Abstract
Abstract The growth inhibitors paclobutrazol and flurprimidol were applied to the roots of greenhouse-grown pecan seedlings [Carya illinoensis (Wangenh.) K. Koch] at 0, 0.02, 0.10, and 0.50 mg a.i. Treatment with paclobutrazol reduced tree height, stem weight, and increased the root:shoot weight ratio. Flurprimidol reduced tree height, leaf area, internode length, and stem weight. Promalin (50 ppm GA4+7 plus 6-benzylamino purine) applied as a foliar spray enhanced lateral branching, increased stem diameter and total dry weight, and reduced the root:shoot weight ratio. Paclobutrazol appeared to be more affective than flurprimidol in reducing shoot growth. Neither growth inhibitor significantly affected the rate of net photosynthesis.
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