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Published in Crop Sci 6:601-604 (1966)
© 1966 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Testing Birdsfoot Trefoil, Lotus corniculatus L., For Varietal Purity III The Use of N-dimethylaminossuccinamic Acid to Induce Varietal Differences1

L. W. Nittler and T. J. Kenny2

The possibility of using chemicals to accentuate varietal differences in birdsfoot trefoil was investigated. Preliminary experiments with several chemicals showed that foliar applications of N-dimethylaminosuccinamic acid (B-995) could be used to cause ‘Empire’ plants to differ from ‘Viking’ and common European plants in growth habit, stem number and stem length. Treated Empire plants were shorter or more nearly recumbent than Viking or European plants. Results of using this chemical on greenhouse grown plants varied from one time of the year to another. Growth chamber experiments were conducted to determine what environmental conditions were responsible for this variation. Long photoperiods or low light intensity did not reduce the effectiveness of the chemical. High dark period temperatures or light from incandescent bulbs did reduce its effectiveness. A combination of high dark period temperature with low light intensity or with light from incandescent bulbs drastically reduced the effect of the chemical. Under these conditions increasing the concentration of B-995 did not increase its effectiveness. One or 2 additional foliar sprays at 3-day intervals did increase its effectiveness

1 Contribution from the Department of Seed Investigations, New York State Agricultural Experiment Station, Cornell University, Geneva, New York. Approved by the Director for Publication as Journal Paper No. 1445 June 23, 1965. This study was part of a Northeast Regional Project (NEM-22), a cooperative study involving agricultural experiment stations in the Northeast Region and was supported in part by regional funds.

2 Professor and Seed Technologist, respectively.

Received for publication June 26, 1965.




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