Efficacy of different spray practices and fungicides against Sclerotinia rot of cabbage

Abstract

We tested multiple-nozzle fungicide spray booms with or without swinging the boom to assess their efficiency for spray coverage on cabbage and/or efficacy of the fungicide against Sclerotinia rot of cabbage. Tests with water-sensitive paper showed that sprays without swinging the booms provided better coverage of young cabbage plants and cabbage heads than sprays with boom swinging. Disease incidence after sprays of an iprodione suspension without swinging the boom was 50% less than that after sprays with swinging. Thus, control efficacy of fungicide sprays is higher when the booms are not swung, at least against Sclerotinia rot of cabbage.