β Scribed by I. R. Minchinton; D. L. Jones; J. P. L. Sang
No coin nor oath required. For personal study only.
Examination of samples of deep litter poultry manure which caused growth deformation in vegetable crops resulted in the isolation of a potent phytotoxic compound. The chemical properties and symptoms produced by tomato plants grown under hydroponic conditions, showed that it was not 2,4βD as suggested by other workers but a nitrogen heterocyclic compound with an attached carboxyl group.
Poultry trials have shown that an impurity, 4βaminoβ3,5βdichloroβ2,6βlutidine, in the coccidiostat clopidol (3,5βdichloroβ2, 6βdimethylβ4βpyridinol) causes similar phytotoxicity. Increased potency after poultry ingestion indicates that this impurity is metabolised. The most likely metabolite is 4βaminoβ3,5βdichloroβ6βmethyl picolinic acid. Chemical and physical data of the metabolite are identical to that of the toxic compound isolated from original manure samples.
Detailed symptomology produced by the toxic manure on tomato plants is described.
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