Influences of Production Inputs on Incidence of Infection by Fusarium Species on Cereal Seed. R. A. Martin, Agriculture Canada, Research Station, Charlottetown, Prince Edward Island, Canada C1A 7M8. J. A. MacLeod, and C. Caldwell. Agriculture Canada, Research Station, Charlottetown, Prince Edward Island, Canada C1A 7M8, and Nova Scotia Agricultural College, Truro, Nova Scotia. Plant Dis. 75:784-788. Accepted for publication 10 January 1991. Copyright 1991 Department of Agriculture, Government of Canada. DOI: 10.1094/PD-75-0784.

Production inputs of supplementary nitrogen, fungicides, and plant growth regulator were evaluated on wheat and triticale cultivars (four site years) and on two- and six-row barley cultivars (two site years each) for effect on the incidence of Fusarium infection of the harvested seed. Supplementary nitrogen and a plant growth regulator increased, by up to 125%, the incidence of infection by Fusarium species of the seed. The use of a fungicide spray program had no effect on incidence of Fusarium infection. Triticale lines were more susceptible than wheat to Fusarium infection. Cadette was the most susceptible six-row barley cultivar to Fusarium, and Rodeo and Birka were the most susceptible two-row barley cultivars. Over the 2 yr, four major species were isolated: F. avenaceum, F. graminearum, F. sporotrichioides, and F. poae.