Abstract
Abstract Spray applications of 1000 and 2000 ppm Promalin to scion growth of first year nursery trees of ‘Bartlett’ pear (Pyrus communis L.), ‘Bing’ cherry (Prunus avium L.), and ‘Oregon Spurr II Delicious’ apple (Malus domestica Borkh.), when scion growth was 40 to 60 cm, generally caused increased lateral branching in the nursery. Double applications of Promalin at reduced concentrations also showed promise. Chemical treatments usually affected neither branch angle or length on pear, often increased branch angle on apple, and often increased both length and angle on cherry. Tree height and caliper usually were unaffected, Chemical name used: GA4+7 + BA (Promtalin).
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