Volume 61 Number 4 Article 24
Year 2007 Month 10
Title: Crop Load Management of Apple Via Induced Plant Stress
Authors: T.R. Schmidt and R.C. Elfving
Abstract:
Commercial apple (Malus × domestica Borkh.) growers face economic pressures which compel them to minimize
production costs.
Effective chemical thinning programs significantly reduce labor expenses and increase financial
returns.
Research has shown bloom thinning programs based on lime sulfur or oil plus lime sulfur combinations
decrease fruit set while increasing fruit size and return bloom.
Damage to sensitive flower parts combined with
transient depression in carbon fixation likely reduce fruit set to levels beyond those seen with other caustic bloom
thinners which do not significantly impact photosynthesis.
Implications of stress-inducing chemical thinning
programs are discussed.
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