Abstract
Broccoli ( Brassica oleracea ‘Packman Hybrid’), mustard ( B. kabar ‘Southern Giant Curled’), and rape ( B. napus ‘Dwarf Essex’) were evaluated as trap crops to manage harlequin bugs, Murgantia histrionica (Hahn), in broccoli field plots during 1994 and 1995 in Montgomery County, Virginia. Mustard and rape prevented low densities of harlequin bugs from reaching the main broccoli crop, but at high densities harlequin bugs moved from the trap plants into the primary crop. This indicates that harlequin bugs attracted to trap plants may damage the main crop if their numbers reach relatively high levels.
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