Studies on Biological Control of Postharvest Rot in Yams (Dioscorea spp.) using Trichoderma viride

Okigbo, R. N.; Ikediugwu, F.E.O.

doi:10.1111/j.1439-0434.2000.tb04786.x

Cited by 53 publications

(43 citation statements)

References 15 publications

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“…A. flavus and F. solani were observed to persist over a more prolonged duration with 2 and 3% rot, respectively ( Table 2). The observation is similar to the findings of Tronsmo andObalua andOti 2449 Dennis (1977) and Okigbo and Ikediagwu (2000) in their investigation on the effects of T. viride on post harvest Botrytis rot of strawberry and yam rot, respectively. The additional contribution of the extracellular metabolites of T. viride as a means of biocotrol is observed not only by the in vitro inhibition of spore germination of all the tested rot pathogens by the culture filtrate of the antagonist (Table 1), but also by the induction of a zone of inhibition by the antagonist against the colonies of the pathogens.…”

Section: Discussionsupporting

confidence: 78%

“…Each group were covered separately with sterile polyethylene sheets and incubated on raised plat forms for 5 days. The first groups inoculated with T. viride were further inoculated with B. theobromae, A. flavus, F. solani, R. oryzae and blank sterile water after 24 h. The concentration was 4.3 x 10 9 spores/ml at the rate of 10 ml of suspension per root according to Okigbo and Ikediagwu (2000). The second groups earlier treated with sterile distilled water were again inoculated with B. theobromae, A. flavus, F. solani, R. oryzae and blank sterile distilled water respectively (Table 2).…”

Section: In Vitro Screening Of the Antagonist On The Germinating Spormentioning

confidence: 99%

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Antagonistic properties of Trichoderma viride on post harvest cassava root rot pathogens

Ubalua¹,

A²,

Oti³

et al. 2007

Afr. J. Biotechnol.

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The effective in vitro screening tests of Trichoderma viride for antagonism against post harvest pathogens of cassava roots (Manihot esculenta Crantz) rot together with its competitive and mycoparasitic abilities informs its selection as the most promising candidate for the biocontrol of post harvest cassava root rot pathogens. While the percentage germination of the spores were observed to increase with increasing dilution of the culture filtrate (100, 50, 25, and 10% ) at a concentration of 20,000 spores/ml, the percentage rot recorded amongst the untreated cassava roots ranged from 4% (Rhizopus oryzae) to 44% (Aspergillus flavus). Treatment with the antagonist and the subsequent storage resulted in a remarkable reduction in the frequency of occurrence of the normal root surface mycoflora and the pathogens over a 3 weeks storage period. Botryodiplodia theobromae and R. oryzae were isolated only in the first week of storage and at a frequency of 3 and 2% rot, respectively, after treatment whereas A. flavus and Fusarium solani persisted throughout the whole storage period with 2 and 3% rot on the third week, respectively. The observed results suggest that T. viride is root surface competent and highly antagonistic.

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Section: Discussionsupporting

confidence: 78%

Section: In Vitro Screening Of the Antagonist On The Germinating Spormentioning

confidence: 99%

Antagonistic properties of Trichoderma viride on post harvest cassava root rot pathogens

Ubalua¹,

A²,

Oti³

et al. 2007

Afr. J. Biotechnol.

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“…Trichoderma species have a potential as biological control agents against seed and root rot pathogens and for the management of postharvest diseases (Papavivas 1985;Ghisalberti and Sivasithamparam 1991;Mortuza and Ilag 1999;Okigbo and Ikediugwu 2000). Some strains of Trichoderma had also been identified as potential biological control agents of plant pathogenic fungi on many crops including strawberries (Fragaria vesca T Jun), cucumbers (Cucumis sativus L.), tomatoes (Lycopersicon esculentum Mill.…”

Section: Introductionmentioning

confidence: 99%

Control of Postharvest Rots of Banana Fruits by Conidia and Culture Filtrates of Trichoderma Asperellum

Adebesin¹,

Odebode²,

Ayodele³

2009

Journal of Plant Protection Research

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Banana fruits are highly perishable and prone to microbial infection that cause significant damage. Fungicides and pesticides that are used to control this infection are toxic to man and animals, hence there is the need for environmentally friendly control measures of fruit rot pathogens. Simultaneous inoculation of fruits with Trichoderma species and rot pathogens resulted in rot on the fingers, but rot produced by T. asperellum NG-T161 alone or in combination with the pathogens was reduced, compared to rot produced by the pathogens alone. Treatment of fruits with conidia and culture filtrates of T. asperellum NG-T161 for 30 min prior to inoculation with the pathogens provided a better control than their simultaneous application. Only Trichoderma species were recovered on plated portions of rotted tissues from inoculations with the pathogens and the antagonists on the fruits. At 50% (v/v) the filtrates inhibited the mycelial growth of Fusarium oxysporum and Colletotrichum musae by 49.7 and 60.3% respectively but Lasiodiplodia theobromae was not inhibited. T. asperellum strains were found to be mycoparasitic on banana fruit rot pathogens. Conidia and culture filtrates of T. asperellum NG-T161 controlled the rot on banana fruits. It could be developed into a biopesticide for the control of postharvest banana fruit rot pathogens.

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“…Olurinola, et al [5] estimated microbial post harvest losses in yam at 40% while Okigbo and Ikediugwu [6] indicated that between 20 and 39.5% of stored tubers may be lost to decay. Studies have shown that fungal rot is the greatest cause of tuber loss in storage [7].…”

Section: Introductionmentioning

confidence: 99%

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2015

Review of Plant Studies

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Studies on Biological Control of Postharvest Rot in Yams (Dioscorea spp.) using Trichoderma viride

Cited by 53 publications

References 15 publications

Antagonistic properties of Trichoderma viride on post harvest cassava root rot pathogens

Antagonistic properties of Trichoderma viride on post harvest cassava root rot pathogens

Control of Postharvest Rots of Banana Fruits by Conidia and Culture Filtrates of Trichoderma Asperellum

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