Abstract
ATTEMPTS to discover the presence of a foreign organism in such diseases as tobacco-mosaic, tomatomosaic, leaf-roll of potato, and numerous other similar infectious diseases have been the concern of botanists for many years. Although considerable knowledge has been gained as to the distribution of these diseases by insects such as Aphides, yet no causal organism has been observed with certainty, and the diseases have been classed accordingly as virus diseases. The failure to detect the presence of a foreign organism has naturally been a serious handicap in combating these diseases, many of which are of serious economic importance.
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LACEY, M. Protozoa and Virus Diseases of Plants. Nature 112, 280–281 (1923). https://doi.org/10.1038/112280a0
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DOI: https://doi.org/10.1038/112280a0
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