obtained the highest rooting percentages at 10,000 ppm IBA with juvenile material. Various formulations of IBA or other auxins in combination could also be attempted in future experiments to promoting rooting.
Trench layering does show potential as a novel propagation system for the difficult-to-root pawpaw, and could be developed for rooting unique plant material at the KSU USDA-NCGR to maintain germplasm on its own roots. Both maturity and auxin concentration influenced rooting characteristics of pawpaw in a trench layering system. Trench layering was more successful in rooting more mature pawpaw material than any method examined so far, so it shows great promise in pawpaw propagation efforts.