Xylella fastidiosa, Spiroplasma citri, Ca. Phytoplasma aurantifolia), fungi (e.g., Phytophthora citrophthora, P. gummosis, Alternaria citri, Armillaria mellea), viruses (e.g., CTV, CTLV) and nematodes. Recent devastating outbreaks of Ca. Liberibacter asiaticus caused Huanglongbing disease in new geographical regions such as North and South America, triggering alarm among plant epidemiologists. The disease outbreak in new geographical regions is often associated with climate change. Research to help understand the biology, genetics, and ecology of citrus diseases is crucial to device disease management strategies and engineering disease-resistant plants.

Dr. Sheo Shankar Pandey
Dr. Dilip K Ghosh
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • citrus pathology
  • bacterial diseases of plants
  • viruses
  • fungal diseases
  • HLB
  • disease management

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Published Papers (3 papers)

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Research

10 pages, 2228 KiB  
Article
Phytophthora Root Rot in Rangpur Lime Cultivated in Soil Managed with Ecological and Conventional Mower
by Caio Barbosa Prates, Eduardo Feichtenberger, Rodrigo Martinelli, Biana Pelissari Gadanhoto, Fernando Trevizan Devite, Patrícia Marluci da Conceição and Fernando Alves de Azevedo
Horticulturae 2023, 9(8), 929; https://doi.org/10.3390/horticulturae9080929 - 16 Aug 2023
Cited by 1 | Viewed by 1390
Abstract
Root rot and gummosis caused by Phytophthora spp. are considered one of the most important citrus diseases in Brazil. Symptoms of Phytophthora spp. infection in citrus plants are associated with lesions on the bark at the base of the plant, roots, and even [...] Read more.
Root rot and gummosis caused by Phytophthora spp. are considered one of the most important citrus diseases in Brazil. Symptoms of Phytophthora spp. infection in citrus plants are associated with lesions on the bark at the base of the plant, roots, and even lower branches. Inappropriately performed cultural practices, such as excessive irrigation and practices that result in reduced aeration and soil drainage, favor the disease. The objective of this study was to evaluate the effect of Urochloa ruziziensis mulching provided by an ecological mower on the severity of Phytophthora nicotianae root rot and the development of citrus plants and their root system. The experiments were carried out under controlled conditions on Rangpur lime seedlings kept in pots containing soil from ‘Hamlin’ orange orchards with the use of an ecological mower or a conventional mower in the management of inter-row vegetation for six years. Urochloa ruziziensis mulching (9 t ha−1) was added or not to the pots. The inoculation of P. nicotianae in the roots occurred through infection of the soil with a solution containing mycelium and sporangia of the pathogen. A 2 × 2 × 2 factorial scheme was used, with the following factors A: soil type, B: inoculation of P. nicotianae and C: mulching of U. ruziziensis. The attributes of plant development, such as root growth, average number of leaves, leaves and dry mass of shoots and roots, in addition to assessments of the severity of disease in the roots, were evaluated. The mulch of U. ruziziensis did not promote an increase in root rot. The soil resulting from this management promoted the better development of Rangpur lime plants. Therefore, vegetation management of inter-row with an ecological mower is not associated with increased symptoms of Phytophthora root rot. Full article
(This article belongs to the Special Issue Advances in Citrus Pathology and Disease Management)
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12 pages, 1740 KiB  
Article
Reaction of Mandarins to the Alternaria Brown Spot and Huanglongbing: Identification of Potential Varieties for These Diseases to Be Managed in the Field
by Marinês Bastianel, Rodrigo Martinelli, Fernando Trevizan Devite, Mariangela Cristofani-Yaly, Rodrigo do Vale Ferreira, Eduardo Sanches Stuchi and Fernando Alves de Azevedo
Horticulturae 2023, 9(6), 641; https://doi.org/10.3390/horticulturae9060641 - 30 May 2023
Cited by 1 | Viewed by 1494
Abstract
Mandarins occupy the third group among citrus produced in Brazil. Primarily aimed at the fresh fruit market, commercial orchards have suffered significant production losses due to the high incidence of diseases, such as the alternaria brown spot (ABS) and huanglongbing (HLB). The fact [...] Read more.
Mandarins occupy the third group among citrus produced in Brazil. Primarily aimed at the fresh fruit market, commercial orchards have suffered significant production losses due to the high incidence of diseases, such as the alternaria brown spot (ABS) and huanglongbing (HLB). The fact that 80% of the orchards are composed of two varieties, Ponkan mandarin and Murcott tangor, which are highly susceptible to both diseases, demands intensive chemical control of the diseases in the field, which has resulted in a significant increase in production costs and a negative environmental impact. A total of one hundred and seventy-three mandarin accessions, including several species and hybrids belonging to the Collections of the Instituto Agronômico de Campinas (IAC), were evaluated in the field in an endemic location for the diseases. Evaluations of the incidence and severity of the diseases showed a range of genotypes tolerant to ABS that could replace the current commercial varieties, mainly within the clementine and willow leaf mandarin groups. Although, with differences in incidence and susceptibility to HLB, there are no tolerant varieties to this disease, which significantly impacts the loss of fruit quality. Full article
(This article belongs to the Special Issue Advances in Citrus Pathology and Disease Management)
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13 pages, 1242 KiB  
Article
Mandarin Essential Oils as an Alternative Method of Controlling the Fungus Alternaria alternata (Fr.: Fr.) Keissler
by Fernando Trevizan Devite, Fernando Alves de Azevedo, Marinês Bastianel, Evandro Henrique Schinor and Patrícia Marluci da Conceição
Horticulturae 2023, 9(6), 613; https://doi.org/10.3390/horticulturae9060613 - 23 May 2023
Cited by 2 | Viewed by 1606
Abstract
Alternaria brown spot (ABS) is a disease caused by the fungus A. alternata f. sp. citri, which results in lesions on the fruits, leaves, and branches of several mandarin varieties and their hybrids. Due to the high cost of fungicide application, alternative [...] Read more.
Alternaria brown spot (ABS) is a disease caused by the fungus A. alternata f. sp. citri, which results in lesions on the fruits, leaves, and branches of several mandarin varieties and their hybrids. Due to the high cost of fungicide application, alternative methods for controlling ABS need to be studied. Therefore, this study aimed to evaluate the use of essential oils (EOs) from different mandarin varieties to mitigate the effects of ABS. The inhibitory effect of different concentrations (1, 2, 4, 8, and 16 μL·mL−1) of the EOs of Fremont IAC 543 mandarin, IAC 2019Maria mandarin, Murcott IAC 221 tangor, and Late IAC 855 willowleaf on the in vitro mycelial growth of the fungus A. alternata was evaluated. Additionally, the curative and preventive effects of these EOs on the ABS symptoms in detached leaves of Murcott IAC 221 tangor were also assessed. The EO of IAC 2019 Maria mandarin induced less mycelial growth, and consequently, a greater inhibition of the growth of the fungus A. alternata at a concentration of 16 μL·mL−1. This EO was more effective for control than the other oils tested. In the detached leaf experiment, both the curative and preventive treatments at a concentration of 16 μL·mL−1 showed lower values of disease severity. Full article
(This article belongs to the Special Issue Advances in Citrus Pathology and Disease Management)
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