VIEW ARTICLE

Disease Control and Pest Management

Distribution and Persistence of Methyl 2-Benzimidazole Carbamate Phosphate Injected into American Elms in Late Spring or Early Fall. J. E. Elliston, Assistant pathologist, The Connecticut Agricultural Experiment Station, New Haven 06504; G. S. Walton, pathologist, The Connecticut Agricultural Experiment Station, New Haven 06504. Phytopathology 69:1235-1239. Accepted for publication 14 June 1979. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-1235.

Distribution and persistence of methyl 2-benzimidazole carbamate phosphate (MBC-PO₄) injected into American elms in late spring depended on rate of application but was independent of carrier volume over the ranges of application rates and volumes studied. The amount of MBC-PO₄ in leaves and twigs of trees injected in late spring decreased rapidly during the 3–4 mo after injection. Distribution and persistence were best with 6 and 12 times the recommeded rate for prophylaxis. The chemical was not detected in the spring following treatment. MBC-PO₄ injected into plantation elms in early fall persisted over winter and was well distributed in new growth the following spring.