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The influence of root rot
incidence on cassava genotype on consumers’ acceptability of
the gari produced from it
S. O. Aigbe* and S. U. Remison
Department
of Crop Science, Ambrose Ali University, PMB 14 Ekpoma,
Nigeria.
*Corresponding author. E-mail:
soaigbe@yahoo.com.
Tel.: +2348032110849.
Accepted 4
June, 2009 |
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In Nigeria cassava root rot causes serious yield losses in
cassava tuber production every year. However, the influence
of root rot incidence on cassava genotype at harvest on
consumers’ acceptability of the gari produced from it has
not been studied. A sensory evaluation was conducted on gari
processed from the tuberous root yield of rot susceptible
TME-1 and improved TMS 30572, harvested at 12 months after
planting at Sabongidda-Ora (humid forest eco-zone) of
Nigeria during the 2003 and 2004 cropping seasons. A 5-point
hedonic scale ranging from like extremely, through neither
like nor dislike, to dislike extremely was designed to
measure the degree of liking for the gari processed from
both genotypes. 28 panelists were asked to indicate their
degree of preference for the colour, odour and taste of each
gari sample by choosing the appropriate category in the
hedonic scale. The results were compared with the tuberous
root rot incidence and severity of genotypes in the field.
All experiments were repeated and the data collected were
statistically
analysed
using the general linear model statistical procedures with
the SAS system for windows. Comparisons among treatment
means was done with the least significant square, with the
Duncan multiple range test (P = 0.05). Variety TME-1 with
the highest root rot incidence and severity of 53 and 21%
respectively was less preferred for gari colour, texture and
odour compared to TMS 30572 which had 15 and 6% rot
incidence and severity respectively. In the second year
trial where TME-1 still possessed the highest rot incidence
and severity, panellists still showed more preference for
the colour, taste and odour in TMS 30572 gari than TME-1
gari. All the differences observed and reported above
between TMS 30572 and TME-1 were significantly different at
probability 0.05%. The results of this experiment clearly
show that high root rot incidence of a cassava genotype in
the field can reduce consumer’s acceptability of the gari
produced from it.
Key
words:
Manihot esculenta Crantz., Botryodiplodia
theobromae, sensory evaluation, Fusarium spp.,
Nigeria. |
