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Summer Mechanical Hedging to Prune Eight Cider Apple Cultivars

Summer Mechanical Hedging to Prune Eight Cider Apple Cultivars

The results of a study by researchers at Washington State University published in the journal HortTechnology, show that summer mechanical hedging could significantly reduce pruning labor time and costs in cider apples. To date, cider apple orchard management has followed the same guidelines as dessert apples, with all pruning done by hand. This can represent about 20–25% of total labor costs.

A limited pool of workers with pruning experience and rising wages pose financial barriers to cider  orchard operators. Mechanical hedgers are a relatively low-cost technology and often only require one person to operate. However, maintaining  productivity and quality can vary by  and should receive further study.

Mechanical hedging is a form of nonselective heading pruning. Because the eight different cultivars used in this study differ in tree canopy structure, planting density, age of growth, and topography, they each responded to it a little differently. It was difficult to have a consistent pruning routine. The time to hedge per tree depended on planting density as well as driving speed of the hedger, proficiency of the hedger driver, and age of the biomass being removed.

When compared to hand pruning, mechanical hedging was shown in this study to be a significant time saver. However, the speed of the mechanical hedging varied and there were significant differences by cultivar in the amount of biomass removed, fruit removed per tree including fruit diameter and weight in this study.

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