Shoot Suppression of Lonicera × heckrottii ‘Goldflame’ (Goldflame Honeysuckle) Using Growth Retardants

Abstract A study conducted in 1999 and 2000 determined the effects of B-Nine/Cycocel (daminozide/chlormequat chloride) tank mixes at 2500/1500, 5000/1500 (1999 only), and 7500/1500 parts per million (ppm) and Cutless (flurprimidol) at 50, 100, and 150 ppm on shoot length and shoot number of pruned and non-pruned Lonicera × heckrottii ‘Goldflame’ (Goldflame honeysuckle). In 1999, B-Nine/Cycocel suppressed shoot lengths of pruned plants linearly throughout the study 18–30% 2 weeks after treatment (WAT), 16–28% 4 WAT, 24–35% 6 WAT, 24–34% 10 WAT, and 19–33% 14 WAT compared to untreated controls. Similar shoot length suppression was observed in non-pruned plants from B-Nine/Cycocel treatments in 2000 with shoots 8–24% (2 WAT), 7–24% (4 WAT), 7–20% (6 WAT), 5–19% (10 WAT), and 5–20% (14 WAT) shorter than those of untreated controls. Cutless was ineffective in suppressing shoot length of Goldflame honeysuckle in either experiment, but did increase shoot number compared to controls 6 through 14 WAT in 1999. B-Ni...