A biometric evaluation of the growth-regulating and herbicidal properties of some organic compounds
1947
Fults, J.L. | Payne, M.G.
The growth-regulating properties of 74 chemicals were investigated by a modification of Went's pea test. Results were statistically analysed and classified, using the reaction of 2,4-D as the standard. A quantitative herbicidal test on castor bean plants is described and illustrated. A group of 26 chemicals, selected from the pea test, were studied for their herbicidal action using the castor bean test. Chemicals were arranged according to their decreasing activity. A procedure for selecting organic compounds with herbicidal properties similar to 2,4-D was suggested. This involved the use of both the pea test and the castor bean test. The value of comparing the growth-regulating and herbicidal properties of chemicals on a molar basis was emphasized. The weakness of comparing chemicals at a single concentration was pointed out, and the advantages of making comparisons over a wide concentration range were shown.
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