Dieback of Cashew (Anacardium Occidentale) in Cameroon

Dooh, Jules Patrice Ngoh; Heu, Alain; Nourou, Kone Nsangou Abdou; Bertrand, Mboussi S.; Christine, Asta D. B.; Brice, Tchoupou T. D.; Ambang, Zachée

doi:10.33866/phytopathol.030.02.0605

Cited by 2 publications

(3 citation statements)

References 14 publications

(20 reference statements)

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“…They were then disinfected with 70ºC alcohol and then with 1% Sodium Hypochlorite for three minutes and rinsed three times with water sterile distilled. Finally, the fragments were dried on previously sterile filter paper [18].…”

Section: Obtention Of Isolates and Ientification Of The Pathogenmentioning

confidence: 99%

“…The agent responsible of anthracnose is C. gloeosporioides, a highly fungus that attacks a variety of crops like sorghum, mango, papaya, banana, olive and guava [15,16]. The fungus infects leaves, flowers and fruits and thus reduces orchard yields and fruit quality [17][18][19]. This fungus causes a reduction in plant photosynthetic surface area because of tissue necrosis and defoliation of leaves.…”

Section: Introductionmentioning

confidence: 99%

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In vitro, In vivo and In situ, Effect of Mancozeb 80 WP on Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., Causative Agent of Anthracnose of Cashew (Anacardium occidentale L.) in Chad and Cameroon

Dooh

Placide

Madjerembe

et al. 2021

IJPR

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Aims: The aim of this work was to evaluate effect of Mancozeb 80 WP against Colletotrichum gloeosporioides, the agent responsible of anthracnose of cashew tree (Anacardium occidentale L.). Study Design: The experimental design was in completely randomized blocks with three replications. Place and Duration of Study: in vitro and in vivo experiments were performed in Laboratory of Department of Biological Sciences, University of Maroua during six months. Field trial was carried out in Kelo, Chad during three months. Methodology: Isolates were obtained from diseased organs (leaves and fruits) from Kélo in Chad and Maroua in Cameroon. The concentrations used in the laboratory were C1 (5 mg/ml), C2 (0.5 mg/ml), C3 (0.05 mg/ml), C4 (0.005 mg/ml), C5 (0.0 mg/ml). Radial growth, sporulation, conidial germination and pathogenicity were used to characterize and evaluate the effect of Mancozeb on the isolates in vitro. The preventive test was performed on three-month-old plants previously treated with Mancozeb. The concentration of 5 g/l was applied to the field and the incidence and severity were used to calculate the AUIPC (Area Under Disease Incidence Progress Curve) and AUSiPC (Area Under Disease Severity Index Progress Curve) curves. Results: Mancozeb reduced radial growth of all isolates at concentrations C1 (5 mg/ml), C2 (0.5 mg/ml) and C3 (0.05 mg/ml). The percentages of inhibition ranged from 50 to 100%. Mancozeb 80 WP completely (100%) inhibited the germination of C. gloeosporioides conidia in vitro. Mancozeb has protected cashew plants in vivo at the concentration C1 (5 mg/ml). AUIPC and AUSiPC were higher on control plants and lower on Mancozeb-treated plants. Conclusion: Mancozeb 80 WP may be associated in integrated pest management strategy against anthracnose.

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Section: Obtention Of Isolates and Ientification Of The Pathogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In vitro, In vivo and In situ, Effect of Mancozeb 80 WP on Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., Causative Agent of Anthracnose of Cashew (Anacardium occidentale L.) in Chad and Cameroon

Dooh

Placide

Madjerembe

et al. 2021

IJPR

Self Cite

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“…Studies of Lasiodiplodia in Taiwan have been reported in several agricultural hosts, including guava [ 34 ], mango [ 35 ], papaya [ 36 ], avocado [ 37 ], jackfruit [ 38 ], kumquat [ 39 ], Aquilaria sinensis [ 40 ], Araucariaceae [ 41 ], lima bean [ 42 ], Malabar chestnut [ 43 ], and Passiflora edulis [ 41 ]. It is crucial to highlight that previous identifications of Lasiodiplodia in Taiwan were primarily based on morphological characteristics, and molecular information was very limited.…”

Section: Introductionmentioning

confidence: 99%

Unveiling Cryptic Species Diversity and Genetic Variation of Lasiodiplodia (Botryosphaeriaceae, Botryosphaeriales) Infecting Fruit Crops in Taiwan

Ko,

Liyanage,

Shih

et al. 2023

JoF

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The genus Lasiodiplodia, a member of the family Botryosphaeriaceae, is an important fungal disease genus in agriculture. However, the Lasiodiplodia species survey and genetic diversity in Taiwan remain unclear. This study aimed to investigate the Lasiodiplodia species associated with various fruit species to explore the cryptic Lasiodiplodia species diversity, validate species delimitation, and unveil cryptic genetic diversity. Overall, six Lasiodiplodia species were identified, with several new records of infection identified. Additionally, phylogenetic analyses indicated that the relations of all isolates of L. theobromae might be paraphyletic. They were grouped with L. brasiliense based on Automatic Barcode Gap Discovery (ABGD), Automatic Partitioning (ASAP) and structure-based clustering analyses. These analyses did not provide conclusive evidence for L. brasiliensis as a stable species. It may be necessary to gather more information to clarify the species delineation. The multiple new records of Lasiodiplodia species with high genetic diversity and differentiation revealed that the diversity of Lasiodiplodia in Taiwan was underestimated in the past. We found that L. theobromae has the highest number of haplotypes but the lowest number of haplotype and nucleotide diversities, indicating a recent population expansion. This was supported by the significant negative Tajima’s D and Fu and Li’s D* tests. The high genetic diversity, low gene flow, and host-associated differentiation of Lasiodiplodia species indicate that they might harbour powerful evolutionary potential in Taiwan. This study provided critical insights into genetic variation, host-associated differentiation, and demography of Lasiodiplodia species, which would be helpful for disease management of related pathogens.

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Dieback of Cashew (Anacardium Occidentale) in Cameroon

Cited by 2 publications

References 14 publications

In vitro, In vivo and In situ, Effect of Mancozeb 80 WP on Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., Causative Agent of Anthracnose of Cashew (Anacardium occidentale L.) in Chad and Cameroon

In vitro, In vivo and In situ, Effect of Mancozeb 80 WP on Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., Causative Agent of Anthracnose of Cashew (Anacardium occidentale L.) in Chad and Cameroon

Unveiling Cryptic Species Diversity and Genetic Variation of Lasiodiplodia (Botryosphaeriaceae, Botryosphaeriales) Infecting Fruit Crops in Taiwan

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