experiments were carried out to investigate the fungitoxic potentials of some
plant extracts and Trichoderma harzianum in
the management of post-harvest fungal deterioration of potato. The experiments
were laid out in Completely Randomized Design (CRD) and replicated three times
and data collected were subjected to analysis of variance (ANOVA) using Genstat
discovery edition 1.Significant treatment means were seperated using Fisher’s
least Significance Difference L.S.D at 5% level of probability. Pathogenicity
test revealed that Aspergillus niger, Rhizopus
stolonifer Aspergillus flavus, Fusarium oxysporum and Alternaria solani caused
rot on potato tubers by utilizing the substrate for their growth development. A. niger was found to be more virolent
having the highest rot incidence of 77.5%, followed by R. stolonifer, A .flavus and F. oxysporum with rot incidence of
66.5%, 59.7%, 53.3% respectively, whereas the A. solani depicted a lower pathogenic effect with rot incidence of
33.6%. The result of the inhibitory potentials of the extracts of A. indica, M. oleifera (stem), M. oleifera (leaves) and C. odorata against the five fungal
pathogens showed significant differences (P<0.5) in their rates of fungitoxicity on A. niger, A. flavus, R. stolonifer, F.
oxysporum and A. solani. The effect of
A. indica extract gave the highest means inhibitory effect of 65.4% on A. niger while the least means growth
inhibition of 18.4% was recorded by C.
odorata extract on R. stolonifer.
The results obtained when plant extracts were applied after inoculation with
spore suspension fungi isolates showed high significant effect in rot incidence
and severity. C. odorata was less
effective in controlling the mycelial growth and thus, had the highest
percentage diseases incidence of 50.2% .The lowest incidence of rot (21.6%) was
recorded with A. indica extract. R. stolonifer showed a stronger
resistance to the plant extracts than A.
niger, A. flavus, F. oxysporum and A. solani. Results obtained from
laboratory screening of T. harzianum for
antagonism towards fungal isolates of potato tuber rot, showed that mutual
inhibition was observed whenT. harzianum
was co-inoculated with -A. solani, A. niger,
A. flavus and F. oxysporum,
while R. stolonifer overgrew the mycelium of T. harzianum on a PDA. The results of this study have shown the
fungitoxic potential of these plants materials and antagonistic effects of T. harzianum in the control of the
postharvest rot of potato which could be exploited as alternative to synthetic
fungicide in the control of potato rot incited by fungal rot organisms
ANOZIE, A (2022). Control of fungal pathogens of potato (solanum tuberosum .l.) Using botanicals and trichoderma harzianum. Repository.mouau.edu.ng: Retrieved Feb 07, 2023, from https://repository.mouau.edu.ng/work/view/control-of-fungal-pathogens-of-potato-solanum-tuberosum-l-using-botanicals-and-trichoderma-harzianum-7-2
ANOZIE, ANOZIE. "Control of fungal pathogens of potato (solanum tuberosum .l.) Using botanicals and trichoderma harzianum" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 17 Nov. 2022, https://repository.mouau.edu.ng/work/view/control-of-fungal-pathogens-of-potato-solanum-tuberosum-l-using-botanicals-and-trichoderma-harzianum-7-2. Accessed 07 Feb. 2023.
ANOZIE, ANOZIE. "Control of fungal pathogens of potato (solanum tuberosum .l.) Using botanicals and trichoderma harzianum". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 17 Nov. 2022. Web. 07 Feb. 2023. < https://repository.mouau.edu.ng/work/view/control-of-fungal-pathogens-of-potato-solanum-tuberosum-l-using-botanicals-and-trichoderma-harzianum-7-2 >.
ANOZIE, ANOZIE. "Control of fungal pathogens of potato (solanum tuberosum .l.) Using botanicals and trichoderma harzianum" Repository.mouau.edu.ng (2022). Accessed 07 Feb. 2023. https://repository.mouau.edu.ng/work/view/control-of-fungal-pathogens-of-potato-solanum-tuberosum-l-using-botanicals-and-trichoderma-harzianum-7-2