The Journal of Horticultural Science & Biotechnology
Vol. 14 No: 3
The Use of Borax in the Control of "Internal Cork" OF Apples
H.O. ASKEW, E. CHITTENDEN and T. RIGG
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
- The injection of certain boron compounds into affected trees was
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