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<u><strong> </strong></u><p>A colorimetric assay for the detection of DNA fragments associated with the oil palm pathogen Ganoderma boninense is reported, which is based on the aggregation of DNA-nanoparticle conjugated in the presence of complementary DNA from the pathogen. Here, various designs of DNA-nanoparticle conjugates were evaluated, and it was found that the best design gave a visually observable colour change with as little as 2 pmol of double-stranded DNA analyte even in thedoi:10.26434/chemrxiv.9248825.v2 fatcat:hxaurnfmj5aydgo3l3es6pfuiq