Harlequin bugs are active on certain annuals in the landscape and in nursery plantings. The following is more information.
We are seeing feeding activity of harlequin bugs on cleome and snapdragons in landscapes. In the nursery or greenhouse the harlequin bugs are found feeding on ornamental cabbage and kale plants that are being grown for fall sales. Control with Acephate or synthetic pyrethroids such as Astro or Talstar.
Information from the September 11, 2009 TPM/IPM Weekly Report for Arborists, Landscape Managers & Nursery Managers from the University of Maryland Cooperative Extension.