Comparative effectiveness of chemical biocides and Acalypha wilkesiana leaf extract against postharvest fungal deteriogens of sweet orange (Citrus sinensis) fruits

Akinde, Sunday B.; Adeniyi, Mobolaji Adenike; Adebunmi, Adetoun A.; Oluwajide, Odunola Oluwaseun; Ogunnaike, Oluwaseun Oluwatoyin

doi:10.1016/j.ejbas.2017.03.001

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…Comparable activities were reported for other medicinal plants against other phytopathogens [15][16][17]. Findings from this study were also comparable to the effect of chemical fungicides reported earlier [18,19]. Our findings, thus, suggest that water soluble fractions of petroleum hydrocarbon possess constituents that can also prevent the mycelial growth and development of the test fungal pathogen.…”

Section: Resultssupporting

confidence: 88%

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of Botryodiplodia theobromae (Pat.)

Meomikem Ehiobu

2017

JDMP

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Abstract:The control of fungal pathogens of economic crops in soil is crucial to sustainable food production and distribution. In this study, the effect of aqueous fractions of petroleum hydrocarbons was investigated on the growth and sporulation of Botryodiplodia theobromae (Pat.), a common fungal pathogen isolated from rotten cassava tubers. The fungal isolates were subjected to graded concentrations of the water-soluble fraction (WSF) of crude oil and monitored for their effects on the mycelial growth and spore germination using standard mycological media and techniques. Results revealed that the biological effects of the chemical fraction were concentration dependent and significant at P = 0.01 and 0.05 when compared with the controls. After 5 h, the least inhibitory effect against the spore germination was observed by the 1 mL WSF concentration with 87% spore germination. The effects were significantly different (P<0.01) at WSF concentrations of 7.0-9.0 mg/mL with percentage germination values of 44%, 46% and 29% respectively. The mycelial growths were also significantly reduced with the highest inhibition being 73% at 9.0 mg/mL. The mycelial dry weight remained significantly unchanged (P>0.05) at higher concentrations. Findings from this study suggest that aqueous soluble fractions of petroleum hydrocarbons can significantly inhibit the spores and mycelium growth of B. theobromae (Pat.). Thus, they could be exploited as template for biosynthesis of potential fungicide against the test phytopathogens.

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Section: Resultssupporting

confidence: 88%

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of Botryodiplodia theobromae (Pat.)

Meomikem Ehiobu

2017

JDMP

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“…Variability of the fungal communities in composition and structure in the samples from the three trees and across the four locations (Table 4) could be attributed to the fungal spore size and the degree of mycelial fragmentation; and subsequent aerosolisation (Adhikari et al, 2009;Gralton et al, 2011;Barberán et al, 2015;Spilak et al, 2015). Most of the isolated fungal species are important causative agents of postharvest diseases of cocoa, kola-nuts and citrus trees (Peever et al, 2005;Ezeibekwe et al, 2008;Singh et al, 2012;Anitha et al, 2014;Akinde et al, 2017). These key findings are noteworthy for improvement in sanitation and overall management of old plantations.…”

Section: Discussionmentioning

confidence: 99%

“…They were randomly picked using a mounting needle, and sub-cultured onto fresh PDA plates, and incubated for 5 days. All axenic strains were stored on PDA slants for further characterisation (Akinde et al, 2017).…”

Section: Enumeration Of Fungimentioning

confidence: 99%

Fungi associated with a dry invasive white patches on trunks of economic fruit trees in south-west Nigeria

Akinde¹,

Lamidi²,

Ayeni³

2019

Afr. Crop Sci. J.

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An unprecedented number of fungal and fungal-like diseases are the main threat to the diversity and productivity of economic fruit trees in southwest Nigeria. The objective of this study was to investigate the fungi associated with dry invasive whitish patches, noticeable on trunks and branches of cocoa (Theobroma cacao), kola-nut (Cola spp.) and sweet orange (Citrus sinensis) trees prevalent in southwest Nigeria. A total of 108 whitish patch scraped samples were aseptically obtained from the affected cocoa, kola-nut and sweet orange trees in Osogbo, Ife, Ejigbo and Ilesha plantations in southwest Nigeria for this study. Viable fungal populations, were determined using the spread-plate techniques; and pure fungal isolates were identified through their morphological appearance, microscopic features and sporing structures. Mean viable fungal count in the samples ranged from 3.85 x 10 4 ± 0.00 to 9.75 x 10 3 ± 0.00 CFU g-1. Viable fungal counts were significantly different (P < 0.05) between fruit tree species and across locations. A total of 52 fungal species belonging to 21 genera were isolated, with Aspergillus and Penicilliumas predominating and occurring at 23 and 17%, respectively. Other isolated genera included seven from cocoa trees; ten from kola-nut trees and five from sweet orange trees. There is need for appropriate control strategies to prevent further spread in contiguous plantations.

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Phytochemical Content and In Vitro Antimycelial Efficacy of Colocasia esculenta (L), Manihot esculenta (Crantz) and Dioscorea rotundata (Poir) Leaf Extracts on Aspergillus niger and Botryodiplodia theobromae

Ogu

2018

JHPR

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TheIn Vitroefficacy of aqueous leaf extracts of common edible root crops (Colocasiaesculenta,ManihotesculentaandDioscorearotundata) were investigated againstAspergillusnigerandBotryodiplodiatheobromae. The fungi were isolated from rotten tubers of yam using antibiotic-amended potatoes dextrose agar. Graded aqueous leaf extract concentrations (25 g/L, 50 g/L and 75 g/L) of each plant were applied against each test fungi on PDA plates and their mycelial growth inhibition activities were monitored for 144 hrs. Camazeb (5 – 10 g/L), a fungicide, was used as positive control agent. The phytochemical constituents of each extracts were also analyzed using standard techniques. The patterns of antifungal activities of the extracts were concentration and pathogen dependent. The most effective mean mycelial growth inhibitions were found withD.esculentaandC.esculentaagainstB.theobromae(61.9 – 80.9 %) andA.niger(63.8 – 82.8 %), respectively. Though,M.esculentaleaf extracts generally demonstrated the least antifungal activities against both pathogens, their activities were significant at 75 g/L. The antifungal potency of bothD.esculentaandC.esculentawere comparable to Camabez (chemical fungicide), which demonstrated 100 % inhibition at both 5 and 10 g/L concentrations. Higher concentrations of saponins (5.64 - 6.71 mg/100g), tannins (4.42 – 7.23 mg/100g) and flavonoids (3.64 – 5.25 mg/100g) were detected in the extracts, and could probably be linked to the observed antifungal activities. Findings from this study showed thatD.esculenta,C.esculentaandM.esculentaposses bioactive molecules that could be exploited in the bio-control of phyto-pathogens of tubers crops, which are the main staple food in most tropical countries.

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Comparative effectiveness of chemical biocides and Acalypha wilkesiana leaf extract against postharvest fungal deteriogens of sweet orange (Citrus sinensis) fruits

Abstract: View related articles View Crossmark data Full Length Article Comparative effectiveness of chemical biocides and Acalypha wilkesiana leaf extract against postharvest fungal deteriogens of sweet orange (Citrus sinensis) fruits

Cited by 4 publications

References 28 publications

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of <i>Botryodiplodia theobromae</i> (Pat.)

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of <i>Botryodiplodia theobromae</i> (Pat.)

Fungi associated with a dry invasive white patches on trunks of economic fruit trees in south-west Nigeria

Phytochemical Content and <i>In Vitro</i> Antimycelial Efficacy of <i>Colocasia esculenta</i> (L), <i>Manihot esculenta</i> (Crantz) and <i>Dioscorea rotundata</i> (Poir) Leaf Extracts on <i>Aspergillus niger</i> and <i>Botryodiplodia theobromae</i>

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Comparative effectiveness of chemical biocides and Acalypha wilkesiana leaf extract against postharvest fungal deteriogens of sweet orange (Citrus sinensis) fruits

Abstract: View related articles View Crossmark data Full Length Article Comparative effectiveness of chemical biocides and Acalypha wilkesiana leaf extract against postharvest fungal deteriogens of sweet orange (Citrus sinensis) fruits

Cited by 4 publications

References 28 publications

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of &lt;i&gt;Botryodiplodia theobromae&lt;/i&gt; (Pat.)

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of &lt;i&gt;Botryodiplodia theobromae&lt;/i&gt; (Pat.)

Fungi associated with a dry invasive white patches on trunks of economic fruit trees in south-west Nigeria

Phytochemical Content and <i>In Vitro</i> Antimycelial Efficacy of <i>Colocasia esculenta</i> (L), <i>Manihot esculenta</i> (Crantz) and <i>Dioscorea rotundata</i> (Poir) Leaf Extracts on <i>Aspergillus niger</i> and <i>Botryodiplodia theobromae</i>

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Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of <i>Botryodiplodia theobromae</i> (Pat.)

Effect of Water-Soluble Fraction of Petroleum Hydrocarbon on the Growth and Sporulation of <i>Botryodiplodia theobromae</i> (Pat.)