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J Econ Entomol

Title:		Trap Cropping Harlequin Bug: Distance of Separation Influences Female Movement and Oviposition
Author(s):		Bier AD; Wallingford AK; Haber AI; Herlihy-Adams MV; Weber DC;
Address:		"Invasive Insect Biocontrol and Behavior Laboratory, USDA Agricultural Research Service, Beltsville, MD, USA. Cooperative Extension IPM, University of New Hampshire, Durham, NH, USA"
Journal Title:		J Econ Entomol
Year:		2021
Volume:		114
Issue:		2
Page Number:		848 - 856
DOI:		10.1093/jee/toab022
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"To evaluate perimeter trap crops for management of harlequin bug, Murgantia histrionica (Hahn), we undertook greenhouse and field experiments with mustard greens as trap crop for a collard cash crop. We confirmed that harlequin bugs prefer to immigrate to and reside on mustard. Females, however, in greenhouse cage experiments, 'commuted' to collards to lay their eggs. In separate spring and fall field plantings, using replicated 12 m by 12 m collard plots in 1-ha fields, we tested mustard planted as an adjacent perimeter trap crop, or a perimeter trap crop separated by 2 unplanted rows (2.3 m), or with no trap crop. Adults accumulated on the spring mustard crop but overall numbers remained low, with all collards sustaining <1% leaves damaged. In the fall, the separation of 2.3 m reduced oviposition on collards fourfold, and feeding damage approximately 2.5-fold, compared to collards with an adjacent trap crop. Fall control plots with no border trap crop showed even lower foliar damage; likely result of preferential immigration of harlequin bugs to mustard at the field scale, resulting in fewer bugs near the control treatment plots. Thus, the spatial arrangement of the mustard trap crop, and its separation from the cash crop, influences pest abundance and damage. A separated mustard border can reduce bug movement including female commuting and egg-laying, thus better protecting the collard cash crop. Future research should address reduction in area of trap crops, deployment of semiochemicals, and possible changes in timing, to promote trap cropping that is practical for grower implementation"
Keywords:		"Animals *Brassicaceae Crops, Agricultural Female *Heteroptera Oviposition Pheromones Brassicaceae cole crops commuting crucifer cultural control;"
Notes:		"MedlineBier, Alexander D Wallingford, Anna K Haber, Ariela I Herlihy-Adams, Megan V Weber, Donald C eng England 2021/03/12 J Econ Entomol. 2021 Apr 13; 114(2):848-856. doi: 10.1093/jee/toab022"