Prebloom thinning of Thompson seedless grapes is feasible when followed by bloom spraying with gibberellin

Prebloom thinning of Thompson seedless grapes is feasible when followed by bloom spraying with gibberellin

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THOMPSON SEEDLESS Candle Holder GRAPES must bethinned to allow production of loose clusters of well-developed berries.In recent years, the usual shatter-stage thinning has become a major labor-consuming operation for the grower.Hand thinning during the prebloom period, while foliage is light, clusters are D-Mannose small, and shoots are 12 to 16 inches long, would be economically desirable but has not been practical because of the increase in berry set, resulting in tight clusters.