Vol. 14 No: 3

Title:
The Use of Borax in the Control of "Internal Cork" OF Apples

Authors:
H.O. ASKEW, E. CHITTENDEN and T. RIGG

pp: 227

Abstract:
PREFACE.

The work recorded in the following papers by Messrs. Askew and Chittenden constitutes a part of a series of investigations relating to boron deficiency in New Zealand crops.

In the present paper the work concerns solely a physiological ailment of apples known as "Internal Cork". The investigations are in continuation of the co-operative work of the Dept. of Sci. & Ind. Research and the Cawthron Institute to ascertain the cause of this ailment and to recommend practical measures for its control. "Internal Cork" has been an acute problem for a number of years to orchardists in certain parts of the Nelson District. In a previous publication of the Institute the occurrence of the ailment has been described and its association, in the severe form, with certain phases of the Moutere Hills soil and a granite soil at Umukuri has been noted.

During the 1934–35 season of the co-operative investigations it was shown that

1. The injection of certain boron compounds into affected trees was

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