Brief Papers: Effect of Borax Applications on the Incidence of Rust on Flax.

نویسنده

  • H G Heggeness
چکیده

During the course of current investigations on the effect of minor elements on the nutrition of flax it has been observed that applications of boron, as sodium tetraborate, to field plots have essentially prevented the development of rust (Melampsora lini) on Bison and Redwing flax. The borax was applied in solution at the rate of sixty pounds to the acre, on May 23, two weeks after germination. This concentration of borax resulted in some burning of the leaf tips, but it may be possible to reduce the concentration somewhat without losing the protective effect. The following table, data of which were secured on July 25 (five weeks after the initiation of flowering) bears out the conclusion of rust protection in the borax plots. The few rust pustules that did occur in the boron plots were not well developed, but remain very small. If the leaves were cleared with 80 per cent. alcohol, many points of infection could be seen, but for the most part they failed to develop. The data for the table below were secured by observation of the plants in the field, no leaves being cleared in alcohol; hence the percentage of rust was estimated as zero in the borax plots.

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عنوان ژورنال:
  • Plant physiology

دوره 17 1  شماره 

صفحات  -

تاریخ انتشار 1942