Thin to optimise

September 2009 | Written by Dr Sally Bound | Future Orchards® article

“Thin to optimise” focuses on the role of thinning in balancing crop load, fruit size, fruit quality and return bloom. Dr Sally Bound’s resource forms part of the Future Orchards® crop-loading program and reinforces that thinning should be managed against a defined production target rather than treated as a routine operation performed the same way every season.

The practical objective is to leave enough fruit to achieve the desired yield while avoiding a crop load that suppresses fruit size, colour, maturity or the development of flower buds for the following year. The timing and intensity of thinning therefore need to reflect variety, tree strength, flowering intensity, seasonal conditions and the market specifications being targeted.

For orchard teams, the resource supports a measured approach: establish target fruit numbers, assess the crop after chemical thinning, and use hand thinning to correct remaining variation. This makes thinning a tool for optimising marketable yield and biennial-bearing risk rather than simply reducing fruit numbers.