Based on grower crop loss data from 1985–1987 and field and storage assessments from 1987, important pests and diseases of organic vegetables in Denmark are identified. The most important pests are cabbage root fly (Delia radicum), onion neck rot (Botrytis allii) and carrot rust fly (Psila rosae). The organic growers employ cultural plant protection methods such as placement and timing of crops, crop rotation, crop selection and field sanitation extensively, while direct control methods are rarely applied. Growers' perceptions of pest problems and crop loss due to pest and disease damage in organically grown vegetables change with marketing patterns and quality demands.