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  • Author or Editor: N. J. Shaulis x
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Abstract

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.

Open Access

Abstract

Widespread stippled browning and premature senescence of leaves of grapevines were observed in grape growing regions near the Great Lakes. Those symptoms were identical to those obtained by exposing 2-year old potted ‘Concord’ and ‘Ives’ grapevines to 30 or 60 pphm ozone (O3) for 6 hr, indicating that the brown leaf disorder of grapevines is oxidant stipple, a manifestation of O3 injury.

Open Access