Methyl 1-butyl-carbamoyl-2-benzimidazole carbamate (benomyl) as a dilute foliar spray reduced atomspheric oxidant injury (oxidant stipple) on ‘Ives’ and ‘Concord’ grapevines (Vitis labrusca L.) in 3 vineyard experiments in 1972. Three to 7 multiple applications at 1.12, 3.36, and 6.72 kg/ha increased the protection over unsprayed ‘Concord’ vines. Single and double applications were ineffective. The degree of protection afforded was directly related to the frequency of benomyl application.
Received for publication June 6, 1973. Approved by the Director of the New York State Agricultural Experiment Station, Geneva, N. Y., for publication as Journal Paper No. 2037. The authors wish to express their appreciation to Mr. S. G. Carpenter and Mr. D. E. Crowe for their technical assistance, to the E. I. DuPont deNemours Co. for their generous gift of benomyl and to Mr. Stewart Christy and Mr. Robert Morrison for their cooperation.