Publication Date
1997
Description
Paclobutrazol was sprayed at a rate of 1 kg a.i./ha at and prior to flowering on swards of Trifolium subterraneum L. cv. Dalkeith over two years (1992 and 1993). There was no consistent effect of paclobutrazol on seed yield. Only at the earliest spraying time (20 days before flowering) in 1992 was there a significant increase in yield. Paclobutrazol increased burr and seed number for all spraying times in both years. However, the general absence of a yield response was due to a decrease in seed size in both years. The ratio of surface to buried seed yield and number (measured in 1992) increased with application of paclobutrazol. In fact, most of the increase in seed number was in the surface component. These results are discussed with respect to other paclobutrazol studies and commercial seed production.
Citation
Virgona, J M., "The Effect of Paclobutrazol on Seed Yield Components of Trifolium subterraneum" (2024). IGC Proceedings (1997-2023). 15.
https://uknowledge.uky.edu/igc/1997/session25/15
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
The Effect of Paclobutrazol on Seed Yield Components of Trifolium subterraneum
Paclobutrazol was sprayed at a rate of 1 kg a.i./ha at and prior to flowering on swards of Trifolium subterraneum L. cv. Dalkeith over two years (1992 and 1993). There was no consistent effect of paclobutrazol on seed yield. Only at the earliest spraying time (20 days before flowering) in 1992 was there a significant increase in yield. Paclobutrazol increased burr and seed number for all spraying times in both years. However, the general absence of a yield response was due to a decrease in seed size in both years. The ratio of surface to buried seed yield and number (measured in 1992) increased with application of paclobutrazol. In fact, most of the increase in seed number was in the surface component. These results are discussed with respect to other paclobutrazol studies and commercial seed production.
