Browsing by Author "Sudau Eh Teet"

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    Antifungal activitity of Pennisetum purpureum extract on anthracnose pathogen, colletotrichum gloeosporioides of mango fruit
    (Terengganu: Universiti Malaysia Terengganu, 2013-09) Sudau Eh Teet
    This study was done to determine the effectiveness of Pennisetum purpureum Schumach. crude extract as antifungal agent in inhibiting the growth of anthracnose pathogen, Colletotrichum gloeosporioides Penz. of mango fruit. Extracts from leaves and stems of P. purpureum were extracted by using solvents of hexane, ethyl acetate and methanol to obtain the crude extracts. In vitro assay was performed using agar well diffusion method to determine the antifungal activity of the crude extracts of weed against the C. gloeosporioides. After 48 hours of the incubation period, the diameters of inhibition zones were measured.
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    Control of anthracnose disease of banana with inorganic salts
    (Universiti Malaysia Terengganu, 2008) Sudau Eh Teet
    Effects of sodium bicarbonate, calcium propionate, sodium metabisulfite, potassium carbonate and ammonium carbonate against mycelial growth of Colletotrichum gloeosporioides were evaluated in a in-vitro study. Sodium metabisulfite is found to be the most effective salt that exhibited fungicidal activity at the lowest concentration of 0.06% compared to the other salts. Post-harvest application of sodium metabisulfite to control infection of anthracnose on bananas caused by C. gloeosporioides was evaluated in a in-vivo study. The effectiveness of the treatments were assessed by evaluating their impact on physical-chemical parameters of fruits such as firmness, hue angle, chroma, total titratable acidity (TT A), total soluble solid (TSS), pH, vitamin C content, diameter of lesion and incidence. The bananas subjected to curative treatment using 2% sodium metabisulfite showed less fungus infection and greater flesh firmness as compared to other treatments. No significant difference was observed in the hue angles of bananas subjected to curative treatment and bananas injured before being dipped into salt with control. In addition, there were no significant differences in the chroma, TT A and vitamin C content among all treatments and control. However, the bananas subjected to protective treatment and untreated bananas showed higher value in TSS and pH compared to bananas subjected to curative treatment. This result suggests that curative treatment using sodium metabisulfite could provide a significant level of protection on bananas.