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Essential oil of Melaleuca alternifolia was tested for antiviral activity against Tobacco Mosaic Virus. When applied to plants of Nicotiana glutinosa as a pre-inoculation spray at 100, 250 and 500 ppm, the oil was effective in significantly decreasing lesion numbers for at least 10 days post inoculation.
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C.D. Bishop (1995) studied this question.
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