Assessment of Peacock Spot Disease (Fusicladium oleagineum) in Olive Orchards Through Agronomic Approaches and UAV-Based Multispectral Imaging

Horticulturae, Journal Year: 2025, Volume and Issue: 11(1), P. 46 - 46

Published: Jan. 6, 2025

Olive leaf spot (OLS), caused by Fusicladium oleagineum, is a significant disease affecting olive orchards, leading to reduced yields and compromising tree health. Early accurate detection of this critical for effective management. This study presents comprehensive assessment OLS progression in orchards integrating agronomic measurements multispectral imaging techniques. Key parameters—incidence, severity, diseased area, index—were systematically monitored from March October, revealing peak values 45% incidence April 35% severity May. Multispectral drone imagery, using sensors NIR, Red, Green, Red Edge spectral bands, enabled the calculation vegetation indices. Indices incorporating near-infrared such as SR705-750, exhibited strongest correlations with (correlation coefficients 0.72 0.68, respectively). combined approach highlights potential remote sensing early supports precision agriculture practices facilitating targeted interventions optimized orchard The findings underscore effectiveness traditional advanced analysis improve surveillance promote sustainable cultivation.

Language: Английский

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Diversity and Pathogenicity of Botryosphaeriaceae and Phytophthora Species Associated with Emerging Olive Diseases in Italy

Agriculture, Journal Year: 2023, Volume and Issue: 13(8), P. 1575 - 1575

Published: Aug. 7, 2023

Extensive collar rot, sunken and bleeding cankers, shoot blight, fruit rot symptoms on olive trees have recently been observed in several orchards Italy. Since there is little information about the etiology of these diseases given high economic relevance this iconic crop, a study was conducted from autumn 2017 to summer 2022, four Italian regions, define occurrence, distribution impact main pathogens involved. A total 1064 symptomatic samples were collected processed. Based colony appearance, micromorphological analysis DNA sequence data, thirty-eight species, including eighteen Botryosphaeriaceae species belonging five genera fifteen Phytophthora isolated identified, thirteen which, Diplodia africana, D. fraxini, subglobosa, Dothiorella omnivora, Do. sarmentorum, sempervirentis, Sardiniella urbana (Botryosphaeriaceae), cactorum, P. cinnamomi, citricola, crassamura, niederhauserii pseudocryptogea, are reported here for first time trees. Pathogenicity tests performed unripe drupes potted seedlings completed Koch postulates highlighted that represent growing threat

Language: Английский

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The dynamic changes in olive fruit phenolic metabolism and its contribution to the activation of quiescent Colletotrichum infection

Food Chemistry, Journal Year: 2024, Volume and Issue: 450, P. 139299 - 139299

Published: April 9, 2024

Anthracnose, the most critical disease affecting olive fruits, is caused by Colletotrichum species. While developing fruits are immune to pathogen regardless of cultivar, resistance level varies once fruit ripens. The defense mechanisms responsible for this difference in not well understood. To explore this, we analyzed phenolic metabolic pathways occurring and their susceptibility during ripening two resistant cultivars ('Empeltre' 'Frantoio') susceptible ('Hojiblanca' 'Picudo'). Overall, induced synthesis aldehydic demethylated forms phenols, which highly inhibited fungal spore germination. In contrast, promoted hydroxytyrosol 4-O-glucoside ripening, a compound with no antifungal effect. This study showed that distinct profiles between play key role determining

Language: Английский

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Venturia

Published: Jan. 1, 2025

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Confronting stresses affecting olive cultivation from the holobiont perspective

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Nov. 6, 2023

The holobiont concept has revolutionized our understanding of plant-associated microbiomes and their significance for the development, fitness, growth resilience host plants. olive tree holds an iconic status within Mediterranean Basin. Innovative changes introduced in cropping systems, driven by increasing demand its derived products, are not only modifying traditional landscape this relevant commodity but may also imply that either or emerging stresses can affect it ways yet to be thoroughly investigated. Incomplete information is currently available about impact abiotic biotic pressures on holobiont, what includes specific features associated microbiome relation host’s structural, chemical, genetic physiological traits. This comprehensive review consolidates existing knowledge stress factors affecting cultivation compiles microbiota with different tissues organs. We aim offer, based evidence, insightful perspective diverse stressing disturb structure, composition network interactions olive-associated microbial communities, underscoring importance adopt a more holistic methodology. identification gaps emphasizes need multilevel research approaches consider conceptual framework future investigations. By doing so, powerful tools promote olive’s health, productivity envisaged. These assist designing sustainable agronomic practices novel breeding strategies effectively face evolving environmental challenges growing high quality food products.

Language: Английский

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Innovations towards sustainable olive crop management: a new dawn by precision agriculture including endo-therapy

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: June 6, 2023

Olive trees ( Olea europaea L.) are deeply interwoven with the past, present and future of Mediterranean civilizations, both as essential economical well cultural valuables. horticulture constitutes one primary agroecosystems in regions today. Being inhabitant ecological niches, is prone to a peculiar vulnerability towards climatic socioeconomical transformations that briskly reshaping regional global agroecosystems. Because changes biosafety risks agricultural trades, olive plants highly susceptible newly emerging diseases pests, traditional horticultural crop protection practices under scrutiny reducing their impact. Hence there an eminent demand for more nature-positive tree management. Recent innovations precision agriculture raising prospect innovative methods may provide farmers required agility respond challenges. For instance, endo-therapy, which systemic delivery active ingredients via trunk injection, technology holds promise true step-change sustainable Endo-therapy allows reaching vascular inaccessible foliar treatments delivers precise manner no off-target drifts. Similarly, progresses biological using controlled release based on formulation technologies showing exciting potential targeted solutions. This review summarizes latest physical deliveries realm arboriculture gives outlook how these help orchestrating culture soon.

Language: Английский

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The contrasting responses of abundant and rare microbial community structures and co-occurrence networks to secondary forest succession in the subalpine region

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: May 12, 2023

Knowledge of variations in abundant and rare soil microbial communities interactions during secondary forest succession is lacking. Soil samples were gathered from different successional stages (grassland, shrubland, forest) to study the responses bacterial fungal communities, driving factors by Illumina sequencing 16S ITS rRNA genes. The results showed that α-diversities (Shannon index) bacteria fungi revealed no significant changes succession, but increased significantly for bacteria. β-diversities changed succession. Network analysis obvious topological properties (nodes, links, average degree) networks In contrast, these higher than those grassland indicating are more responsive microorganisms. Additionally, greater network complexity due their numbers nodes links. keystone species differed between consisted 1 48 taxa networks, respectively. TP was most important influencing factor communities. Successional plant richness had influences on C:P, SM N:P mainly related properties. Our indicates respond differently

Language: Английский

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Approximation of basins of attraction for bistable dynamical system for olive disease control

Applied Numerical Mathematics, Journal Year: 2023, Volume and Issue: 200, P. 138 - 147

Published: May 9, 2023

In this paper the bistability of a mathematical model for control an olive tree disease is studied. The basin stability values were computed three different pairs bistable equilibrium points by using software bSTAB. Moreover extension functionalities made, first approximating shape attractors in dimensions and second extending sensitivity study with respect to some important parameters numerical scheme, e.g. hyperparameters, two dimensional case. Analogously, bifurcation diagram one parameter was extended case where can vary simultaneously. Finally approximation surfaces analysis diagrams made.

Language: Английский

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Nanopore-Sequencing Metabarcoding for Identification of Phytopathogenic and Endophytic Fungi in Olive (Olea europaea) Twigs

Journal of Fungi, Journal Year: 2023, Volume and Issue: 9(11), P. 1119 - 1119

Published: Nov. 18, 2023

Metabarcoding approaches for the identification of plant disease pathogens and characterization microbial populations constitute a rapidly evolving research field. Fungal diseases are major phytopathological concern; thus, development metabarcoding detection phytopathogenic fungi is becoming increasingly imperative in context prognosis. We developed multiplex method fungal phytopathogens endophytes olive young shoots, using MinION sequencing platform (Oxford Nanopore Technologies). Selected fungal-specific primers were used to amplify three different genomic DNA loci (ITS, beta-tubulin, 28S LSU) originating from twigs. A approach was initially evaluated healthy twigs, further assessed with naturally infected twig samples. Bioinformatic analysis basecalled reads carried out MinKNOW, BLAST+ R programming, results also BugSeq cloud platform. Data highlighted based on ITS their combination beta-tubulin as most informative ones according diversity estimations. Subsequent implementation symptomatic samples identified including genera such Cladosporium, Didymosphaeria, Paraconiothyrium, Penicillium, Phoma, Verticillium, others.

Language: Английский

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No- or Low-Content Copper Compounds for Controlling Venturia oleaginea, the Causal Agent of Olive Leaf Spot Disease

Plants, Journal Year: 2024, Volume and Issue: 13(5), P. 600 - 600

Published: Feb. 22, 2024

The efficacy of using a synthetic (azoxystrobin + difenoconazole), copper-based (copper oxychloride) and low-content copper compound complexed with gluconate lignosulphonate) fungicides for controlling Venturia oleaginea, the causal agent olive spot disease, was evaluated in an (cv. Nabali) orchard located Kafr Qud area (Palestine) 2017–2018. Treatments were applied at three different times (February, April, August). In January 2017, beginning experiment, about 90% leaves grown 2016 infected. Defoliation determined by counting on labeled branches initially then periodically. It increased gradually both control treated trees, but those azoxystrobin difenoconazole or lignosulphonate showed slower defoliation rate. During new shoots grew developed. All treatments reduced drop respect to control, positive effects reproductive activity (inflorescence growth yield). Overall, all significantly thus indicating possibility greatly reducing infections if are regularly each year, also traditional (copper-based) fungicides. Due their capability penetrating inside vegetative tissue, reduced/slowed down infected leaves. use these is therefore particularly recommended when leaf disease severe. compounds allows amount metallic used against V. oleaginea be reduced.

Language: Английский

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