BLACKBERRY TRELLISES
The Stiles bent fence (SBF) and single-sided shift trellis (SSST) are differently designed structures that function to isolate fruiting zones of summer-fruiting brambles on one side of the plant or row. The SBF and SSST are suited for use with cultivars that produce long, flexible, nonbranched canes. Summer pruning of stiff-caned, semi-erect types may encourage development of long, flexible lateral branches that are adaptable for training on these trellises; alternate-year cropping may be helpful where such pruning is necessary. The SSST operates on the same principles as our original single-sided trellis (SST), but the newer design is compatible with a broader range of commonly available construction materials. Construction plans will be published in a Virginia Agricultural Experiment Station Bulletin as soon as funds are made available. The SSST should allow greater manual harvest efficiency, more effective IPM, fewer yield losses to sunscald, compatibility with cultural management practices, lower costs of postharvest precooling, better condition of harvested fruit for maximum shelf life, and stronger prospects for machine harvesting of fresh-market brambles.