Koohakan, Prommart

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Koohakan, Prommart
Alternative Name
Koohakan, P.
Main Affiliation
Email
prommart.ko@kmitl.ac.th

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    Item type:Publication,
    Characterization of Phytopythium and Pythium species from freshwater area based on Morphological traits and ITS sequence
    (2023-07-01)
    Maiprom, N.
    ;
    Saelee, R.
    ;
    Koohakan, P.
    Twenty isolates were identified as Globisporangium nunn, Pythium acanthicum, Phytopythium chameahyphon, Phytopythium cucurbitacearum, Phytopythium helicoides, Phytopythium iriomotense, Pythium torulosum, Phytopythium vexans and unknown specific epithet Phytopythium species. The reconstruction of phylogenetic trees using Neighbourjoining, maximum-likelihood, and maximum-parsimony algorithms revealed that the majority of isolates belonged to clade K. Furthermore, this is the first report of Phytopythium iriomotense in Thailand. The current information possible that the discovered oomycetes will be useful in future research and applications.
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    Bioactivity of teak (Tectona grandis L.f.) and cajeput (Melaleuca cajuputi Powell) leaf extracted on inhibition fruit fungal pathogens
    (2023-09-01)
    Suwandee, S.
    ;
    Saelee, R.
    ;
    Koohakan, P.
    ;
    Montri, N.
    Results showed that cajeput oil at 10,000 ppm had the highest inhibitory effect on the mycelial growth of all tested fungi, with an inhibition rate of 92.5%. It was followed by cajeput crude extract at 20,000 ppm and teak crude extract at 25,000 ppm, with inhibition rates of 88.6% and 67.0%, respectively. Thus, cajeput oil and cajeput extract showed promising potential in controlling fruit fungal pathogens. Effective concentration (EC<inf>50</inf> and EC<inf>90</inf>) of each extract suggested that the lowest concentration to inhibit mycelial growth, spore germination and spore formation were in between 50-90%, which the concentration range between 100 to 30,000 ppm depending on the extracts and pathogen species. This finding could be useful in evaluating the appropriate concentration of each extract for controlling plant pathogenic fungi.