CAUSES OF SOIL SICKNESS IN REPLANTED PEACHES : II. CAUSAL AGENTS FOR THE SPECIFICITY OF THE DISEASE

The replanting of peach (Prunus persica (L.) Batsch) trees in old peach soil resulted in an increase in the liberation of hydrocyanic acid (HCN) from a suspension of the soil in an amygdalin solution, compared to a suspension of identical, but not replanted soil.
Planting apple trees in the peach soil gave a similar result.
However planting pomegranate (Punica granatum L.) trees caused no increase in the HCN evolution.

The mortality and growth reduction obtained by the application of cyanide to young apple trees was smaller than that obtained with peaches and particularly with almonds (Prunus amygdalus Batsch.). Detrimental effects of benzaldehyde on the two latter species were relatively slight and with apples were equal to that obtained by cyanide.

Workshop on Replant Problems with Fruit Trees

Y. Cohen, A. Gur

https://doi.org/10.17660/ActaHortic.1988.233.5