JAAOG (26)
Children categories
18
février
2026
Verticillium Wilt of Olive in Tunisia: An Integrated Review of Pathogen, Disease Dynamics and Sustainable Management Strategies
- Titre : Verticillium Wilt of Olive in Tunisia: An Integrated Review of Pathogen, Disease Dynamics
and Sustainable Management Strategies - DOI:
- Auteur : Yaakoub Gharbi¹, Emna Bouazizi¹, Manel Cheffi¹, Mohamed Ali Triki¹
- Abstract :Verticillium wilt, caused by the soil-borne fungus Verticillium dahliae, represents a major threat to olive
cultivation (Olea europaea L.) in Tunisia, a leading global producer of olive oil. Since its initial detection in
2006 in the south, the disease has spread to key olive-growing areas, causing significant economic losses
through tree mortality, yield reduction, and diminished oil quality. Tunisian research has been pivotal in
characterizing the local pathogen, revealing significant genetic diversity and the presence of highly virulent
defoliating (D) pathotypes (Triki et al., 2011). This review synthesizes recent advances (2006-2024) in
understanding the pathogen's biology, genetic diversity, and interaction with the host and environment, with
a specific emphasis on the Tunisian context. It provides a critical evaluation of integrated disease
management (IDM) strategies developed and tested within the country, from pre-planting diagnostics using
advanced molecular tools to the identification of promising local biocontrol agents and the evaluation of
resistant cultivars. This review also highlights emerging insights from worldwide studies, including the
exploration of the olive holobiont and the potential of RNA interference (RNAi) and phage therapy as nextgeneration
control methods (Tuberosa, 2012). Finally, we outline future research priorities based on local
findings, emphasizing the need for climate-resilient solutions and a holistic "holobiont" approach to
safeguard the sustainability of Tunisia's vital olive sector. - Pagination : 01-10
Mots clés
- Titre : Fire Blight Disease Research Achievements in Tunisia: A Comprehensive Review
- DOI:
- Auteur : Emna Bouazizi¹, Yaakoub Gharbi¹, Triki Mohamed Ali¹
- Abstract :Fire blight disease, caused by Erwinia amylovora (Burrill), emerged as a devastating pathogen in Tunisia in spring 2012, causing catastrophic losses to the national pear and apple industry (Rhouma et al., 2014). Since its first detection in the Morneg region (Ben Arous governorate), the disease has spread rapidly throughout northern Tunisia, destroying more than 5,500 hectares of pear plantations (approximately 65% of total cultivated area) and reducing national pear production from 60,000 metric tons in 2011 to less than 20,000 metric tons by 2016 (Rhouma et al., 2014; Gaaliche et al., 2018). This review synthesizes significant research achievements by Tunisian scientists in understanding and combating fire blight since 2012. Major accomplishments include: establishment of pathogen identity through rigorous microbiological and molecular characterization (Rhouma et al., 2014; Bouazizi et al., 2025); comprehensive epidemiological assessment across all major production regions (Gaaliche et al., 2018); evaluation of cultivar susceptibility patterns and identification of resistance mechanisms (Gaaliche et al., 2018; Bouazizi et al., 2020); investigation of population genetic diversity and structure of E. amylovora isolates; characterization of virulence variability among pathogen populations; identification of molecular mechanisms underlying host defense responses including antioxidant systems and salicylic acid signaling (Bouazizi et al., 2020); isolation and characterization of bacteriophages with potential for biological control; and investigation of pathogenic determinants at the molecular level, including virulence gene regulation and metabolic signaling in the plant apoplast (Jeridi, 2022).
- Pagination : 9-22
25
septembre
2025
Enhancing Agricultural Practices through Satellite Imagery: Impact on Crop Health and Farming Practices
- Titre : Enhancing Agricultural Practices through Satellite Imagery: Impact on Crop Health and Farming Practices
- DOI:
- Auteur : Karim Ennouri, Mohamed Ali Triki, Manel Cheffi1, Rahma Mallek, Eetizez Karoui, Asma Ben Amara, Fathi Ben Amar, Monia Ennouri
- Abstract :The use of satellite imagery in agriculture has transformed how farmers monitor crop health, allowing them to make informed decisions based on real-time data. By analyzing multispectral and hyper spectral images, farmers can effectively track the growth stages of crops and identify stress patterns. This leads to improved management strategies and timely interventions that help prevent performance losses. The combination of satellite data, geographic information systems (GIS) and crop modelling enhances predictive capabilities, optimizing planting and harvesting schedules. As a result, farmers experience substantial economic benefits, including increased crop yields and greater profitability. This review examines the significant impact of satellite technologies on farming practices, high lighting the importance of monitoring environmental factors, including soil moisture, temperature, and pest infestations.
- Pagination : 0-08
02
juillet
2025
Comportement et potentialités fructifères de quelques variétés d’amandier (Prunus amygdalus L.) cultivées dans la région de Bouficha
- Titre : Comportement et potentialités fructifères de quelques variétés d’amandier (Prunus amygdalus L.) cultivées dans la région de Bouficha
- DOI : 10.71751/jaaogv4i1y2025-1-12
- Auteur : Meriem Mhadhbi, Hassouna Gouta, Ibtissem Laaribi , Wadhah Ghuenimi, Hichem Rejeb
- Résumé : Cette étude s’est intéressée à l’évaluation des potentialités fructifères et du niveau d’adaptation de deux variétés autofertiles d’amandier ‘Mazzetto’ et ‘Lauranne’ conduites en intensif dans la région de Bouficha (centre de Tunisie). Les objectifs convoités par ce travail se résument comme suit : (i) L’évaluation du comportement architecturale et de ramification des deux variétés. (ii) L’étude des capacités fructifères des deux variétés afin d’évaluer leurs niveaux d’adaptation sur le plan morphogénétique et fructifère. La variété ‘Mazzetto’ se révèle plus vigoureuse que ‘Lauranne’ dans les conditions de Bouficha, bien que les deux variétés soient cultivées dans des conditions climatiques et culturales similaires. De plus, la variété ‘Lauranne’ présente un taux élevé de bourgeons fructifères, avec une moyenne de 8,37 par 10 cm, tandis que la variété ‘Mazzetto’ se distingue par une fertilité supérieure, notamment sur les rameaux âgés, avec un taux de fructification de l’ordre de 86,15 %. Il a ainsi été démontré que, en termes d’autofertilité, la variété ‘Lauranne’ s’avère plus fertile que la variété ‘Mazzetto’. Par ailleurs, les taux de rétention des fruits de ‘Lauranne’ sont les plus élevés, atteignant 25,51 %. Toutefois, le suivi de l’évolution de l’amandon a montré que les fruits de la variété ‘Mazzetto’ atteignent une maturité en vert plus précoce. En ce qui concerne le rendement au cassage, la variété ‘Mazzetto’ a affiché un rendement de 35 %.
- Pagination : 1-12
Mots clés
- Titre : Application of remote sensing technology for plant disease detection
- DOI: 10.71751/jaaogv4i1y2025-13-18
- Auteur : Karim Ennouri, Mohamed Ali Triki, Mohamed Gouiaa, Fathi Ben Amar, Monia Ennouri
- Résumé : The application of remote sensing technologies in plant disease detection represents a transformative
advancement in agricultural management, particularly in combating threats posed by bacterial pathogens.
Bacteria significantly impact crop health, leading to reduced yields and economic losses for farmers. Remote
sensing, utilizing satellite imagery and specialized sensors, enables early identification of disease symptoms
through analysis of spectral signatures, allowing for timely interventions. Various remote sensing methods,
including multispectral and hyperspectral imaging, provide detailed insights into plant health, facilitating the
development of targeted disease management strategies. Despite challenges such as technical limitations and
environmental factors affecting data accuracy, ongoing advancements in sensor technology and data
interpretation methodologies promise to enhance the effectiveness of remote sensing in agriculture. Future
perspectives highlight the importance of integrating remote sensing with ground-based methods and fostering
collaboration among stakeholders to ensure sustainable agricultural practices and food security. - Pagination : 13-18
- Titre : Beetles infesting pistachio (Pistacia vera L.) in Tunisia and their auxiliary fauna
- DOI :10.71751/jaaogv3i2y2024-15-28
- Auteur : Karama HADJ TAIEB, Houda GHARSALLAH, Ines KSENTINI, Andreas LECLERQUE, Haifa BEN
GHARSA, Mohamed Ali TRIKI, Mohieddine KSANTINI - Résumé : Numerous pests, like beetles, which have expanded widely due to climate change, harm pistachio crops. Using morphological and barcoding methods, we looked into the biodiversity of pistachio beetles and their parasitoids. Seven different species of insects were found in pistachio branches. Two molecular markers, the mitochondrial cytochrome oxidase I (COI) and the region (D2-D3) of the nuclear ribosomal RNA operon's 28S rRNA gene, were used to identify these insects. Five species a similarity ≥97% were identified. For the remaining two species, sequence identities did not exceed 93% and their identification was only made at the genus level. Our findings indicated
that the four following species of beetles develop on pistachio trees: Chaetoptelius vestitus (Mulsant & Rey, 1861) (Coleoptera, Curculionidae), Carphoborus perrisi
(Chapuis, 1869) (Coleoptera, Curculionidae), Phoracanthas emipunctata (Fabricius, 1775) (Coleoptera, Cerambycidae) and Sinoxylon sp. (Coleoptera, Bostrichidae). Furthermore, three species were identified as parasitizing these beetles: Doryctes leucogaster (Nees, 1834) (Hymenoptera, Braconidae), Cheiropachus quadrum (Fabricius, 1787) (Hymenoptera, Pteromalidae) and Ecphylus sp. (Hymenoptera, Braconidae). - Pagination : 15-28
15
novembre
2024
« J’IRRIGUE MES OLIVIERS » : UNE APPLICATION EXCEL POUR LA DETERMINATION DES BESOINS EN EAU DE L’OLIVIER ET DES PARAMETRES DE L’IRRIGATION
- Titre : « J'IRRIGUE MES OLIVIERS » : Une application excel pour la détermination des besoins en eau de l'olivier et des paramètres de l'irrigation
- DOI: 10.71751/JAAOGv2i2y2023-1-8
- Auteur : Chiraz Masmoudi Charfi; Kamel Gargouri
- Résumé : « J'irrigue mes oliviers » est une application développée dans le cadre de la lettre d'accord signée entre l'Institut de l'Olivier et la FAO (2020-2022) dans le but de fournir un outil permettant de déterminer les besoins en eau des cultures (ETc) et les besoins en eau d'irrigation (I) de la plantation d'oliviers qu'elle soit irriguée en eau douce ou salée.
L'application est constituée d'un fichier Excel de cinq pages. Les deux premières pages sont consacrées aux données d'évapotranspiration de référence (ETo) et de précipitations. La page 3 comprend les données parcellaires saisies spécifiquement pour chaque oliveraie. La page 4 présente les procédures et formules de calcul qui sont utilisées pour déterminer l'évapotranspiration des cultures (ETc) et les paramètres d'irrigation. La dernière page est celle des extrants, où sont tabulées les valeurs mensuelles d'ETc, la dose d'irrigation, la fraction lessivée, etc. Un exemple est appliqué à titre illustratif. Dans le futur, l'application « J'irrigue mes oliviers » pourra être adaptée pour être utilisée dans d'autres cultures arboricoles. - Pagination : 1-8
14
novembre
2024
Assessment of different Agricultural techniques on soil biological activity of olive tree in the Southern region of Tunisia
- Titre : Assessment of different Agricultural techniques on soil biological activity of olive tree in the Southern region of Tunisia
- DOI : 10.71751/JAAOGv1i1y2022-1-10
- Auteur : Haifa RAJHI; Jose Luis SANZ MARTIN; Ana MORATO; Habib BOUSNINA; MounirABICHOU
- Abstract : The climate change and water shortage have a huge drawback in the agriculture in the dry region. The case of drought was observed in the South of Tunisia in the Olive tree culture. Indeed, this degradation results from an obvious reduction in the soil activity. The plantation of the fig tree in intercalary in with Olive tree the soil plot (P4) and a soil Olive mill wastewater OMW spreading plot (P3) were involved in soil remediation in the Olive tree Field. These plots were compared with untouched soil (P1) and soil planted with Olive tree since 1900(P2). The P3 showed an important Organic Matter (2.14mg/g). However, the Soil fertility measured via Germination Index (GI) revealed an important rate (200.08 %) in P4. In contrast to the soil fertility of that P3 didn’t exceed the 60.20%. Correlation analyses between different soil parameters revealed significant trends; especially that observed by the negative correlation between respiration soil activity (Resp) and organic matter (OM) (r=-0.610, p<0.05). Indeed, a soil CO2 sequestration may take place. In addition, an important bacterial diversity revealed by Denaturing gradient gel electrophoresis DGGE molecular technique was observed in the P3. This result suggested the beneficial effects of OMW spreading on the soil bacterial biodiversity.
- Pagination : 1-10
14
novembre
2024
Fatty acid and Antioxidant content of Chemlali extra virgin olive oil and its hydrophilic and lipophilic fractions
- Titre : Fatty acid and Antioxidant content of Chemlali extra virgin olive oil and its hydrophilic and lipophilic fractions
- DOI : 10.71751/JAAOGv1i1y2022-55-63
- Auteur : Imen GHORBEL; Mouna KHMEKHEM; Raja BEN AMAR; Naziha GRATI-KAMMOUN
- Abstract : Olive Oil is a fundamental ingredient of the Mediterranean diet for its healthy properties.
The aim of this study was to determine i) the most relevant quality parameters (Free acidity, K232, K270 and PV) of chemlali olive oil samples ii) to evaluate fatty acids and antioxidant content of chemlali olive oil and its hydrophilic (OOHF) and lipophilic (OOLF) fractions iii) to compare the chemical characterization between olive oil and its fractions. OOHF was extracted from olive oil using water by centrifugation process. OOLF was obtained by filtration process through a hydrophobic composite ceramic membrane. According to quality parameters, all our oil samples were classified in the category “extra virgin olive oil”. Our results showed that EVOO and OOLF fatty acid analyses revealed the same amount of MUFA. EVOO and OOHF contained a higher content of unsaponifiable components like polyphenols, which might contribute to olive oil’s beneficial effect. - Pagination : 55-63
14
novembre
2024
Fatty acid composition in olive (Olea europaea. L) oil of progenies obtained from Tunisian crossbreeding program
- Titre : Fatty acid composition in olive (Olea europaea. L) oil of progenies obtained from Tunisian crossbreeding program
- DOI : 10.71751/JAAOGv1i1y2022-11-23
- Auteur : Mohamed AYADI1; Fathi BEN AMAR
- Abstract : Five preselected olive progenies from a Tunisian crossing program between 'Chemlali Sfax' variety and several Mediterranean varieties were evaluated for their fatty acid composition in comparison with the original variety. These progenies were planted in a trial orchard with 4mx6m space and irrigated conditions in the experimental station ‘Ettaous’ in Sfax (Tunisia). The analysis of variance revealed significant differences among progenies for C16:0, C16:1, C18:1, C18:2 and C18:3. The Hierarchical Cluster Analysis classified the progenies into three main groups. Two groups included four olive progenies characterized mainly by high oleic and low palmitic acid contents. There were significant negative correlations between oleic acid and palmitic, palmitoleic, linoleic and linolenic acids. The principal component analysis showed that two components accounted for 75% of the total variation observed and revealed the importance of the main fatty acids 16:0, 18:1 and 18:2 in the characterization of olive progenies. The fatty acid compositions of the oils from all the progenies comply with international standards and show more beneficial characteristics than the oil obtained from ‘Chemlali Sfax’ (higher oleic acid content and lower palmitic acid content) except for hybrid 2 oil which showed an unchanged fatty acid composition. From this study, four promising progenies could be candidates for release and further investigation on minor chemical components must be undertaken.
- Pagination : 11-23
