Abstract
THE condition known as 'marsh spot' in peas has been proved by Piper1, using water cultures, to be due to manganese deficiency. An analogous condition in two varieties of broad beans (Wooster Mammoth and Jarvis) used for seed has been observed in the field in the United States by Orton and Henry2, who suggested that it resembled 'marsh spot' in peas, and by Furneaux and Glasscock3 in broad beans grown for seed on Romney Marsh. Similar symptoms in runner bean seeds submitted by a seed firm have been reported by Pethybridge4, who suggested manganese deficiency as a possible cause, and by De Bruijn5 at the Dutch Seed Testing Station in crops grown for seed.
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References
Piper, C. S., J. Agric. Sci., 31, 448 (1941).
Orton, E. R., and Henry, W. D., Phytopath., 25, 726 (1935).
Glasscock, H. H., private comm., 1944.
Pethybridge, G. H., J. Min. Agric, 43, 55 (1936).
De Bruijn, Tijdschr. Pl. Z. Kelt., 39, 281 (1933).
Wallace, T., "The Diagnosis of Mineral Deficiencies in Plants",and supplement in the press (London: H.M.S.O., 1943).
Hewitt, E. J., Long Ashton Research Station Annual Report, 1943, and ibid. 1944 (to be published).
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HEWITT, E. 'Marsh Spot' in Beans. Nature 155, 22–23 (1945). https://doi.org/10.1038/155022b0
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DOI: https://doi.org/10.1038/155022b0
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