LEAF BORON CONTENTS AND BITTER PIT IN APPLE

Trials were carried out for 3 years in different pedo-climatic environments of the Northern Italy by applying a nitrogenous fertilizer containing boron (20.0.0 + 7B₂O₃) on boron deficient soils.
From this investigations, it was possible to get out the influence of boron on bitter pit incidence both at harvest and post storage of apples.
In particular, the investigations that concerned 11 apple cultivars (Cooper 7SB2, Eden Spur, Golden Del., Granny Smith, Hy Early, Nero Red Rome, Red Chief, Red Spur, Sali Spur, Walter Wood and Wayne Spur) pointed out a bitter pit decrease when boron was applied, but no clear and significant relationships were observed between leaf and fruit boron contents and bitter pit incidence.

International Symposium on Diagnosis of Nutritional Status of Deciduous Fruit Orchards

G. Granelli, V. Ughini

https://doi.org/10.17660/ActaHortic.1990.274.17