Powdery mildew damage to the production of BRS 189 cashew plants

Lima, Joílson Silva; Martins, M. V. V.; Cardoso, J. E.

doi:10.1590/0034-737x201966020008

Cited by 4 publications

(2 citation statements)

References 21 publications

(22 reference statements)

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“…No of observed plants Disease severity was determined using leaf symptom expression scale 0 to 5. Zero (0) stands for no infection and 5 stands for the infection of the whole cashew canopy or branches as adapted from (Lichtenzveig et al, 2006;Lima et al, 2019;Molina et al, 2010) with some modification (Fig. 2).…”

Section: Disease Incidence (%) =mentioning

confidence: 99%

Ecological Factors Influencing Severity of Cashew Fusarium Wilt Disease in Tanzania

et al. 2021

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Cashew (Anacardium occidentale L.) is an important cash crop in Tanzania as a source of income to cashew growers and provides foreign exchange for the country. Despite its significance, the crop is threatened by fast spreading disease known as cashew Fusarium wilt caused by Fusarium oxysporum. Field assessment and laboratory tests were conducted to determine incidences of the disease, severity, ecological factors that influence them and explored the pathogen host specificity in six cashew growing districts. The results revealed significant (P<0.001) variation of disease incidences and severity among the studied districts. The results further revealed that there is both positive and negative correlation between the incidence and severity of the disease versus the evaluated ecological factors. The soil pH, soil temperature, air temperature, and relative humidity depicted positive correlation of disease incidence and severity versus ecological factors at ρ=0. 50 and ρ=0.60, ρ=0.20 and ρ=0.94, ρ=0.11 and ρ=0.812, ρ=0.05 and ρ=0.771 respectively while nitrogen, phosphorus, and carbon depicted negative correlations at ρ=-0.22 and ρ=-0.58, ρ=-0.15 and ρ=-0.94, ρ=-0.19 and ρ=-0.12 respectively. In terms of host range, none of the weed species was found to be a carrier of Fusarium pathogen implying that it is host specific or semi selective. The results revealed that the tested ecological parameters favor the growth and development of Fusarium pathogen. Thus, management of the disease requires nutrients replenishment and soil shading as essential components in developing appropriate strategies for the control and prevention of further spread of the disease.

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Section: Disease Incidence (%) =mentioning

confidence: 99%

Ecological Factors Influencing Severity of Cashew Fusarium Wilt Disease in Tanzania

et al. 2021

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“…Parmi les nombreux facteurs qui limitent sa production, les maladies ont été citées comme étant à l'origine des coûts de production élevés, de la mauvaise qualité des noix et du faible prix du marché (Dadili et al, 2018). Dans les études menées sur le continent africain, où la production de noix de cajou est une activité agricole importante, aucune étude sur les dommages n'a été réalisée lorsque la maladie est associée à la production de la plante (Joilson et al, 2019). Au Cameroun, une étude récente a permis de mettre en évidence la susceptibilité de l'anacardier aux maladies d'origine fongique (Jules et al, 2020).…”

Section: Introductionunclassified

Effet antifongique de deux extraits de plantes sur les agents pathogènes identifiés sur des fruits de l’anacardier (Anacardium occidentale L.) au Nord Cameroun

Nyaka¹,

Fadimatou²,

Dzokouo³

et al. 2021

Int. J. Bio. Chem. Sci

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L’anacardier (Anacardium occidentale L.), importante culture de rente, est confrontée à la menace de nombreux pathogènes qui entravent sa productivité au Cameroun. Dès lors, cette étude se propose de déterminer le potentiel d’une lutte biologique à base d’extraits végétaux sur les champignons pathogènes identifiés sur des fruits prélevés dans le bassin de la Benoué. Pour atteindre ces objectifs, l’identification des agents pathogènes des fruits, des tests de pathogénicité et l’évaluation de l’effet antifongique in vitro et in vivo des extraits de piments et de neem ont été effectués. Les résultats ont montré que ces fruits abritent une diversité d’espèces fongiques dont les principales sont Colletotrichum gloeosporioides, Oïdium anacardii, Fusarium solani, Aspergillus niger et Phytophthora sp. Les tests de pathogénicité ont produit les symptômes des maladies observées sur le terrain. L’huile de neem et les extrait de piment ont inhibé totalement la croissance de C. gloeosporioides, O. anacardii et A. niger aux doses respectives de 7,5% v/v et 75 mg/ml. Cependant, l'huile de neem s'est avérée plus efficace. Ces résultats représentent des sources d'information précieuses pour l’implémentation d'une stratégie de lutte intégrée contre les agents pathogènes de l’anacardier à l’origine de la baisse de sa productivité, affectant ainsi son potentiel économique. English Title: Antifungal effect of two plant extracts on pathogens identified on fruits of Cashew tree (Anacardium occidentale L.) in North Cameroon The Cashew tree (Anacardium occidentale L.), an important cash crop, is challenged by the proliferation of pathogens that affect its productivity in Cameroon. Therefore, this study aims to determine the potential of a biological control based on plant extracts on pathogenic fungi identified on fruits collected in the Benoué basin. To achieve these objectives, identification of fruit pathogens, pathogenicity tests and evaluation of the in vitro and in vivo antifungal effect of chilli and neem extracts were carried out. The results showed that these fruits harbour a diversity of fungal species, of which the main ones are Colletotrichum gloeosporioides, Oïdium anacardii, Fusarium solani, Aspergillus niger and Phytophthora sp. The pathogenicity tests have generated the symptoms of the diseases observed in the field. Neem oil and chilli extracts completely inhibited the growth of C. gloeosporioides, O. anacardii and A. niger at doses of 7.5% v/v and 75 mg/ml respectively. However, neem oil proved to be more effective. These results represent valuable sources of information for the implementation of an integrated pest management strategy against cashew pathogens that impede the productivity of the tree, thereby affecting its economic potential.

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The efficacy of biofungicides on cashew wilt disease caused by Fusarium oxysporum

et al. 2022

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Powdery mildew damage to the production of BRS 189 cashew plants

Cited by 4 publications

References 21 publications

Ecological Factors Influencing Severity of Cashew Fusarium Wilt Disease in Tanzania

Ecological Factors Influencing Severity of Cashew Fusarium Wilt Disease in Tanzania

Effet antifongique de deux extraits de plantes sur les agents pathogènes identifiés sur des fruits de l’anacardier (Anacardium occidentale L.) au Nord Cameroun

The efficacy of biofungicides on cashew wilt disease caused by Fusarium oxysporum

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