http://orgprints.org/7480/ Intercropping systems - Optimising crop protection and reducing competition In this study the effects of intercropping on the turnip root fly, Delia floralis Fall. (Diptera: Anthomyiidae), was studied in an intercropping system with cabbage (Brassica oleracea) and red clover (Trifolium pratense). Both the effects on egg laying, and the effect of natural enemies was studied. To overcome the problem of competition in the intercropping system, different understorey crops were evaluated with the aim to find species that have a low competitive force on cabbage. The possibility to minimize competition further with root pruning of the understorey species, was also investigated. Björkman, Maria Båth, Birgitta Hambäck, Peter Rämert, Birgitta Thorup-Kristensen, Kristian 1organics se_slu_ecology int_conf_joint2006_4 Intercropping systems - Optimising crop protection and reducing competition 2006-05-09 Björkman, Maria; Båth, Birgitta; Hambäck, Peter; Rämert, Birgitta and Thorup-Kristensen, Kristian (2006) Intercropping systems - Optimising crop protection and reducing competition. Joint Organic Congress, Odense, Denmark, May 30-31, 2006. source