Abstract
Roots of 1-year old dwarf (Prunus persica ‘July Elberta’ budded on Prunus tomentosa) peach trees were dipped in solutions of 100 ppm indole-3-butyric acid (IBA) with and without starch-polyacrylate gel in the treatment solution prior to planting in beds of 1:1 peat:perlite or in the field. Four weeks after treatment, plants treated with 100 ppm IBA with or without gel had 4 to 5 × the dry weight of new roots as did controls. Treatment with 100 ppm IBA plus gel increased the number of new roots by 62% over controls. During the first season in the field, plants treated with gel with or without IBA produced longer shoots than controls. During the second season, plants originally treated with 100 ppm IBA alone produced significantly longer shoots than any other treatment while those treated with IBA/gel were not different from controls. In a separate expenment, DMSO (dunethyl sulfoxide) and DMF (dimethyl formamide) at 0.4% in the treatment solution had no apparent influence on IBA-induced root initiation.
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