VIEW ARTICLE

Prevention of Dutch Elm Disease in Large Nursery Elms by Soil Treatment with Benomyl. Eugene B. Smalley, Department of Plant Pathology, University of Wisconsin, Madison, 53706; Phytopathology 61:1351-1354. Accepted for publication 16 June 1971. DOI: 10.1094/Phyto-61-1351.

Soil treatments with benomyl at concentrations of 308 to 382 kg/hectare applied to large nursery American elms prior to bud-break in the spring resulted in significant protection without phytotoxicity following inoculation with Ceratocystis ulmi. Thiabendazole [2-(4-Thiazolyl)-benzimidazole] at equivalent concentrations was inactive in these trials. Chemical analysis and bioassays failed to detect benomyl or antibiosis in branches cut from treated trees at the time of inoculation.