| Titre : |
Characterization of pomegranate heart rot disease caused by Altenaria sp. in Algeria and their control trials |
| Type de document : |
texte imprimé |
| Auteurs : |
Ihssan Cherief, Auteur ; N Abdessemed, Auteur |
| Editeur : |
Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza- |
| Année de publication : |
2024/2025 |
| Importance : |
p.66 |
| Présentation : |
couv. en noir et blanc ., ill., fig.,tabl. |
| Format : |
30 cm |
| Accompagnement : |
CD |
| Note générale : |
Bibliographie: p52-63.
Annexes: p64-66. |
| Langues : |
Français (fre) |
| Catégories : |
Agronomie
|
| Mots-clés : |
particularly Punica granatum L. Alternaria spp. |
| Index. décimale : |
630.20 |
| Résumé : |
Pomegranate (Punica granatum L.), originally from Central Asia, is widely grown, particularly in countries with a Mediterranean climate. It is highly appreciated for its nutritional value. In recent years, Mediterranean regions have seen the emergence or re-emergence of new and endemic diseases caused by fungal phytopathogens, such as Alternaria spp. In this context, our study aims to characterize four isolates of Alternaria sp. (G1, GM1, GM3 and TF1) on different media (PDA, PCA, V8, MEA, SNA and OA) and temperatures (10, 15, 20, 25, 30 and 35 °C), to describe the fungal structures of four isolates, to evaluate the antifungal potential of Trichoderma isolates (C1T2 and G1T) and essential oils (Thymus vulgaris and Eucalyptus globulus), and test the efficacy of fungicides (Difenoconazole and Azoxystrobin) against these Alternaria isolates. Results showed that the four Alternaria sp. isolates (GA, GM1, GM3 and TF1) grew best on PDA medium, and the first three sporulated more on OA medium. On the other hand, Alternaria isolate TF1 showed low sporulation on all media. The temperature of 25 °C is optimal for mycelial growth of all isolates. Trichoderma isolates showed antagonistic activity against Alternaria isolates (GA, GM1, GM3 and TF1); in direct confrontation, Trichoderma C1T2 reduced mycelial growth of the four isolates with inhibition rates of 48.89, 42.73, 46.42 and 81.73 % respectively, while Trichoderma G1T caused inhibition rates of 52.59, 40.45, 53.56 and 74.35%. In indirect confrontation, the inhibition rate caused by Trichoderma C1T2 on the four isolates; GA, GM1, GM3 and TF1 was 9.57, 14.29, 24.43 and 44.13 % respectively. Trichoderma G1T, on the other hand, caused inhibition rates of 13.91, 19.64, 41.98 and 40.85%. Both oils significantly inhibited the mycelial growth of all four isolates. Thymus vulgaris proved to be more effective with an inhibition rate of 82.22 % than Eucalyptus globulus of 45.36 % at the high dose. On the other hand, the fungicide Difenoconazole exerted a higher inhibitory effect with an inhibition ranging from 84.45 to 99.10 % than Azoxystrobin from 29.02 to 90.91 %. The results of this study shed light on the cultural and morphological characteristics of Alternaria sp. causal agents of pomegranate heart rot and the possibility of controlling this disease.
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Characterization of pomegranate heart rot disease caused by Altenaria sp. in Algeria and their control trials [texte imprimé] / Ihssan Cherief, Auteur ; N Abdessemed, Auteur . - Tipaza [Algérie] : Centre universitaire Morsli Abdellah - Tipaza-, 2024/2025 . - p.66 : couv. en noir et blanc ., ill., fig.,tabl. ; 30 cm + CD. Bibliographie: p52-63.
Annexes: p64-66. Langues : Français ( fre)
| Catégories : |
Agronomie
|
| Mots-clés : |
particularly Punica granatum L. Alternaria spp. |
| Index. décimale : |
630.20 |
| Résumé : |
Pomegranate (Punica granatum L.), originally from Central Asia, is widely grown, particularly in countries with a Mediterranean climate. It is highly appreciated for its nutritional value. In recent years, Mediterranean regions have seen the emergence or re-emergence of new and endemic diseases caused by fungal phytopathogens, such as Alternaria spp. In this context, our study aims to characterize four isolates of Alternaria sp. (G1, GM1, GM3 and TF1) on different media (PDA, PCA, V8, MEA, SNA and OA) and temperatures (10, 15, 20, 25, 30 and 35 °C), to describe the fungal structures of four isolates, to evaluate the antifungal potential of Trichoderma isolates (C1T2 and G1T) and essential oils (Thymus vulgaris and Eucalyptus globulus), and test the efficacy of fungicides (Difenoconazole and Azoxystrobin) against these Alternaria isolates. Results showed that the four Alternaria sp. isolates (GA, GM1, GM3 and TF1) grew best on PDA medium, and the first three sporulated more on OA medium. On the other hand, Alternaria isolate TF1 showed low sporulation on all media. The temperature of 25 °C is optimal for mycelial growth of all isolates. Trichoderma isolates showed antagonistic activity against Alternaria isolates (GA, GM1, GM3 and TF1); in direct confrontation, Trichoderma C1T2 reduced mycelial growth of the four isolates with inhibition rates of 48.89, 42.73, 46.42 and 81.73 % respectively, while Trichoderma G1T caused inhibition rates of 52.59, 40.45, 53.56 and 74.35%. In indirect confrontation, the inhibition rate caused by Trichoderma C1T2 on the four isolates; GA, GM1, GM3 and TF1 was 9.57, 14.29, 24.43 and 44.13 % respectively. Trichoderma G1T, on the other hand, caused inhibition rates of 13.91, 19.64, 41.98 and 40.85%. Both oils significantly inhibited the mycelial growth of all four isolates. Thymus vulgaris proved to be more effective with an inhibition rate of 82.22 % than Eucalyptus globulus of 45.36 % at the high dose. On the other hand, the fungicide Difenoconazole exerted a higher inhibitory effect with an inhibition ranging from 84.45 to 99.10 % than Azoxystrobin from 29.02 to 90.91 %. The results of this study shed light on the cultural and morphological characteristics of Alternaria sp. causal agents of pomegranate heart rot and the possibility of controlling this disease.
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