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In this study Cephaleuros virescens was found to be the causal organism of a leaf spot disease on Para rubber (Hevea brasiliensis). The algae caused circular orange to dark brown lesions on both leaf surfaces. The morphology of the algae (thallus, filamentous cells, sporangiophore, sporangia, gametangia and zoospore) were examined and found to consistently match the species Cephaleuros virescens.
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