| Traditionally, in the US, hops are grown in the field in northern latitudes without the use of plant growth regulators (PGR). This research was to find out if the use of PGR could sufficiently reduce the height of hop vines to allow them to be grown in a greenhouse and produce similar flower yield of those grown in the field at northern latitudes. The hop cultivar Cascade was chosen for this study after it was compared in a preliminary trial with 'Perle', 'Fuggle' and 'Magnum'. In that initial trial, 'Cascade' produced the highest yield and appeared to be better adapted for growth under greenhouse environments using hydroponics. Of the four PGR's (Sumagic, Cycocel, B-9, and A-Rest) evaluated, only Sumagic had any effect on reducing vine length. Treatments that yielded the highest reduction in vine length (325 cm) was Treatment... |
