Foliar Sprays of Silicon Dioxide-containing Compound Reduce Russeting in ‘Golden Delicious’ Apple Fruits1

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Abstract
Single and multiple foliar sprays of a commercial formulation containing silicon dioxide, when applied on ‘Golden Delicious’ starting at the petal fall stage, significantly reduced fruit russeting. In 4 trials the 2-spray treatment (petal fall and petal fall + 8 to 10 days) gave better control than a single application at petal fall. In a single trial a third application 21 days after petal fall gave no further reduction in russet. The treatments did not significantly alter fruit size, shape, seed number or maturity date.

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