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Investigating the Cytokininlike Properties of Benomyl: Laboratory Growth Studies. D. W. Beckerson, Department of Horticultural Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1. D. P. Ormrod, Department of Horticultural Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1. Plant Dis. 70:55-58. Accepted for publication 21 June 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-55.

Growth and development studies with seven vegetable crops in a controlled environment showed that benomyl 50 WP was ineffective as a growth-promoting compound regardless of concentration and method of application (foliar spray or a root drench). Although benomyl exhibited a peak in stimulating chlorophyll synthesis in cucumber leaf disks at 1,000 mg a.i. L1 there was no senescence (i.e., visible chlorosis and/or necrosis) retardation of leaf disks of the seven species floated on benomyl solutions ranging in concentration from 0 to 2,500 mg L1. Leaf disks floated on 2,500 mg L1 showed earlier and more chlorosis and necrosis than the other treatments.