Abstract
THE herbicide 2,4-D (2,4 dichlorophenoxyacetic acid) has been recorded to affect fungal-host relationship. Ibrahim1 demonstrated a reduction in the number of rust uredosori to one-fifth on treated oat plants compared with controls. Similarly, Crowdy and Wain2 recorded a suppression in bean chocolate-spot disease treated with 2,4,6 trichlorophenoxyacetic acid. On the other hand, wheat plants treated with 2,4-D were found to be weakened, stunted and predisposed to a heavier infection with Helminthosporium sativum 3. 2,4-D has been recorded to cause a depletion in the carbohydrate content of treated plants4,5; Weller and co-workers6 observed a depletion of non-reducing sugars.
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References
Ibrahim, I. A., Phytopath., 41, 951 (1951).
Crowdy, S. H., and Wain, R. I., Ann. App. Biol., 38, 318 (1951).
Hsia, Y. T., and Christensen, J. J., Phytopath., 41, 1011 (1951).
Mitchell, J. V., and Brown, J. W., Bot. Gaz., 107, 120 (1945).
Wort, D. J., Amer. J. Bot., 36, 673 (1949).
Weller, L. E., and co-workers, Plant Physiol., 50, 289 (1950).
Gawadi, A. E., Ph.D. thesis, Cambridge (1935).
Menon, K. P. V., Ann. Bot., 48, 187 (1934).
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MOSTAFA, M., GAYED, S. Effect of Herbicide 2,4-D on Bean Chocolate-Spot Disease. Nature 178, 502 (1956). https://doi.org/10.1038/178502a0
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DOI: https://doi.org/10.1038/178502a0
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