Researchers have published a study in Agriculture, Ecosystems & Environment that shows planting strips of perennial flowers between orchard rows can help with pest control. Trials in seven European countries showed higher numbers of natural enemies in orchards with perennial flower strips, and they also found reduced fruit damage in those orchards. In particular, there were fewer codling moths in the orchards with flowers rather than conventional orchard vegetation. The study also made recommendations for flower-strip composition for different countries.
source: ATTRA