Prohexadione-calcium decreases fall runners and advances branch crowns of 'Chandler' strawberry in a cold-climate annual production system
Journal of the American Society for Horticultural Science
Balancing vegetative growth with fruiting is a primary concern in strawberry (Fragaria x ananassa Duch.) production. Where nursery plant selection and preconditioning are inadequate for runner control, additional approaches are needed. The gibberellin inhibitor prohexadione-Ca was tested over two seasons for suppressing autumn runners of 'Chandler' plug plants in a cold-climate annual hill production system. Prohexadione-Ca was applied as a foliar spray at active ingredient concentrations ranging from 60 to 480 mg per liter, either as a single application or repeated at 3-week intervals. The lowest rate resulted in inadequate runner control, with some runners producing malformed daughter plants. Higher rates resulted in 57 to 93% reductions in fall runner numbers, with a concomitant increase in autumn branch crown formation. There were no effects of the prohexadione-Ca treatments on plant morphology the following spring, and no adverse effects on fruit characteristics or yield.
Black, B.L. 2004. Prohexadione-calcium decreases fall runners and advances branch crowns of 'Chandler' strawberry in a cold-climate annual production system. Journal of the American Society for Horticultural Science 129(4): 479-485.